Morphological classification of the local I- and K-band galaxy sample

被引:16
作者
Huang, JS [1 ]
Cowie, LL [1 ]
Luppino, GA [1 ]
机构
[1] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA
关键词
cosmology; observations; galaxies; photometry; statistics; structure; surveys;
D O I
10.1086/305373
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In this paper, we report on the morphologically segregated I- and K-band number counts at bright magnitudes from a wide-field deep survey. This survey has been carried out with the first large mosaic CCD camera (8192 x 8192) on the University of Hawaii 88 inch (2.24 m) telescope and the Canada-France-Hawaii Telescope (CFHT). This instrument allows us to take deep wide-held galaxy images efficiently. We have been able to obtain I-band number counts in a wide range from I = 12.5 to I = 22.5, and to classify the morphologies of galaxies down to I = 18.5. Morphologically segregated number counts for ellipticals, spirals, and irregulars are obtained for the first time with magnitudes brighter than I = 18.5. The morphological classifications correlate well with the galaxy colors. By modeling these number counts, we confirm that a no-evolution model can fit both K- and I-band number counts of ellipticals and spirals reasonably well, but the irregular/peculiar galaxies show a substantial excess at faint magnitudes over the no-evolution model. With the number counts at bright magnitudes, we further demonstrate that the rise in this excess begins by I = 20. This rise is consistent with a rapidly increasing star formation rate in low-luminosity galaxies at about z = 0.35.
引用
收藏
页码:31 / 38
页数:8
相关论文
共 33 条
[1]   Galaxy morphology to I=25 mag in the Hubble Deep Field [J].
Abraham, RG ;
Tanvir, NR ;
Santiago, BX ;
Ellis, RS ;
Glazebrook, K ;
vandenBergh, S .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1996, 279 (03) :L47-&
[2]  
BARGER A, 1997, UNPUB
[3]  
BINGGELI B, 1988, AR A, V26, P206
[4]   New insight on galaxy formation and evolution from Keck spectroscopy of the Hawaii deep fields [J].
Cowie, LL ;
Songaila, A ;
Hu, EM ;
Cohen, JG .
ASTRONOMICAL JOURNAL, 1996, 112 (03) :839-864
[5]   THE HAWAII K-BAND GALAXY SURVEY .1. DEEP K-BAND IMAGING [J].
COWIE, LL ;
GARDNER, JP ;
HU, EM ;
SONGAILA, A ;
HODAPP, KW ;
WAINSCOAT, RJ .
ASTROPHYSICAL JOURNAL, 1994, 434 (01) :114-127
[6]   GALAXY MORPHOLOGIES FROM HST WFPC2 IMAGING OF THE HAWAII SURVEY [J].
COWIE, LL ;
HU, EM ;
SONGAILA, A .
ASTRONOMICAL JOURNAL, 1995, 110 (04) :1576-&
[7]   DEEP GALAXY COUNTS IN THE K-BAND WITH THE KECK TELESCOPE [J].
DJORGOVSKI, S ;
SOIFER, BT ;
PAHRE, MA ;
LARKIN, JE ;
SMITH, JD ;
NEUGEBAUER, G ;
SMAIL, I ;
MATTHEWS, K ;
HOGG, DW ;
BLANDFORD, RD ;
COHEN, J ;
HARRISON, W ;
NELSON, J .
ASTROPHYSICAL JOURNAL, 1995, 438 (01) :L13-L14
[8]   THE MORPHOLOGICAL MIX OF FIELD GALAXIES TO M(I)=24.25 MAGNITUDES (B(J)SIMILAR-TO-26 MAGNITUDES) FROM A DEEP HUBBLE-SPACE-TELESCOPE WFPC2 IMAGE [J].
DRIVER, SP ;
WINDHORST, RA ;
WINDHORST, A ;
OSTRANDER, EJ ;
KEEL, WC ;
GRIFFITHS, RE ;
RATNATUNGA, KU .
ASTROPHYSICAL JOURNAL, 1995, 449 (01) :L23-L27
[9]   ANALYSIS OF A COMPLETE GALAXY REDSHIFT SURVEY .2. THE FIELD-GALAXY LUMINOSITY FUNCTION [J].
EFSTATHIOU, G ;
ELLIS, RS ;
PETERSON, BA .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1988, 232 (02) :431-461
[10]  
ELLIS RS, 1997, IN PRESS AR A