The Nearest Group of Galaxies
نویسندگان
چکیده
منابع مشابه
The nature of the nearest compact group of galaxies from precise distance measurements (Research Note)
Context. Compact groups (CGs) of galaxies, similar to those catalogued by Hickson, appear to be the densest galaxy structures in the Universe. Redshift information is insufficient to determine whether a CG is roughly as dense in three dimensions as it appears in projection, or whether it is caused by a chance alignment along the line of sight within a larger galaxy system. Aims. Recent precise ...
متن کاملThe nature of the nearest compact group of galaxies from precise distance measurements
Context. Compact groups of galaxies as those catalogued by Hickson appear to be the densest galaxy structures in the Universe. Redshift information is not sufficient to determine whether a compact group is roughly as dense in 3 dimensions as it appears in projection, or whether it is caused by a chance alignment along the line of sight within a larger galaxy system. Aims. Recent precise measure...
متن کاملWhat galaxies know about their nearest cluster
We measure the clustocentric distances of 52,569 galaxies in the redshift range of 0.015 < z < 0.068. By “clustocentric distance” we mean the transverse projected distance to the center of the nearest cluster within ±2000 km s. By “cluster” we mean a bound group of at least Ngal galaxies brighter than Mr = −19 mag; we consider different “richness” criteria of Ngal = 5, 10, and 20. We examine th...
متن کاملReionization of the Local Group of Galaxies
We present the first detailed structure formation and radiative transfer simulations of the reionization history of our cosmic neighbourhood. To this end, we follow the formation of the Local Group of galaxies and nearby clusters by means of constrained simulations, which use the available observational constraints to construct a representation of those structures which reproduces their actual ...
متن کاملThe dynamics of isolated Local Group galaxies
We measured velocities of 862 individual red giant stars in seven isolated dwarf galaxies in the Local Group: NGC 6822, IC 1613, VV 124 (UGC 4879), the Pegasus dwarf irregular galaxy (DDO 216), Leo A, Cetus and Aquarius (DDO 210). We also computed velocity dispersions, taking into account the measurement uncertainties on individual stars. None of the isolated galaxies is denser than the densest...
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: The Astrophysical Journal
سال: 1999
ISSN: 0004-637X
DOI: 10.1086/312044