| Hen 2-10 | |
|---|---|
.jpg) A composite image of Hen 2-10. Visual data comes from the Hubble Space Telescope, X-ray data comes from the Chandra X-Ray Observatory, and radio data comes from the Very Large Array. | |
| Observation data (J2000 epoch) | |
| Constellation | Pyxis |
| Right ascension | 08h 36m 15s [1] |
| Declination | −26° 24′ 34″[1] |
| Redshift | 0.002912[1] |
| Heliocentric radial velocity | 873 km/s[1] |
| Galactocentric velocity | 657 km/s[1] |
| Distance | 34.24 Mly[1] |
| Apparent magnitude (V) | 11.09 (R Band)[1] |
| Characteristics | |
| Type | dwarf |
| Mass | ~1×1010[2] M☉ |
| Apparent size (V) | 1.8'[1] |
| Other designations | |
| ESO 495-21, MCG-04-21-005, PGC 24171/24175 [1] | |
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Hen 2-10, also known as He 2-10 and Henize 2-10, is a dwarf starburst galaxy located 34 million light years away in the constellation of Pyxis.[1] The galaxy is believed to be an early stage starburst galaxy. A black hole was later discovered near the center of the dwarf galaxy, suggesting that the black holes found at the center of most large galaxies may have formed before the galaxies themselves.[3] Recent estimates have placed the mass of this black hole around 3×106 M☉, and the mass of the entire dwarf galaxy at about 1×1010 M☉.[2]
- ^ a b c d e f g h i j "NED entry for HE 2-10". Retrieved 1 June 2011.
- ^ a b Reines, Amy E.; Reynolds, Mark T.; Miller, Jon M.; Sivakoff, Gregory R.; Greene, Jenny E.; Hickox, Ryan C.; Johnson, Kelsey E. (2016). "Deep Chandra Observations of the Compact Starburst Galaxy Henize 2-10: X-rays from the Massive Black Hole". The Astrophysical Journal Letters. 830 (2): L35. arXiv:1610.01598. Bibcode:2016ApJ...830L..35R. doi:10.3847/2041-8205/830/2/L35. S2CID 118419430.
- ^ Grossman, Lisa (10 January 2011). "Baby Galaxy Hosts Monster Black Hole". Wired News. Retrieved 3 July 2011.