Unequal-mass galaxy merger remnants: Spiral-like morphology but elliptical-like kinematics
نویسندگان
چکیده
منابع مشابه
Statistical Properties of Collisionless Equal- and Unequal-Mass Merger Remnants of Disk Galaxies
We perform a large parameter survey of collisionless N-body simulations of binary mergers of disk-galaxies with mass ratios of 1:1, 2:1, 3:1, and 4:1 using the special purpose hardware GRAPE. A set of 112 merger simulations is used to investigate the fundamental statistical properties of merger remnants as a function of the initial orientation and the mass ratio of the progenitor disks. The pho...
متن کاملElliptical Galaxy Halo Masses from Internal Kinematics
The halo masses of nearby individual elliptical galaxies can be estimated by using the kinematics of their stars, planetary neb-ulae, and globular clusters—ideally in combination. With currently improving coverage of galaxies of ordinary luminosities and morphologies , systematic trends may be identified. Bright, boxy ellipticals show strong signatures of dark matter, while faint, disky ones ty...
متن کاملFormation of a Spiral Galaxy in a Major Merger
We use numerical simulations to examine the structure of merger remnants resulting from collisions of gas-rich spiral galaxies. When the gas fraction of the progenitors is small, the remnants structurally and kinematically resemble elliptical galaxies, in agreement with earlier work. However, if the progenitor disks are gas-dominated, new types of outcomes are possible. In fact, we show that a ...
متن کامل3328 : A “ dwarf elliptical galaxy ” with spiral structure ?
We present the 2-D photometric decomposition of the Virgo galaxy IC3328. The analysis of the global light distribution of this morphologically classified nucleated dwarf elliptical galaxy (dE1,N) reveals a tightly wound, bi-symmetric spiral structure with a diameter of 4.5 kpc, precisely centered on the nucleus of the dwarf. The amplitude of the spiral is only three percent of the dwarf’s surfa...
متن کاملStellar halos and elliptical galaxy formation: Origin of dynamical properties of the planetary nebular systems
Recent spectroscopic observations of planetary nebulae (PNe) in several elliptical galaxies have revealed structural and kinematical properties of the outer stellar halo regions. In order to elucidate the origin of the properties of these planetary nebula systems (PNSs), we consider the merger scenario in which an elliptical galaxy is formed by merging of spiral galaxies. Using numerical simula...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2004
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20040114