NGC 3621

NGC 3621
NGC 3621
	歐洲南天天文台拉西亞天文台所拍攝的NGC 3621
观测资料（J2000 曆元）
星座	長蛇座
赤经	11h 18m 16.52s
赤纬	–32° 48′ 50.7″
紅移	0.002435 ± 0.000007
徑向速度	+727 km/s
距离	21,700,000 光年 (6.64 Mpc)
视星等 (V)	10.0
特征
类型	SA(s)d
质量	2 × 1010 M☉
角直徑 (V)	12,3′× 6,8′
其他名称
	MCG-05-27-008、PGC 34554
	參見：星系、星系列表

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

A Picture-perfect Pure-disc Galaxy （页面存档备份，存于互联网档案馆） — ESO Photo release.

天文學目錄
NGC天體表：	NGC 3619 - NGC 3620 - NGC 3621 - NGC 3622 - NGC 3623

[AJ750_2_122-1] 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.

[APJ128_1_16-2] 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.

[APJSS96_1_123-3] 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.

[APJ676_1_184-4] 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.

[5] NGC 3621. SIMBAD. 斯特拉斯堡天文資料中心. [2021-02-24].

[1979A&A....74..235M-6] 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.

[Buta2007-7] 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.

[OMeara2013-8] O'Meara, Stephen James, Deep-Sky Companions: Southern Gems, Cambridge University Press: 203, 2013, Bibcode:2013dcsg.book.....O, ISBN 978-1107015012.

[AJ690_1_1031-9] 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.

[10] 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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