M101 Grubu

M101 Grubu
Fırıldak Gökadası, M101 Grubu'nun en parlak gökadası.
Gözlem verisi (Dönem J2000)
TakımyıldızBüyük Ayı
Sağ açıklık (α)14sa 04d [1][2]
Dik açıklık (δ)+54° 31′[1][2]
En parlak üyeFırıldak Gökadası[1][2][3]
Galaksi sayısı6-9[1][2][4][3]
Katalog belirtmeleri
NGC 5457 Grubu, LGG 371,[1]
NOGG H 758,[2] NOGG P1 766,[2]
NOGG P2 781[2]

M101 Grubu Büyük Ayı takımyıldızı yönünde bulunan oldukça gevşek bir gökada grubudur. Grup, adını en parlak üyesi olan (M101) Fırıldak Gökadası'ndan almıştır. Grubun diğer üyelerinin çoğu Fırıldak Gökadası'nın uydusu durumundadır.[1][2][4][3] M101 Grubu, pek çok diğer gökada grupları gibi Başak Süperkümesi içerisindedir.[5]

Üyeler

Aşağıdaki tabloda M101 Grubunun üyeleri özellikleriyle belirtilmiştir. M101 grubu, M51 Grubu ve NGC 5866 Grubu'nun birlikte büyük bir küme oluşturdukları da düşünülmektedir.[6]

M101 Grubu üyeleri
Name Tipi[7] S.A. (J2000)[7] D.A. (J2000)[7] Kırmızıya kayma (km/s)[7] Görünen parlaklık[7]
Fırıldak Gökadası (M101) SAB(rs)cd 14sa 03d 12.6s +54° 20′ 57″ 241 ± 2 8.3
NGC 5204 SA(s)m 13sa 29d 36.5s +58° 25′ 07″ 201 ± 1 11.7
NGC 5474 SA(s)cd pec 14sa 05d 01.6s +53° 39′ 44″ 273 ± 9 11.3
NGC 5477 SA(s)m 14sa 05d 33.2s +54° 27′ 39″ 304 ± 5 14.4
NGC 5585 SAB(s)d 14sa 19d 48.2s +56° 43′ 45″ 305 ± 3 11.2
UGC 8837 IB(s)m 13sa 54d 45.8s +53° 54′ 03″ 144 ± 3 13.8
UGC 9405 Im 14sa 35d 24.4s +57° 15′ 19″ 222 ± 6 17

Son zamanlarda yapılan araştırmalarda UGC 8331, Messier 51, NGC 5195, M101, NGC 5474, NGC 5477, NGC 5585 ve UGC 9405'in kesinlikle bu grubun üyeleri olduğu iddia edilmektedir. Diğer olası üye Düzensiz gökadalar (bazı kaynaklarda sadece bir veya birkaçı yer almaktadır) NGC 5238 ve UGC 8508'dir.

Yakın gruplar

Girdap Gökadası (M51) ve Ayçiçeği Gökadası'nı da içeren M51 Grubu,[1][2][4][3] M101 Grubu'nun güneydoğusunda ve NGC 5866 Grubu kuzeybatısında yer alır.[6]

Ayrıca bakınız

Kaynakça

  1. ^ a b c d e f g A. Garcia (1993). "General study of group membership. II - Determination of nearby groups". Astronomy and Astrophysics Supplement. Cilt 100. ss. 47-90. 13 Aralık 2019 tarihinde kaynağından arşivlendi. Erişim tarihi: 1 Ekim 2020. 
  2. ^ a b c d e f g h i G. Giuricin, C. Marinoni, L. Ceriani, A. Pisani (2000). "Nearby Optical Galaxies: Selection of the Sample and Identification of Groups". Astrophysical Journal. Cilt 543. ss. 178-194. doi:10.1086/317070. 21 Ocak 2019 tarihinde kaynağından arşivlendi. Erişim tarihi: 24 Mart 2009. 
  3. ^ a b c d P. Fouque, E. Gourgoulhon, P. Chamaraux, G. Paturel (1992). "Groups of galaxies within 80 Mpc. II - The catalogue of groups and group members". Astronomy and Astrophysics Supplement. Cilt 93. ss. 211-233. 13 Aralık 2019 tarihinde kaynağından arşivlendi. Erişim tarihi: 1 Ekim 2020. 
  4. ^ a b c R. B. Tully (1988). Nearby Galaxies Catalog. Cambridge: Cambridge University Press. ISBN 0-521-35299-1. 
  5. ^ R. B. Tully (1982). "The Local Supercluster". Astrophysical Journal. Cilt 257. ss. 389-422. doi:10.1086/159999. 30 Eylül 2018 tarihinde kaynağından arşivlendi. Erişim tarihi: 24 Mart 2009. 
  6. ^ 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. Cilt 128. ss. 431-459. doi:10.1086/313391. 15 Ekim 2007 tarihinde kaynağından arşivlendi. Erişim tarihi: 24 Mart 2009.  Kaynak hatası: Geçersiz <ref> etiketi: "ferrareseetal00" adı farklı içerikte birden fazla tanımlanmış (Bkz: Kaynak gösterme)
  7. ^ a b c d e "NASA/IPAC Extragalactic Database". Değişik gökadalar için sonuçlar. 14 Mayıs 2011 tarihinde kaynağından arşivlendi. Erişim tarihi: 15 Ekim 2006. 

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