 HD 101584 seen by ALMA. The blue component moves towards the observer and the red component moves away from the observer. The green component has the same speed as the binary system, seen as a green point source in the middle. Credit: ALMA (ESO/NAOJ/NRAO), Olofsson et al. Acknowledgement: Robert Cumming | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 11h 40m 58.80515s[1] |
| Declination | −55° 34′ 25.8147″[1] |
| Apparent magnitude (V) | 7.01 |
| Characteristics | |
| Spectral type | A6Ia[2] |
| Astrometry | |
| Proper motion (μ) | RA: −7.935[1] mas/yr Dec.: −0.243[1] mas/yr |
| Parallax (π) | 0.5452 ± 0.0199 mas[1] |
| Distance | 6,000 ± 200 ly (1,830 ± 70 pc) |
| Details | |
| supergiant | |
| Mass | 0.5 - 1[3] M☉ |
| Radius | 18.6[3] R☉ |
| Luminosity | 1,600 L☉ (@1kpc) (400 - 5,000)[3] L☉ |
| Temperature | 8,500[4] K |
| companion | |
| Mass | 0.27 - 0.41[3] M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 101584 is a suspected post-common envelope binary about 1,800 to 5,900 light-years distant in the constellation of Centaurus.[3][5] The system is bright at optical wavelengths with an apparent visual magnitude of about 7. The primary is either a post-AGB star, but more likely a post-RGB star. The secondary is a red dwarf or possibly a low-luminosity white dwarf, which orbits the primary every 150-200 days. The system is surrounded by a slowly rotating circumbinary disk, probably with a face-on orientation towards the solar system and a size of about 150 astronomical units.[3]
- ^ a b c d e 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.
- ^ Sivarani, T.; Parthasarathy, M.; García-Lario, P.; Manchado, A.; Pottasch, S. R. (June 1999). "Spectroscopy of the post-AGB star HD 101584 (IRAS 11385-5517)". Astronomy and Astrophysics Supplement Series. 137 (3): 505–519. arXiv:astro-ph/9907310. Bibcode:1999A&AS..137..505S. doi:10.1051/aas:1999259. ISSN 0365-0138. S2CID 16274320.
- ^ a b c d e f Olofsson, H.; Khouri, T.; Maercker, M.; Bergman, P.; Doan, L.; Tafoya, D.; Vlemmings, W. H. T.; Humphreys, E. M. L.; Lindqvist, M.; Nyman, L.; Ramstedt, S. (March 2019). "HD 101584: circumstellar characteristics and evolutionary status". Astronomy & Astrophysics. 623: A153. arXiv:1902.02153. Bibcode:2019A&A...623A.153O. doi:10.1051/0004-6361/201834897. ISSN 0004-6361. S2CID 102480818.
- ^ Olofsson, H.; Black, J. H.; Khouri, T.; Vlemmings, W. H. T.; Humphreys, E. M. L.; Lindqvist, M.; Maercker, M.; Nyman, L.; Ramstedt, S.; Tafoya, D. (2021). "Heavy-element Rydberg transition line emission from the post-giant-evolution star HD 101584". Astronomy and Astrophysics. 651: A35. arXiv:2105.00699. Bibcode:2021A&A...651A..35O. doi:10.1051/0004-6361/202140537. S2CID 233481052.
- ^ "ALMA catches beautiful outcome of stellar fight". Atacama Large Millimeter/submillimeter Array.