STELLAR DYNAMIC EVIDENCE FOR DARK HALOS IN ELLIPTIC GALAXIES - THE CASE OF NGC-4472, IC-4296, AND NGC-7144

被引：74
作者：
SAGLIA, RP
BERTIN, G
BERTOLA, F
DANZIGER, J
DEJONGHE, H
SADLER, EM
STIAVELLI, M
DEZEEUW, PT
ZEILINGER, WW
机构：
[1] SCUOLA NORMALE SUPER PISA,I-56126 PISA,ITALY
[2] UNIV PADUA,DEPT ASTRON,I-35100 PADUA,ITALY
[3] EUROPEAN SO OBSERV,W-8046 GARCHING,GERMANY
[4] ANGLO AUSTRALIAN OBSERV,EPPING,NSW 2121,AUSTRALIA
[5] RUG OBSERVATORIUM,B-9000 GHENT,BELGIUM
[6] STERREWACHT,2300 RA LEIDEN,NETHERLANDS
来源：
ASTROPHYSICAL JOURNAL | 1993年 / 403卷 / 02期
关键词：
GALAXIES; ELLIPTIC AND LENTICULAR; CD; INDIVIDUAL; (IC-4296; NGC-4472; NGC-7144); KINEMATICS AND DYNAMICS;
D O I：
10.1086/172226
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Extended and accurate major axis kinematical profiles and line strength gradients of the elliptical galaxies NGC 4472, IC 4296, and NGC 7144 have been measured using the ESO NTT in the EMMI long-slit spectroscopic mode. For NGC 7144 the stellar rotation curve and velocity dispersion profile extend to 75'' from the center (where the surface brightness is 24.4 B-mag arcsec-2, 2.8 mag below the sky), with typical error bars of 10 km s-1. The flat or slowly increasing velocity dispersion profiles of these galaxies indicate that massive dark halos might dominate their dynamics.
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页码：567 / 572
页数：6
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