IC 2497
| IC 2497 | |
|---|---|
 | |
| Observation data (J2000.0[1]epoch) | |
| Constellation | Leo Minor[2] |
| Right ascension | 09h41m04.076s[1] |
| Declination | +34° 43′ 58.57″[1] |
| Redshift | 0.051633[1] |
| Distance | 650Mly(199.29Mpc) |
| Characteristics | |
| Apparent size(V) | 0.390'× 0.320'[1] |
| Other designations | |
| IRAS09380+3457,2MASXJ09410407+3443585,IC2497,LEDA165538,PGC165538 | |
IC 2497is aspiral galaxy[3]close to the intergalactic cloudHanny's Voorwerp.[1]The galaxy is a formerquasar,whose light lit up Hanny's Voorwerp, which is now a light echo of that extinct quasar.[4]It is about 45,000–70,000 light-years (14,000–21,000 pc) away from Hanny's Voorwerp.[5]The quasar shut down sometime in the last 70,000 years.[6]This revises current theories of quasar operation, as the quasar is quiescent, shutting down much faster than was thought possible,[7]and is much cooler than predicted.[5]The galaxy is currently 100 to 10,000 times dimmer than it was when its quasar burned into Hanny's Voorwerp.[8]
Onesupernovahas been observed in IC 2497: SN 2020ilb (type Ia,mag. 19) was discovered on 29 April 2020.[9]
References
[edit]- ^abcdef"IC 2497".SIMBAD.Centre de données astronomiques de Strasbourg.Retrieved2010-11-11.
- ^Davide De Martin (2007)."IC 2497".Sky Factory.Retrieved2010-11-11.
- ^Paul Rincon (5 August 2008)."Teacher finds new cosmic object".BBC News.Retrieved2010-11-11.
- ^"Cosmic Curiosity Reveals Ghostly Glow of Dead Quasar".ScienceDaily.6 November 2010.Retrieved2010-11-10.
- ^abTudor Vieru (3 November 2010)."Shut Down Quasar Found Close By".Softpedia.Retrieved2010-10-11.
- ^Jon Voisey (3 November 2010)."What Hanny's Voorwerp Reveals About Quasar Deaths".Universe Today.Retrieved2010-11-11.
- ^"Cosmic Curiosity Reveals Ghostly Glow of Dead Quasar".ECN Magazine.Yale University. 3 November 2010. Archived fromthe originalon 2011-07-19.Retrieved2010-11-11.
- ^Lisa Grossman (2 November 2010)."Rare Dead Quasar Found in Nearby Galaxy".Wired.Retrieved2010-11-11.
- ^2020ilb Transient Name Server entry for SN SN 2020ilb.Retrieved 26 March 2023.
Further reading
[edit]- Schawinski, K.; et al. (2010)."The Sudden Death of the Nearest Quasar".The Astrophysical Journal Letters.724(1): L30–L33.arXiv:1011.0427.Bibcode:2010ApJ...724L..30S.doi:10.1088/2041-8205/724/1/L30.
- Rampadarath, H.; et al. (2010)."Hanny's Voorwerp".Astronomy and Astrophysics.517:L8.arXiv:1006.4096.Bibcode:2010A&A...517L...8R.doi:10.1051/0004-6361/201014782.
- Józsa, G. I. G.; et al. (2009)."Revealing Hanny's Voorwerp: Radio observations of IC 2497".Astronomy and Astrophysics.500(2): L33–L36.arXiv:0905.1851.Bibcode:2009A&A...500L..33J.doi:10.1051/0004-6361/200912402.
External links
[edit]
Media related toIC 2497at Wikimedia Commons
