Assuming that the gas in the halo of a disk galaxy is supplied from the disk as a hot gas, we have studied its dynamical and thermal behavior by means of a time dependent, two-dimensional hydrodynamic code. Depending upon the temperature and density of the gas at the disk, three types ...
The disk and dark halo mass of the barred galaxy ngc 4123. i. observations - Weiner, Williams, et al. - 2001 () Citation Context ...s, warps and rings Density waves can in fact be a rather efficient tool to constrain the mass distribution in galaxies. By examining the gas response ...
For this purpose we need to analyse the observed XV diagrams in such a way as to accurately measure all three functions that describe the planar kinematics and distribution of a galaxy: the radial Hi surface density, the rotation curve and the Hi velocity dispersion. In this paper, we first...
A. The halo B. The disk C. The bulge D. The arms 相关知识点: 试题来源: 解析 B。解析:银河系的银盘包含了大部分的恒星。选项A银晕,银晕中的恒星数量相对较少;选项C核球,虽然有恒星但数量不如银盘多;选项D旋臂,旋臂是银盘的一部分,单独说旋臂不如银盘包含的恒星多。反馈...
We present an initial survey of Mg II absorption characteristics in the halos of a carefully constructed, volume-limited subsample of galaxies embedded in ... EJ Barton,J Cooke - 《Astronomical Journal》 被引量: 46发表: 2009年 HALO GAS AND GALAXY DISK KINEMATICS OF A VOLUME-LIMITED SAMPLE OF...
Discussing the results, special effort has been devoted to the mutual sensitivity of halo and disk parameters which we understand in a twofold manner: 1) numerical interdependence between the present parameters of the visible Galaxy and the ones of dark matter, and 2) dependence of the bright ...
The outermost gaseous disk of our Galaxy is warped (Burton and te Lintel Hekkert 1986; Wouterloot et al. 1990), and a stellar component may be present as well (Miyamoto et al. 1988; Djorgovski and Sosin 1989). If so, the outermost edges of the Galaxy's disk may be more readily ...
The assembly of our Galaxy can be reconstructed using the motions and chemistry of individual stars1,2. Chemo-dynamical studies of the stellar halo near the Sun have indicated the presence of multiple components3, such as streams4 and clumps5, as well as
A relatively thin layer of material distributed in the central plane of a spiral galaxy, in contrast to the nucleus or halo. (biology) Any of various rounded and flattened animal and plant structures. (computer science) A rotating circular plate having a magnetizable surface on which information...
The light distribution of this galaxy is dominated by its spheroid. We fi... PCVD Kruit,L Searle - 《Astronomy & Astrophysics》 被引量: 245发表: 1982年 The dark matter halo shape of edge-on disk galaxies - I. HI observations This is the third paper in a series in which we attempt ...