Astronomy:NGC 3842

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NGC 3842
legacy surveys image of NGC 3842 (center). The image also shows NGC 3837, NGC 3841, NGC 3844, NGC 3845, NGC 3851 and UGC 6697
Observation data (J2000 epoch)
ConstellationLeo
Right ascension 11h 44m 02.2s[1]
Declination19° 56′ 59.3″[1]
Redshift0.021068 ± 0.000031[1]
Helio radial velocity6316 ± 9 km/s[1]
Distance325 Mly (99.6 Mpc)
Group or clusterLeo Cluster
Apparent magnitude (V)12.78[1]
Characteristics
TypeE[1]
Apparent size (V)1.4 x 1.0[1]
Notable featuresbrightest member of the Leo Cluster, has a 34.6 billion solar mass black hole
Other designations
UGC 6704, PGC 36487, MCG 3-30-72, ZWG 97.95,[1]

NGC 3842 is an elliptical galaxy in the constellation of Leo. It was discovered by William Herschel. It is notable for containing one of the largest black holes ever detected, reported to have a current estimated mass of 34.6+63.0
−22.4 billion solar masses (M☉) based on the break radius method (with the range being 12.2 billion M☉ to 97.6 billion M☉).[2][3] Previous estimates yield at least 9.7+3.0
−2.5 billion solar masses (M☉).[4] It is around 330 million light-years (101.18 million parsecs) distant from Earth.

NGC 3842 is the brightest member[5] of the Leo Cluster.[6][7]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 "NASA/IPAC Extragalactic Database". Results for NGC 3842. http://nedwww.ipac.caltech.edu/. 
  2. ↑ Dullo, B.T. (22 November 2019). "The Most Massive Galaxies with Large Depleted Cores: Structural Parameter Relations and Black Hole Masses". The Astrophysical Journal 886 (2): 80. doi:10.3847/1538-4357/ab4d4f. Bibcode: 2019ApJ...886...80D. 
  3. ↑ Dullo, B.T.; de Paz, A.G.; Knapen, J.H. (18 February 2021). "Ultramassive black holes in the most massive galaxies: MBH−σ versus MBH−Rb". The Astrophysical Journal 908 (2): 134. doi:10.3847/1538-4357/abceae. Bibcode: 2021ApJ...908..134D. 
  4. ↑ Rincon, Paul (2011-12-05). "Team sees biggest black holes yet". bbc.co.uk. https://www.bbc.co.uk/news/science-environment-16034045. 
  5. ↑ "NGC 3842". http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC%203842. 
  6. ↑ "Are You Ready, Willing, and Abell? - Sky & Telescope" (in en-US). Sky & Telescope. 2017-04-26. http://www.skyandtelescope.com/observing/are-you-ready-willing-and-abell/. 
  7. ↑ "Record massive black holes discovered lurking in monster galaxies" (in en-US). Berkeley News. 2011-12-05. http://news.berkeley.edu/2011/12/05/record-black-holes-bigger-than-our-solar-system/. 

Coordinates: Sky map 11h 40m 44.2s, +22° 25′ 46″




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