Sakurai's Object
star
Sakuri's Object, also known as V4334 Sagittarii, is a star in the Sagittarius constellation.[7][8][9][10][11][12][13]
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 17h 52m 32.69s[1] |
| Declination | −17° 41′ 08.0″[1] |
| Apparent magnitude (V) | 10.90 - 21[2] |
| Characteristics | |
| Spectral type | variable |
| Apparent magnitude (J) | 11.555 ± 0.022[1] |
| U−B color index | +0.27[3] |
| B−V color index | +0.81[3] |
| V−R color index | +0.57[3] |
| Astrometry | |
| Radial velocity (Rv) | −170 ± 30[4] km/s |
| Distance | 1800-5000[5] pc |
| Details | |
| Mass | 0.6[6] M☉ |
| Luminosity | ~10,000 L☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
It is thought it was a white dwarf that swelled and became a red giant. It is at the center of a planetary nebula. Sakurai's Object and other similar stars are expected to end up as helium-rich white dwarfs. They go through a "born-again" giant phase back to the white dwarf cooling track.
Sakuri's Object was discovered in 1996.[14]
References
change- ↑ 1.0 1.1 1.2 Cutri, R. M.; Skrutskie, M. F.; Van Dyk, S.; Beichman, C. A.; Carpenter, J. M.; Chester, T.; Cambresy, L.; Evans, T.; Fowler, J.; Gizis, J.; Howard, E.; Huchra, J.; Jarrett, T.; Kopan, E. L.; Kirkpatrick, J. D.; Light, R. M.; Marsh, K. A.; McCallon, H.; Schneider, S.; Stiening, R.; Sykes, M.; Weinberg, M.; Wheaton, W. A.; Wheelock, S.; Zacarias, N. (2003). "VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)". VizieR On-line Data Catalog: II/246. Originally Published in: 2003yCat.2246....0C. 2246. Bibcode:2003yCat.2246....0C.
- ↑ Samus, N. N.; Durlevich, O. V. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
- ↑ 3.0 3.1 3.2 Arkhipova, V. P.; Noskova, R. I. (1997). "UBV photometry of Sakurai's object in 1996 and remarks about its evolutionary status". Astronomy Letters. 23 (5): 623. Bibcode:1997AstL...23..623A.
- ↑ Eyres, S. P. S.; Geballe, T. R.; Tyne, V. H.; Evans, A.; Smalley, B.; Worters, H. L. (May 2004). "Warm high-velocity CO in the wind of Sakurai's Object (= V4334 Sgr)". Monthly Notices of the Royal Astronomical Society. 350 (1): L9–L12. arXiv:astro-ph/0403439. Bibcode:2004MNRAS.350L...9E. doi:10.1111/j.1365-2966.2004.07808.x. S2CID 18500269.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ↑ van Hoof, P. A. M.; Hajduk, M. (2007). "The onset of photoionization in Sakurai's Object (V4334 Sagittarii)". Astronomy & Astrophysics. 471 (1): L9–L12. arXiv:0706.3857. Bibcode:2007A&A...471L...9V. doi:10.1051/0004-6361:20077932. S2CID 119324745.
- ↑ Herwig, Falk (2011). "Convective-reactive proton-12C combustion in Sakurai's Object (V4334 Sagittarii) and implications for the evolution and yields from the first generations of stars". The Astrophysical Journal. 727 (2): 89. arXiv:1002.2241. Bibcode:2011ApJ...727...89H. doi:10.1088/0004-637X/727/2/89. S2CID 51428014.
- ↑ information@eso.org. "Sakurai's Object: A Once-in-a-Llifetime Experience - The Story of a Rarely Seen Stellar Explosion". eso.org. Retrieved 2019-01-16.
- ↑ "'Inside out' nebula points to 'born again' star". Physics World. 2018-08-11. Retrieved 2019-01-16.
- ↑ "Sakurai's Object". iopscience.iop.org. doi:10.1086/310241. S2CID 121491943. Retrieved 2019-01-16.
- ↑ "Sakurai's Object Evolution Witnessed in Real Time". IFLScience. Retrieved 2019-01-16.
- ↑ "Sakurai's Object | StarDate Online". stardate.org. Archived from the original on 2020-09-20. Retrieved 2019-01-16.
- ↑ Hajduk, Marcin; Zijlstra, Albert A.; Herwig, Falk; van Hoof, Peter A. M.; Kerber, Florian; Kimeswenger, Stefan; Pollacco, Don L.; Evans, Aneurin; Lopéz, José A. (2005-04-08). "The real-time stellar evolution of Sakurai's object". Science (New York, N.Y.). 308 (5719): 231–233. Bibcode:2005Sci...308..231H. doi:10.1126/science.1108953. ISSN 1095-9203. PMID 15821085. S2CID 45275698.
- ↑ Hinkle, Kenneth H.; Joyce, Richard R.; Matheson, Thomas (2017-01-01). "Sakurai's Object Continues to Brighten and Expand". American Astronomical Society Meeting Abstracts #229. 229: 154.11. Bibcode:2017AAS...22915411H.
- ↑ Van de Steene, G. C.; van Hoof, P. A. M.; Kimeswenger, S.; Zijlstra, A. A.; Avison, A.; Guzman-Ramirez, L.; Hajduk, M.; Herwig, F. (October 2016). "The very fast evolution of Sakurai's object". Proceedings of the International Astronomical Union. 12 (S323): 380–381. arXiv:1701.06804. doi:10.1017/S1743921317000588. ISSN 1743-9213. S2CID 119207851.