J/PASP/122/1397 Spitzer Survey of Stellar Structure in Galaxies (Sheth+, 2010)
The Spitzer Survey of Stellar Structure in Galaxies (S4G).
Sheth K., Regan M., Hinz J.L., De Paz A.G., Menendez-Delmestre K.,
Munoz-Mateos J.-C., Seibert M., Kim T., Laurikainen E., Salo H.,
Gadotti D.A., Laine J., Mizusawa T., Armus L., Athanassoula E., Bosma A.,
Buta R.J., Capak P., Jarrett T.H., Elmegreen D.M., Elmegreen B.G.,
Knapen J.H., Koda J., Helou G., Ho L.C., Madore B.F., Masters K.L.,
Mobasher B., Ogle P., Peng C.Y., Schinnerer E., Surace J.A., Zaritsky D.,
Comeron S., De Swardt B., Meidt S.E., Kasliwal M., Aravena M.
<Publ. Astron. Soc. Pac., 122, 1397-1414 (2010)>
=2010PASP..122.1397S 2010PASP..122.1397S
ADC_Keywords: Surveys ; Galaxy catalogs ; Morphology
Abstract:
The Spitzer Survey of Stellar Structure in Galaxies (S4G) is an
Exploration Science Legacy Program approved for the Spitzer
post-cryogenic mission. It is a volume-, magnitude-, and
size-limited (d<40Mpc, |b|>30°, mBcorr<15.5, and D25>1')
survey of 2331 galaxies using the Infrared Array Camera (IRAC) at 3.6
and 4.5um. Each galaxy is observed for 240s and mapped to ≥1.5D25.
The final mosaicked images have a typical 1sigma rms noise level of
0.0072 and 0.0093MJy/sr at 3.6 and 4.5um, respectively. Our
azimuthally averaged surface brightness profile typically traces
isophotes at µ3.6um(AB)(1sigma)∼27mag/arcsec2, equivalent to
a stellar mass surface density of ∼1M☉/pc2. thus provides an
unprecedented data set for the study of the distribution of mass and
stellar structures in the local universe. This large, unbiased, and
extremely deep sample of all Hubble types from dwarfs to spirals to
ellipticals will allow for detailed structural studies, not only as
a function of stellar mass, but also as a function of the local
environment.
This article introduces the survey and describes the sample selection,
the significance of the 3.6 and 4.5um bands for this study, and the
data collection and survey strategies.
Description:
We chose all galaxies with radial velocity Vradio<3000km/s
(corresponding to a distance d<40Mpc for a Hubble constant of
75km/s/Mpc), total corrected blue magnitude mBcorr<15.5, blue light
isophotal angular diameter D25>1.0' at Galactic latitude |b|>30 °
using HyperLEDA (Paturel et al. 2003, Cat. VII/237, VII/238).
The version 2.0 (2013-09) of the S4G contains 2352 galaxies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 56 2331 *RC3-like parameters for galaxies
s4g.dat 156 2352 S4G catalog Version 2 (2013-09)
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Note on table1.dat: All properties obtained from the HyperLEDA database
(http://leda.univ-lyon1.fr/)
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See also:
http://irsa.ipac.caltech.edu/data/SPITZER/S4G/ : S4G at IPAC
J/A+A/562/A121 : ARRAKIS: Atlas of Resonance Rings as Known In S4G
(Comeron+, 2014)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Galaxy name
15- 22 F8.5 h RAhour Right ascension in decimal hours (J2000)
24- 32 F9.5 deg DEdeg Declination in decimal degrees (J2000)
34- 38 F5.1 --- TType T morphological type code (1)
40- 45 F6.2 mag BMAG ?=-99 Absolute B magnitude
47- 50 F4.2 [0.1arcmin] log(D25) Apparent major axis diameter at
25mag/arcsec2
52- 56 F5.2 mag Bmag Total apparent corrected B magnitude,
corrected for inclination, Galactic
extinction, and K-correction
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Note (1): Morphological type code is
-5=E, -3=E-S0, 0=S0a , 3=Sb, 7=Sd, and 10=Irr
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Byte-by-byte Description of file: s4g.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Galaxy name
14- 22 F9.5 deg RAdeg Right ascension (J2000)
24- 32 F9.5 deg DEdeg Declination (J2000)
35- 39 F5.1 arcsec amaj ? Semi-major axis at level
µ(3.6um)=25.5mag(AB)/arcsec2
41- 46 F6.1 deg PA [-160/90]? Position angle of major axis
48- 52 F5.3 --- ell [0/1]? Ellipticity (1-b/a)
54- 59 F6.3 mag [3.6] ? Spitzer/IRAC 3.6um asymptotic magnitude (AB)
62- 66 F5.3 mag e_[3.6] ? Mean error on [3.6]
68- 73 F6.3 mag [4.5] ? Spitzer/IRAC 4.5um asymptotic magnitude (AB)
76- 80 F5.3 mag e_[4.5] ? Growth-curve fitting error in [4.5]
82- 87 F6.3 --- c31 [1/]? r(75%)/r(25%) concentration index
at 3.6um
89- 94 F6.3 --- c42 ? 5*log10(r(80%)/r(20%)) concentration index
at 3.6um
96-102 F7.3 mag M3.6 ? Absolute magnitude at 3.6um
104-110 F7.3 mag M4.5 ? Absolute magnitude at 4.5um
113-118 F6.3 [Msun] logM* ? Stellar mass
120-126 F7.3 Mpc Dmean ? Mean redshift-independent distance
129-134 F6.3 Mpc e_Dmean ? Standard deviation of Dmean
136-139 F4.1 -- TT ? Morphological type code
141-143 F3.1 -- e_TT ? Error on TT
145-151 F7.1 km/s Vr ? Heliocentric radial velocity from
radio measurement
153-156 F4.1 km/s e_Vr ? Mean error on Vr
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History:
* 06-May-2011: From electronic version of the journal
* 23-Jul-2012: Units of RA corrected into hours (instead of degrees)
* 22-Jul-2014: Added file "s4g.dat", thanks to S. Cameron
(End) Patricia Vannier [CDS] 24-Mar-2011