J/A+A/703/A5 Local galaxies scaling relations (Mattolini+, 2025)
Re-assessing the stellar population scaling relations of the galaxies in the
Local Universe.
Mattolini D., Zibetti S., Gallazzi A.R., Scholz-Diaz L., Pratesi J.
<Astron. Astrophys. 703, A5 (2025)>
=2025A&A...703A...5M 2025A&A...703A...5M (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies ; Stars, masses ; Stars, ages ; Photometry ; Optical
Keywords: galaxies: evolution - galaxies: fundamental parameters -
galaxies: general - galaxies: statistics - galaxies: stellar content
Abstract:
Local galaxies follow scaling relations between mass and stellar
population properties, such as age and metallicity. These relations
encode fundamental information about the past evolutionary history of
galaxies. We want to revise stellar population scaling relations of
local galaxies leveraging the largest spectroscopic dataset provided
by the SDSS DR7 (0.005<z<0.22) and using improved Stellar Population
Synthesis (SPS) methods and novel SDSS aperture bias corrections. We
apply statistical weights to account for selection biases and
implement corrections for SDSS fibre aperture limitations. In a
Bayesian framework, we estimate stellar masses, mean stellar ages, and
mean stellar metallicities by comparing spectral indices and
photometry with composite stellar population models, adopting
state-of-the-art ingredients and updated prescriptions to better
capture the complexity of galaxies star formation and chemical
enrichment histories. We also test different models and priors. We
estimate light-weighted mean stellar ages for 354977 galaxies
(SNR≥10) and metallicities for 89,852 galaxies (SNR≥20) and
study their dependence on stellar mass. Key findings include: i) A
revised bimodal distribution in the mass-age plane, with a young
sequence (dominant at low masses) and an old sequence (dominant at
high masses), partly overlapping in mass and transitioning at
Mtr=1010.80M☉. ii) A Mass-Metallicity Relation (MZR)
shifted ∼0.2dex higher than previous studies. Our aperture
corrections produce mass-dependent reductions in masses, ages, and
metallicities, enhancing the young sequence and steepening the MZR at
low masses. iii) Using Halpha-based SFR classification, we found that
while star-forming/young and quiescent/old correspondences generally
hold, exceptions exist for many galaxies. Quiescent galaxies show
flatter, less scattered MZR than star-forming ones, converging at
high masses. iv) Different SPS modelling assumptions significantly
impact results, with star formation and chemical enrichment histories
having the strongest effects. These revised relations provide new
benchmarks for galaxy evolution studies and simulations. Systematic
effects of 0.1-0.2dex can arise from uncorrected aperture biases and
different SPS modelling choices. Consistent assumptions should be used
when comparing observations and models.
Description:
We provide a table containing photometric measurements of SDSS DR7
galaxies (Abazajian et al., 2009ApJS..182..543A 2009ApJS..182..543A) obtained using the
nearest neighbour match, based on the sky coordinates, of the MPA-JHU
(Brinchmann et al., 2004MNRAS.351.1151B 2004MNRAS.351.1151B) and the NYU-VAGC (Blanton et
al., 2005AJ....129.2562B 2005AJ....129.2562B) photometric catalogues. We provide
catalogues containing absorption-index measurements (from MPA-JHU
absorption-indices catalogue) together with derived physical
parameters (stellar masses, ages, metallicities). Separate catalogues
are constructed with and without the application of SDSS
absorption-index aperture-corrections (Zibetti et al.,
2025arXiv250819462Z 2025arXiv250819462Z). Statistical corrections for Malmquist bias are
applied to all galaxies irrespective of Signal to Noise Ratio (SNR),
while completeness corrections for selection biases are computed
separately for galaxies with SNR>=10 and SNR≥20, and are expressed
in units of h3Mpc-3 with h=0.7. We provide median trends for the
mass-age and mass-(stellar) metallicity relations, obtained both from
aperture-corrected and non aperture-corrected estimates, for the whole
galaxy sample also dividing galaxies between passive and star-
forming. We provide uncertainties for masses and ages estimates for
SNR grater than 10 and 20, while we provide uncertainties for stellar
metallicity estimates only for SNR greater than 20. We provide tables
containing the fractions of galaxies dividing the sample in passive
and star-forming, based on Star Formation Rate (SFR) estimates, and
young and old, based on age estimates.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
photom.dat 754 825263 Photometric measuremments
physpar.dat 334 825263 Non Aperture-corrected stellar populations
parameters and absorption indices measurements
physparc.dat 334 825263 Aperture-corrected stellar populations
parameters and aperture-corrected absorption
indices measurements
medtrun.dat 359 45 Median and percentiles of mass-age and
mass-metallicity relations for the total sample
and the passive and star-forming subsamples.
