Dwarf spheroidal kinematics with large radial velocity samples
نویسندگان
چکیده
منابع مشابه
Internal Kinematics of Dwarf Spheroidal Galaxies
We discuss the quality of kinematic data in dwarf spheroidal galaxies, the current interpretations of those data, and prospects for actually deriving the mass profile in these galaxies. We then discuss stellar populations constraints on some of the models that attempt to explain the kinematics and formation of the dSph’s.
متن کاملThe Kinematics of Dwarf Spheroidal Galaxies
I review observational data on the kinematic properties of dwarf spheroidal galaxies in the halo of the Milky Way and beyond. The present data confirm previous claims that these small galaxies have unusually large central velocity dispersions. ‘Simple’ sources of bias such as binary stars, internal atmospheric motions, measurement errors and small sample sizes cannot explain the large dispersio...
متن کاملThe Internal Kinematics of Dwarf Spheroidal Galaxies
The status of kinematic observations in Local Group dwarf spheroidal galaxies (dSphs) is reviewed. Various approaches to the dynamical modelling of these data are discussed and some general features of dSph dark matter haloes based on simple mass models are presented.
متن کاملInternal Kinematics of the Fornax Dwarf Spheroidal Galaxy
We present new radial velocity results for 178 stars in the Fornax dwarf spheroidal galaxy, of which at least 158 are probable Fornax members. We combine with previously published data to obtain a radial velocity sample with 209 stars, of which at least 179 are probable Fornax members. We detect the hint of rotation about an axis near Fornax’s morphological minor axis, though the significance o...
متن کاملInternal Kinematics of the Andromeda Ii Dwarf Spheroidal Galaxy
The High Resolution Echelle Spectrometer on the Keck I telescope has been used to measure nine radial velocities having a median precision of ' 2 km s−1 for seven red giants belonging to the isolated dwarf spheroidal galaxy Andromeda II (And II). We find a weighted mean radial velocity of vr = –188±3 km s−1 and a central velocity dispersion of σ0 = 9.3 −2.6 km s −1. There may be evidence for a ...
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: Proceedings of the International Astronomical Union
سال: 2005
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921305003583