Powered by OpenAIRE graph
Found an issue? Give us feedback
addClaim

This Research product is the result of merged Research products in OpenAIRE.

You have already added 0 works in your ORCID record related to the merged Research product.

Galaxies and Galaxy Groups

Authors: Craig Crossen; Gerald Rhemann;

Galaxies and Galaxy Groups

Abstract

Few galaxies are loners: almost all are members of groups of at least a dozen systems. The Milky Way is no exception. It is the second brightest in a group of three dozen, mostly dwarf, galaxies. The brightest member of the Local Galaxy Group is the Andromeda Spiral M31. The most luminous members of the Local Group, including all those visible with any type of binoculars or small richest-field telescope, are listed in the accompanying table. The three brightest systems in the Local Group are all large spirals: the Andromeda Galaxy M31, the Milky Way, and the Triangulum Galaxy M33. The Local Group also has three Magellanic spirals (irregular systems with incipient spiral structure)-the Large Magellanic Cloud (LMC), NGC 3109, and IC 10-and four dwarf ellipticals-M32, and NGCs 147, 185, and 205. However the majority of our Local Group members are either dwarf irregulars resembling, but even smaller than, the Small Magellanic Cloud (SMC), or extremely loose, low-luminosity dwarf spheriodals (none of which are visible in wide-field instruments). The Local Group does not have any lenticular (SO) or giant elliptical (E) systems: the nearest of these types of galaxies are in the Centau- rus (NGC 5128) Galaxy Group. The total mass of the Local Group is estimated to be 3.7 trillion Solar masses. Half of the total luminosity of the Local Group comes from the Andromeda Spiral alone.

  • BIP!
    Impact byBIP!
    citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
Powered by OpenAIRE graph
Found an issue? Give us feedback
citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Upload OA version
Are you the author of this publication? Upload your Open Access version to Zenodo!
It’s fast and easy, just two clicks!