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PLANETARY-NEBULAE AS PROBES OF DARK-MATTER IN NGC-3384

被引：23
作者：
TREMBLAY, B
MERRITT, D
WILLIAMS, TB
机构：
[1] Department of Physics and Astronomy, Rutgers University, Piscataway
来源：
ASTROPHYSICAL JOURNAL | 1995年 / 443卷 / 01期
关键词：
DARK MATTER; GALAXIES; ELLIPTIC AND LENTICULAR; CD; FUNDAMENTAL PARAMETERS; INDIVIDUAL; (NGC; 3384); PLANETARY NEBULAE; GENERAL; TECHNIQUES; RADIAL VELOCITIES;
D O I：
10.1086/187822
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have obtained radial velocities of 68 planetary nebulae (PNs) surrounding the SB0 galaxy NGC 3384 in the Leo I group, using the CTIO 4 m telescope and the Rutgers Fabry-Perot interferometer. The PN system exhibits a well-ordered rotation field aligned with the photometric axes of the galaxy. The rotation curve is flat from about 2 kpc until at least 7 kpc. We infer a lower limit of 0.7 x 10(11) M. for the mass of NGC 3384. Our results imply that at least a third of the dynamical mass of the NGC 3379/3384 system-estimated by Schneider (1985) to be roughly 6 x 10(11) M.-may be accounted for in the two bright galaxies.
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页码：L5 / L8
页数：4
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