THE RADIAL AND AZIMUTHAL PROFILES OF MgII ABSORPTION AROUND 0.5 < z < 0.9 zCOSMOS GALAXIES OF DIFFERENT COLORS, MASSES, AND ENVIRONMENTS

被引：264

作者：

Bordoloi, R. ^{[1
]}

Lilly, S. J. ^{[1
]}

Knobel, C. ^{[1
]}

Bolzonella, M. ^{[2
]}

Kampczyk, P. ^{[1
]}

Carollo, C. M. ^{[1
]}

Iovino, A. ^{[3
]}

Zucca, E. ^{[2
]}

Contini, T. ^{[4
,5
]}

Kneib, J-P. ^{[6
]}

Le Fevre, O. ^{[6
]}

Mainieri, V. ^{[7
]}

Renzini, A. ^{[8
]}

Scodeggio, M. ^{[9
]}

Zamorani, G. ^{[2
]}

Balestra, I. ^{[10
]}

Bardelli, S. ^{[2
]}

Bongiorno, A. ^{[10
]}

Caputi, K. ^{[11
]}

Cucciati, O. ^{[12
]}

de la Torre, S. ^{[11
]}

de Ravel, L. ^{[11
]}

Garilli, B. ^{[6
,9
]}

Kovac, K. ^{[1
,13
]}

Lamareille, F. ^{[4
,5
]}

Le Borgne, J-F. ^{[4
,5
]}

Le Brun, V. ^{[6
]}

Maier, C. ^{[1
]}

Mignoli, M. ^{[2
]}

Pello, R. ^{[4
,5
]}

Peng, Y. ^{[1
]}

Perez Montero, E. ^{[4
,5
,14
]}

Presotto, V. ^{[3
]}

Scarlata, C. ^{[15
]}

Silverman, J. ^{[16
]}

Tanaka, M. ^{[16
]}

Tasca, L. ^{[6
]}

Tresse, L. ^{[6
]}

Vergani, D. ^{[2
]}

Barnes, L. ^{[1
]}

Cappi, A. ^{[2
]}

Cimatti, A. ^{[17
]}

Coppa, G. ^{[10
]}

Diener, C. ^{[1
]}

Franzetti, P. ^{[9
]}

Koekemoer, A. ^{[18
]}

Lopez-Sanjuan, C. ^{[6
]}

McCracken, H. J. ^{[19
]}

Moresco, M. ^{[17
]}

Nair, P. ^{[2
]}

机构：

[1] ETH, Inst Astron, CH-8093 Zurich, Switzerland

[2] INAF Osservatorio Astron Bologna, Bologna, Italy

[3] INAF Osservatorio Astron Brera, Milan, Italy

[4] CNRS, Inst Rech Astrophys & Planetol, F-31400 Toulouse, France

[5] Univ Toulouse, IRAP, UPS OMP, Toulouse, France

[6] Aix Marseille Univ, CNRS, Lab Astrophys Marseille, F-13388 Marseille 13, France

[7] European So Observ, D-85741 Garching, Germany

[8] Univ Padua, Dipartimento Astron, I-35122 Padua, Italy

[9] INAF IASF, Milan, Italy

[10] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany

[11] Univ Edinburgh, Royal Observ, SUPA, Edinburgh EH9 1BD, Midlothian, Scotland

[12] INAF Osservatorio Astron Trieste, Trieste, Italy

[13] Max Planck Inst Astrophys, D-85741 Garching, Germany

[14] CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain

[15] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA

[16] Univ Tokyo, IPMU, Kashiwa, Chiba 2778568, Japan

[17] Univ Bologna, Dipartimento Astron, Bologna, Italy

[18] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[19] Univ Paris 06, CNRS, UMR7095, Inst Astrophys Paris, F-75014 Paris, France

[20] Univ Calif Santa Cruz, Dept Astron & Astrophys, UCO Lick Observ, Santa Cruz, CA 95064 USA

[21] CNRS, Inst Astrophys Spatiale, F-91405 Orsay, France

[22] Univ Paris 11, F-91405 Orsay, France

来源：

ASTROPHYSICAL JOURNAL | 2011年 / 743卷 / 01期

基金：

瑞士国家科学基金会;

关键词：

galaxies: evolution; galaxies: groups: general; galaxies: high-redshift; intergalactic medium; ISM: jets and outflows; quasars: absorption lines; HUBBLE-SPACE-TELESCOPE; II ABSORPTION; PHOTOMETRIC REDSHIFTS; LINE SYSTEMS; QSO-SPECTRA; HALO GAS; ABSORBERS; COSMOS; KINEMATICS; EVOLUTION;

D O I：

10.1088/0004-637X/743/1/10

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We map the radial and azimuthal distribution of MgII gas within similar to 200 kpc (physical) of similar to 4000 galaxies at redshifts 0.5 < z < 0.9 using co-added spectra of more than 5000 background galaxies at z > 1. We investigate the variation of Mg II rest-frame equivalent width (EW) as a function of the radial impact parameter for different subsets of foreground galaxies selected in terms of their rest-frame colors and masses. Blue galaxies have a significantly higher average MgII EW at close galactocentric radii as compared to the red galaxies. Among the blue galaxies, there is a correlation between MgII EW and galactic stellar mass of the host galaxy. We also find that the distribution of MgII absorption around group galaxies is more extended than that for non-group galaxies, and that groups as a whole have more extended radial profiles than individual galaxies. Interestingly, these effects can be satisfactorily modeled by a simple superposition of the absorption profiles of individual member galaxies, assuming that these are the same as those of non-group galaxies, suggesting that the group environment may not significantly enhance or diminish the MgII absorption of individual galaxies. We show that there is a strong azimuthal dependence of the MgII absorption within 50 kpc of inclined disk-dominated galaxies, indicating the presence of a strongly bipolar outflow aligned along the disk rotation axis. There is no significant dependence of MgII absorption on the apparent inclination angle of disk-dominated galaxies.

引用

页数：11

共 47 条

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THE RADIAL AND AZIMUTHAL PROFILES OF MgII ABSORPTION AROUND 0.5 &lt; z &lt; 0.9 zCOSMOS GALAXIES OF DIFFERENT COLORS, MASSES, AND ENVIRONMENTS

THE RADIAL AND AZIMUTHAL PROFILES OF MgII ABSORPTION AROUND 0.5 < z < 0.9 zCOSMOS GALAXIES OF DIFFERENT COLORS, MASSES, AND ENVIRONMENTS