J/ApJ/705/1099 The Sloan Lens ACS (SLACS) Survey. IX. (Auger+, 2009)
The Sloan Lens ACS Survey.
IX. Colors, lensing, and stellar masses of early-type galaxies.
Auger M.W., Treu T., Bolton A.S., Gavazzi R., Koopmans L.V.E.,
Marshall P.J., Bundy K., Moustakas L.A.
<Astrophys. J., 705, 1099-1115 (2009)>
=2009ApJ...705.1099A 2009ApJ...705.1099A
ADC_Keywords: Gravitational lensing ; Galaxies, optical ; Photometry, HST ;
Redshifts ; Surveys ; Morphology
Keywords: galaxies: elliptical and lenticular, cD - gravitational lensing -
surveys
Abstract:
We present the current photometric data set for the Sloan Lens ACS
(SLACS) Survey, including Hubble Space Telescope (HST) photometry from
Advanced Camera for Surveys, WFPC2, and NICMOS. These data have
enabled the confirmation of an additional 15 grade "A" (certain) lens
systems, bringing the number of SLACS grade "A" lenses to 85;
including 13 grade "B" (likely) systems, SLACS has identified nearly
100 lenses and lens candidates. Approximately 80% of the grade "A"
systems have elliptical morphologies while ∼10% show spiral structure;
the remaining lenses have lenticular morphologies. Spectroscopic
redshifts for the lens and source are available for every system,
making SLACS the largest homogeneous data set of galaxy-scale lenses
to date. The ensemble properties of the SLACS lens galaxies, e.g.,
stellar masses and projected ellipticities, appear to be
indistinguishable from other SDSS galaxies with similar stellar
velocity dispersions. This further supports that SLACS lenses are
representative of the overall population of massive early-type
galaxies with M*≳1011M☉, and are therefore an ideal data
set to investigate the kpc-scale distribution of luminous and dark
matter in galaxies out to z∼0.5.
Description:
A campaign was initiated to obtain HST multi-band imaging in V, I, and
H (F555W, F814W, and F160W) for all of the confirmed SLACS lenses and
a small number of high-probability lens candidates from Paper V
(Bolton et al., 2008, Cat. J/ApJ/682/964) using the ACS WFC and NICMOS
NIC2 cameras (Programs 10494, 10798, and 11202; PI: Koopmans).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 59 12 New SLACS targets
table3.dat 105 85 Photometric and spectroscopic properties of
SLACS lenses
table4.dat 120 85 Lensing and stellar population properties of
SLACS lenses
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See also:
B/hst : HST Archived Exposures Catalog (STScI, 2007)
J/ApJ/690/670 : The Sloan lens ACS Survey. VIII. (Treu+, 2009)
J/A+A/501/461 : Photometric masses of early-type lens galaxies (Grillo+, 2009)
J/ApJ/682/964 : Sloan lens ACS survey. V. (Bolton+, 2008)
J/ApJS/176/19 : COSMOS: strong lens systems (Faure+, 2008)
J/ApJ/668/643 : Multiply imaged gravitational lens systems (Limousin+, 2007)
J/ApJ/600/L155 : Gravitational lens in GOODS ACS fields (Fassnacht+, 2004)
http://www.slacs.org/ : SLACS home page
http://www.sdss.org/ : SDSS home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [SDSS]
5- 14 A10 --- SDSS SLACS SDSS name (JHHMM+DDMM)
16- 17 I2 h RAh Hour of right ascension (J2000)
19- 20 I2 min RAm Minute of right ascension (J2000)
22- 26 F5.2 s RAs Second of right ascension (J2000)
28 A1 --- DE- Sign of declination (J2000)
29- 30 I2 deg DEd Degree of declination (J2000)
32- 33 I2 arcmin DEm Arcminute of declination (J2000)
35- 38 F4.1 arcsec DEs Arcsecond of declination (J2000)
40- 44 F5.3 --- zFG Foreground source redshift
46- 50 F5.3 --- zBG Background source redshift
52- 54 I3 km/s sigma Velocity dispersion
56- 57 I2 km/s e_sigma rms uncertainty on sigma
59 A1 --- Grade [ABX] Grade (A: confirmed lenses; B: probable
lenses; X: unlikely lenses)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- --- [SDSS]
5- 14 A10 --- SDSS SLACS SDSS name (JHHMM+DDMM)
16- 17 I2 h RAh Hour of right ascension (J2000)
