3C 285

Last updated
3C 285
3C 285 NVAS 1.52I4.09 AV0127 1986AUG29 1 96.7U5.73M.jpg
3C 285 in radiowaves
Observation data (J2000 epoch)
Constellation Canes Venatici
Right ascension 13h 21m 17.813s [1]
Declination +42° 35′ 15.38″ [1]
Redshift 0.0794 [2]
Heliocentric radial velocity 23,799 ± 5 km/s [2]
Distance 323 megaparsecs (1.05×109  ly) h −1
0.73 [2]
Apparent magnitude  (V)16.23 [1]
Characteristics
Type rG, Rad, AGN, G, GiG, QSO [1]
G, FR II [2]
Apparent size  (V)0.417' x 0.242' [1]
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. [3]

Contents

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. [4] 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. [5] In the centre of 3C 285 lies a supermassive black hole whose mass is estimated to be 107.70±0.10 (40-63 million) M☉ based on stellar velocity dispersion. [6]

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. [7] The gas mass of the region is estimated to be less than 6.2×108  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. [8]

Related Research Articles

<span class="mw-page-title-main">3C 449</span> Radio galaxy in the constellation Lacerta

3C 449 is a low-redshift Fanaroff and Riley class I radio galaxy. It is thought to contain a highly warped circumnuclear disk surrounding the central active galactic nucleus (AGN). The name signifies that it was the 449th object of the Third Cambridge Catalog of Radio Sources (3C), published in 1959.

A super star cluster (SSC) is a very massive young open cluster that is thought to be the precursor of a globular cluster. These clusters called "super" because they are relatively more luminous and contain more mass than other young star clusters. The SSC, however, does not have to physically be larger than other clusters of lower mass and luminosity. They typically contain a very large number of young, massive stars that ionize a surrounding HII region or a so-called "Ultra dense HII region (UDHII)" in the Milky Way Galaxy or in other galaxies. An SSC's HII region is in turn surrounded by a cocoon of dust. In many cases, the stars and the HII regions will be invisible to observations in certain wavelengths of light, such as the visible spectrum, due to high levels of extinction. As a result, the youngest SSCs are best observed and photographed in radio and infrared. SSCs, such as Westerlund 1 (Wd1), have been found in the Milky Way Galaxy. However, most have been observed in farther regions of the universe. In the galaxy M82 alone, 197 young SSCs have been observed and identified using the Hubble Space Telescope.

<span class="mw-page-title-main">3C 171</span> Galaxy located in the constellation Lynx

3C 171 is a Seyfert galaxy located in the constellation Lynx, classfied as a radio galaxy, containing an extended emission-line region. It is also a relatively isolated galaxy, not belonging to any other rich galaxy clusters.

<span class="mw-page-title-main">3C 438</span> Galaxy in the constellation Cygnus

3C 438 is a Seyfert galaxy and Fanaroff and Riley class II radio galaxy located in the constellation Cygnus. The radio galaxy has two lobes and there is a radio jet leading to the south lobe, which also has a prominent double hot spot. There is age variation across the lobes.

<span class="mw-page-title-main">Hercules A</span>

Hercules A is a bright astronomical radio source in the constellation Hercules corresponding to the galaxy 3C 348.

<span class="mw-page-title-main">NGC 3862</span> Galaxy in the constellation Leo

NGC 3862 is an elliptical galaxy located 300 million light-years away in the constellation Leo. Discovered by astronomer William Herschel on April 27, 1785, NGC 3862 is an outlying member of the Leo Cluster.

<span class="mw-page-title-main">NGC 7469</span> Galaxy located in the constellation Pegasus

NGC 7469 is an intermediate spiral galaxy in the constellation of Pegasus. NGC 7469 is located about 200 million light-years away from Earth, which means, given its apparent dimensions, that NGC 7469 is approximately 90,000 light-years across. It was discovered by William Herschel on November 12, 1784.

<span class="mw-page-title-main">NGC 541</span> Galaxy in the constellation Cetus

NGC 541 is a lenticular galaxy located in the constellation Cetus. It is located at a distance of about 230 million light years from Earth, which, given its apparent dimensions, means that NGC 541 is about 130,000 light years across. It was discovered by Heinrich d'Arrest on October 30, 1864. It is a member of the Abell 194 galaxy cluster and is included in the Atlas of Peculiar Galaxies in the category galaxies with nearby fragments. NGC 541 is a radio galaxy of Fanaroff–Riley class I, also known as 3C 40A.

