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NGC 2273

维基百科,自由的百科全书
NGC 2273
观测资料(J2000曆元
星座天猫座
赤经06h 50m 08.7s[1]
赤纬60° 50′ 45″[1]
紅移0.006138 ± 0.000013[1]
徑向速度1,840 ± 4km/s[1]
距离94.5 ± 13Mly (29.0 ± 4.0Mpc)[1]
视星等(V)11.6[2]
特征
类型SB(r)a[1]
角直徑(V)3′.2 × 2′.5[1]
其他塞弗特星系
其他名称
UGC 3546、​MCG+10-10-015、​PGC 19688,Mrk 620[1]
參見:星系星系列表

NGC 2273是一个位于天猫座棒旋星系,距离地球约9500万光年,由尼尔斯·克里斯托弗·杜奈尔于1867年9月15日发现 。根据它在天球中的大小,可以推测该星系的直径约10万光年。[3]

特征

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星系演化探测器拍摄的NGC 2273

NGC 2273有一个環星系,倾角为41 度,有由两个螺旋臂构成一个内环和两个外伪环,并有一个直径40弧秒的星系棒。[4]该星系拥有质量约7009110000000000000♠1.1×109 M氢气(HI),大部分位于外伪环区域。该星系还拥有大量的分子气体,如CO线所示,这说明恒星形成活动在该星系很活跃。[5]星系的总红外光度为1010.25L[6]

哈勃空间望远镜对星系中心附近20弧秒区域的观测显示星系的螺旋臂与星系内环相对应。星系中心的卵状结构由一个星系棒和两个弧形的星系核环组成,它所造成的辐射与电离氢区有关。[7]核周围有一个直径7弧秒的环状结构,其西北部分比较清晰,离星系核20弧秒处有另一个星环。[8]

星系核

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根据其光學頻譜中存在的譜線,NGC 2273具有活动星系核 ,并被分类为II型西佛星系[9][10]此外,在星系中心还检测到了水千脉泽英语kilomaser。这可以由活动星系核或明显的恒星形成活动而产生。[11]

BeppoSAX卫星XMM-牛顿卫星钱德拉X射线天文台猜测NGC 2273核心被柱密度较高的康普顿粗柱(Compton thick column)遮住,[12][13]ASCA英语Advanced Satellite for Cosmology and Astrophysics估计其有7024110000000000000♠1.1×1024 cm−2[14]朱雀卫星估计其有7024150000000000000♠1.5×1024 cm−2[15]Fe-K线表明,硬X射线尝试通过冷金属物质时被反射。[14]星系核心区域的光谱有微弱的偏振,尤其是H-α线。[16]从NGC 2273发现的宽X射线光谱由热的疏散的软的部分、反射部分和能量集中部分组成。该星系2-10 keV的X射线通量估计为7042170000000000000♠1.7×1042 ergs−1.[15]

该星系核有两个相距170秒差距相对论性喷流无线电波源发射线性无线电波[17]在 [O III] λ5007的图像中可以看到线型喷发物喷出的物质在核周围已经扩展到2弧秒大小。它与无线电波发射源对齐,可能与星系核有关。[7]

关于活动星系核活动所需的能量来源,最广为接受的猜想是星系中心超大质量黑洞的周围存在一个吸积盘。基于水脉泽环核圆盘的运动,该星系中心黑洞质量约是7006750000000000000♠(7.5±0.4)×106M。该吸积盘还出现扭曲。[18]

附近的星系

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NGC 2273是NGC 2273星系群中最亮的星系。该星系群中还包括NGC 2237B 和UGC 3504,[19][20]其中NGC 2237B在南边40弧秒处。[21]

