M94 Group

M94 Group
Observation data (Epoch J2000)
Constellation(s)Canes Venatici & Coma Berenices
Right ascension[1][2]
Declination[1][2]
Brightest memberM94,[2] M106,[1]
Number of galaxies16–24[1][2][3]
Other designations
NGC 4736 Group,[4] Canes Venatici I Group,[4]
Canes Venatici Cloud,[4]
LGG 291,[1] NOGG H 617,[2]
NOGG P1 636,[2] NOGG P2 647[2]

The M94 Group (Canes I Group or Canes Venatici I Group) is a loose, extended group of galaxies located about 13 million light-years away[5] in the constellations Canes Venatici and Coma Berenices. The group is one of many groups that lies within the Virgo Supercluster (i.e. the Local Supercluster)[6] and one of the closest groups to the Local Group.

Although the galaxies in this cluster appear to be from a single large cloud-like structure, many of the galaxies within the group are only weakly gravitationally bound, and some have not yet formed stable orbits around the center of this group. Instead, most of the galaxies in this group appear to be moving with the expansion of the universe.[5][7]

  1. ^ a b c d e A. Garcia (1993). "General study of group membership. II – Determination of nearby groups". Astronomy and Astrophysics Supplement. 100: 47–90. Bibcode:1993A&AS..100...47G.
  2. ^ a b c d e f g G. Giuricin; C. Marinoni; L. Ceriani; A. Pisani (2000). "Nearby Optical Galaxies: Selection of the Sample and Identification of Groups". Astrophysical Journal. 543 (1): 178–194. arXiv:astro-ph/0001140. Bibcode:2000ApJ...543..178G. doi:10.1086/317070. S2CID 9618325.
  3. ^ Cite error: The named reference nbg was invoked but never defined (see the help page).
  4. ^ a b c "NAME CVn I Group". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2006-10-30.
  5. ^ a b I. D. Karachentsev (2005). "The Local Group and Other Neighboring Galaxy Groups". Astronomical Journal. 129 (1): 178–188. arXiv:astro-ph/0410065. Bibcode:2005AJ....129..178K. doi:10.1086/426368. S2CID 119385141.
  6. ^ R. B. Tully (1982). "The Local Supercluster". Astrophysical Journal. 257: 389–422. Bibcode:1982ApJ...257..389T. doi:10.1086/159999.
  7. ^ I. D. Karachentsev; M. E. Sharina; A. E. Dolphin; E. K. Grebel; D. Geisler; P. Guhathakurta; P. W. Hodge; V. E. Karachentseva; A. Sarajedini; P. Seitzer (2003). "Galaxy flow in the Canes Venatici I cloud". Astronomy and Astrophysics. 398 (2): 467–477. arXiv:astro-ph/0210414. Bibcode:2003A&A...398..467K. doi:10.1051/0004-6361:20021598. S2CID 6310283.