Ram pressure stripping of disc galaxies: the role of the inclination angle
Ram pressure stripping of disc galaxies: the role of the inclination angle
复制标题
圆盘星系的冲压压力剥离:倾角的作用
DOI:
10.1111/j.1365-2966.2006.10335.x
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发表时间:
2006
影响因子:
4.8
通讯作者:
Brüggen
中科院分区:
文献类型:
--
作者:
Roediger;Brüggen
We present three-dimensional (3D) hydrodynamical simulations of ram pressure stripping of massive disc galaxies in clusters. Studies of galaxies that move face-on have predicted that in such a geometry the galaxy can lose a substantial amount of its interstellar medium. But only a small fraction of galaxies is moving face-on. In this work we focus on a systematic study of the effect of the inclination angle between the direction of motion and the galaxy's rotation axis.In agreement with some previous works, we find that the inclination angle does not play a major role for the mass loss as long as the galaxy is not moving close to edge-on (inclination angle ≲60°). We explain this behaviour by extending Gunn & Gott's estimate of the stripping radius, which is valid for face-on geometries, to moderate inclinations.The inclination plays a role as long as the ram pressure is comparable to pressures in the galactic plane, which can span two orders of magnitude. For very strong ram pressures, the disc will be stripped completely, and for very weak ram pressures, mass loss is negligible independent of inclination. We show that in non-edge-on geometries the stripping proceeds remarkably similar. A major difference between different inclinations is the degree of asymmetry introduced in the remaining gas disc.We demonstrate that the tail of gas stripped from the galaxy does not necessarily point in a direction opposite to the galaxy's direction of motion. Therefore, the observation of a galaxy's gas tail may be misleading about the galaxy's direction of motion.
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DOI:
10.1086/300683
发表时间:
1998
期刊:
The Astronomical Journal
影响因子:
--
作者:
J. Kenney;R. Koopmann
通讯作者:
R. Koopmann
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
E. Roediger;G. Hensler;Institute for Theoretical Physics;Astrophysics Kiel;U. Vienna
通讯作者:
U. Vienna
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
J. Kenney;R. Koopmann
通讯作者:
R. Koopmann
DOI:
--
发表时间:
2003
期刊:
Publications Astronomical Society of Australia
影响因子:
--
作者:
K. Pimbblet
通讯作者:
K. Pimbblet
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
B. Vollmer;R. Beck;J. Kenney;J. V. G. Cds;O. Strasbourg;France;M. F. Radioastronomie;Bonn;Germany;Yale University;New Haven;Usa;C. University;New York.
通讯作者:
New York.