Associated uncertainties to masses, ages, and
metallicity estimates for the aperture-corrected
estimates
fraction.dat 45 70 Fractions of galaxies, in 0.1dex wide consecutive
bins of mass, divided based on star formation rate
measurements and light-weighted age estimates
list.dat 140 24 List of fits files
fits/* . 24 Individual fits files
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Byte-by-byte Description of file: photom.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- IDX Duplicates-combined galaxy ID identifier (IDX)
8- 19 E12.6 mag umagP ?=- u-band Petrosian magnitude,
from MPA-JHU catalogue (PETROCOUNTS_u)
21- 32 E12.6 mag gmagP ?=- g-band Petrosian magnitude,
from MPA-JHU catalogue (PETROCOUNTS_g)
34- 45 E12.6 mag rmagP ?=- r-band Petrosian magnitude,
from MPA-JHU catalogue (PETROCOUNTS_r)
47- 58 E12.6 mag imagP ?=- i-band Petrosian magnitude,
from MPA-JHU catalogue (PETROCOUNTS_i)
60- 71 E12.6 mag zmagP ?=- z-band Petrosian magnitude,
from MPA-JHU catalogue (PETROCOUNTS_z)
73- 84 E12.6 mag e_umagP ?=- u-band Uncertainty on the Petrosian
magnitude, from MPA-JHU catalogue
(PETROCOUNTSERR_u)
86- 97 E12.6 mag e_gmagP ?=- g-band Uncertainty on the Petrosian
magnitude, from MPA-JHU catalogue
(PETROCOUNTSERR_g)
99-110 E12.6 mag e_rmagP ?=- r-band Uncertainty on the Petrosian
magnitude, from MPA-JHU catalogue
(PETROCOUNTSERR_r)
112-123 E12.6 mag e_imagP ?=- i-band Uncertainty on the Petrosian
magnitude, from MPA-JHU catalogue
(PETROCOUNTSERR_i)
125-136 E12.6 mag e_zmagP ?=- z-band Uncertainty on the Petrosian
magnitude, from MPA-JHU catalogue
(PETROCOUNTSERR_z)
138-147 F10.4 arcsec R50Pu ?=- u-band Radius with 50 percent of Petrosian
light, from MPA-JHU catalogue (PETROR50_u)
149-158 F10.4 arcsec R50Pg ?=- g-band Radius with 50 percent of Petrosian
light, from MPA-JHU catalogue (PETROR50_g)
160-169 F10.4 arcsec R50Pr ?=- r-band Radius with 50 percent of Petrosian
light, from MPA-JHU catalogue (PETROR50_r)
171-180 F10.4 arcsec R50Pi ?=- i-band Radius with 50 percent of Petrosian
light, from MPA-JHU catalogue (PETROR50_i)
182-191 F10.4 arcsec R50Pz ?=- z-band Radius with 50 percent of Petrosian
light, from MPA-JHU catalogue (PETROR50_z)
193-202 F10.4 arcsec e_R50Pu ?=- u-band Uncertainty on the radius with
50 percent of Petrosian light,
from MPA-JHU catalogue (PETROR50ERR_u)
204-213 F10.4 arcsec e_R50Pg ?=- g-band Uncertainty on the radius with
50 percent of Petrosian light,
from MPA-JHU catalogue (PETROR50ERR_g)
215-224 F10.4 arcsec e_R50Pr ?=- r-band Uncertainty on the radius with
50 percent of Petrosian light,
from MPA-JHU catalogue (PETROR50ERR_r)
226-235 F10.4 arcsec e_R50Pi ?=- i-band Uncertainty on the radius with
50 percent of Petrosian light,
from MPA-JHU catalogue (PETROR50ERR_i)
237-246 F10.4 arcsec e_R50Pz ?=- z-band Uncertainty on the radius with
50 percent of Petrosian light,
from MPA-JHU catalogue (PETROR50ERR_z)
248-252 F5.3 mag Redu u-band Reddening, from MPA-JHU catalogue
(REDDENING_u)
254-258 F5.3 mag Redg g-band Reddening, from MPA-JHU catalogue
(REDDENING_g)
260-264 F5.3 mag Redr r-band Reddening, from MPA-JHU catalogue
