J/ApJ/776/114 MAGIICAT. I. MgII Absorber-Galaxy Catalog (Nielsen+, 2013)
MAGIICAT.
I. The MgII Absorber-Galaxy Catalog.
Nielsen N.M., Churchill C.W., Kacprzak G.G., Murphy M.T.
<Astrophys. J., 776, 114 (2013)>
=2013ApJ...776..114N 2013ApJ...776..114N
ADC_Keywords: QSOs ; Galaxies, spectra ; Redshifts ; Equivalent widths ;
Magnitudes, absolute
Keywords: galaxies: halos; quasars: absorption lines
Abstract:
We describe the MgII Absorber-Galaxy Catalog, MAGIICAT, a compilation
of 182 spectroscopically identified intermediate redshift
(0.07≤z≤1.1) galaxies with measurements of MgII
λλ2796,2803 absorption from their circumgalactic medium
within projected distances of 200kpc from background quasars. In this
work, we present "isolated" galaxies, which are defined as having no
spectroscopically identified galaxy within a projected distance of
100kpc and a line of sight velocity separation of 500km/s. We
standardized all galaxy properties to the ΛCDM cosmology and
galaxy luminosities, absolute magnitudes, and rest-frame colors to the
B- and K-band on the AB system. We present galaxy properties and
rest-frame MgII equivalent width, Wr(2796), versus galaxy redshift.
The well-known anti-correlation between Wr(2796) and quasar-galaxy
impact parameter, D, is significant to the 8σ level. The mean
color of MAGIICAT galaxies is consistent with an Sbc galaxy for all
redshifts. We also present B- and K-band luminosity functions for
different Wr(2796) and redshift subsamples: "weak absorbing"
[Wr(2796)<0.3Å], "strong absorbing" [Wr(2796)≥0.3Å], low
redshift (z<), and high redshift (z≥), where = 0.359 is
the median galaxy redshift. Rest-frame color B-K correlates with MK
at the 8σ level for the whole sample but is driven by the strong
absorbing, high-redshift subsample (6σ). Using MK as a proxy
for stellar mass and examining the luminosity functions, we infer that
in lower stellar mass galaxies, MgII absorption is preferentially
detected in blue galaxies and the absorption is more likely to be
weak.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 110 182 Observed galaxy properties
table3.dat 138 182 Calculated galaxy and absorption properties
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See also:
J/A+A/546/A67 : Catalog of strong MgII absorbers (Lawther+, 2012)
J/ApJ/754/38 : MgII absorption systems for FSRQs (Chand+, 2012)
J/ApJ/748/131 : MgII absorbers in SDSS-DR7 quasar catalog (Shen+, 2012)
J/ApJ/727/47 : The MgII cross-section of red galaxies (Bowen+, 2011)
J/ApJ/724/L176 : MgII absorbing gas around galaxies (Chen+, 2010)
J/ApJ/714/1521 : Spectroscopy of galaxies around distant QSOs (Chen+, 2010)
J/ApJ/698/819 : MgII and LRGs cross-correlation analysis (Lundgren+, 2009)
J/ApJ/679/239 : Associated MgII absorbers (Vanden+, 2008)
J/ApJ/660/1093 : Weak MgII absorbers at 0.4<z<2.4 (Narayanan+, 2007)
J/ApJ/639/766 : SDSS-DR3 strong MgII absorbers (Prochter+, 2006)
J/MNRAS/371/495 : Catalog of 1806 MgII absorbers from SDSS DR3 (Bouche+, 2006)
J/MNRAS/354/L25 : MgII absorbers in SDSS QSOs (Bouche+, 2004)
J/A+A/410/33 : MgII/FeII absorbers in 2dF-quasar survey (Menard+, 2003)
J/ApJ/559/654 : Lyα absorption systems. V. (Chen+, 2001)
J/ApJ/498/77 : Lyα absorption systems. III. (Chen+, 1998)
J/ApJ/480/568 : RK photometry in 3C 336 field (Steidel+ 1997)
J/AJ/106/848 : QSO MgII absorption line systems (Drinkwater+, 1993)
http://astronomy.nmsu.edu/cwc/Group/magiicat/ : MAGIICAT home page
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- QSO QSO identifier
11- 30 A20 --- JName QSO identifier, based on J2000 position
32- 38 F7.5 --- zgal [0.07/1.2] Galaxy spectroscopic redshift
40- 45 F6.1 arcsec oRA ?=9999 QSO-galaxy Right Ascension offset
47- 52 F6.1 arcsec oDE ?=9999 QSO-galaxy Declination offset
54- 58 F5.2 arcsec theta [1/55] QSO-galaxy angular separation θ
60- 61 I2 --- r_theta Galaxy reference for previous 3 columns (G1)
63- 67 F5.2 mag Bmag [16.2/24.6] Apparent magnitude in BBand to
get MB
69- 79 A11 --- n_Bmag B magnitude band and type (1)
81- 82 I2 --- r_Bmag Reference for previous 2 columns (G1)
84- 90 F7.2 mag Kmag [12.9/22.6]?=9999 Apparent magnitude in
KBand to get MK
92- 99 A8 --- n_Kmag K magnitude band and type (1)
101-104 I4 --- r_Kmag ?=9999 Reference for previous 2 columns (G1)
106-110 A5 --- MType Galaxy Spectral Energy Distribution (2)
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Note (1): (AB) AB magnitude and (V) Vega magnitude.
