Astronomy:G0.238-0.071

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G0.238-0.071, also known as [DWC2011] 56 or [MCD2010] 18,[1] is a Wolf-Rayet Star [2] in the constellation of Sagittarius. It is located near the Galactic Center,[3] around 25,000 light years from Earth.[4]

G0.238-0.071 is currently the most luminous star known in the Milky Way, having around 5 million times the luminosity of the Sun.[5] This also makes it among the most luminous stars ever discovered. It has a spectral type of WN11h[2] with an effective temperature between 39,500 and 44,000 K[5] which would give a radius between 39 and 48 times that of the Sun.[lower-alpha 1] Its mass is unknown but WNh stars with similar properties to G0.238-0.071 are massive, usually well over 100 times the mass of the Sun.[6]

Notes

  1. ↑ Applying the Stefan-Boltzmann Law with a nominal solar effective temperature of 5,772 K:
    (5,772/39,500)4*5,012,000=48 R⊙
    (5,772/44,000)4*5,012,000=39 R⊙

References

  1. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named SIMBAD
  2. ↑ 2.0 2.1 Cite error: Invalid <ref> tag; no text was provided for refs named CMZ
  3. ↑ Dong, H.; Wang, Q. D.; Cotera, A.; Stolovy, S.; Morris, M. R.; Mauerhan, J.; Mills, E. A.; Schneider, G. et al. (2011). "Hubble Space Telescope Paschen α survey of the Galactic Centre: Data reduction and products". Monthly Notices of the Royal Astronomical Society 417 (1): 114. doi:10.1111/j.1365-2966.2011.19013.x. Bibcode: 2011MNRAS.417..114D. 
  4. ↑ R. Abuter; A. Amorim; M. Bauböck; J. P. Berger; H. Bonnet; W. Brandner et al. (April 2019). "A geometric distance measurement to the Galactic center black hole with 0.3% uncertainty". Astronomy & Astrophysics 625: L10. doi:10.1051/0004-6361/201935656. Bibcode: 2019A&A...625L..10G. https://www.aanda.org/articles/aa/full_html/2019/05/aa35656-19/aa35656-19.html. 
  5. ↑ 5.0 5.1 Cite error: Invalid <ref> tag; no text was provided for refs named IsolatedWRGC
  6. ↑ Dong, H.; Wang, Q. D.; Morris, M. R. (2012). "A multiwavelength study of evolved massive stars in the Galactic Centre". Monthly Notices of the Royal Astronomical Society 425 (2): 884. doi:10.1111/j.1365-2966.2012.21200.x. Bibcode: 2012MNRAS.425..884D. 



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