(REDDENING_r)
266-270 F5.3 mag Redi i-band Reddening, from MPA-JHU catalogue
(REDDENING_i)
272-276 F5.3 mag Redz z-band Reddening, from MPA-JHU catalogue
(REDDENING_z)
278-284 F7.3 mag Z00uMAG ?=- u-band Absolute magnitudes K-corrected at
redshift z=0, from NYU-VAGC (ABSMAGZ00u)
286-292 F7.3 mag Z00gMAG ?=- g-band Absolute magnitudes K-corrected at
redshift z=0, from NYU-VAGC (ABSMAGZ00g)
294-300 F7.3 mag Z00rMAG ?=- r-band Absolute magnitudes K-corrected at
redshift z=0, from NYU-VAGC (ABSMAGZ00r)
302-308 F7.3 mag Z00iMAG ?=- i-band Absolute magnitudes K-corrected at
redshift z=0, from NYU-VAGC (ABSMAGZ00i)
310-316 F7.3 mag Z00zMAG ?=- z-band Absolute magnitudes K-corrected at
redshift z=0, from NYU-VAGC (ABSMAGZ00z)
318-324 F7.3 mag Z00JMAG ?=- J-band Absolute magnitudes K-corrected at
redshift z=0, from NYU-VAGC (ABSMAGZ00J)
326-332 F7.3 mag Z00HMAG ?=- H-band Absolute magnitudes K-corrected at
redshift z=0, from NYU-VAGC (ABSMAGZ00H)
334-340 F7.3 mag Z00KMAG ?=- K-band Absolute magnitudes K-corrected at
redshift z=0, from NYU-VAGC (ABSMAGZ00K)
342-353 E12.6 mag e_Z00uMAG ?=- u-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0,
from NYU-VAGC (ABSMAGERRZ00_u)
355-366 E12.6 mag e_Z00gMAG ?=- g-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0,
from NYU-VAGC (ABSMAGERRZ00_g)
368-379 E12.6 mag e_Z00rMAG ?=- r-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0,
from NYU-VAGC (ABSMAGERRZ00_r)
381-392 E12.6 mag e_Z00iMAG ?=- i-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0,
from NYU-VAGC (ABSMAGERRZ00_i)
394-405 E12.6 mag e_Z00zMAG ?=- z-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0,
from NYU-VAGC (ABSMAGERRZ00_z)
407-411 F5.3 mag e_Z00JMAG ?=- J-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0,
from NYU-VAGC (ABSMAGERRZ00_J)
413-417 F5.3 mag e_Z00HMAG ?=- H-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0,
from NYU-VAGC (ABSMAGERRZ00_H)
419-423 F5.3 mag e_Z00KMAG ?=- K-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0,
from NYU-VAGC (ABSMAGERRZ00_K)
425-433 F9.6 mag Z00Kcoru ?=- u-band K-corrections calculated at
redshift z=0, from NYU-VAGC (KCORRECTZ00u)
435-443 F9.6 mag Z00Kcorg ?=- g-band K-corrections calculated at
redshift z=0, from NYU-VAGC (KCORRECTZ00g)
445-453 F9.6 mag Z00Kcorr ?=- r-band K-corrections calculated at
redshift z=0, from NYU-VAGC (KCORRECTZ00r)
455-463 F9.6 mag Z00Kcori ?=- i-band K-corrections calculated at
redshift z=0, from NYU-VAGC (KCORRECTZ00i)
465-473 F9.6 mag Z00Kcorz ?=- z-band K-corrections calculated at
redshift z=0, from NYU-VAGC (KCORRECTZ00z)
475-483 F9.6 mag Z00KcorJ ?=- J-band K-corrections calculated at
redshift z=0, from NYU-VAGC (KCORRECTZ00J)
485-493 F9.6 mag Z00KcorH ?=- H-band K-corrections calculated at
redshift z=0, from NYU-VAGC (KCORRECTZ00H)
495-503 F9.6 mag Z00KcorK ?=- K-band K-corrections calculated at
redshift z=0, from NYU-VAGC (KCORRECTZ00K)
505-514 F10.6 mag Z01uMAG ?=- u-band Absolute magnitudes K-corrected at
redshift z=0.1, from NYU-VAGC (ABSMAGZ01u)
516-525 F10.6 mag Z01gMAG ?=- g-band Absolute magnitudes K-corrected at
