HE 0437-5439
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 HE0437-5439 |
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| Observation data Epoch J2000.0 (ICRS) |
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|---|---|
| Constellation (pronunciation) |
Dorado |
| Right ascension | 04h 38m 12.772s[1] |
| Declination | -54° 33′ 11.86″ |
| Astrometry | |
| Spectral type | BV |
| Apparent magnitude (V) | 16.3 |
| Distance | 200.000 Ly |
| Details | |
| Mass | 8 M☉ |
| Radius | ? R☉ |
| Luminosity | ? L☉ |
| Temperature | ? K |
| Metallicity | ? |
| Rotation | ? |
| Age | 25 million years |
| Other designations | |
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GSC2 S01132011256, HE 0437-5439, [BGK2006] HV 3.
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| Database references | |
| SIMBAD | data |
HE 0437-5439 is a massive, unbound hypervelocity main sequence B-type star. It was discovered in 2005 with the Kueyen 8.2 m telescope, which is part of the ESO VLT array. HE 0437-5439 is a young star at around 30 million years old.[2] The mass of the star is almost nine times greater than the mass of the Sun[3] and is 200,000 light years away in the direction of the Dorado constellation, 16 degrees northwest of the Large Magellanic Cloud (LMC) and further away than the LMC.[2] The star appears to be receding at an extremely high velocity of 723 km/s, or 2.6 million kilometres per hour. At this speed, the star is no longer gravitationally bound and will leave the Milky Way galaxy system and escape into intergalactic space. It may have originated in the LMC and been ejected from it soon after birth. This could happen if it originally was one of a pair of stars and if there is a supermassive black hole in the LMC.[3]
[edit] References
- ^ The Optical Gravitational Lensing Experiment. Additional Planetary and Low-Luminosity Object Transits from the OGLE 2001 and 2002 Observational Campaigns, A. Udalski, G. Pietrzynski, M. Szymanski, M. Kubiak, K. Zebrun, I. Soszynski, O. Szewczyk, and L. Wyrzykowski, Acta Astronomica 53 (June 2003), pp. 133–149.
- ^ a b European Southern Observatory (2005-11-09). "Star on the Run - Speeding Star Observed with VLT Hints at Massive Black Hole". Press release. Retrieved on 2008-01-28.
- ^ a b "Hyperfast Star Proven To Be Alien", Space & Time, Science Daily, 2008-01-28. Retrieved on 2008-01-28.
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