NGC 3489

NGC 3489
NGC 3489
	哈勃太空望遠鏡拍攝的NGC 3489
觀測資料（J2000 曆元）
星座	獅子座
赤經	11h 00m 18.6s
赤緯	+13° 54′ 04″
紅移	0.002258 ± 0.000006
徑向速度	677 ± 2 km/s
距離	29 ± 8.4 Mly (8.9 ± 2.6 Mpc)
視星等 (V)	10.2
特徵
類型	SAB(rs)0+
角直徑 (V)	3′.5 × 2′.0
其他名稱
	UGC 6082, CGCG 066-084, MCG +02-28-039, PGC 33160
	參見：星系、星系列表

NGC 3489是位於獅子座的一個透鏡星系。它距離地球約3,000萬光年，考慮到其外觀尺寸，這意味着NGC 3489的寬度約為30,000光年。它是由威廉·赫歇爾（William Herschel）於1784年4月8日發現的。^[3]NGC 3489是獅子座星系團的成員之一。^[4]

NGC 3489有一個薄弱的星系扁球體，沿短軸看，有一個小旋臂。^[5] NGC 3489中恆星的年齡呈梯度變化，越年輕的恆星越靠近核心。在巴耳末系中觀察時，NGC 3489的中央的角速度顯示一個峰值，表明在其核心存在較年輕的恆星，其年齡估計約為17億年。^[6]儘管目前NGC 3489被認為是星暴星系，但在星系核心中仍然存在可以導致恆星形成的分子雲，儘管它的質量小於星系中的活躍恆星形成的質量。^[7]在NGC 3489的核心區域中，觀察到具有開放螺旋形形態的塵埃。^[6]星系具有外環結構，沿主軸線的直徑為1.54弧分鐘。^[8]

NGC 3489具有活動星系核，根據其光譜被歸類為2型塞弗特星系，或者根據其星系核心的發射強度介於電離氫區核和低電離星系核之間，歸類為一個過渡性天體。^[9] 這種過渡性的發射光譜可歸因於位於星系核心的漸近巨星分支。^[7]人們認為，在星系中心積聚物質的超大質量黑洞是造成星系核活動的原因。在NGC 3489的中心，有一個黑洞，根據速度離散估計質量為（6±0.54）×106M☉。^[5]

參考資料

^ ^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]. （原始內容存檔於2019-01-04）.
^ Revised NGC Data for NGC 3489. spider.seds.org. [25 November 2018]. （原始內容存檔於2020-07-03）.
^ Seligman, Courtney. NGC 3489. Celestial Atlas. [19 November 2018]. （原始內容存檔於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.

外部連結

WikiSky上關於NGC 3489的內容：DSS2, SDSS, GALEX, IRAS, 氫α, X射線, 天文照片, 天圖, 文章和圖片
NGC 3489 on SIMBAD（頁面存檔備份，存於互聯網檔案館）

[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]. （原始內容存檔於2019-01-04）.

[seds-2] Revised NGC Data for NGC 3489. spider.seds.org. [25 November 2018]. （原始內容存檔於2020-07-03）.

[Seligman-3] Seligman, Courtney. NGC 3489. Celestial Atlas. [19 November 2018]. （原始內容存檔於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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