astro.wikisort.org - Star

Search / Calendar

ESO 439-26 is the least luminous white dwarf star known.[2][5] Located 140 light years away from the Sun, it is roughly 10 billion years old and has a temperature of 4560 Kelvin. Thus, despite being classified as a "white dwarf", it would actually appear yellowish in color.[6]

ESO 439-26
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Hydra
Right ascension 11h 39m 03.1036679378s[1]
Declination −28° 52′ 16.627821186″[1]
Apparent magnitude (V) 20.52[2]
Characteristics
Spectral type DC9[2]
U−B color index 1.03[3]
B−V color index 0.64[3]
R−I color index 1.14[3]
Astrometry
Proper motion (μ) RA: -397.560[1] mas/yr
Dec.: +36.758[1] mas/yr
Parallax (π)24.5 ± 1.0 mas[1]
Distance133 ± 5 ly
(41 ± 2 pc)
Absolute magnitude (MV)17.47[2]
Details
Mass1.19±0.02[3] M☉
Radius0.61[4] R☉
Luminosity1.15 ×10−5 [3] L☉
Surface gravity (log g)1.1 ×106 G[3] cgs
Temperature4,490±80[3] K
Other designations
Ruiz 439-26, WD 1136-286[1]
Database references
SIMBAD439-26 data

References


  1. "Ruiz 439-26". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved October 22, 2020.
  2. María Teresa Ruiz, P. Bergeron, S. K. Leggett, and Claudio Anguita (1995). "The Extremely Low Luminosity White Dwarf ESO 439-26". The Astrophysical Journal. 455. Bibcode:1995ApJ...455L.159R. doi:10.1086/309845. S2CID 120193018.{{cite journal}}: CS1 maint: uses authors parameter (link)
  3. Bergeron, P.; Leggett, S. K.; Ruiz, María Teresa (April 2001). "Photometric and Spectroscopic Analysis of Cool White Dwarfs with Trigonometric Parallax Measurements". Astrophysical Journal Supplement Series. 133 (2): 413–449. arXiv:astro-ph/0011286. Bibcode:2001ApJS..133..413B. doi:10.1086/320356. S2CID 15511301.
  4. Freese, Katherine; Krasteva, Eleonora (1999-03-15). "A bound on the flux of magnetic monopoles from catalysis of nucleon decay in white dwarfs". Physical Review D. 59 (6): 063007. arXiv:astro-ph/9804148. Bibcode:1999PhRvD..59f3007F. doi:10.1103/PhysRevD.59.063007. S2CID 14054944.
  5. "The Faintest Known White Dwarf". www.noao.edu. 1 March 1996.
  6. Kaler, James B. (May 7, 2006). The Hundred Greatest Stars. Springer Science & Business Media. ISBN 9780387216256 – via Google Books.

This article about a white dwarf is a stub. You can help Wikipedia by expanding it.

  • v
  • t
  • e


Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.

Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.

2019-2025
WikiSort.org - проект по пересортировке и дополнению контента Википедии