J/MNRAS/440/843 SIM2D parameters of SDSS-DR7 galaxies (Omand+, 2014)
The connection between galaxy structure and quenching efficiency.
Omand C.M.B., Balogh M.L., Poggianti B.M.
<Mon. Not. R. Astron. Soc., 440, 843-858 (2014)>
=2014MNRAS.440..843O 2014MNRAS.440..843O
ADC_Keywords: Galaxy catalogs ; Morphology
Keywords: galaxies: evolution - galaxies: structure
Abstract:
Using data from the Sloan Digital Sky Survey (SDSS)-DR7, including
structural measurements from 2D surface brightness fits with gim2d, we
show how the fraction of quiescent galaxies depends on galaxy stellar
mass M*, effective radius Re, fraction of r-band light in the bulge,
B/T, and their status as a central or satellite galaxy at 0.01<z<0.2.
For central galaxies we confirm that the quiescent fraction depends
not only on stellar mass, but also on Re. The dependence is
particularly strong as a function of M*/Reα, with α∼1.5.
This appears to be driven by a simple dependence on B/T over the mass
range 9<log(M*/M☉)<11.5, and is qualitatively similar even if
galaxies with B/T>0.3 are excluded. For satellite galaxies, the
quiescent fraction is always larger than that of central galaxies, for
any combination of M*, Re and B/T. The quenching efficiency is not
constant, but reaches a maximum of ∼0.7 for galaxies with
9<log(M*/M☉)<9.5 and Re<1kpc. This is the same region of
parameter space in which the satellite fraction itself reaches its
maximum value, suggesting that the transformation from an active
central galaxy to a quiescent satellite is associated with a reduction
in Re due to an increase in dominance of a bulge component.
Description:
We draw our sample from the seventh data release of the SDSS.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 178 581994 *GIM2D parameters from matched catalog
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Note on table1.dat: The SIM2D software (Simard et al. 2002ApJS..142....1S 2002ApJS..142....1S)
derive parameters from brightness profile fitting. The data given here
are simply matched entries from the published catalogues of Blanton et al.
(2005AJ....129.2562B 2005AJ....129.2562B), Brinchmann et al. (2004MNRAS.351.1151B 2004MNRAS.351.1151B), Simard et
al. (2011, J/ApJS/196/11), and Yang et al. (2012ApJ...752...41Y 2012ApJ...752...41Y).
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See also:
J/ApJS/196/11 : Bulge+disk decompositions of SDSS galaxies (Simard+, 2011)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- VAGC [1/473805] ID for simple matching with Blanton
et al. (2005AJ....129.2562B 2005AJ....129.2562B) (NYUVAGCID)
8- 14 I7 --- Yang [750/2506744] ID for simple matching with Yang
et al. (2012ApJ...752...41Y 2012ApJ...752...41Y) (Yang_ID)
16- 22 I7 --- Simard [1/1123718] ID for simple matching with Simard
et al. (2011, Cat. J/ApJS/196/11) (Simard_ID)
24- 32 F9.5 deg RAdeg Right ascension (J2000) (RA)
34- 42 F9.5 deg DEdeg Declination (J2000) (DEC)
44- 50 F7.5 --- z [0.01/0.2] Galaxy redshift (z)
52- 59 F8.2 kpc R4 [-131/66] Circularized half-light radius with
n=4 (Recircn4) (1)
61- 67 F7.2 kpc Rc [-131/63] Circularized half-light radius with
free n (Recircfn) (1)
69- 75 F7.2 kpc RSe [-131/53] Circularized half-light radius with
n for the bulge component (RecircSersice) (1)
77- 82 F6.2 kpc Rsma [0/348] Circularized half-light radius with
free n bulge + disc (Resmafn) (1)
84- 87 F4.2 --- B/T4 [0/1] Fraction of bulge light within R4 (BT_n4)
89- 92 F4.2 --- B/Tc [0/1] Fraction of bulge light within Rc (BT_fn)
94- 97 F4.2 --- PpS [0/1] Probability for a pure Sersic model (2)
99-104 F6.2 --- Pn4 [0/1]?=-99.99 Probability for n=4 model (2)
106-110 F5.2 [Msun] logM* [6/12.9]?=-1 Stellar mass from Brinchmann
et al. (2004MNRAS.351.1151B 2004MNRAS.351.1151B) (log_Mstar)
112-117 F6.2 [Msun/yr] logSFR [-99/3.9] SFR from Brinchmann et al.
(2004MNRAS.351.1151B 2004MNRAS.351.1151B) (log_SFR)
119-123 F5.2 mag rmag r-band petrosian magnitude from SDSS (rPetro)
125 I1 --- f1 [1/2] BGG flag (BGG) (3)
127 I1 --- f2 [1/2] MMGG flag (MMGG) (3)
129-133 F5.2 [Msun] logMhLr [11/16]?=0 Halo mass to rank luminosity ratio
(logMhaloLrank)
135-139 F5.2 [Msun] logMhMr [11/16]?=0 Halo mass to rank mass ratio
(logMhaloMrank)
141-144 F4.2 --- edge [0/1] Edge parameter
146-149 F4.2 --- C [0.7/1] Spatial completeness from
Blanton et al. (2005AJ....129.2562B 2005AJ....129.2562B) (NYU_C)
151-154 F4.2 --- ng [0/8] Galaxy Sersic index
156-159 F4.2 --- nb [0/8] Bulge Sersic index
161-165 F5.2 mag rg2d GIM2D B+D model g-band magnitude
167-178 F12.8 10+6Mpc3 Vmax Selection volume based on the absolute
magnitude and Re of the galaxy (Volume)
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Note (1): Circularized half-light radius from bulge/disc decomposition as
in Simard et al. (2011, J/ApJS/196/11) model, with different values of
the Sersic index n.
Note (2): probabilities that a bulge+disk decomposition is not needed versus
a pure Sersic model (PpS), and that a free-n bulge+disk decomposition is
not needed versus a n=4 bulge+disk model (Pn4)
Note (3): indicates whether (1) or not (2) a galaxy is the most luminous in its
halo according to the Yang et al. (2012ApJ...752...41Y 2012ApJ...752...41Y), catalogue galaxies
with a flag of 1 are considered a 'central' in our analysis.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 23-Jan-2015