redshift z=0.1, from NYU-VAGC (ABSMAGZ01g)
527-536 F10.6 mag Z01rMAG ?=- r-band Absolute magnitudes K-corrected at
redshift z=0.1, from NYU-VAGC (ABSMAGZ01r)
538-547 F10.6 mag Z01iMAG ?=- i-band Absolute magnitudes K-corrected at
redshift z=0.1, from NYU-VAGC (ABSMAGZ01i)
549-558 F10.6 mag Z01zMAG ?=- z-band Absolute magnitudes K-corrected at
redshift z=0.1, from NYU-VAGC (ABSMAGZ01z)
560-569 F10.6 mag Z01JMAG ?=- J-band Absolute magnitudes K-corrected at
redshift z=0.1, from NYU-VAGC (ABSMAGZ01J)
571-580 F10.6 mag Z01HMAG ?=- H-band Absolute magnitudes K-corrected at
redshift z=0.1, from NYU-VAGC (ABSMAGZ01H)
582-591 F10.6 mag Z01KMAG ?=- K-band Absolute magnitudes K-corrected at
redshift z=0.1, from NYU-VAGC (ABSMAGZ01K)
593-604 E12.6 mag e_Z01uMAG ?=- u-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0.1,
from NYU-VAGC (ABSMAGERRZ01_u)
606-617 E12.6 mag e_Z01gMAG ?=- g-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0.1,
from NYU-VAGC (ABSMAGERRZ01_g)
619-630 E12.6 mag e_Z01rMAG ?=- r-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0.1,
from NYU-VAGC (ABSMAGERRZ01_r)
632-643 E12.6 mag e_Z01iMAG ?=- i-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0.1,
from NYU-VAGC (ABSMAGERRZ01_i)
645-656 E12.6 mag e_Z01zMAG ?=- z-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0.1,
from NYU-VAGC (ABSMAGERRZ01_z)
658-662 F5.3 mag e_Z01JMAG ?=- J-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0.1,
from NYU-VAGC (ABSMAGERRZ01_J)
664-668 F5.3 mag e_Z01HMAG ?=- H-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0.1,
from NYU-VAGC (ABSMAGERRZ01_H)
670-674 F5.3 mag e_Z01KMAG ?=- K-band Uncertainty on the absolute
magnitude K-corrected at redshift z=0.1,
from NYU-VAGC (ABSMAGERRZ01_K)
676-684 F9.6 mag Z01Kcoru ?=- u-band K-corrections calculated at
redshift z=0.1 from NYU-VAGC (KCORRECTZ01u)
686-694 F9.6 mag Z01Kcorg ?=- g-band K-corrections calculated at
redshift z=0.1 from NYU-VAGC (KCORRECTZ01g)
696-704 F9.6 mag Z01Kcorr ?=- r-band K-corrections calculated at
redshift z=0.1 from NYU-VAGC (KCORRECTZ01r)
706-714 F9.6 mag Z01Kcori ?=- i-band K-corrections calculated at
redshift z=0.1 from NYU-VAGC (KCORRECTZ01i)
716-724 F9.6 mag Z01Kcorz ?=- z-band K-corrections calculated at
redshift z=0.1 from NYU-VAGC (KCORRECTZ01z)
726-734 F9.6 mag Z01KcorJ ?=- J-band K-corrections calculated at
redshift z=0.1 from NYU-VAGC (KCORRECTZ01J)
736-744 F9.6 mag Z01KcorH ?=- H-band K-corrections calculated at
redshift z=0.1 from NYU-VAGC (KCORRECTZ01H)
746-754 F9.6 mag Z01KcorK ?=- K-band K-corrections calculated at
redshift z=0.1 from NYU-VAGC (KCORRECTZ01K)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: physpar.dat physparc.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- IDX Duplicates-combined galaxy ID identifier
(IDX)
8- 15 F8.4 deg RAdeg Right Ascension (J2000) (RA)
17- 24 F8.4 deg DEdeg Declination (J2000) (DEC)
26- 32 F7.4 --- z Duplicates-combined redshift of the
duplicated observations, from MPA-JHU
catalogue (Z)
34- 35 I2 --- SN Duplicates-combined median S/N per pixel
of the whole spectrum (SN)
37- 48 E12.6 --- D4000N ?=- Duplicates-combined restframe 4000
