For faster navigation, this Iframe is preloading the Wikiwand page for OJ 287.

OJ 287

OJ 287
OJ 287示意圖
觀測資料(曆元 J2000)
星座巨蟹座
赤經08h 54m 48.9s[1]
赤緯+20° 06′ 31″[1]
紅移0.306000 [1]
距離3.5 Gly(1.073 Gpc
類型蠍虎座BL型天體[1]
視星等 (V)14[1]
其他编号
EGO 0851+202[1], 3EG J0853+1941[1], RGB J0854+201[1]
参见:類星體類星體列表

OJ 287 是一個蠍虎座BL型天體,質量是太陽的180億倍[2],並且有很長期的觀測數據。從1891年就有乾版的影像記錄,它的光度記錄超過了100年的時期,使它成為星系天文學中极为精緻的一個目標。至2008年,它的中心一直是被精確測量過質量最为巨大的超大質量黑洞,超過早先被認為质量最大黑洞的六倍以上[2]

光學的光度曲線顯示OJ287有11-12年的週期變化,最大光度有一個狹宰的雙峰值。[3] 這種變化被認為是另一個超大質量黑洞引起的,一個質量較小約為一億個MSun的黑洞以11-12年的週期環繞著這個大的黑洞。當小的夥伴在近星點附近穿越大黑洞的吸積盤時就會使光度增加。

芬蘭圖爾拉天文台英语Tuorla Observatory毛里·瓦多寧英语Mauri Valtonen和他團隊的質量計算結果在美國天文學會(AAS)第211次的會議中被公佈[4] 這些爆發的時間使伴星橢圓軌道的進動(每一週期39°)可以依據愛因斯坦廣義相對論被推算出(參考在廣義相對論中的克卜勒問題) [2]

這次的測量由於伴星軌道週期與有效數字的精確度而被質疑,但是計算的結果可以使未來的測量更精準。伴星的軌道會因為重力輻射而衰減,預估大約在10,000年左右就會與中央的黑洞合併[2]

這項研究的論文已經發表在天文物理期刊[5]

參考資料

[编辑]
  1. ^ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 NASA/IPAC Extragalactic Database. Results for OJ +287. [2008-07-10]. (原始内容存档于2018-12-25). 
  2. ^ 2.0 2.1 2.2 2.3 Shiga, David. Biggest black hole in the cosmos discovered. NewScientist.com news service. 10 January 2008 [2008-09-19]. (原始内容存档于2008-05-14). 
  3. ^ Shi, Weizhao; Liu, Xiang; Song, Huagang. A new model for the periodic outbursts of the BL Lac object OJ287. Astrophysics and Space Science. 2007, 310 (1-2): 59–63. doi:10.1007/s10509-007-9413-z. 
  4. ^ Huge black hole tips the scales. BBC. 2008-01-10 [2008-01-10]. (原始内容存档于2008-01-15). 
  5. ^ Valtonen, M. J.; Lehto, H. J.; Sillanpää, A.; Nilsson, K.; Mikkola, S.; Hudec, R.; Basta, M.; Teräsranta, H.; Haque, S.; Rampadarath, H. Predicting the Next Outbursts of OJ 287 in 2006-2010. The Astrophysical Journal. 2006年7月, 646 (1): 36–48. doi:10.1086/504884. .

外部連結

[编辑]
{{bottomLinkPreText}} {{bottomLinkText}}
OJ 287
Listen to this article

This browser is not supported by Wikiwand :(
Wikiwand requires a browser with modern capabilities in order to provide you with the best reading experience.
Please download and use one of the following browsers:

This article was just edited, click to reload
This article has been deleted on Wikipedia (Why?)

Back to homepage

Please click Add in the dialog above
Please click Allow in the top-left corner,
then click Install Now in the dialog
Please click Open in the download dialog,
then click Install
Please click the "Downloads" icon in the Safari toolbar, open the first download in the list,
then click Install
{{::$root.activation.text}}

Install Wikiwand

Install on Chrome Install on Firefox
Don't forget to rate us

Tell your friends about Wikiwand!

Gmail Facebook Twitter Link

Enjoying Wikiwand?

Tell your friends and spread the love:
Share on Gmail Share on Facebook Share on Twitter Share on Buffer

Our magic isn't perfect

You can help our automatic cover photo selection by reporting an unsuitable photo.

This photo is visually disturbing This photo is not a good choice

Thank you for helping!


Your input will affect cover photo selection, along with input from other users.

X

Get ready for Wikiwand 2.0 🎉! the new version arrives on September 1st! Don't want to wait?