J/MNRAS/504/3831 Stellar mass dist. of local star-forming gal. (Bonfini+, 2021)
The star formation reference survey.
IV. Stellar mass distribution of local star-forming galaxies.
Bonfini P., Zezas A., Ashby M.L.N., Willner S.P., Maragkoudakis A.,
Kouroumpatzakis K., Sell P.H., Kovlakas K.
<Mon. Not. R. Astron. Soc., 504, 3831-3861 (2021)>
=2021MNRAS.504.3831B 2021MNRAS.504.3831B (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, nearby ; Galaxies, photometry ; Optical :
Photometry, infrared
Keywords: galaxies: evolution - galaxies: luminosity function, mass function -
galaxies: photometry - galaxies: star formation - galaxies: structure
Abstract:
We constrain the mass distribution in nearby, star-forming galaxies
with the Star Formation Reference Survey (SFRS), a galaxy sample
constructed to be representative of all known combinations of star
formation rate, dust temperature, and specific star formation rate
(sSFR) that exist in the Local Universe. An innovative 2D bulge/disc
decomposition of the 2MASS/Ks-band images of the SFRS galaxies
yields global luminosity and stellar mass functions (MFs), along with
separate MFs for their bulges and discs. These accurate MFs cover the
full range from dwarf galaxies to large spirals, and are
representative of star-forming galaxies selected based on their
infrared luminosity, unbiased by active galactic nucleus content and
environment. We measure an integrated luminosity density
j=1.72±0.93x109L_☉/h/Mpc3 and a total stellar mass density
ρM=4.61±2.40x108M☉/h/Mpc3. While the stellar mass of
the average star-forming galaxy is equally distributed between its
sub-components, discs globally dominate the mass density budget by a
ratio 4:1 with respect to bulges. In particular, our functions suggest
that recent star formation happened primarily in massive systems,
where they have yielded a disc stellar mass density larger than that
of bulges by more than 1 dex. Our results constitute a reference
benchmark for models addressing the assembly of stellar mass on the
bulges and discs of local (z=0) star-forming galaxies.
Description:
We obtained archival Ks-band 2MASS data for the galaxies composing the
sample of the SFRS, with the ultimate intent of studying the stellar
MF in star-forming galaxies, and the distribution of stellar mass in
their disc and bulge subcomponents.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tabled1.dat 138 369 List of SDSS (Data Release 12) u, r, and
2MASS J, H, K magnitudes for the SFRS sample
tabled2.dat 175 573 GALFIT model results for the SFRS sample
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See also:
J/PASP/123/1011 : Star Formation Reference Survey (SFRS) (Ashby+, 2011)
J/MNRAS/482/560 : Star formation in nearby galaxies (Mahajan+, 2019)
J/MNRAS/506/3079 : Halpha and other SFR indicators (Kouroumpatzakis+, 2021)
Byte-by-byte Description of file: tabled1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- SFRS [1/369] SFRS ID
5- 26 A22 --- Name Common galaxy name
28- 50 A23 --- SDSS SDSS-DR12 ID (SDSSJHHMMSS.ss+DDMMSS.s)
52- 57 F6.3 --- umag ?=- SDSS u magnitude (in maggy unit)
59- 64 F6.3 --- e_umag ?=- SDSS u magnitude error (in maggy unit)
66- 71 F6.3 --- rmag ?=- SDSS r magnitude (in maggy unit)
73- 78 F6.3 --- e_rmag ?=- SDSS r magnitude error (in maggy unit)
80- 99 A20 --- 2MASS 2MASS Extended Source Catalogue (XSC) or
Point Source Catalogue (PSC) ID (1)
101-106 F6.3 mag Jmag 2MASS J-band magnitude (Vega)
108-112 F5.3 mag e_Jmag ?=- 2MASS H-band magnitude (Vega) error
114-119 F6.3 mag Hmag 2MASS J-band magnitude (Vega)
121-125 F5.3 mag e_Hmag ?=- 2MASS H-band magnitude (Vega) error
127-132 F6.3 mag Kmag 2MASS K-band magnitude (Vega)
134-138 F5.3 mag e_Kmag ?=- 2MASS K-band magnitude (Vega) error
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Note (1): XSC-HHMMSSss+DDMMSSs for XSC, PSC-HHMMSSss+DDMMSSs for PSC.
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Byte-by-byte Description of file: tabled2.dat
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Bytes Format Units Label Explanations
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1- 22 A22 --- Name Common galaxy name
24- 46 A23 --- Model Selected model (see definition in Sect. 4.2)
48- 56 A9 --- Comp Selected model component (see definition in
Sect. 4.2) (1)
58- 62 A5 --- Phys Physical interpretation of component (2)
65- 67 F3.1 --- n ?=- Sersic index
69- 73 F5.1 arcsec R ?=- Effective radius (for Sersic), or
scale height (for exDisk)
75- 79 F5.2 mag Kmag Component K-band magnitude (Vega)
81- 84 F4.2 mag e_Kmag Component K-band magnitude (Vega) error
86- 90 F5.3 --- Kcorr K correction factor
92- 99 E8.3 10-7W LK Component K-band luminosity
101-105 F5.2 mag u-r ?=- Component color form our decomposition
(the global galaxy color is reported
in Table D1)
107-111 F5.3 Lsun/Msun M/L ?=- Component mass-to-light ratio
113-117 F5.3 Lsun/Msun M/Lgal Galaxy mass-to-light ratio
119-126 E8.3 Msun M ?=- Component mass (3)
128-135 E8.3 Msun Mgal Component mass
137-142 A6 --- Method Decomposition method (4)
144-148 F5.3 --- B/T ?=0 Bulge-to-total ratio
150-154 F5.3 --- e_B/T ?=0 Bulge-to-total ratio error
156-163 E8.3 Mpc Dist Distance from Ashby et al.
(2011PASP..123.1011A 2011PASP..123.1011A, Cat. J/PASP/123/1011)
165-170 A6 --- Nuc Nuclear classification by Maragkoudakis et
al. (2018)
172-175 F4.1 --- Weight Galaxy representativeness weight from
Ashby et al. (2011PASP..123.1011A 2011PASP..123.1011A,
Cat. J/PASP/123/1011) (5)
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Note (1): model component (see definition in Sect. 4.2) are
Sersic, Sersic_n1, Sersic_n4, exDisk and psfAgn.
Note (2): Physical interpretation of component as AGN, bulge, disk or mixed.
Note (3): Because a different M/L is used for bulge, disk, and whole galaxy,
the masses of the sub-components do not necessarily sum up to the
total mass.
Note (4): GALFIT: through 2D fitting,
C->B/T: derived using the concentration index (see Section 6.2)
Note (5): If multiplied by a constant factor of 6.7, a weight provides the
number of galaxies that the SFRS target represents in the PSCz catalogue
(see Ashby et al., 2011PASP..123.1011A 2011PASP..123.1011A, Cat. J/PASP/123/1011, for details).
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History:
From electronic version of the journal
References:
Ashby et al., Paper I 2011PASP..123.1011A 2011PASP..123.1011A, Cat. J/PASP/123/1011
Maragkoudakis et al., Paper II 2018MNRAS.475.1485M 2018MNRAS.475.1485M
Mahajan et al., Paper III 2019MNRAS.482..560M 2019MNRAS.482..560M
Kouroumpatzakis et al., Paper V 2021MNRAS.506.3079K 2021MNRAS.506.3079K, Cat. J/MNRAS/506/3079
(End) Patricia Vannier [CDS] 18-Jan-2022