Angstrom break, from MPA-JHU catalogue
(D4000N)
50- 61 E12.6 --- e_D4000N ?=- Duplicates-combined restframe 4000
Angstrom break uncertainty, from MPA-JHU
catalogue (D4000N_ERR)
63- 74 E12.6 0.1nm Hbeta ?=- Duplicates-combined restframe
Lick_Hbeta index, from MPA-JHU catalogue
(HBETA)
76- 87 E12.6 0.1nm e_Hbeta ?=- Duplicates-combined restframe
Lick_Hbeta index uncertainty,
from MPA-JHU catalogue (HBETA_ERR)
89-100 E12.6 0.1nm HDHG ?=- Duplicates-combined restframe
LickHdelta+LickHgamma index,
from MPA-JHU catalogue (HDHG)
102-113 E12.6 0.1nm e_HDHG ?=- Duplicates-combined restframe
LickHdelta+LickHgamma index
uncertainty, from MPA-JHU catalogue
(HDHG_ERR)
115-126 E12.6 0.1nm [Mg/Fe]P ?=- Duplicates-combined restframe [Mg/Fe]
index, from MPA-JHU catalogue (MGFE_P)
128-139 E12.6 0.1nm e_[Mg/Fe]P ?=- Duplicates-combined restframe [Mg/Fe]
index uncertainty, from MPA-JHU catalogue
(MGFEPERR)
141-152 E12.6 mag [Mg2/Fe] ?=- Duplicates-combined restframe [Mg2/Fe]
index, from MPA-JHU catalogue (MG2FE)
154-165 E12.6 mag e_[Mg2/Fe] ?=- Duplicates-combined restframe [Mg2/Fe]
index uncertainty, from MPA-JHU catalogue
(MG2FE_ERR)
167-173 F7.3 [Msun] logMstarMed ?=- Logarithm of the median value of the
stellar mass (MSTAR_MEDIAN)
175-181 F7.3 [Msun] logMstarP16 ?=- Logarithm of the 16 percentile of the
stellar mass (MSTAR_P16)
183-189 F7.3 [Msun] logMstarP84 ?=- Logarithm of the 84 percentile of the
stellar mass (MSTAR_P84)
191-197 F7.3 [yr] logAgeWRMed ?=- Logarithm of the median value of the
petrosian r-band light-weighted stellar
age (AGEWR_MEDIAN)
199-205 F7.3 [yr] logAgeWRP16 ?=- Logarithm of the 16 percentile of the
petrosian r-band light-weighted stellar
age (AGEWR_P16)
207-213 F7.3 [yr] logAgeWRP84 ?=- Logarithm of the 84 percentile of the
petrosian r-band light-weighted stellar
age (AGEWR_P84)
215-221 F7.3 [yr] logAgeWMMed ?=- Logarithm of the median value of the
mass-weighted stellar age (AGEWM_MEDIAN)
223-229 F7.3 [yr] logAgeWMP16 ?=- Logarithm of the 16 percentile of the
mass-weighted stellar age (AGEWM_P16)
231-237 F7.3 [yr] logAgeWMP84 ?=- Logarithm of the 84 percentile of the
mass-weighted stellar age (AGEWM_P84)
239-246 F8.3 --- logZstarWRMEd ?=- Logarithm of the median value of the
petrosian r-band light-weighted stellar
metallicity (ZSTARWR_MEDIA)
248-255 F8.3 --- logZstarWRP16 ?=- Logarithm of the 16 percentile of the
petrosian r-band light-weighted stellar
metallicity (ZSTARWR_P16)
257-264 F8.3 --- logZstarWRP84 ?=- Logarithm of the 84 percentile of the
petrosian r-band light-weighted stellar
metallicity (ZSTARWR_P84)
266-273 F8.3 --- logZstarWMMed ?=- Logarithm of the median value of the
mass-weighted stellar metallicity)
(ZSTARWM_MEDIA)
275-282 F8.3 --- logZstarWMP16 ?=- Logarithm of the 16 percentile of the
mass-weighted stellar metallicity
(ZSTARWM_P16)
284-291 F8.3 --- logZstarWMP84 ?=- Logarithm of the 84 percentile of the
mass-weighted stellar metallicity
(ZSTARWM_P84)
293-304 E12.6 Mpc-3 SNR10corr ?=- Statistical corrections accounting for
selection-induced biases when selecting
galaxies with Signal to Noise Ratio ≥10
