Sakurai's Object

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Sakurai's Object
Sakurai's Object cropped.jpg
Sakurai's Object (photo by ESO)
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
Distance1800-5000[5] pc
Details
Mass0.6[6] M
Luminosity~10,000 L
Other designations
V4334 Sgr, V4334 Sagittarii, 2MASS J17523269-1741080, DPV 1, Sakurai's variable, PN G010.4+04.4, GSC2 S2202011182877, Sakurai's Object, AAVSO 1746-17
Database references
SIMBADdata

Sakuri's Object , also known as V4334 Sagittarii, is a star in the Sagittarius constellation.[7][8][9][10][11][12][13]

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 | change source]

  1. 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. et al. (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. 
  2. 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. 
  3. 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: 623. 
  4. 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. doi:10.1111/j.1365-2966.2004.07808.x. 
  5. van Hoof, P. A. M.; Hajduk, M. (2007). "The onset of photoionization in Sakurai’s Object (V4334 Sagittarii)". Astronomy & Astrophysics 471: L9–L12. doi:10.1051/0004-6361:20077932. 
  6. 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. doi:10.1088/0004-637X/727/2/89. 
  7. 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.
  8. "'Inside out' nebula points to 'born again' star". Physics World. 2018-08-11. Retrieved 2019-01-16.
  9. "Sakurai's Object". iopscience.iop.org. doi:10.1086/310241/fulltext/5313.text.html. Retrieved 2019-01-16.
  10. "Sakurai's Object Evolution Witnessed in Real Time". IFLScience. Retrieved 2019-01-16.
  11. "Sakurai's Object | StarDate Online". stardate.org. Retrieved 2019-01-16.
  12. Hajduk, Marcin; Zijlstra, Albert A.; Herwig, Falk; van Hoof, Peter A. M.; Kerber, Florian; Kimeswenger, Stefan; Pollacco, Don L.; Evans, Aneurin et al. (2005-04-08). "The real-time stellar evolution of Sakurai's object". Science (New York, N.Y.) 308 (5719): 231–233. doi:10.1126/science.1108953. ISSN 1095-9203. PMID 15821085. https://www.ncbi.nlm.nih.gov/pubmed/15821085. 
  13. Hinkle, Kenneth H.; Joyce, Richard R.; Matheson, Thomas (2017-01-01). Sakurai's Object Continues to Brighten and Expand. 229. pp. 154.11. http://adsabs.harvard.edu/abs/2017AAS...22915411H. 
  14. Van de Steene, G. C.; van Hoof, P. A. M.; Kimeswenger, S.; Zijlstra, A. A.; Avison, A.; Guzman-Ramirez, L.; Hajduk, M.; Herwig, F. (2016-10). "The very fast evolution of Sakurai's object". Proceedings of the International Astronomical Union 12 (S323): 380–381. doi:10.1017/S1743921317000588. ISSN 1743-9213. https://arxiv.org/abs/1701.06804.