THE VARIANCE OF QUASAR COUNTS IN CELLS

被引:5
作者
ANDREANI, P [1 ]
CRISTIANI, S [1 ]
LUCCHIN, F [1 ]
MATARRESE, S [1 ]
MOSCARDINI, L [1 ]
机构
[1] UNIV PADUA,DIPARTIMENTO FIS G GALILEI,I-35131 PADUA,ITALY
关键词
GALAXIES; CLUSTERING; LARGE-SCALE STRUCTURE OF UNIVERSE; QUASARS; GENERAL;
D O I
10.1086/174422
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
From three quasar samples with a total of 1038 objects in the redshift range 1.0-2.2 we measure the variance a 2 of counts in cells of volume V(u). By a maximum-likelihood analysis applied separately on these samples we obtain estimates of sigma2(l), with l = = V(u)1/3. The analysis from a single catalog for l = 40 h-1 Mpc and from a suitable average over the three catalogs for l = 60, 80, and 100 h-1 Mpc, gives sigma2(l) = 0.46(+0.27/-0.27), 0.18(+0.14/-0.15), 0.05(+0.14/0.05), and 0.12(+0.13/-0.12), respectively, where the 70% confidence ranges account for both sampling errors and statistical fluctuations in the counts. This allows a comparison of QSO clustering on large scales with analogous data recently obtained both for optical and IRAS galaxies: QSOs seem to be more clustered than these galaxies by a biasing factor b(QSO)/b(gal) approximately 1.4-2.3.
引用
收藏
页码:458 / 462
页数:5
相关论文
共 30 条
[1]   QUASAR CLUSTERING IN SCULPTOR AND IN THE VERON CATALOG [J].
ANDERSON, N ;
KUNTH, D ;
SARGENT, WLW .
ASTRONOMICAL JOURNAL, 1988, 95 (03) :644-650
[2]   IS THE UNIVERSE A FRACTAL - TESTS ON QUASAR SAMPLES [J].
ANDREANI, P ;
CRISTIANI, S ;
LAFRANCA, F .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1991, 253 (03) :527-532
[3]   THE EVOLUTION OF QUASAR CLUSTERING [J].
ANDREANI, P ;
CRISTIANI, S .
ASTROPHYSICAL JOURNAL, 1992, 398 (01) :L13-L16
[4]   A BOOTSTRAP RESAMPLING ANALYSIS OF GALAXY CLUSTERING [J].
BARROW, JD ;
BHAVSAR, SP ;
SONODA, DH .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1984, 210 (02) :P19-P23
[5]   MOMENTS OF THE COUNTS DISTRIBUTION IN THE 1.2 JANSKY IRAS GALAXY REDSHIFT SURVEY [J].
BOUCHET, FR ;
STRAUSS, MA ;
DAVIS, M ;
FISHER, KB ;
YAHIL, A ;
HUCHRA, JP .
ASTROPHYSICAL JOURNAL, 1993, 417 (01) :36-53
[6]  
BOYLE BJ, 1991, ASTR SOC P, V21, P191
[7]  
BOYLE BJ, 1990, MON NOT R ASTRON SOC, V243, P1
[8]   REDDENINGS DERIVED FROM H-1 AND GALAXY COUNTS - ACCURACY AND MAPS [J].
BURSTEIN, D ;
HEILES, C .
ASTRONOMICAL JOURNAL, 1982, 87 (08) :1165-&
[9]   THE LARGE, BRIGHT QSO SURVEY .4. QSOS IN 2 EQUATORIAL FIELDS [J].
CHAFFEE, FH ;
FOLTZ, CB ;
HEWETT, PC ;
FRANCIS, PJ ;
WEYMANN, RJ ;
MORRIS, SL ;
ANDERSON, SF ;
MACALPINE, GM .
ASTRONOMICAL JOURNAL, 1991, 102 (02) :461-487
[10]   BIASED CLUSTERING IN THE COLD DARK MATTER COSMOGONY [J].
COLE, S ;
KAISER, N .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1989, 237 (04) :1127-1146