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Revision as of 22:18, 16 April 2024 by Mightyname (talk | contribs)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff) Binary system in Aquila| Observation data Epoch J2016.0 Equinox J2016.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 19 39 18.72 |
| Declination | +14° 55′ 54.2″ |
| Characteristics | |
| K2 star | |
| Evolutionary stage | K2 |
| Black hole | |
| Evolutionary stage | Stellar black hole |
| Astrometry | |
| Orbit | |
| Period (P) | 11.6 yr |
| Semi-amplitude (K1) (primary) | 25.23±0.04 km/s |
| Details | |
| K2 | |
| Mass | 0.76±0.05 M☉ |
| Black hole | |
| Mass | 32.70±0.82 M☉ |
| Other designations | |
| Gaia BH3, 2MASS J19391872+1455542, Gaia DR3 4318465066420528000, LS II +14 13 | |
| Database references | |
| SIMBAD | data |
Gaia BH3 (Gaia DR3 4318465066420528000) is a binary system consisting of a metal-poor K2 star and what is very likely a stellar-mass black hole. Gaia BH3 is located about 1839 light years away (0.5906±0.0058 kpc away) in the constellation of Aquila, making it as of 2024 the heaviest known black hole system second-closest to Earth. Gaia BH3 is the third black hole discovered from Gaia DR3 astrometric data.
The black hole and star orbit the system barycentre about every 11.6 years. The black hole's mass is around 32.70 M☉, the heaviest stellar black hole recorded to date in the Milky Way.
Discovery
Gaia BH3 was originally found by astrometric observations with Gaia in 2015 and became a black hole binary candidate by the European Space Agency on 16 April, 2024.
References
- ^ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ Panuzzo, z; Panuzzo (2024). "Discovery of a dormant 33 solar-mass black hole in pre-release Gaia astrometry". The Astrophysical Journal. doi:10.1051/0004-6361/202449763.
- "Most massive stellar black hole in our galaxy found". European Southern Observatory. 16 April 2024. Archived from the original on 16 April 2024.
