Misplaced Pages

3C 285
3C 285 in radiowaves
Observation data (J2000 epoch)
Constellation	Canes Venatici
Right ascension	13 21 17.813
Declination	+42° 35′ 15.38″
Redshift	0.0794
Heliocentric radial velocity	23,799 ± 5 km/s
Distance	323 megaparsecs (1.05×10 ly) h 0.73
Apparent magnitude (V)	16.23
Characteristics
Type	rG, Rad, AGN, G, GiG, QSO G, FR II
Apparent size (V)	0.417' x 0.242'
Other designations
DA 343, LEDA 46625, 3C 285, 4C +42.37, 2MASX J13211781+4235153

3C 285 is a radio galaxy located in the constellation Canes Venatici. It is located about 1 bilion light years away. It is a Fanaroff-Riley 2 radio galaxy and is hosted in a disturbed spiral galaxy.

3C 285 is the brightest member of a small galaxy group. Its morphology is peculiar, with an S-shaped envelope that points to another galaxy of the group, located to the northwest. A gas filament 26 arcseconds long extends towards that galaxy. In optical and ultraviolet observations the galaxy features dust lanes, two across the galaxy and one perpendicular to them that also obscures part of the nucleus. Along the edges of the dust lanes knots of elevated ultraviolet emission indicate locations of where new stars are formed. In the centre of 3C 285 lies a supermassive black hole whose mass is estimated to be 10 (40-63 million) M_☉ based on stellar velocity dispersion.

When observed in radiowaves, 3C 285 has two lobes with filamentary structures in them, and a jet is visible in the eastern lobe. A blue star forming region, named 3C 285/09.6, has been detected within the eastern radio lobe, and it has been suggested that the star formation was induced by the compression of a region of dense intergalactic gas by the radio jet. The gas mass of the region is estimated to be less than 6.2×10 M_☉ based on CO imaging and so it is estimated to be depleted if star formation continues at the current rate in less than a bilion years.

Gallery

• 3C 285 by the Hubble Space Telescope
• 3C 285 with its galaxy group

References

1. ^ "Query : 3C 285". Simbad. Centre de Données astronomiques de Strasbourg. Retrieved 2 June 2015.
2. ^ "NED results for object 3C 285". NASA/IPAC Extragalactic Database. Retrieved 2 June 2015.
3. Hardcastle, M. J.; Kraft, R. P.; Worrall, D. M.; Croston, J. H.; Evans, D. A.; Birkinshaw, M.; Murray, S. S. (10 June 2007). "The Interaction between Radio Lobes and Hot Gas in the Nearby Radio Galaxies 3C 285 and 3C 442A". The Astrophysical Journal. 662 (1): 166–181. arXiv:astro-ph/0703080. Bibcode:2007ApJ...662..166H. doi:10.1086/517997.
4. Baum, Stefi Alison; Heckman, Timothy M.; Bridle, Alan; van Breugel, Wil J. M.; Miley, George K. (December 1988). "Extended optical-line-emitting gas in radio galaxies - Broad-band optical, narrow-band optical, and radio imaging of a representative sample". The Astrophysical Journal Supplement Series. 68: 643. Bibcode:1988ApJS...68..643B. doi:10.1086/191301.
5. Allen, Mark G.; Sparks, William B.; Koekemoer, Anton; Martel, Andre R.; O’Dea, Christopher P.; Baum, Stefi A.; Chiaberge, Marco; Macchetto, F. Duccio; Miley, George K. (April 2002). "Ultraviolet Hubble Space Telescope Snapshot Survey of 3CR Radio Source Counterparts at Low Redshift". The Astrophysical Journal Supplement Series. 139 (2): 411–438. arXiv:astro-ph/0112208. Bibcode:2002ApJS..139..411A. doi:10.1086/338823.
6. Mezcua, M.; Lobanov, A. P.; Chavushyan, V. H.; León-Tavares, J. (March 2011). "Black hole masses and starbursts in X-shaped radio sources". Astronomy & Astrophysics. 527: A38. arXiv:1008.0977. Bibcode:2011A&A...527A..38M. doi:10.1051/0004-6361/201015535.
7. van Breugel, Wil J. M.; Dey, Arjun (September 1993). "Induced star formation in a radio lobe of 3C 285?". The Astrophysical Journal. 414: 563. Bibcode:1993ApJ...414..563V. doi:10.1086/173103.
8. Salomé, Q.; Salomé, P.; Combes, F. (February 2015). "Jet-induced star formation in 3C 285 and Minkowski's Object". Astronomy & Astrophysics. 574: A34. arXiv:1410.8367. Bibcode:2015A&A...574A..34S. doi:10.1051/0004-6361/201424932.

External links

• www.jb.man.ac.uk/atlas/

v t e Constellation of Canes Venatici
Canes Venatici in Chinese astronomy Giant Void List of stars in Canes Venatici
Stars	Bayer α α (Cor Caroli) β (Chara) Flamsteed 4 5 6 10 19 20 21 24 25 Variable R Y (La Superba) RS AM AW BH DG HR 4997 Other Gliese 521 HAT-P-12 HAT-P-36 (Tuiren) CWISE J1249+3621
Exoplanets HAT-P-12b
Star clusters Messier 3
Galaxies	Messier 51 a (Whirlpool Galaxy) b 63 94 106 NGC 4111 4138 4145 4151 4163 4183 4214 4217 4242 4244 4395 4399 4400 4401 4449 4485 4490 4534 4618 4625 4627 4631 4656 4657 4707 4800 4861 5002 5003 5005 5023 5033 5112 5223 5229 5238 5273 5371 5394 Numbered I II Other 3C 285 3C 286 3C 288 DDO 169 IC 883 IC 4182 IC 4263 IC 4271 I Zwicky 36 KKR 03 4C +41.26 TON 618
Galaxy clusters Canes II Group M51 Group M94 Group NGC 4631 Group
Astronomical events GRB 090429B SN 1994I SN 2005cs SN 2008ax
Category

• Radio galaxies
• Canes Venatici
• 3C objects
• 4C objects
• LEDA objects
• Principal Galaxies Catalogue objects