J/A+A/695/L23 Stellar masses in nearby disc galaxies (Marasco+, 2025)
Photometric versus dynamical stellar masses and their impact on scaling
relations in nearby disc galaxies.
Marasco A., Fall S.M., Di Teodoro E.M., Mancera Pina P.E.
<Astron. Astrophys. 695, L23 (2025)>
=2025A&A...695L..23M 2025A&A...695L..23M (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Photometry, ultraviolet ; Optical ; Infrared
Keywords: techniques: photometric - galaxies: evolution -
galaxies: fundamental parameters - galaxies: kinematics and dynamics -
galaxies: photometry - galaxies: stellar content
Abstract:
The study of scaling relations of disc galaxies and their evolution
across cosmic time requires accurate estimates of galaxy stellar
masses Mstar over broad redshift ranges. While photometric Mstar
estimates (Mphot) based on spectral energy distribution (SED)
modelling methods are employed routinely at high-z, it is unclear to
what extent these are compatible with dynamical Mstar estimates
(Mdyn), available for nearby galaxies.
Here we compare newly determined, SED-model based Mphot with
previously obtained Mdyn inferred via rotation curve decomposition
techniques in a sample of ∼100 nearby galaxies from the SPARC
database. We find that the two mass estimates show a systematic
agreement at the 12% (0.05dex) level and a ∼55% (0.22dex) scatter
across almost 5dex in Mstar. Our Mphot estimates correspond to
mass-to-light ratios in the 3.6um band that increase gradually with
3.6um luminosity, as a consequence of the earlier (later) assembly
history of high-mass (low-mass) disc galaxies.
The choice of using either Mdyn or Mphot has only a marginal impact on
the slope and zero-point of the Tully-Fisher and Fall relations: the
observed orthogonal scatter in both relations is virtually the same
for the two methods, and indistinguishable from that derived using a
constant mass-to-light ratio in the 3.6um band. Mstar estimates based
on the assumption that discs are marginally stable lead to the largest
scatter in the scaling relations.
Description:
Photometric and physical properties for 154 nearby disc galaxies from
the Spitzer Photometry and Accurate Rotation Curves (SPARC) database
(Lelli et al., 2016AJ....152..157L 2016AJ....152..157L, Cat. J/AJ/152/157).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablec1.dat 169 154 Photometry catalogue
tablec2.dat 96 154 Galaxy properties
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See also:
J/AJ/152/157 : Mass models for 175 disk galaxies with SPARC (Lelli+, 2016)
J/A+A/612/L6 : j-M law from dwarf to massive spirals (Posti+, 2018)
Byte-by-byte Description of file: tablec1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Galaxy Galaxy name
13 A1 --- l_FUV Limit Flag on FUV (3-sigma level upper limit)
14- 18 F5.2 mag FUV ?=-9 far-UV magnitude (AB) (from Galex) (1)
21- 25 F5.2 mag e_FUV ?=-9 Uncertainty on the far-UV magnitude
27 I1 --- f_FUV [0/1] Flag
(1: used in SED fit, 0: not used in SED fit)
29 A1 --- l_NUV Limit Flag on NUV (3-sigma level upper limit)
30- 34 F5.2 mag NUV ?=-9 near-UV magnitude (AB) (from Galex) (1)
37- 41 F5.2 mag e_NUV ?=-9 Uncertainty on the near-UV magnitude
43 I1 --- f_NUV [0/1] Flag
(1: used in SED fit, 0: not used in SED fit)
46- 50 F5.2 mag gmag ?=-9 g-band magnitude (AB)
(from DESI Legacy) (1)
53- 57 F5.2 mag e_gmag ?=-9 Uncertainty on the g-band magnitude
59 I1 --- f_gmag [0/1] Flag
(1: used in SED fit, 0: not used in SED fit)
62- 66 F5.2 mag rmag ?=-9 r-band magnitude (AB)
(from DESI Legacy) (1)
69- 73 F5.2 mag e_rmag ?=-9 Uncertainty on the r-band magnitude
75 I1 --- f_rmag [0/1] Flag
