NGC 3489

NGC 3489
NGC 3489
	哈勃太空望远镜拍摄的NGC 3489
观测资料（J2000 曆元）
星座	狮子座
赤经	11h 00m 18.6s
赤纬	+13° 54′ 04″
紅移	0.002258 ± 0.000006
徑向速度	677 ± 2 km/s
距离	29 ± 8.4 Mly (8.9 ± 2.6 Mpc)
视星等 (V)	10.2
特征
类型	SAB(rs)0+
角直徑 (V)	3′.5 × 2′.0
其他名称
	UGC 6082, CGCG 066-084, MCG +02-28-039, PGC 33160
	參見：星系、星系列表

NGC 3489是位于狮子座的一个透镜星系。它距离地球约3,000万光年，考虑到其外观尺寸，这意味着NGC 3489的宽度约为30,000光年。它是由威廉·赫歇尔（William Herschel）于1784年4月8日发现的。^[3]NGC 3489是狮子座星系团的成员之一。^[4]

NGC 3489有一个薄弱的星系扁球体，沿短轴看，有一个小旋臂。^[5] NGC 3489中恒星的年龄呈梯度变化，越年轻的恒星越靠近核心。在巴耳末系中观察时，NGC 3489的中央的角速度显示一个峰值，表明在其核心存在较年轻的恒星，其年龄估计约为17亿年。^[6]尽管目前NGC 3489被认为是星暴星系，但在星系核心中仍然存在可以导致恒星形成的分子云，尽管它的质量小于星系中的活跃恒星形成的质量。^[7]在NGC 3489的核心区域中，观察到具有开放螺旋形形态的尘埃。^[6]星系具有外环结构，沿主轴线的直径为1.54弧分钟。^[8]

NGC 3489具有活动星系核，根据其光谱被归类为2型塞弗特星系，或者根据其星系核心的发射强度介于电离氢区核和低电离星系核之间，归类为一个过渡性天体。^[9] 这种过渡性的发射光谱可归因于位于星系核心的渐近巨星分支。^[7]人们认为，在星系中心积聚物质的超大质量黑洞是造成星系核活动的原因。在NGC 3489的中心，有一个黑洞，根据速度离散估计质量为（6±0.54）×106M☉。^[5]

参考资料

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 ^1.6 NASA/IPAC Extragalactic Database. Results for NGC 3489. [2016-01-18]. （原始内容存档于2019-01-04）.
^ Revised NGC Data for NGC 3489. spider.seds.org. [25 November 2018]. （原始内容存档于2020-07-03）.
^ Seligman, Courtney. NGC 3489. Celestial Atlas. [19 November 2018]. （原始内容存档于2020-01-11）.
^ Stierwalt, Sabrina; Haynes, Martha P.; Giovanelli, Riccardo; Kent, Brian R.; Martin, Ann M.; Saintonge, Amélie; Karachentsev, Igor D.; Karachentseva, Valentina E. The Arecibo Legacy Fast Alfa Survey. IX. The Leo Region H I Catalog, Group Membership, and the H I Mass Function for the Leo I Group. The Astronomical Journal. 1 August 2009, 138 (2): 338–361. Bibcode:2009AJ....138..338S. arXiv:0906.2178 . doi:10.1088/0004-6256/138/2/338.
^ ^5.0 ^5.1 Nowak, N.; Thomas, J.; Erwin, P.; Saglia, R. P.; Bender, R.; Davies, R. I. Do black hole masses scale with classical bulge luminosities only? The case of the two composite pseudo-bulge galaxies NGC 3368 and NGC 3489. Monthly Notices of the Royal Astronomical Society. 1 February 2010, 403 (2): 646–672. Bibcode:2010MNRAS.403..646N. arXiv:0912.2511 . doi:10.1111/j.1365-2966.2009.16167.x.
^ ^6.0 ^6.1 McDermid, Richard M.; Emsellem, Eric; Shapiro, Kristen L.; Bacon, Roland; Bureau, Martin; Cappellari, Michele; Davies, Roger L.; De Zeeuw, Tim; Falcón-Barroso, Jesús; Krajnović, Davor; Kuntschner, Harald; Peletier, Reynier F.; Sarzi, Marc. The SAURON project – VIII. OASIS/CFHT integral-field spectroscopy of elliptical and lenticular galaxy centres*. Monthly Notices of the Royal Astronomical Society. December 2006, 373 (3): 906–958. arXiv:astro-ph/0609452 . doi:10.1111/j.1365-2966.2006.11065.x.
^ ^7.0 ^7.1 Sarzi, Marc; Shields, Joseph C.; Schawinski, Kevin; Jeong, Hyunjin; Shapiro, Kristen; Bacon, Roland; Bureau, Martin; Cappellari, Michele; Davies, Roger L.; Tim de Zeeuw, P.; Emsellem, Eric; Falcón-Barroso, Jesús; Krajnović, Davor; Kuntschner, Harald; McDermid, Richard M.; Peletier, Reynier F.; van den Bosch, Remco C. E.; van de Ven, Glen; Yi, Sukyoung K. The SAURON project - XVI. On the sources of ionization for the gas in elliptical and lenticular galaxies. Monthly Notices of the Royal Astronomical Society. March 2010, 402 (4): 2187–2210. Bibcode:2010MNRAS.402.2187S. arXiv:0912.0275 . doi:10.1111/j.1365-2966.2009.16039.x.
^ Comerón, S.; Salo, H.; Laurikainen, E.; Knapen, J. H.; Buta, R. J.; Herrera-Endoqui, M.; Laine, J.; Holwerda, B. W.; Sheth, K.; Regan, M. W.; Hinz, J. L.; Muñoz-Mateos, J. C.; Gil de Paz, A.; Menéndez-Delmestre, K.; Seibert, M.; Mizusawa, T.; Kim, T.; Erroz-Ferrer, S.; Gadotti, D. A.; Athanassoula, E.; Bosma, A.; Ho, L. C. ARRAKIS: atlas of resonance rings as known in the S4G. Astronomy & Astrophysics. 19 February 2014, 562: A121. arXiv:1312.0866 . doi:10.1051/0004-6361/201321633.
^ 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. arXiv:astro-ph/9704107 . doi:10.1086/313041.