(in h3/Mpc3 unit) (SNR10_CORR)
306-317 E12.6 Mpc-3 SNR20corr ?=- Statistical corrections accounting for
selection-induced biases when selecting
galaxies with Signal to Noise Ratio ≥20
(in h3/Mpc3 unit) (SNR20_CORR)
319 I1 --- SNR10cut Boolean flag for the selection of galaxies
in the Main Galaxy Sample satisfying the
quality selection for the fit not
implementing aperture-corrections with
SNR>10 (SNR10_CUT)
321 I1 --- SNR20cut Boolean flag for the selection of galaxies
in the Main Galaxy Sample satisfying the
quality selection for the fit not
implementing aperture-corrections with
SNR>20 (SNR20_CUT)
323-334 E12.6 --- Vcorr ?=- Statistical weight to correct for the
Malmquist bias (VCORR)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: medtrun.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.5 [Msun] logMass Logarithm of the central value of the
stellar mass bin (MASS)
10- 16 F7.5 [yr] logAge ?=- Logarithm of the median value of
the petrosian r-band light-weighted
stellar age (AGE)
18- 24 F7.5 [yr] logAge16 ?=- Logarithm of the 16 percentile of
the petrosian r-band light-weighted
stellar age (AGE16)
26- 32 F7.5 [yr] logAge84 ?=- Logarithm of the 84 percentile of
the petrosian r-band light-weighted
stellar age (AGE84)
34- 40 F7.5 [yr] logAgePass ?=- Logarithm of the median value of
the petrosian r-band light-weighted
stellar age of the passive subsample
(AGE_PASS)
42- 48 F7.5 [yr] logAge16Pass ?=- Logarithm of the 16 percentile of
the petrosian r-band light-weighted
stellar age of the passive subsample
(AGE16_PASS)
50- 56 F7.5 [yr] logAge84Pass ?=- Logarithm of the 84 percentile of
the petrosian r-band light-weighted
stellar age of the passive subsample
(AGE84_PASS)
58- 64 F7.5 [yr] logAgeSF ?=- Logarithm of the median value of
the petrosian r-band light-weighted
stellar age of the star-forming
subsample (AGE_SF)
66- 72 F7.5 [yr] logAge16SF ?=- Logarithm of the 16 percentile of
the petrosian r-band light-weighted
stellar age of the star-forming
subsample (AGE16_SF)
74- 80 F7.5 [yr] logAge84SF ?=- Logarithm of the 16 percentile of
the petrosian r-band light-weighted
stellar age of the star-forming
subsample (AGE84_SF)
82- 88 F7.5 [yr] logAgeApc ?=- Logarithm of the median value of
the petrosian r-band light-weighted
stellar age (AGE_APCORR)
90- 96 F7.5 [yr] logAge16Apc ?=- Logarithm of the 16 percentile of
the petrosian r-band light-weighted
stellar age (AGE16_APCORR)
98-104 F7.5 [yr] logAge84Apc ?=- Logarithm of the 84 percentile of
the petrosian r-band light-weighted
stellar age (AGE84_APCORR)
106-112 F7.5 [yr] logAgeApcPass ?=- Logarithm of the median value of
the petrosian r-band light-weighted
stellar age of the passive subsample
(AGEAPCORRPASS)
114-120 F7.5 [yr] logAge16ApcPass ?=- Logarithm of the 16 percentile of
the petrosian r-band light-weighted
stellar age of the passive subsample
(AGE16APCORRPASS)
122-128 F7.5 [yr] logAge84ApcPass ?=- Logarithm of the 84 percentile of
the petrosian r-band light-weighted
stellar age of the passive subsample
(AGE84APCORRPASS)
130-136 F7.5 [yr] logAgeApcSF ?=- Logarithm of the median value of