另见

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参考

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  1. ^1.01.11.21.31.41.51.61.7NASA/IPAC Extragalactic Database. Results for NGC 2273. [2019-01-18]. (原始内容存档于2021-07-24). 
  2. ^Revised NGC Data for NGC 2273. spider.seds.org. [25 November 2018]. (原始内容存档于2018-02-14). 
  3. ^NGC 2273页面存档备份,存于互联网档案馆) cseligman.com
  4. ^Aguerri, J. A. L.; Beckman, J. E.; Prieto, M.Bar Strengths, Bar Lengths, and Corotation Radii, Derived Photometrically for 10 Barred Galaxies. The Astronomical Journal. November 1998,116 (5): 2136–2153.Bibcode:1998AJ....116.2136A.doi:10.1086/300615可免费查阅. 
  5. ^van Driel, W.; Buta, R. J.A study of the ringed galaxies NGC2273, 4826, and 6217. I - H I line observations. Astronomy and Astrophysics. 1 May 1991,245: 7–26.Bibcode:1991A&A...245....7V.ISSN 0004-6361. 
  6. ^Sanders, D. B.; Mazzarella, J. M.; Kim, D.-C.; Surace, J. A.; Soifer, B. T.The IRAS Revised Bright Galaxy Sample. The Astronomical Journal. October 2003,126 (4): 1607–1664.Bibcode:2003AJ....126.1607S.S2CID 14825701.arXiv:astro-ph/0306263可免费查阅.doi:10.1086/376841. 
  7. ^7.07.1Ferruit, Pierre; Wilson, Andrew S.; Mulchaey, John. Hubble Space Telescope WFPC2 Imaging of a Sample of Early-Type Seyfert Galaxies. The Astrophysical Journal Supplement Series. May 2000,128 (1): 139–169.Bibcode:2000ApJS..128..139F.doi:10.1086/313379可免费查阅. 
  8. ^Yankulova, I. M. The circumnuclear gas and dust environment of the ringed Seyfert 2 galaxy MKN 620. Astronomy and Astrophysics. 1 April 1999,344: 36–42.Bibcode:1999A&A...344...36Y.ISSN 0004-6361. 
  9. ^Huchra, J. P.; Wyatt, W. F.; Davis, M. New bright Seyfert Galaxies. The Astronomical Journal. December 1982,87: 1628.Bibcode:1982AJ.....87.1628H.doi:10.1086/113254. 
  10. ^Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. A Search for "Dwarf Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies. The Astrophysical Journal Supplement Series. October 1997,112 (2): 315–390.Bibcode:1997ApJS..112..315H.S2CID 17086638.arXiv:astro-ph/9704107可免费查阅.doi:10.1086/313041. 
  11. ^Zhang, J. S.; Henkel, C.; Kadler, M.; Greenhill, L. J.; Nagar, N.; Wilson, A. S.; Braatz, J. A. Extragalactic H2O masers and X-ray absorbing column densities. Astronomy & Astrophysics. 19 April 2006,450 (3): 933–944.Bibcode:2006A&A...450..933Z.doi:10.1051/0004-6361:20054138可免费查阅. 
  12. ^Maiolino, R.; Salvati, M.; Bassani, L.; Dadina, M.; della Ceca, R.; Matt, G.; Risaliti, G.; Zamorani, G. Heavy obscuration in X-ray weak AGNs. Astronomy and Astrophysics. 1 October 1998,338: 781–794.Bibcode:1998A&A...338..781M.ISSN 0004-6361.arXiv:astro-ph/9806055可免费查阅. 
  13. ^Guainazzi, M.; Fabian, A. C.; Iwasawa, K.; Matt, G.; Fiore, F. On the transmission-dominated to reprocessing-dominated spectral state transitions in Seyfert 2 galaxies. Monthly Notices of the Royal Astronomical Society. 1 January 2005,356 (1): 295–308.Bibcode:2005MNRAS.356..295G.arXiv:astro-ph/0409689可免费查阅.doi:10.1111/j.1365-2966.2004.08448.x可免费查阅. 
  14. ^14.014.1Terashima, Yuichi; Iyomoto, Naoko; Ho, Luis C.; Ptak, Andrew F. X-Ray Properties of LINERs and Low-Luminosity Seyfert Galaxies Observed with ASCA. I. Observations and Results. The Astrophysical Journal Supplement Series. March 2002,139 (1): 1–36.Bibcode:2002ApJS..139....1T.arXiv:astro-ph/0203005可免费查阅.doi:10.1086/324373可免费查阅. 
  15. ^15.015.1Awaki, Hisamitsu; Terashima, Yuichi; Higaki, Yuusuke; Fukazawa, Yasushi. Detection of Hard X-Rays from the Compton-Thick Seyfert 2 Galaxy NGC 2273 with Suzaku. Publications of the Astronomical Society of Japan. 30 January 2009,61 (sp1): S317–S325.Bibcode:2009PASJ...61S.317A.S2CID 12846803.arXiv:0810.4570可免费查阅.doi:10.1093/pasj/61.sp1.S317. 
  16. ^Moran, Edward C.; Barth, Aaron J.; Kay, Laura E.; Filippenko, Alexei V. The Frequency of Polarized Broad Emission Lines in Type 2 Seyfert Galaxies. The Astrophysical Journal. 10 September 2000,540 (2): L73–L77.Bibcode:2000ApJ...540L..73M.arXiv:astro-ph/0007357可免费查阅.doi:10.1086/312876可免费查阅. 
  17. ^Ulvestad, J. S.; Wilson, A. S. Radio structures of Seyfert galaxies. VI - VLA observations of a nearby sample. The Astrophysical Journal. October 1984,285: 439.Bibcode:1984ApJ...285..439U.doi:10.1086/162520. 
  18. ^Kuo, C. Y.; Braatz, J. A.; Condon, J. J.; Impellizzeri, C. M. V.; Lo, K. Y.; Zaw, I.; Schenker, M.; Henkel, C.; Reid, M. J.; Greene, J. E. The Megamaser Cosmology Project. III. Accurate Masses of Seven Supermassive Black Holes in Active Galaxies with Circumnuclear Megamaser Disks. The Astrophysical Journal. 20 January 2011,727 (1): 20.Bibcode:2011ApJ...727...20K.arXiv:1008.2146可免费查阅.doi:10.1088/0004-637X/727/1/20可免费查阅. 
  19. ^Makarov, Dmitry; Karachentsev, Igor.Galaxy groups and clouds in the local (z∼ 0.01) Universe. Monthly Notices of the Royal Astronomical Society. 21 April 2011,412 (4): 2498–2520 [2021-07-24].Bibcode:2011MNRAS.412.2498M.S2CID 119194025.arXiv:1011.6277可免费查阅.doi:10.1111/j.1365-2966.2010.18071.x. (原始内容存档于2016-01-31). 
  20. ^Garcia, A. M.General study of group membership. II - Determination of nearby groups. Astronomy and Astrophysics Supplement Series. 1993,100 (1): 47–90 [2021-07-24].Bibcode:1993A&AS..100...47G.ISSN 0365-0138. (原始内容存档于2018-12-24). 
  21. ^de Vaucouleurs, G.; de Vaucouleurs, A.; Corwin, J. R. Second reference catalogue of bright galaxies. Second Reference Catalogue of Bright Galaxies. 1976,1976.Bibcode:1976RC2...C......0D. 

外部链接

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维基共享资源上的相关多媒体资源:NGC 2273


NGC天體表2000-2499
检索自“https://zh.wikipedia.org/w/index.php?title=NGC_2273&oldid=73114768
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