HD 271182
HD 271182, occasionally referred to as G266 and R92, is a rare yellow hypergiant and an Alpha Cygni variable.[1] It is one of the brightest stars in the Large Magellanic Cloud (LMC),[2] positioned in the deep southern constellation of Dorado. Gaia DR2 parallax measurements indicate that it is located around 200,000 light-years (61,000 parsecs) away, though this value is extremely uncertain. Despite this vast distance from Earth, the star is observable through a small telescope due to its immense luminosity, at an apparent magnitude of 9.620.
Stellar properties
It has a low metallicity of [Fe/H]=−0.50 dex,[3] meaning it only has 10−0.50≈32% the Sun's iron content, which is lower than the LMC average for young stars at around 50%.[4] It is also depleted in carbon and oxygen, but very enhanced in nitrogen ([N/Fe]=1.53 dex).[3]
Variability
References
- ↑ van Genderen, A. M.; Hadiyanto Nitihardjo, G. (September 1989). "Light variations of massive stars (alpha Cygni variables). X. The F type supergiants G 266 = HDE 271182 = R 92 and G 322 = HDE 269612 in the LMC". Astronomy & Astrophysics Supplement Series. 79: 401-406. Bibcode:1989A&AS...79..401V.
- ↑ Feast, M. W.; Thackeray, A. D.; Wesselink, A. J. (1960-10-01). "The Brightest Stars in the Magellanic Clouds". Monthly Notices of the Royal Astronomical Society. 121 (4): 337–385. doi:10.1093/mnras/121.4.337. ISSN 0035-8711.
- ↑ 3.0 3.1 Hill, V.; Barbuy, B.; Spite, M. (July 1997). "Carbon, nitrogen, oxygen and lithium abundances of six cool supergiants in the SMC". Astronomy & Astrophysics. 323: 461–468. Bibcode:1997A&A...323..461H.
- ↑ Wood, P. R.; Habing, H. J.; McGregor, P. J. (August 1998). "Infrared monitoring of OH/IR stars near the Galactic Center". Astronomy & Astrophysics. 336: 925–941. Bibcode:1998A&A...336..925W.
- Georgy, Cyril; Saio, Hideyuki; Meynet, Georges (2021). "Blue supergiants as tests for stellar physics". Astronomy & Astrophysics. 650: A128. doi:10.1051/0004-6361/202040105. ISSN 0004-6361.
- Glatzel, Wolfgang; Kraus, Michaela (2024-03-23). "Instabilities in the yellow hypergiant domain". Monthly Notices of the Royal Astronomical Society. 529 (4): 4947–4957. doi:10.1093/mnras/stae861. ISSN 0035-8711.
- Humphreys, Roberta M.; Jones, Terry J.; Martin, John C. (2023-08-01). "Yellow Supergiants and Post-red Supergiant Evolution in the Large Magellanic Cloud". The Astronomical Journal. 166 (2): 50. doi:10.3847/1538-3881/acdd6c. ISSN 0004-6256.
- Hagen, W.; Humphreys, R. M.; Stencel, R. E. (1981). "High-dispersion spectroscopy of the most luminous F- and G-type supergiants in the Large Magellanic Cloud and the Milky Way". Publications of the Astronomical Society of the Pacific. 93: 567. doi:10.1086/130889. ISSN 0004-6280.
- Kourniotis, M; Kraus, M; Maryeva, O; Borges Fernandes, M; Maravelias, G (2022-02-24). "Revisiting the evolved hypergiants in the Magellanic Clouds". Monthly Notices of the Royal Astronomical Society. 511 (3): 4360–4376. doi:10.1093/mnras/stac386. ISSN 0035-8711.
- van Leeuwen, F.; van Genderen, A. M.; Zegelaar, I. (1998). "Hipparcos photometry of 24 variable massive stars ( α Cygni variables)". Astronomy and Astrophysics Supplement Series. 128 (1): 117–129. doi:10.1051/aas:1998129. ISSN 0365-0138.
- Eggen, O. J. (1983). "Pseudocepheids. II - Two variables in the Large Magellanic Cloud". The Astronomical Journal. 88: 1458. doi:10.1086/113434.
- Grieve, G. R.; Madore, B. F.; Welch, D. L. (1985). "Leavitt variables - Bright variable supergiants and their implications for the distance scale". The Astrophysical Journal. 294: 513. doi:10.1086/163318. ISSN 0004-637X.
- Hagen, W.; Humphreys, R. M.; Stencel, R. E. (December 1981). "Las envolturas circunestelares de las supergiantes del tipo F Y G EN la NUBE Mayor de Magallanes" [The circumstellar envelopes of the F and G-type supergiants in the Large Magellanic Cloud.]. Revista Mexicana de Astronomia y Astrofisica (in español). 6: 59-63. Bibcode:1981RMxAA...6...59H.
This article "HD 271182" is from Wikipedia. The list of its authors can be seen in its historical and/or the page Edithistory:HD 271182. Articles copied from Draft Namespace on Wikipedia could be seen on the Draft Namespace of Wikipedia and not main one.