the petrosian r-band light-weighted
stellar age of the star-forming
subsample (AGEAPCORRSF)
138-144 F7.5 [yr] logAge16ApcSF ?=- Logarithm of the 16 percentile of
the petrosian r-band light-weighted
stellar age of the star-forming
subsample (AGE16APCORRSF)
146-152 F7.5 [yr] logAge84ApcSF ?=- Logarithm of the 16 percentile
of the petrosian r-band
light-weighted stellar age of the
star-forming subsample
(AGE84APCORRSF)
154-161 F8.5 [-] logZstar ?=- Logarithm of the median value of
the petrosian r-band light-weighted
stellar metallicity (ZSTAR)
163-170 F8.5 [-] logZstar16 ?=- Logarithm of the 16 percentile of
the petrosian r-band light-weighted
stellar metallicity (ZSTAR16)
172-179 F8.5 [-] logZstar84 ?=- Logarithm of the 84 percentile of
the petrosian r-band light-weighted
stellar metallicity (ZSTAR84)
181-188 F8.5 [-] logZstarPass ?=- Logarithm of the median value of
the petrosian r-band light-weighted
stellar metallicity of the passive
subsample (ZSTAR_PASS)
190-197 F8.5 [-] logZstar16Pass ?=- Logarithm of the 16 percentile of
the petrosian r-band light-weighted
stellar metallicity of the passive
subsample (ZSTAR16_PASS)
199-206 F8.5 [-] logZstar84Pass ?=- Logarithm of the 84 percentile of
the petrosian r-band light-weighted
stellar metallicity of the passive
subsample (ZSTAR84_PASS)
208-215 F8.5 [-] logZstarSF ?=- Logarithm of the median value of
the petrosian r-band light-weighted
stellar metallicity of the
star-forming subsample (ZSTAR_SF)
217-224 F8.5 [-] logZstar16SF ?=- Logarithm of the 16 percentile of
the petrosian r-band light-weighted
stellar metallicity of the
star-forming subsample (ZSTAR16_SF)
226-233 F8.5 [-] logZstar84SF ?=- Logarithm of the 16 percentile of
the petrosian r-band light-weighted
stellar metallicity of the
star-forming subsample (ZSTAR84_SF)
235-242 F8.5 [-] logZstarApc ?=- Logarithm of the median value of
the petrosian r-band light-weighted
stellar metallicity (ZSTAR_APCORR)
244-251 F8.5 [-] logZstar16Apc ?=- Logarithm of the 16 percentile of
the petrosian r-band light-weighted
stellar metallicity (ZSTAR16_APCORR)
253-260 F8.5 [-] logZstar84Apc ?=- Logarithm of the 84 percentile of
the petrosian r-band light-weighted
stellar metallicity (ZSTAR84_APCORR)
262-269 F8.5 [-] logZstarApcPass ?=- Logarithm of the median value of
the petrosian r-band light-weighted
stellar metallicity of the passive
subsample (ZSTARAPCORRPASS)
271-278 F8.5 [-] logZstar16ApcPass ?=- Logarithm of the 16 percentile of
the petrosian r-band light-weighted
stellar metallicity of the passive
subsample (ZSTAR16APCORRPASS)
280-287 F8.5 [-] logZstar84ApcPass ?=- Logarithm of the 84 percentile of
the petrosian r-band light-weighted
stellar metallicity of the passive
subsample (ZSTAR84APCORRPASS)
289-296 F8.5 [-] logZstarApcSF ?=- Logarithm of the median value of
the petrosian r-band light-weighted
stellar metallicity of the
star-forming subsample
(ZSTARAPCORRSF)
298-305 F8.5 [-] logZstar16ApcSF ?=- Logarithm of the 16 percentile of
the petrosian r-band light-weighted
stellar metallicity of the
star-forming subsample
(ZSTAR16APCORRSF)
