| 翻訳と辞書 |
IC 2497
IC 2497 is a spiral galaxy〔BBC News, ("Teacher finds new cosmic object" ), Paul Rincon, ''5 August 2008'' (accessed 2010-11-11)〕 close to the intergalactic cloud Hanny's Voorwerp.〔SIMBAD, ("IC 2497" ) (accessed 2010-11-11)〕
IC 2497 is a former quasar, whose light lit up Hanny's Voorwerp, which is now a light echo of that extinct quasar.〔ScienceDaily, ("Cosmic Curiosity Reveals Ghostly Glow of Dead Quasar" ), ''6 November 2010'' (accessed 2010-11-10)〕 It is about away from Hanny's Voorwerp.〔Softpedia, ("Shut Down Quasar Found Close By" ), Tudor Vieru, ''3 November 2010'' (accessed 2010-10-11)〕 The quasar shut down sometime in the last 70,000 years.〔Universe Today, ("What Hanny’s Voorwerp Reveals About Quasar Deaths" ), Jon Voisey, ''3 November 2010'' (accessed 2010-11-11)〕 This revises current theories of quasar operation, as the quasar is quiescient, shutting down much faster than was thought possible,〔ECN Magazine, ("Cosmic Curiosity Reveals Ghostly Glow of Dead Quasar" ), Yale University, ''3 November 2010'' (accessed 2010-11-11)〕 and is much cooler than predicted.〔 The galaxy is currently 100 to 10,000 times dimmer than it was when its quasar burned into Hanny's Voorwerp.〔Wired, ("Rare Dead Quasar Found in Nearby Galaxy" ), Lisa Grossman, ''2 November 2010'' (accessed 2010-11-11)〕 It is currently the nearest known quasar, being 730 million light years away, and the one with the best view of its host galaxy.〔 The nearest active quasar is 3C 273, 1.7 billion light years further away.〔PhysOrg, ("'Cosmic ghost' discovered by volunteer astronomer" ), Yale University, ''5 August 2008'' (accessed 2010-10-11)〕
== References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「IC 2497」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|