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Leo Triplet

January 01, 1970

Not to be confused with Leo Cluster or Leo I Group.

The Leo Triplet (also known as the M66 Group) is a small group of galaxies about 35 million light-years away[5] in the constellation Leo. This galaxy group consists of the spiral galaxies M65, M66, and NGC 3628.

Leo Triplet
The Leo Triplet, with M65 (right top), M66 (right bottom) and
NGC 3628 (left). North is to the left.
Observation data (Epoch J2000)
Constellation(s)Leo
Right ascension11h 17m[1][2]
Declination+13° 25′[1][2]
Brightest memberM66[1][2]
Number of galaxies3-5[1][2][3]
Other designations
M66 Group, Arp 317,[4] LGG 231,[1]
NOGG P1 533,[2] NOGG P2 543[2]
See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters

Members edit

The table below lists galaxies that have been consistently identified as group members in the Nearby Galaxies Catalog,[3] the Lyons Groups of Galaxies (LGG) Catalog,[1] and the group lists created from the Nearby Optical Galaxy sample of Giuricin et al.[2]

Member list edit

Members of the Leo Triplet
Name Type[6] R.A. (J2000)[6] Dec. (J2000)[6] Redshift (km/s)[6] Apparent Magnitude
M65 SAB(rs)a 11h 18m 56.0s +13° 05′ 32″ 807 ± 3 9.3[7]
M66 SAB(s)b 11h 20m 15.0s +12° 59′ 30″ 727 ± 3 8.9[8]
NGC 3628 SAb pec 11h 20m 17.0s +13° 35′ 23″ 843 ± 1 9.5[9]

Additionally, some of the references cited above indicate that one or two other nearby galaxies may be group members. NGC 3593 is frequently but not consistently identified as a member of this group.

Nearby groups edit

The M96 Group is located physically near the Leo Triplet.[10] These two groups may actually be separate parts of a much larger group,[10] and some group identification algorithms actually identify the Leo Triplet as part of the M96 Group.[2][11]

See also edit

References edit

  1. ^ a b c d e f 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 h 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. ^ a b R. B. Tully (1988). Nearby Galaxies Catalog. Cambridge: Cambridge University Press. ISBN 0-521-35299-1.
  4. ^ H. Arp (1966). "Atlas of Peculiar Galaxies". Astrophysical Journal Supplement. 14: 1–20. Bibcode:1966ApJS...14....1A. doi:10.1086/190147.
  5. ^ VST Looks at the Leo Triplet — and Beyond
  6. ^ a b c d "NASA/IPAC Extragalactic Database". Results for various galaxies. Retrieved 2006-10-24.
  7. ^ "Messier 65". SEDS Messier Catalog. Retrieved 25 April 2022.
  8. ^ "Messier 66". SEDS Messier Catalog. Retrieved 25 April 2022.
  9. ^ "NGC 3628". SEDS NGC Catalog. Retrieved 25 April 2022.
  10. ^ a b L. Ferrarese, H. C. Ford, J. Huchra, R. C. Kennicutt Jr., J. R. Mould, S. Sakai, W. L. Freedman, P. B. Stetson, B. F. Madore, B. K. Gibson, J. A. Graham, S. M. Hughes, G. D. Illingworth, D. D. Kelson, L. Macri, K. Sebo, N. A. Silbermann (2000). "A Database of Cepheid Distance Moduli and Tip of the Red Giant Branch, Globular Cluster Luminosity Function, Planetary Nebula Luminosity Function, and Surface Brightness Fluctuation Data Useful for Distance Determinations". Astrophysical Journal Supplement. 128 (2): 431–459. arXiv:astro-ph/9910501. Bibcode:2000ApJS..128..431F. doi:10.1086/313391. S2CID 121612286.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  11. ^ P. Fouque, E. Gourgoulhon, P. Chamaraux, G. Paturel; Gourgoulhon; Chamaraux; Paturel (1992). "Groups of galaxies within 80 Mpc. II – The catalogue of groups and group members". Astronomy and Astrophysics Supplement. 93: 211–233. Bibcode:1992A&AS...93..211F.{{cite journal}}: CS1 maint: multiple names: authors list (link)

External links edit

  • The Leo Triplett (M66 group) at messier.seds.org
  • The Leo Triplet on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
  • Szymanek, Nik; Gray, Meghan. "M65 – Spiral Galaxy". Deep Sky Videos. Brady Haran.
  • Finder chart at freestarcharts.com (PDF format)