外部链接

WikiSky上关于NGC 3489的内容：DSS2, SDSS, GALEX, IRAS, 氢α, X射线, 天文照片, 天图, 文章和图片
NGC 3489 on SIMBAD（页面存档备份，存于互联网档案馆）

[ned-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 ^1.5 ^1.6 NASA/IPAC Extragalactic Database. Results for NGC 3489. [2016-01-18]. （原始内容存档于2019-01-04）.

[seds-2] Revised NGC Data for NGC 3489. spider.seds.org. [25 November 2018]. （原始内容存档于2020-07-03）.

[Seligman-3] Seligman, Courtney. NGC 3489. Celestial Atlas. [19 November 2018]. （原始内容存档于2020-01-11）.

[4] Stierwalt, Sabrina; Haynes, Martha P.; Giovanelli, Riccardo; Kent, Brian R.; Martin, Ann M.; Saintonge, Amélie; Karachentsev, Igor D.; Karachentseva, Valentina E. The Arecibo Legacy Fast Alfa Survey. IX. The Leo Region H I Catalog, Group Membership, and the H I Mass Function for the Leo I Group. The Astronomical Journal. 1 August 2009, 138 (2): 338–361. Bibcode:2009AJ....138..338S. arXiv:0906.2178 . doi:10.1088/0004-6256/138/2/338.

[Nowak-5] 5.0 ^5.1 Nowak, N.; Thomas, J.; Erwin, P.; Saglia, R. P.; Bender, R.; Davies, R. I. Do black hole masses scale with classical bulge luminosities only? The case of the two composite pseudo-bulge galaxies NGC 3368 and NGC 3489. Monthly Notices of the Royal Astronomical Society. 1 February 2010, 403 (2): 646–672. Bibcode:2010MNRAS.403..646N. arXiv:0912.2511 . doi:10.1111/j.1365-2966.2009.16167.x.

[McDermid06-6] 6.0 ^6.1 McDermid, Richard M.; Emsellem, Eric; Shapiro, Kristen L.; Bacon, Roland; Bureau, Martin; Cappellari, Michele; Davies, Roger L.; De Zeeuw, Tim; Falcón-Barroso, Jesús; Krajnović, Davor; Kuntschner, Harald; Peletier, Reynier F.; Sarzi, Marc. The SAURON project – VIII. OASIS/CFHT integral-field spectroscopy of elliptical and lenticular galaxy centres*. Monthly Notices of the Royal Astronomical Society. December 2006, 373 (3): 906–958. arXiv:astro-ph/0609452 . doi:10.1111/j.1365-2966.2006.11065.x.

[Sarzi10-7] 7.0 ^7.1 Sarzi, Marc; Shields, Joseph C.; Schawinski, Kevin; Jeong, Hyunjin; Shapiro, Kristen; Bacon, Roland; Bureau, Martin; Cappellari, Michele; Davies, Roger L.; Tim de Zeeuw, P.; Emsellem, Eric; Falcón-Barroso, Jesús; Krajnović, Davor; Kuntschner, Harald; McDermid, Richard M.; Peletier, Reynier F.; van den Bosch, Remco C. E.; van de Ven, Glen; Yi, Sukyoung K. The SAURON project - XVI. On the sources of ionization for the gas in elliptical and lenticular galaxies. Monthly Notices of the Royal Astronomical Society. March 2010, 402 (4): 2187–2210. Bibcode:2010MNRAS.402.2187S. arXiv:0912.0275 . doi:10.1111/j.1365-2966.2009.16039.x.

[8] Comerón, S.; Salo, H.; Laurikainen, E.; Knapen, J. H.; Buta, R. J.; Herrera-Endoqui, M.; Laine, J.; Holwerda, B. W.; Sheth, K.; Regan, M. W.; Hinz, J. L.; Muñoz-Mateos, J. C.; Gil de Paz, A.; Menéndez-Delmestre, K.; Seibert, M.; Mizusawa, T.; Kim, T.; Erroz-Ferrer, S.; Gadotti, D. A.; Athanassoula, E.; Bosma, A.; Ho, L. C. ARRAKIS: atlas of resonance rings as known in the S4G. Astronomy & Astrophysics. 19 February 2014, 562: A121. arXiv:1312.0866 . doi:10.1051/0004-6361/201321633.

[9] 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. arXiv:astro-ph/9704107 . doi:10.1086/313041.

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