 | |
| Object type | Quasar ionization echo |
|---|---|
| Other designations | SDSS J094103.80+344334.2 |
| Constellation | Leo Minor  |
| 09h 41m 03.81s | |
| Declination | +34° 43′ 34.3″ |
| Distance | 650 Mly (199 Mpc) |
In visual light (V) | |
| 19 | |
Notable features | Associated with spiral galaxy IC 2497 |
 Related media on Wikimedia Commons | |
Hanny's Voorwerp /ˈhʌniz ˈvɔːrwɛərp/ (Dutch for Hanny's object) is a type of astronomical object called a quasar ionization echo.[1][2][3][4] It was discovered in 2007 by Dutch schoolteacher Hanny van Arkel while she was participating as a volunteer in the Galaxy Zoo project, part of the Zooniverse group of citizen science websites. Photographically, it appears as a bright blob close to spiral galaxy IC 2497 in the constellation Leo Minor.
- ^ G.I.G. Józsa; M.A. Garrett; T.A. Oosterloo; H. Rampadarath; H. van Arkel; C. Lintott; W.C. Keel; K. Schawinski; E. Edmondson (July 2009). "Revealing Hanny's Voorwerp: radio observations of IC 2497". Astronomy and Astrophysics. 500 (2): 33–36. arXiv:0905.1851. Bibcode:2009A&A...500L..33J. doi:10.1051/0004-6361/200912402. S2CID 54497211.
- ^ C.J. Lintott; K. Schawinski; W. Keel; H. van Arkel; N. Bennert; E. Edmondson; D. Thomas; D.J.B. Smith; P.D. Herbert; M.J. Jarvis; S. Virani; D. Andreescu; S.P. Bamford; K. Land; P. Murray; R.C. Nichol; M.J. Raddick; A. Slosar; A. Szalay; J. Vandenberg (September 2009). "Galaxy Zoo: 'Hanny's Voorwerp', a quasar light echo?". Monthly Notices of the Royal Astronomical Society. 399 (1): 129–140. arXiv:0906.5304. Bibcode:2009MNRAS.399..129L. doi:10.1111/j.1365-2966.2009.15299.x. S2CID 16752721.
- ^ Keel, W. C.; Lintott, C. J.; Schawinski, K.; Bennert, V. N.; Thomas, D.; Manning, A.; Chojnowski, S. D.; van Arkel, H.; Lynn, S. (August 2012). "The History and Environment of a Faded Quasar: Hubble Space Telescope Observations of Hanny's Voorwerp and IC 2497". The Astronomical Journal. 144 (2): 16. arXiv:1206.3797. Bibcode:2012AJ....144...66K. doi:10.1088/0004-6256/144/2/66. S2CID 51846989.
- ^ Rincon, P. (5 August 2008). "Teacher finds new cosmic object". BBC News. Retrieved 19 October 2012.