J/ApJS/210/3 SDSS bulge, disk and total stellar mass estimates (Mendel+, 2014)
A catalog of bulge, disk, and total stellar mass estimates for the Sloan Digital
Sky Survey.
Mendel J.T., Simard L., Palmer M., Ellison S.L., Patton D.R.
<Astrophys. J. Suppl. Ser., 210, 3 (2014)>
=2014ApJS..210....3M 2014ApJS..210....3M
ADC_Keywords: Galaxies, optical ; Models, evolutionary ;
Surveys ; Galaxy catalogs ; Morphology ; Redshifts
Keywords: galaxies: bulges - galaxies: fundamental parameters -
galaxies: statistics - galaxies: structure
Abstract:
We present a catalog of bulge, disk, and total stellar mass estimates
for ∼660000 galaxies in the Legacy area of the Sloan Digital Sky
Survey Data (SDSS) Release 7. These masses are based on a homogeneous
catalog of g- and r-band photometry described by Simard et al. (2011,
Cat. J/ApJS/196/11), which we extend here with bulge+disk and Sersic
profile photometric decompositions in the SDSS u, i, and z bands. We
discuss the methodology used to derive stellar masses from these data
via fitting to broadband spectral energy distributions (SEDs), and
show that the typical statistical uncertainty on total, bulge, and
disk stellar mass is ∼0.15 dex. Despite relatively small formal
uncertainties, we argue that SED modeling assumptions, including the
choice of synthesis model, extinction law, initial mass function, and
details of stellar evolution likely contribute an additional 60%
systematic uncertainty in any mass estimate based on broadband SED
fitting. We discuss several approaches for identifying genuine
bulge+disk systems based on both their statistical likelihood and an
analysis of their one-dimensional surface-brightness profiles, and
include these metrics in the catalogs. Estimates of the total, bulge
and disk stellar masses for both normal and dust-free models and their
uncertainties are made publicly available here.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 74 657996 Total stellar mass estimates from Sersic photometry
table4.dat 155 657996 Total stellar mass estimates from bulge+disk
photometry
table5.dat 74 657996 Total stellar mass estimates from Sersic photometry
with dust-free models
table6.dat 155 657996 Total stellar mass estimates from bulge+disk
photometry with dust-free models
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See also:
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
J/ApJS/196/11 : Bulge+disk decompositions of SDSS galaxies (Simard+, 2011)
J/ApJS/142/1 : DEEP Groth Strip Survey. II. (Simard+, 2002)
http://www.sdss.org/ : SDSS home page
Byte-by-byte Description of file: table[35].dat
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Bytes Format Units Label Explanations
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1- 18 I18 --- objID SDSS-DR7 "objID" object identifier
20- 27 F8.6 --- z [0.005/0.4] SDSS-DR7 spectroscopic redshift
29- 36 F8.5 [Msun] logM [5/13] log total stellar mass; median
38- 45 F8.5 [Msun] b_logM 16th percentile of log total stellar mass
47- 54 F8.5 [Msun] B_logM 84th percentile of log total stellar mass
56- 63 F8.6 --- zmin Lower redshift selection limit
65- 72 F8.6 --- zmax Upper redshift selection limit
74 I1 --- Type [1/4] The 1d profile type (G1)
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Byte-by-byte Description of file: table[46].dat
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Bytes Format Units Label Explanations
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1- 18 I18 --- objID SDSS-DR7 "objID" object identifier
20- 27 F8.6 --- z [0.005/0.4] SDSS-DR7 spectroscopic redshift
29- 36 F8.5 [Msun] logMt [6/13] Log total stellar mass; median
38- 45 F8.5 [Msun] b_logMt 16th percentile of log total stellar mass
47- 54 F8.5 [Msun] B_logMt 84th percentile of log total stellar mass
56- 64 F9.5 [Msun] logMb [4/13]?=-99 Log bulge stellar mass; median
66- 74 F9.5 [Msun] b_logMb ?=-99 16th percentile of log bulge stellar mass
76- 84 F9.5 [Msun] B_logMb ?=-99 84th percentile of log bulge stellar mass
86- 94 F9.5 [Msun] logMd [5/13]?=-99 Log disk stellar mass; median
96-104 F9.5 [Msun] b_logMd ?=-99 16th percentile of log disk stellar mass
106-114 F9.5 [Msun] B_logMd ?=-99 84th percentile of log disk stellar mass
116-123 F8.6 --- zmin Lower redshift selection limit
125-132 F8.6 --- zmax Upper redshift selection limit
134-141 F8.6 --- PpS [0/1] F-test probability that 2 components are
not required
143 I1 --- Type [1/4] The 1d profile type (G1)
145-155 F11.6 --- dBD [0/3685] Bulge+disk mass offset (2)
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Note (2): this offset is the difference between the total mass and sum of
the bulge and disk masses, and expressed in units of the standard error.
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Global notes:
Note (G1): We divide the galaxy population into four classes based on their
best-fitting GIM2D (Simard et al. 1998ASPC..145..108S 1998ASPC..145..108S and 2002,
Cat. J/ApJS/142/1) profiles as follows:
1 = A de Vaucouleurs component dominates the surface-brightness profile at
all radii, or no exponential component is fit (i.e., B/T=1). We also
include here galaxies for which the best-fit disk scale length is less
than 0.2 pixels. In terms of the single-component Sersic profiles fit by
Simard et al., 2011, Cat. J/ApJS/196/11, the distribution of n for these
profiles peaks at n∼4-5. These are single-component elliptical galaxies,
and are related to profile types 5 and 8 from Allen et al.
(2006MNRAS.371....2A 2006MNRAS.371....2A).
2 = The exponential component dominates the surface-brightness profile at all
radii, or no de Vaucouleurs component is fit (i.e., B/T=0). As for type 1
profiles, we include here any fits where the half-light radius of the
best-fit de Vaucouleurs profile is less than 0.2 pixels (∼2.6% of fits).
These galaxies have low n in the single Sersic fits, and are either pure
disk systems or disks hosting a weak central pseudo-bulge. These galaxies
are related to profile types 2, 5, 7, and 8 from Allen et al.
(2006MNRAS.371....2A 2006MNRAS.371....2A).
3 = The de Vaucouleurs component dominates the surface-brightness profile in
the central regions, while the exponential component dominates at large
radii. The de Vaucouleurs and exponential profiles cross only once at an
r-band surface brightness, µr, less than 26mag/arcsec2. For the
most part these are genuine bulge+disk systems, however in some cases
these are single-component (elliptical) galaxies in which a disk has been
included to account for deviations from a pure de Vaucouleurs profile,
e.g., tidal features, isophotal twists, or n≳4. Such spurious fits
stand out in the distribution of axis ratios as an excess of face-on
disks. These are classified as type 1 profiles by Allen et al.
(2006MNRAS.371....2A 2006MNRAS.371....2A).
4 = These galaxies include everything that cannot be classified as types 1,
2, or 3. These include galaxies where the bulge and disk
surface-brightness profiles cross twice at µr<26mag/arcsec2, or
where the disk and bulge profiles are inverted - i.e., the disk profile
dominates in the central regions and the bulge dominates at large radii.
These encompass profile types 3, 4 and 6 from Allen et al.
(2006MNRAS.371....2A 2006MNRAS.371....2A).
See section 5.2 for further details.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 27-Jan-2014