January 01, 1970
triplet, confused, with, cluster, group, also, known, group, small, group, galaxies, about, million, light, years, away, constellation, this, galaxy, group, consists, spiral, galaxies, 3628, with, right, right, bottom, andngc, 3628, left, north, left, observat. Not to be confused with Leo Cluster or Leo I Group The Leo Triplet also known as the M66 Group is a small group of galaxies about 35 million light years away 5 in the constellation Leo This galaxy group consists of the spiral galaxies M65 M66 and NGC 3628 Leo TripletThe Leo Triplet with M65 right top M66 right bottom andNGC 3628 left North is to the left Observation data Epoch J2000 Constellation s LeoRight ascension11h 17m 1 2 Declination 13 25 1 2 Brightest memberM66 1 2 Number of galaxies3 5 1 2 3 Other designationsM66 Group Arp 317 4 LGG 231 1 NOGG P1 533 2 NOGG P2 543 2 See also Galaxy group Galaxy cluster List of galaxy groups and clusters Contents 1 Members 1 1 Member list 2 Nearby groups 3 See also 4 References 5 External linksMembers editThe table below lists galaxies that have been consistently identified as group members in the Nearby Galaxies Catalog 3 the Lyons Groups of Galaxies LGG Catalog 1 and the group lists created from the Nearby Optical Galaxy sample of Giuricin et al 2 Member list edit Members of the Leo Triplet Name Type 6 R A J2000 6 Dec J2000 6 Redshift km s 6 Apparent Magnitude M65 SAB rs a 11h 18m 56 0s 13 05 32 807 3 9 3 7 M66 SAB s b 11h 20m 15 0s 12 59 30 727 3 8 9 8 NGC 3628 SAb pec 11h 20m 17 0s 13 35 23 843 1 9 5 9 Additionally some of the references cited above indicate that one or two other nearby galaxies may be group members NGC 3593 is frequently but not consistently identified as a member of this group Nearby groups editThe M96 Group is located physically near the Leo Triplet 10 These two groups may actually be separate parts of a much larger group 10 and some group identification algorithms actually identify the Leo Triplet as part of the M96 Group 2 11 See also editNGC 5866 Group another small group of galaxiesReferences edit a b c d e f A Garcia 1993 General study of group membership II Determination of nearby groups Astronomy and Astrophysics Supplement 100 47 90 Bibcode 1993A amp AS 100 47G a b c d e f g h 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 a b R B Tully 1988 Nearby Galaxies Catalog Cambridge Cambridge University Press ISBN 0 521 35299 1 H Arp 1966 Atlas of Peculiar Galaxies Astrophysical Journal Supplement 14 1 20 Bibcode 1966ApJS 14 1A doi 10 1086 190147 VST Looks at the Leo Triplet and Beyond a b c d NASA IPAC Extragalactic Database Results for various galaxies Retrieved 2006 10 24 Messier 65 SEDS Messier Catalog Retrieved 25 April 2022 Messier 66 SEDS Messier Catalog Retrieved 25 April 2022 NGC 3628 SEDS NGC Catalog Retrieved 25 April 2022 a b L Ferrarese H C Ford J Huchra R C Kennicutt Jr J R Mould S Sakai W L Freedman P B Stetson B F Madore B K Gibson J A Graham S M Hughes G D Illingworth D D Kelson L Macri K Sebo N A Silbermann 2000 A Database of Cepheid Distance Moduli and Tip of the Red Giant Branch Globular Cluster Luminosity Function Planetary Nebula Luminosity Function and Surface Brightness Fluctuation Data Useful for Distance Determinations Astrophysical Journal Supplement 128 2 431 459 arXiv astro ph 9910501 Bibcode 2000ApJS 128 431F doi 10 1086 313391 S2CID 121612286 a href Template Cite journal html title Template Cite journal cite journal a CS1 maint multiple names authors list link P Fouque E Gourgoulhon P Chamaraux G Paturel Gourgoulhon Chamaraux Paturel 1992 Groups of galaxies within 80 Mpc II The catalogue of groups and group members Astronomy and Astrophysics Supplement 93 211 233 Bibcode 1992A amp AS 93 211F a href Template Cite journal html title Template Cite journal cite journal a CS1 maint multiple names authors list link External links editThe Leo Triplett M66 group at messier seds org The Leo Triplet on WikiSky DSS2 SDSS GALEX IRAS Hydrogen a X Ray Astrophoto Sky Map Articles and images Szymanek Nik Gray Meghan M65 Spiral Galaxy Deep Sky Videos Brady Haran Finder chart at freestarcharts com PDF format Retrieved from https en wikipedia org w index php title Leo Triplet amp oldid 1141757598, wikipedia, wiki, book, books, library,

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