J/ApJ/698/819 MgII and LRGs cross-correlation analysis (Lundgren+, 2009)
A cross-correlation analysis of Mg II absorption line systems and luminous red
galaxies from the SDSS DR5.
Lundgren B.F., Brunner R.J., York D.G., Ross A.J., Quashnock J.M.,
Myers A.D., Schneider D.P., Alsayyad Y., Bahcall N.
<Astrophys. J., 698, 819-839 (2009)>
=2009ApJ...698..819L 2009ApJ...698..819L
ADC_Keywords: Galaxies, spectra ; QSOs ; Redshifts ; Equivalent widths ; Surveys
Keywords: quasars: general
Abstract:
We analyze the cross-correlation of MgII(λ2796, 2803) quasar
absorption systems with luminous red galaxies (LRGs) from the Fifth
Data Release (DR5) of the Sloan Digital Sky Survey. The absorption
line sample consists of 2705 unambiguously intervening MgII absorption
systems, detected at a 4σ level, covering a redshift range
(0.36≤zabs≤0.8) and a rest equivalent-width range of
0.8Å≤Wλ2796r≤5.0Å. We cross-correlate these
absorbers with 1495604 LRGs with accurate photometric redshifts in the
same redshift range and examine the relationship of MgII equivalent
width and clustering amplitude.
Description:
The data for this paper have been drawn from the Fifth Data Release
(DR5) of the SDSS (Adelman-McCarthy et al. 2007, Cat. II/276;
superseded by II/294). Through 2005 June, the SDSS had imaged
≳8000deg2 and obtained follow-up spectra for nearly 7x105
galaxies and 8x104 quasars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 87 3469 Catalog of selected SDSS DR5 MgII systems
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See also:
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 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/MNRAS/380/1608 : LRG catalog (Lopes+, 2007)
J/MNRAS/375/68 : MegaZ-LRG catalogue (Collister+, 2007)
J/ApJ/639/766 : SDSS-DR3 strong MgII absorbers (Prochter+, 2006)
J/MNRAS/371/495 : Catalogue of 1806 MgII absorbers from SDSS DR3 (Bouche+,
2006)
J/MNRAS/372/425 : 2dF-SDSS Luminous Red Galaxy Survey, 2SLAQ (Cannon+, 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/AJ/106/848 : QSO MgII absorption line systems (Drinkwater+, 1993)
http://www.sdss.org/ : Sloan Digital Sky Survey (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- 9 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000)
11- 22 F12.8 deg DEdeg Declination in decimal degrees (J2000)
24- 29 F6.4 --- zMgII Redshift from MgIIλ2796 line
31- 35 F5.3 --- zQSO SDSS QSO redshift
37- 41 F5.2 0.1nm W2796 MgII2796 rest equivalent width in Angstroms
43- 47 F5.2 --- S/N(W) Ratio of W2796 to its error
49- 52 F4.2 --- DR MgII doublet ratio (1)
54- 57 F4.2 --- e_DR Error in DR
59- 64 F6.3 --- beta The β absorber velocity parameter (2)
66- 70 F5.2 mag imag SDSS i'-band AB magnitude
72- 75 I4 --- Plate SDSS plate number (3)
77- 79 I3 --- Fiber SDSS fiber number
81- 85 I5 d MJD Modified Julian Date
87 A1 --- Q [ABC] Absorption system grade (4)
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Note (1): Represents the measured ratio of line strengths for each observed
MgII doublet, Wrλ2796/Wrλ2803.
Note (2): Measurements of absorber velocities in the quasar rest frame are
commonly described using the dimensionless quantity, β, where
β=ν/c=([(1+zqso)/(1+zabs)]2-1)/([(1+zqso)/(1+zabs)]2+1)
See sections 2.3 and 5.1 for further details.
Note (3): Table sorted by SDSS plate number. Included absorbers have
Wrλ2796≥0.8 Angstroms, imag≤19.5,
zMgII≤0.8, seeing <1.5" and reddening <0.2.
Note (4): Grade as follows:
A = Systems with at least four lines with confident detections;
B = Systems with three confident line identifications.
C = Systems with two lines, which are generally MgII doublets or CIV doublets.
The automated process used to identify and grade absorption systems is
detailed extensively in D. G. York et al. (2009, in preparation). See
section 2.2 for further details.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 07-Jun-2011