<span class="mw-page-title-main">NGC 545</span> Galaxy in the constellation Cetus

NGC 545 is a lenticular galaxy located in the constellation Cetus. It is located at a distance of about 250 million light years from Earth, which, given its apparent dimensions, means that NGC 545 is about 180,000 light years across. It was discovered by William Herschel on October 1, 1785. It is a member of the Abell 194 galaxy cluster and is included along with NGC 547 in the Atlas of Peculiar Galaxies.

<span class="mw-page-title-main">NGC 547</span> Galaxy in the constellation Cetus

NGC 547 is an elliptical galaxy and radio galaxy located in the constellation Cetus. It is located at a distance of about 220 million light years from Earth, which, given its apparent dimensions, means that NGC 547 is about 120,000 light years across. It was discovered by William Herschel on October 1, 1785. It is a member of the Abell 194 galaxy cluster and is included along with NGC 547 in the Atlas of Peculiar Galaxies.

<span class="mw-page-title-main">3C 120</span> Galaxy in the constellation Taurus

3C 120, also known as Markarian 1506, is an active galaxy located in the constellation of Taurus, at a distance of about 420 million light years. It has been categorised as a type I Seyfert galaxy and a broad-line radio galaxy. 3C 120 has been found to be a variable source in all wavelengths and hosts a superluminal jet.

<span class="mw-page-title-main">NGC 7236</span> Galaxy in the constellation Pegasus

NGC 7236 is an interacting lenticular galaxy located in the constellation Pegasus. It is located at a distance of about 300 million light years from Earth, which, given its apparent dimensions, means that NGC 7236 is about 150,000 light years across. NGC 7236 forms a pair with NGC 7237 and is a radio galaxy. It was discovered by Albert Marth on August 25, 1864.

<span class="mw-page-title-main">NGC 7237</span> Galaxy in the constellation Pegasus

NGC 7237 is an interacting lenticular galaxy located in the constellation Pegasus. It is located at a distance of about 350 million light years from Earth, which, given its apparent dimensions, means that NGC 7237 is about 240,000 light years across. NGC 7237 forms a pair with NGC 7236 and is a radio galaxy. It was discovered by Albert Marth on August 25, 1864.

<span class="mw-page-title-main">NGC 3801</span> Galaxy in the constellation Leo

NGC 3801 is a lenticular galaxy located in the constellation Leo. It is about 150 million light years from Earth, and estimated to be about 170,000 light years in diameter. William Herschel discovered it on 17 April 1784.

<span class="mw-page-title-main">MRC 0406-244</span> Radio galaxy producing an astrophysical jet in the constellation of Eridanus

MRC 0406-244 also known as TN J0408-2418, is a radio galaxy producing an astrophysical jet, located in the constellation of Eridanus. At its redshift of 2.44, it is roughly ten billion light years from Earth.

<span class="mw-page-title-main">4C +72.26</span> Radio galaxy in the constellation Draco

4C +72.26 known as NAME TX J1908+7220, is a radio galaxy located in the constellation Draco. At the redshift of 3.53, the galaxy is located roughly 11.5 billion light-years from Earth.

<span class="mw-page-title-main">4C +41.17</span> Radio galaxy in the constellation Auriga

4C +41.17 is a radio galaxy located in the constellation Auriga. With the redshift of 3.79, it is located nearly 11.7 billion light-years from Earth. At the time of its discovery in 1988, it was one of the most distant galaxies ever seen.

<span class="mw-page-title-main">PKS 1345+125</span> Galaxy merger in the constellation Boötes

PKS 1345+125 known as PKS 1345+12 and 4C +12.50, is an ultraluminous infrared galaxy (ULIG) with an active galactic nucleus, located in the constellation Boötes. With a redshift of 0.121740, the galaxy is located 1.7 billion light-years from Earth.

<span class="mw-page-title-main">3C 346</span> Galaxy in the constellation Hercules

3C 346 is an elliptical galaxy located in the constellation Hercules. It is located nearly 2.5 billion light years away from Earth and classified a Seyfert galaxy and a compact steep-spectrum source (CSS), although later studies confirm it as a Fanaroff-Riley class II source.

<span class="mw-page-title-main">3C 459</span> Radio galaxy in the constellation Pisces

3C 459 known as IRAS 23140+0348, is a radio galaxy located in the constellation Pisces. It is located 2.74 billion light years from Earth and is classified as a Seyfert 2 and LINER galaxy.

References

  1. 1 2 3 4 5 "Query : 3C 285". Simbad. Centre de Données astronomiques de Strasbourg . Retrieved 2 June 2015.
  2. 1 2 3 4 "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.


This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.