Absorption systems in the spectra of 66 z ≳ 4 quasars

被引:84
作者
Péroux, C
Storrie-Lombardi, LJ
McMahon, RG
Irwin, M
Hook, IM
机构
[1] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England
[2] CALTECH, SIRTF Sci Ctr, Pasadena, CA 91125 USA
[3] Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland
关键词
galaxies : evolution; galaxies : high-redshift; line : identification; quasars : absorption lines; quasars : general; surveys;
D O I
10.1086/319967
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present high signal-to-noise, similar to5 Angstrom resolution (FWHM) spectra of 66 z greater than or similar to 4 bright quasars obtained with the 4 m Cerro Tololo Inter-American Observatory and 4.2 m William Hershel telescopes. The primary goal of these observations was to undertake a new survey for intervening absorption systems detected in the spectra of background quasars. We look for both Lyman-limit systems (column densities N-HI greater than or equal to 1.6 x 10(17) atoms cm(-2)) and damped Ly alpha systems (column densities N-IH greater than or equal to 2 x 10(20) atoms cm(-2)). This work resulted in the discovery of 49 Lyman-limit systems, 15 of which are within 3000 km s(-1) of the quasar emission and thus might be associated with the quasar itself, 26 new damped Ly alpha absorption candidates, 15 of which have z >3.5, and numerous metal absorption systems. In addition, 10 of the quasars presented here exhibit intrinsic broad absorption lines.
引用
收藏
页码:1799 / 1820
页数:22
相关论文
共 48 条
[1]   A "minihalo" model for the Lyman limit absorption systems at high redshift [J].
Abel, T ;
Mo, HJ .
ASTROPHYSICAL JOURNAL, 1998, 494 (02) :L151-L154
[2]   OSCILLATOR-STRENGTHS OF THE SI-PI 181-NANOMETER RESONANCE MULTIPLET [J].
BERGESON, SD ;
LAWLER, JE .
ASTROPHYSICAL JOURNAL, 1993, 414 (02) :L137-L140
[3]   ATOMIC PHYSICS WITH THE GODDARD HIGH-RESOLUTION SPECTROGRAPH ON THE HUBBLE-SPACE-TELESCOPE .2. OSCILLATOR-STRENGTHS FOR SINGLY IONIZED IRON [J].
CARDELLI, JA ;
SAVAGE, BD .
ASTROPHYSICAL JOURNAL, 1995, 452 (01) :275-285
[4]   A RECIPE FOR GALAXY FORMATION [J].
COLE, S ;
ARAGONSALAMANCA, A ;
FRENK, CS ;
NAVARRO, JF ;
ZEPF, SE .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1994, 271 (04) :781-806
[5]  
DESSAUGESZAVADS.M, 2000, UNPUB A A
[6]   The discovery of a luminous z=5.80 quasar from the Sloan Digital Sky Survey [J].
Fan, XH ;
White, RL ;
Davis, M ;
Becker, RH ;
Strauss, MA ;
Haiman, Z ;
Schneider, DP ;
Gregg, MD ;
Gunn, JE ;
Knapp, GR ;
Lupton, RH ;
Anderson, JE ;
Anderson, SF ;
Annis, J ;
Bahcall, NA ;
Boroski, WN ;
Brunner, RJ ;
Chen, B ;
Connolly, AJ ;
Csabai, I ;
Doi, M ;
Fukugita, M ;
Hennessy, GS ;
Hindsley, RB ;
Ichikawa, T ;
Ivezic, Z ;
Loveday, J ;
Meiksin, A ;
McKay, TA ;
Munn, JA ;
Newberg, HJ ;
Nichol, R ;
Okamura, S ;
Pier, JR ;
Sekiguchi, M ;
Shimasaku, E ;
Stoughton, C ;
Szalay, AS ;
Szokoly, GP ;
Thakar, AR ;
Vogeley, MS ;
York, DG .
ASTRONOMICAL JOURNAL, 2000, 120 (03) :1167-1174
[7]   High-redshift quasars found in Sloan Digital Sky Survey commissioning data [J].
Fan, XH ;
Strauss, MA ;
Schneider, DP ;
Gunn, JE ;
Lupton, RH ;
Yanny, B ;
Anderson, SF ;
Anderson, JE ;
Annis, J ;
Bahcall, NA ;
Bakken, JA ;
Bastian, S ;
Berman, E ;
Boroski, WN ;
Briegel, C ;
Briggs, JW ;
Brinkmann, J ;
Carr, MA ;
Colestock, PL ;
Connolly, AJ ;
Crocker, JH ;
Csabai, I ;
Czarapata, PC ;
Davis, JE ;
Doi, M ;
Elms, BR ;
Evans, ML ;
Federwitz, GR ;
Frieman, JA ;
Fukugita, M ;
Gurbani, VK ;
Harris, FH ;
Heckman, TM ;
Hennessy, GS ;
Hindsley, RB ;
Holmgren, DJ ;
Hull, C ;
Ichikawa, SI ;
Ichikawa, T ;
Ivezic, Z ;
Kent, S ;
Knapp, GR ;
Kron, RG ;
Lamb, DQ ;
Leger, RF ;
Limmongkol, S ;
Lindenmeyer, C ;
Long, DC ;
Loveday, J ;
MacKinnon, B .
ASTRONOMICAL JOURNAL, 1999, 118 (01) :1-13
[8]   A HIGH SIGNAL-TO-NOISE RATIO COMPOSITE QUASAR SPECTRUM [J].
FRANCIS, PJ ;
HEWETT, PC ;
FOLTZ, CB ;
CHAFFEE, FH ;
WEYMANN, RJ ;
MORRIS, SL .
ASTROPHYSICAL JOURNAL, 1991, 373 (02) :465-470
[9]   ON DENSITY OF NEUTRAL HYDROGEN IN INTERGALACTIC SPACE [J].
GUNN, JE ;
PETERSON, BA .
ASTROPHYSICAL JOURNAL, 1965, 142 (04) :1633-&
[10]  
Hall PB, 1996, ASTROPHYS J, V462, P614, DOI 10.1086/177177