Skupina galaxií M 74

Skupina galaxií M 74
Messier 74, nejjasnější galaxie ve Skupině galaxií M74. Autor: ESA/NASA.
Messier 74, nejjasnější galaxie ve Skupině galaxií M74. Autor: ESA/NASA.
Pozorovací údaje
(Ekvinokcium J2000,0)
Rektascenze1h 38m 28,0s[1]
Deklinace+15°10′21″[1]
SouhvězdíRyby (Psc)
Fyzikální charakteristiky
Počet galaxií5-7[2][3][4][5]
Nejjasnější galaxieMessier 74[3]
Označení v katalozích
NGC 628 Group,[2] LGG 29,[2] NOGG H 94,[3] NOGG P1 84,[3] NOGG P2 87[3]

Skupina galaxií M74 (anglicky označovaná také NGC 628 Group) je malá skupina galaxií v souhvězdí Ryb. Skupina nese označení podle nejjasnější galaxie této skupiny, kterou je k Zemi čelně natočená galaxie Messier 74, vzdálená od Země přibližně 35 milionů světelných let.[6] Mezi další členy skupiny patří pekuliární spirální galaxie NGC 660 a několik menších nepravidelných galaxií.[2][3][4] Skupina tvoří spolu s dalšími blízkými skupinami Místní nadkupu galaxií (Nadkupu galaxií v Panně).[5]

Členové skupiny

Následující tabulka ukazuje ty členy Skupiny galaxií M74, na kterých se shodují Nearby Galaxies Catalog,[4] Lyons Groups of Galaxies (LGG) Catalog[2] a tři seznamy této skupiny vytvořené při průzkumu Nearby Optical Galaxies.[3]

Členové Skupiny galaxií M74
Název Typ[7] R.A. (J2000)[7] Dec. (J2000)[7] Rudý posuv (km/s)[7] Magnituda[7]
Messier 74 SA(s)c 1h 36m 41,7s +15°47′1″ 657 ± 1 10,0
NGC 660 SB(s)a pec 1h 43m 2,4s +13°38′42″ 850 ± 1 12,0
UGC 1176 Im 1h 40m 9,9s +15°54′17″ 630 ± 0 14,4
UGC 1195 Sc 1h 42m 27,0s +13°58′37″ 774 ± 3 13,9
UGC 1200 IBm 1h 42m 48,3s +13°9′22″ 808 ± 4 14,0

Dalšími možnými členy skupiny (uváděnými pouze v jednom nebo dvou z výše uvedených zdrojů) jsou nepravidelné galaxie UGC 891, UGC 1104, UGC 1171, UGC 1175 a UGCA 20.

Reference

V tomto článku byl použit překlad textu z článku M74 Group na anglické Wikipedii.

  1. ↑ a b NASA/IPAC Extragalactic Database: Results for NGC 0628 Group [online]. [cit. 2017-11-01]. Dostupné online. (anglicky) 
  2. ↑ a b c d e A. Garcia. General study of group membership. II - Determination of nearby groups. S. 47–90. Astronomy and Astrophysics Supplement [online]. Červenec 1993 [cit. 2017-11-02]. Roč. 100, s. 47–90. Dostupné online. Bibcode 1993A&AS..100...47G. (anglicky) 
  3. ↑ a b c d e f g G. Giuricin; C. Marinoni; L. Ceriani, et al. Nearby Optical Galaxies: Selection of the Sample and Identification of Groups. S. 178–194. Astrophysical Journal [online]. Listopad 2000 [cit. 2017-11-02]. Roč. 543, čís. 1, s. 178–194. Dostupné online. arXiv astro-ph/0001140. doi:10.1086/317070. Bibcode 2000ApJ...543..178G. (anglicky) 
  4. ↑ a b c R. B. Tully. Nearby Galaxies Catalog. Cambridge: Cambridge University Press, 1988. ISBN 0-521-35299-1. 
  5. ↑ a b Fouque, P.; Gourgoulhon, E.; Chamaraux, P., et al. Groups of galaxies within 80 Mpc. II - The catalogue of groups and group members. S. 211–233. Astronomy and Astrophysics Supplement [online]. Květen 1992 [cit. 2017-11-02]. Roč. 93, čís. 2, s. 211–233. Dostupné online. Bibcode 1992A&AS...93..211F. (anglicky) 
  6. ↑ SEDS Messier Objects Database: Messier 74 [online]. [cit. 2017-11-02]. Dostupné online. (anglicky) 
  7. ↑ a b c d e NASA/IPAC Extragalactic Database: Results for Various Galaxies [online]. [cit. 2017-11-02]. Dostupné online. (anglicky) 

Externí odkazy

  • FROMMERT, Hartmut. The M74 group of galaxies [online]. [cit. 2017-11-01]. Dostupné online. (anglicky) 

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