J/A+A/501/461 Photometric masses of early-type lens galaxies (Grillo+, 2009)
Photometric mass and mass decomposition in early-type lens galaxies.
Grillo C., Gobat R., Lombardi M., Rosati P.
<Astron. Astrophys., 501, 461-474 (2009)>
=2009A&A...501..461G 2009A&A...501..461G
ADC_Keywords: Gravitational lensing ; Redshifts ; Photometry, SDSS
Keywords: galaxies: elliptical and lenticular, cD - galaxies: formation -
galaxies: evolution - gravitational lensing - cosmology: observations
Abstract:
The largest spectroscopically selected sample of strong gravitational
lens systems presented and analyzed to date is that of the Sloan Lens
ACS (SLACS) survey. For the 57 massive early-type lens galaxies in the
sample, photometric and spectroscopic measurements are available from
the Sloan Digital Sky Survey (SDSS).
By using the SDSS multicolor photometry and lens modeling, we study
stellar-mass properties and the luminous and dark matter composition
of the early-type lens galaxies in the sample.
Description:
We fit the lens spectral energy distributions (SEDs) consisting of
ugriz magnitudes with a three-parameter grid (age, star-formation
timescale, and photometric mass) of Bruzual & Charlot's
(2003MNRAS.344.1000B 2003MNRAS.344.1000B) and Maraston's (2005MNRAS.362..799M 2005MNRAS.362..799M) composite
stellar-population models, computed by adopting solar metallicity and
various initial mass functions (IMFs). We also utilize the best-fit
parameters derived from the lens models of the total projected mass
enclosed within the disk defined by the Einstein radius of each
system.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 97 57 The relevant spectroscopic and photometric
measurements of the 57 early-type grade-A lens
galaxies of the SLACS survey
table4.dat 92 57 The photometric and lensing mass measurements of
the 57 early-type grade-A lens galaxies of
the SLACS survey
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See also:
J/ApJ/682/964 : Sloan lens ACS survey. V. (Bolton+, 2008)
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- 10 A10 --- SLACS System name (JHHMM+DDMM)
12- 16 F5.3 --- zl Lens redshift
18- 22 F5.3 --- zs Source redshift
24- 27 F4.2 arcsec thetaE Einstein angle of the lensing systems
29- 32 F4.2 arcsec thetae Effective angle of the lensing systems
34- 39 F6.3 mag umag SDSS u magnitude (1)
41- 45 F5.3 mag e_umag rms uncertainty on umag
47- 52 F6.3 mag gmag SDSS g magnitude (1)
54- 58 F5.3 mag e_gmag rms uncertainty on gmag
60- 65 F6.3 mag rmag SDSS r magnitude (1)
67- 71 F5.3 mag e_rmag rms uncertainty on rmag
73- 78 F6.3 mag imag SDSS i magnitude (1)
80- 84 F5.3 mag e_imag rms uncertainty on imag
86- 91 F6.3 mag zmag SDSS u magnitude (1)
93- 97 F5.3 mag e_zmag rms uncertainty on imag
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Note (1): Magnitudes are extinction-corrected modelMag (AB) from the SDSS.
References: Bolton et al. (2008, Cat. J/ApJ/682/964).
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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- 10 A10 --- SLACS System name (JHHMM+DDMM)
12- 14 I3 10+10solMass MSalBC Photometric mass from Sal,BC model (1)
16- 17 I2 10+10solMass E_MSalBC Error on MSalBC (upper limit)
19- 20 I2 10+10solMass e_MSalBC Error on MSalBC (lower limit)
22- 24 I3 10+10solMass MSalM Photometric mass from Sal,M model (1)
26- 27 I2 10+10solMass E_MSalM Error on MSalM (upper limit)
29- 30 I2 10+10solMass e_MSalM Error on MSalM (lower limit)
32- 33 I2 10+10solMass MChaBC Photometric mass from Cha,BC model (1)
35- 36 I2 10+10solMass E_MChaBC Error on MChaBC (upper limit)
38- 39 I2 10+10solMass e_MChaBC Error on MChaBC (lower limit)
41- 42 I2 10+10solMass MKroM Photometric mass from Kro,M model (1)
44- 45 I2 10+10solMass E_MKroM Error on MKroM (upper limit)
47- 48 I2 10+10solMass e_MKroM Error on MKroM (lower limit)
50- 53 F4.2 --- fap Aperture factor
55- 56 I2 10+10solMass MSalBC2 Photometric mass from Sal,BC model,
for R≤REin (1)
58- 59 I2 10+10solMass E_MSalBC2 Error on MSalBC2 (upper limit)
61- 62 I2 10+10solMass e_MSalBC2 Error on MSalBC2 (lower limit)
64- 65 I2 10+10solMass MSalM2 Photometric mass from Sal,M model
for R≤REin (1)
67- 68 I2 10+10solMass E_MSalM2 Error on MSalM2 (upper limit)
70- 71 I2 10+10solMass e_MSalM2 Error on MSalM2 (lower limit)
73- 74 I2 10+10solMass MChaBC2 Photometric mass from Cha,BC model
for R≤REin (1)
76 I1 10+10solMass E_MChaBC2 Error on MChaBC2 (upper limit)
78 I1 10+10solMass e_MChaBC2 Error on MChaBC2 (lower limit)
80- 81 I2 10+10solMass MKroM2 Photometric mass from Kro,M model
for R≤REin (1)
83- 84 I2 10+10solMass E_MKroM2 Error on MKroM2 (upper limit)
86- 87 I2 10+10solMass e_MKroM2 Error on MKroM2 (lower limit)
89- 90 I2 10+10solMass Mtotlen Total mass from gravitational lensing
for R≤REin
92 I1 10+10solMass e_Mtotlen rms uncertainty on Mtotlen
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Note (1): Models are:
Sal,BC = Salpeter (1955ApJ...121..161S 1955ApJ...121..161S) IMF,
Bruzual & Charlot (2003MNRAS.344.1000B 2003MNRAS.344.1000B) model
Sal,M = Salpeter (1955ApJ...121..161S 1955ApJ...121..161S) IMF,
Maraston (2005MNRAS.362..799M 2005MNRAS.362..799M) model
Cha,BC = Chabrier (2003PASP..115..763C 2003PASP..115..763C) IMF,
Bruzual & Charlot (2003MNRAS.344.1000B 2003MNRAS.344.1000B) model
Kro,M = Kroupa (2001MNRAS.322..231K 2001MNRAS.322..231K) IMF,
Maraston (2003MNRAS.344.1000B 2003MNRAS.344.1000B) model
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 31-Aug-2009