Note (2): (Sbc) = No color information; Sbc used.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- QSO QSO identifier
11- 30 A20 --- JName QSO identifier, based on J2000 position
32- 38 F7.5 --- zgal [0.07/1.2] Galaxy spectroscopic redshift
40- 47 F8.6 --- zabs [0.07/1.2] Redshift from MgII absorption
49 A1 --- l_EW Limit flag on EW
50- 55 F6.4 0.1nm EW [0.003/4.5] MgII 2796 absorption equivalent
width (Å)
57- 61 F5.3 0.1nm e_EW [0.001/0.3]? Uncertainty in EW
63- 70 F8.3 --- DR [0.9/2.5]?=9999 MgII doublet ratio
72- 79 F8.3 --- e_DR ?=9999 Uncertainty in DR
81- 82 I2 --- Ref Reference for previous 5 columns (G1)
84- 88 F5.1 kpc D [5.4/193.5] QSO-galaxy impact parameter
90- 94 F5.2 --- KB [-1.6/2.2] K-correction used to obtain BMag
96-101 F6.2 mag BMag [-23.2/-16.1] Absolute B band AB magnitude
103-106 F4.2 --- LB [0.02/5.9] B band luminosity relative to an
L* galaxy
108-114 F7.2 --- KK [-1/1.7]?=9999 K-correction used to obtain KMag
116-122 F7.2 mag KMag [-25.4/-16.9]?=9999 Absolute K band AB magnitude
124-130 F7.2 --- LK [0/9.8]?=9999 K band luminosity relative to an
L* galaxy
132-138 F7.2 mag B-K [0.03/4.1]?=9999 Rest-frame (B-K) color index
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Global Notes:
Note (G1): Reference as follows:
1 = Guillemin & Bergeron (1997A&A...328..499G 1997A&A...328..499G);
2 = Churchill et al. (Churchill, C. W., Kacprzak, G. G., Nielsen, N. M.,
Steidel, C. C., & Murphy, M. T. 2013, ApJ, submitted);
3 = Kacprzak et al. (2011MNRAS.416.3118K 2011MNRAS.416.3118K);
4 = Steidel et al. (1997, J/ApJ/480/568);
5 = Chen & Tinker (2008ApJ...687..745C 2008ApJ...687..745C);
6 = Chen et al. (2010, J/ApJ/714/1521);
7 = Steidel, Dickinson, & Persson (1994ApJ...437L..75S 1994ApJ...437L..75S);
8 = Steidel-PC (C. C. Steidel; 1996, private communication);
9 = Kacprzak, Murphy, & Churchill (2010MNRAS.406..445K 2010MNRAS.406..445K);
10 = Kacprzak et al. (2011ApJ...733..105K 2011ApJ...733..105K)
11 = Gauthier & Chen (2011MNRAS.418.2730G 2011MNRAS.418.2730G)
12 = Barton & Cooke (2009AJ....138.1817B 2009AJ....138.1817B)
13 = Chen et al. (2001, J/ApJ/559/654)
14 = NED/SDSS
15 = NED/2MASS
16 = David Law, personal communication.
17 = Evans, J. L. (2011, Ph.D. thesis , New Mexico State Univ);
18 = This work.
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History:
From electronic version of the journal
References:
Nielsen et al. Paper II. 2013ApJ...776..115N 2013ApJ...776..115N
Churchill et al. Paper III. 2013ApJ...779...87C 2013ApJ...779...87C
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 24-Mar-2015