NGC 3621
NGC 3621是一個螺旋星系,位於長蛇座,距離地球約2,200萬光年(6.7 Mpc)[4][6],也是一個場星系。
該星系相對明亮,在中等尺寸的望遠鏡中可以清楚地看到。該星系的直徑約為93,000光年(29,000 pc),從邊緣觀察時傾斜角為25°。它的亮度相當於太陽的130億倍。該星系形態分類為SA(s)d[1],這是一個具有鬆散纏繞臂的普通螺旋星系[7]。NGC 3621儘管看似孤立[7],實際上隸屬於獅子座支線星系群[8]。
該星系有一個與西佛星系光譜相匹配的活躍核,表明其核心存在一個超大質量黑洞。根據恆星在原子核中的運動,該黑洞的質量可能高達太陽質量的三百萬倍[9]。
2024年4月,天文學家在NGC 3621中觀測到一顆超新星:SN 2024ggi[10]。
參考資料
- ^ 1.0 1.1 1.2 1.3 1.4 Bresolin, Fabio; Kennicutt, Robert C.; Ryan-Weber, Emma, Gas Metallicities in the Extended Disks of NGC 1512 and NGC 3621. Chemical Signatures of Metal Mixing or Enriched Gas Accretion?, The Astronomical Journal, May 2012, 750 (2): 122, Bibcode:2012ApJ...750..122B, S2CID 118616035, arXiv:1203.0956 , doi:10.1088/0004-637X/750/2/122.
- ^ Koribalski, B. S.; et al, The 1000 Brightest HIPASS Galaxies: H I Properties, The Astronomical Journal, July 2004, 128 (1): 16–46, Bibcode:2004AJ....128...16K, S2CID 16229767, arXiv:astro-ph/0404436 , doi:10.1086/421744.
- ^ Tully, R. Brent; Shaya, Edward J.; Karachentsev, Igor D.; Courtois, Hélène M.; Kocevski, Dale D.; Rizzi, Luca; Peel, Alan, Recalibration of the H–0.5 magnitudes of spiral galaxies, Astrophysical Journal Supplement Series, January 1995, 96 (1): 123–157, Bibcode:1995ApJS...96..123T, S2CID 15737426, arXiv:astro-ph/9405047 , doi:10.1086/192115.
- ^ 4.0 4.1 Tully, R. Brent; et al, Our Peculiar Motion Away from the Local Void, The Astrophysical Journal, March 2008, 676 (1): 184–205, Bibcode:2008ApJ...676..184T, S2CID 14738309, arXiv:0705.4139 , doi:10.1086/527428.
- ^ NGC 3621. SIMBAD. 斯特拉斯堡天文資料中心. [2021-02-24].
- ^ Materne, J. The structure of nearby groups of galaxies - Quantitative membership probabilities. Astronomy and Astrophysics. April 1979, 74 (2): 235–243. Bibcode:1979A&A....74..235M.
- ^ 7.0 7.1 Buta, Ronald J.; Corwin, Harold G.; Odewahn, Stephen C., Atlas of Galaxies, Cambridge University Press: 13–17, 2007, ISBN 978-0521820486.
- ^ O'Meara, Stephen James, Deep-Sky Companions: Southern Gems, Cambridge University Press: 203, 2013, Bibcode:2013dcsg.book.....O, ISBN 978-1107015012.
- ^ Barth, Aaron J.; Strigari, Louis E.; Bentz, Misty C.; Greene, Jenny E.; Ho, Luis C., Dynamical Constraints on the Masses of the Nuclear Star Cluster and Black Hole in the Late-Type Spiral Galaxy NGC 3621, The Astronomical Journal, January 2009, 690 (1): 1031–1044, Bibcode:2009ApJ...690.1031B, S2CID 12574940, arXiv:0809.1066 , doi:10.1088/0004-637X/690/1/1031.
- ^ Transient Name Server entry for SN 2024ggi. (页面存档备份,存于互联网档案馆) Retrieved 12 April 2024.
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外部連結
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