(1: used in SED fit, 0: not used in SED fit)
78- 82 F5.2 mag zmag ?=-9 z-band magnitude (AB)
(from DESI Legacy) (1)
85- 89 F5.2 mag e_zmag ?=-9 Uncertainty on the z-band magnitude
91 I1 --- f_zmag [0/1] Flag
(1: used in SED fit, 0: not used in SED fit)
93 A1 --- l_Jmag Limit Flag on Jmag (3-sigma level upper limit)
94- 98 F5.2 mag Jmag J-band magnitude (AB) (from 2MASS) (1)
100-104 F5.2 mag e_Jmag ?=-9 Uncertainty on the J-band magnitude
106 I1 --- f_Jmag [0/1] Flag
(1: used in SED fit, 0: not used in SED fit)
108 A1 --- l_Hmag Limit Flag on Hmag (3-sigma level upper limit)
109-113 F5.2 mag Hmag H-band magnitude (AB) (from 2MASS) (1)
116-120 F5.2 mag e_Hmag ?=-9 Uncertainty on the H-band magnitude
122 I1 --- f_Hmag [0/1] Flag
(1: used in SED fit, 0: not used in SED fit)
124 A1 --- l_Ksmag Limit Flag on Ksmag (3-sigma level upper limit)
125-129 F5.2 mag Ksmag Ks-band magnitude (AB) (from 2MASS) (1)
132-136 F5.2 mag e_Ksmag ?=-9 Uncertainty on the Ks-band magnitude
138 I1 --- f_Ksmag [0/1] Flag
(1: used in SED fit, 0: not used in SED fit)
140 A1 --- l_3.6um Limit Flag on 3.6um (3-sigma level upper limit)
141-145 F5.2 mag 3.6um 3.6um-band magnitude (AB)
(from Spitzer/IRAC1) (1)
148-152 F5.2 mag e_3.6um ?=-9 Uncertainty on the 3.6um-band magnitude
154 I1 --- f_3.6um [0/1] Flag
(1: used in SED fit, 0: not used in SED fit)
156 A1 --- l_22um Limit Flag on 22mag (3-sigma level upper limit)
157-161 F5.2 mag 22um 22um-band magnitude (AB) (from WISE, band 4) (1)
163-167 F5.2 mag e_22um ?=-9 Uncertainty on the 22um-band magnitude
169 I1 --- f_22um [0/1] Flag
(1: used in SED fit, 0: not used in SED fit)
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Note (1): Magnitudes in the AB system, uncorrected for foreground extinction
in the Milky Way.
Unavailable wavebands are indicated with a "-9" in both the measurement
and the associated Uncertainty.
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Byte-by-byte Description of file: tablec2.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Galaxy Galaxy name
13- 18 F6.2 Mpc Dist Distance
20- 24 F5.2 Mpc e_Dist Distance uncertainty
26- 31 F6.2 [Msun] logMdyn ?=-99 log10 stellar mass,
dynamical method (1)
33- 36 F4.2 [Msun] e_logMdyn ?=0 log10 uncertainty on the dynamical
stellar mass
38- 43 F6.2 [Msun] logMphot ?=-99 log10 stellar mass,
photometric method (2)
45- 48 F4.2 [Msun] e_logMphot ?=0 log10 uncertainty on the
photometric stellar mass
50- 54 F5.3 --- pval p-value of the chi2 statistics for
SED fitting
56- 61 F6.2 [Msun] logMmsc ?=-99 log10 stellar mass, MSC method (2)
63- 66 F4.2 [Msun] e_logMmsc ?=0 log10 uncertainty on the
MSC stellar mass
68- 72 F5.2 [Msun] logM05 log10 stellar mass, M/L=0.5 method (2)
74- 77 F4.2 [Msun] e_logM05 log10 uncertainty on the stellar mass
for M/L=0.5
79- 81 I3 km/s Vfl Vflat: rotation velocity in the flat
part of Vrot(R) (3)
83- 84 I2 km/s e_Vfl Uncertainty on Vflat
86- 91 F6.2 [km/s/kpc] logjs ?=-99 log10 stellar specific angular
momentum (4)
93- 96 F4.2 [km/s/kpc] e_logjs ?=0 log10 uncertainty on stellar specific
angular momentum
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Note (1): from Posti et al., 2019A&A...621A..56P 2019A&A...621A..56P.
Note (2): determined in this study.
Note (3): Rotation velocities are from Lelli et al., 2016AJ....152..157L 2016AJ....152..157L,
Cat. J/AJ/152/157
Note (4): Stellar specific angular momenta are from Posti et al.,
2018A&A...612L...6P 2018A&A...612L...6P, Cat. J/A+A/612/L6.
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Acknowledgements:
Antonino Marasco, antonino.marasco(at)inaf.it
(End) Patricia Vannier [CDS] 04-Mar-2025