19- 20 I2 min RAm Minute of right ascension (J2000)
22- 26 F5.2 s RAs Second of right ascension (J2000)
28 A1 --- DE- Sign of declination (J2000)
29- 30 I2 deg DEd Degree of declination (J2000)
32- 33 I2 arcmin DEm Arcminute of declination (J2000)
35- 38 F4.1 arcsec DEs Arcsecond of declination (J2000)
40- 44 F5.3 --- zlens Lens redshift
46- 50 F5.3 --- zsrc Source redshift
52- 54 I3 km/s sigma Lensing galaxy velocity dispersion
56- 57 I2 km/s e_sigma rms uncertainty on sigma
59- 63 A5 --- MType Morphological type
64 A1 --- f_MType [c] c: the lens galaxy has at least one close
companion galaxy
66- 70 F5.2 mag Bmag ? HST/ACS B-band magnitude (F435W)
72- 75 F4.2 arcsec Re(B) ? Effective radius (measured at the
intermediate axis) in B-band
77- 81 F5.2 mag Vmag ? HST V-band magnitude (F555W or F606W)
83 A1 --- f_Vmag [ab]? a: F606W filter on WFPC2 or
b: F555W filter on ACS
85- 88 F4.2 arcsec Re(V) ? Effective radius (measured at the
intermediate axis) in V-band
90- 94 F5.2 mag Imag ? HST/ACS I-band magnitude (F814W)
96- 99 F4.2 arcsec Re(I) ? Effective radius (measured at the
intermediate axis) in I-band
101-105 F5.2 mag Hmag ? HST/NICMOS H-band magnitude (F160W)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [SDSS]
5- 14 A10 --- SDSS SLACS SDSS name (JHHMM+DDMM)
16- 19 F4.2 kpc RE ? Einstein radius
21- 25 F5.2 [Msun] Mass ? Log of mass within the Einstein radius
27- 30 F4.2 --- Fc ? The stellar fraction within the Einstein radius
for Chabrier IMF (fChab*,Ein)
32- 35 F4.2 --- e_Fc ? Fc uncertainty
37- 40 F4.2 --- Fs ? The stellar fraction within the Einstein radius
for Salpeter IMF (f^Salp*,Ein)
42- 45 F4.2 --- e_Fs ? Fs uncertainty
47- 50 F4.2 --- F ? Ratio of the stellar fraction within the
Einstein radius to the stellar fraction within
the effective radius (f*,Ein/f*,eff)
52- 56 F5.2 [Msun] logMc ? Stellar mass estimate from Chabrier IMF
58- 61 F4.2 [Msun] e_logMc ? Mc uncertainty
63- 67 F5.2 [Msun] logMs ? Stellar mass estimate from Salpeter IMF
69- 72 F4.2 [Msun] e_logMs ? Ms uncertainty
74- 79 F6.2 mag BMag ? Absolute rest-frame Johnson B-band AB magnitude
81- 84 F4.2 mag e_BMag ? BMag uncertainty
86- 91 F6.2 mag VMag ? Absolute rest-frame Johnson V-band AB magnitude
93- 96 F4.2 mag e_VMag ? VMag uncertainty
98-103 F6.2 mag BMag0 ? BMag with composite stellar population (CSP)
model at z=0 (1)
105-108 F4.2 mag e_BMag0 ? BMag0 uncertainty
110-115 F6.2 mag VMag0 ? VMag with composite stellar population (CSP)
model at z=0 (1)
117-120 F4.2 mag e_VMag0 ? VMag0 uncertainty
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Note (1): BMag and VMag are rest-frame Johnson B and V AB magnitudes
inferred from our CSP modeling. BMag0 and VMag0 are the same, except
the CSP models have been evolved to z=0 (the ages have been increased
by the amount of cosmic time between the redshift of the galaxy and
z=0, and the CSP models are re-evaluated with these new ages).
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History:
From electronic version of the journal
References:
Bolton et al. Paper I. 2006ApJ...638..703B 2006ApJ...638..703B
Treu et al. Paper II. 2006ApJ...640..662T 2006ApJ...640..662T
Koopmans et al. Paper III. 2006ApJ...649..599K 2006ApJ...649..599K
Gavazzi et al. Paper IV. 2007ApJ...667..176G 2007ApJ...667..176G
Bolton et al. Paper V. 2008ApJ...682..964B 2008ApJ...682..964B Cat. J/ApJ/682/964
Gavazzi et al. Paper VI. 2008ApJ...677.1046G 2008ApJ...677.1046G
Bolton et al. Paper VII. 2008ApJ...684..248B 2008ApJ...684..248B
Treu et al. Paper VIII. 2009ApJ...690..670T 2009ApJ...690..670T Cat. J/ApJ/690/670
Auger et al. Paper X. 2010ApJ...724..511A 2010ApJ...724..511A
Newton et al. Paper XI. 2011ApJ...734..104N 2011ApJ...734..104N
Shu et al. Paper XII. 2015ApJ...803...71S 2015ApJ...803...71S
Shu et al. Paper XIII. 2017ApJ...851...48S 2017ApJ...851...48S Cat. J/ApJ/851/48
(End) Emmanuelle Perret [CDS] 05-Dec-2011