307-314 F8.5 [-] logZstar84ApcSF ?=- Logarithm of the 16 percentile of
the petrosian r-band light-weighted
stellar metallicity of the
star-forming subsample
(ZSTAR84APCORRSF)
316-323 F8.6 --- deltaMassSNR10 ?=- Half the range between the
logaritm of the 16 and 84 percentiles
of the mass estimates with SNR>10
implementing aperture-corrections
DELTAMASSSNR20)
325-332 F8.6 --- deltaMassSNR20 ?=- Half the range between the
logaritm of the 16 and 84 percentiles
of the mass estimates with SNR>20
implementing aperture-corrections
(DELTAMASSSNR10)
334-341 F8.6 --- deltaAgeSNR10 ?=- Half the range between the
logaritm of the 16 and 84 percentiles
of the r-band light-weighted stellar
age estimates with SNR>10
implementing aperture-corrections
(DELTAAGESNR10)
343-350 F8.6 --- deltaAgeSNR20 ?=- Half the range between the
logaritm of the 16 and 84 percentiles
of the r-band light-weighted stellar
age estimates with SNR>20
implementing aperture-corrections
(DELTAAGESNR20)
352-359 F8.6 --- deltaZstarSNR20 ?=- Half the range between the
logaritm of the 16 and 84 percentiles
of the r-band light-weighted stellar
metallicity estimates with SN R>20
implementing aperture-corrections
(DELTAZSTARSNR20)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: fraction.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 F5.2 [Msun] logMass Logarithm of the central value of the
stellar mass bin (MASS)
7- 10 F4.2 --- Young Fraction of galaxies with young stellar
populations (YOUNG)
12- 15 F4.2 --- Old Fraction of galaxies with old stellar
populations (OLD)
17- 20 F4.2 --- YoungApc Fraction of galaxies with young stellar
populations implementing
aperture-corrections (YOUNG_APCORR)
22- 25 F4.2 --- OldApc Fraction of galaxies with old stellar
populations implementing
aperture-corrections (OLD_APCORR)
27- 30 F4.2 --- PassOldApc Fraction of passive galaxies with old
stellar populations implementing
aperture-corrections (PASSIVEOLDAPCORR)
32- 35 F4.2 --- PassYoungApc Fraction of passive galaxies with young
stellar populations implementing
aperture-corrections
(PASSIVEYOUNGAPCORR)
37- 40 F4.2 --- SFOldAppcorr Fraction of star-forming galaxies with old
stellar populations implementing
aperture-corrections
(STAR-FORMINGOLDAPCORR)
42- 45 F4.2 --- SFYoungApc Fraction of star-forming galaxies with
young stellar populations implementing
aperture-corrections
(STAR-FORMINGYOUNGAPCORR)
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Nx Number of pixels along X-axis
4- 5 I2 --- Ny Number of pixels along Y-axis
7- 10 F4.2 --- bMass Lower value of Mass interval
12- 16 F5.2 --- BMass Upper value of Mass interval
18- 20 F3.1 --- dMass Mass resolution
22- 27 F6.3 --- bAge Lower value of Age interval
29- 34 F6.3 --- BAge Upper value of Age interval
36- 39 F4.2 --- dAge Age resolution
41- 42 I2 Kibyte size Size of FITS file
44-110 A67 --- FileName Name of FITS file, in subdirectory fits
112-140 A29 --- Title Title of the FITS file
--------------------------------------------------------------------------------
Acknowledgements:
Daniele Mattolini, daniele.mattolini(at)unitn.it
(End) Patricia Vannier [CDS] 24-Sep-2025