UGC 12591

UGC 12591
Hubble Uzay Teleskobu tarafından elde edilen UGC 12591'in görüntüsü
Gözlem verisi (Dönem J2000)
TakımyıldızKanatlı At
Sağ açıklık (α)23sa 25d 21,8s[1]
Dik açıklık (δ)+28° 29′ 43″[1]
Galaksi sınıfıS0/a LINER[1]
Görünür büyüklük (V)13,9[1]
Görünür boyut (V)1,7′ × 0,7′[1]
Özellikler
Kırmızıya kayma (z)0,023166 ± 0,000009[1]
Helyo dikey hız ()(6945 ± 3) km/s[1]
Mesafe293,54 MIy (90 Mpc)
Kütle (m)1,9×1012[2] M
Katalog belirtmeleri
UGC 12591 • PGC 71392 • CGCG 497-015 • MCG +05-55-015 • 2MASX J23252175+2829425
  Wikimedia Commons'ta ilgili ortam

UGC 12591, Kanatlı At takımyıldızında yaklaşık olarak 293,54 MIy (90 Mpc) uzaklıkta bulunan bir merceksi gökadadır. Merkezdeki şişkinliği ve Sombrero Gökadası'nı andıran toz şeritleri ile[3] bir S0/Sa gökdası olarak sınıflandırılır ve morfolojik olarak merceksi ile sarmal arasında bir yerde yer alır.[4]

UGC 12591'in 21 cm ve optik gözlemleri, gökadanın şu ana kadar bilinen tüm disk sistemleri içinde en büyük dönüş hızına sahip olduğunu göstermektedir. Samanyolu'nun neredeyse iki katı olan 500 km/s'lik hızıyla daha önce ölçülen en büyük değerleri %30 oranında aşmaktadır.[2] Bu olağanüstü dönüş hızı, ancak merkezinde devasa bir kütlenin varlığıyla mümkün olabilir. UGC 12591'in kütlesinin gökada ve halesi ile birlikte Güneş'in kütlesinin birkaç yüz milyar katı, Samanyolu'nun kütlesinin ise dört katı olduğu tahmin edilmektedir.[4]

UGC 12591 nispeten izole bir gökadadır ve ona en yakın gökada 3,55 milyon ışık yılı (1,09 Mpc) uzaklıkta bulunur. Bununla birlikte morfolojisi geçmişte bir birleşme veya yığılma olayına işaret etmektedir.[3] Evrende bilinen en büyük yapılardan biri olan ve 250 milyon ışık yılı boyunca uzanan bir gökada kümeleri zinciri olan Kahraman-Balıklar Süperkümesi'nin en batı bölgesinde yer alır.[4]

Kaynakça

  1. ^ a b c d e f g "NED results for object UGC 12591". NASA/IPAC EXTRAGALACTIC DATABASE. Erişim tarihi: 20 Eylül 2024. 
  2. ^ a b Giovanelli, R.; Haynes, M. P.; Rubin, V. C.; Ford, W. K. Jr. (1 Şubat 1986). "UGC 12591 - The most rapidly rotating disk galaxy". The Astrophysical Journal Letters. Cilt 301. ss. L7-L11. Bibcode:1986ApJ...301L...7G. doi:10.1086/184613Özgürce erişilebilir. ISSN 0004-637X. 
  3. ^ a b Ray, Shankar; Bagchi, Joydeep; Dhiwar, Suraj; Pandge, M. B.; Mirakhor, Mohammad; Walker, Stephen A.; Mukherjee, Dipanjan (2022). "Hubble Space Telescope Captures UGC 12591: Bulge/Disc properties, star formation and 'missing baryons' census in a very massive and fast-spinning hybrid galaxy". Monthly Notices of the Royal Astronomical Society. 517 (1). ss. 99-117. arXiv:2203.02885 $2. Bibcode:2022MNRAS.517...99R. doi:10.1093/mnras/stac2683Özgürce erişilebilir. 
  4. ^ a b c "A remarkable galactic hybrid". ESA/Hubble. 2 Aralık 2019 tarihinde kaynağından arşivlendi. Erişim tarihi: 20 Eylül 2024. 

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