DENIS_J082303.1−491201

DENIS J082303.1−491201

DENIS J082303.1−491201

Brown dwarf in the constellation Vela

DENIS-P J082303.1-491201 (also known as DENIS J082303.1-491201, DE0823-49), is a binary system of two brown dwarfs, located 20.77 parsecs (67.7 ly) from Earth. The system is located in the constellation Vela.

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The primary has a spectral class of L1.5, a mass of 0.028 to 0.063 M☉ and a temperature of 2,150 K (1,880 °C; 3,410 °F). The secondary is also a brown dwarf but with a spectral type of L5.5, a mass of 0.018 to 0.045 M☉, and a temperature of 1,670 K (1,400 °C; 2,550 °F). The mass ratio is around 0.64 to 0.74.[2]

The system has an orbital period of 248 days. The age of the system is estimated to be around 80 to 500 million years old, a relatively young object in the solar neighbourhood, however it does not seem to have any association with any moving groups.[2]

DENIS J082303.1-491201 was discovered in 2007 by Ngoc Phan-Bao et al as part of the Deep Near Infrared Survey of the Southern Sky or DENIS for short.[5]

Planetary system

A substellar companion, DENIS-P J082303.1−491201 b was discovered in 2013[6] and included in the NASA Exoplanet Archive as the first exoplanet discovered by the Astrometry exoplanet detection method.[7][8]

References

  1. [1]
    Cutri, R. M.; et al. (2003). "2MASS All-Sky Catalog of Point Sources". VizieR On-line Data Catalog. Bibcode:2003yCat.2246....0C.
  2. [2]
    Sahlmann, J.; Burgasser, Adam J.; Martín, Eduardo L.; Lazorenko, P. F.; Bardalez Gagliuffi, D. C.; Mayor, M.; Ségransan, D.; Queloz, D.; Udry, S. (2015). "DE0823−49 is a juvenile binary brown dwarf at 20.7 pc". Astronomy & Astrophysics. 579: A61. arXiv:1505.07972. Bibcode:2015A&A...579A..61S. doi:10.1051/0004-6361/201425536. S2CID 119234915.
  3. [3]
    "2MASS J08230313-4912012". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 19 September 2017.
  4. [4]
    "Sixth Catalog of Orbits of Visual Binary Stars". United States Naval Observatory. Archived from the original on 1 August 2017. Retrieved 19 September 2017.
  5. [5]
    Phan-Bao, Ngoc; et al. (January 2008). "Discovery of new nearby L and late-M dwarfs at low Galactic latitude from the DENIS data base" (gif). Monthly Notices of the Royal Astronomical Society. 383 (3): 831–844. arXiv:0708.4169. Bibcode:2008MNRAS.383..831P. doi:10.1111/j.1365-2966.2007.12564.x. S2CID 10555715. Retrieved 1 June 2015..
  6. [6]
    Sahlmann, J.; Lazorenko, P. F.; Ségransan, D.; Martín, Eduardo L.; Queloz, D.; Mayor, M.; Udry, S. (2013), "Astrometric orbit of a low-mass companion to an ultracool dwarf", Astronomy & Astrophysics, 556: A133, arXiv:1306.3225, Bibcode:2013A&A...556A.133S, doi:10.1051/0004-6361/201321871, S2CID 119193690
  7. [7]
    "Exoplanet and candidate statistics". NASA Exoplanet Archive. Retrieved 1 June 2015.
  8. [8]
    "Liste des exoplanètes découvertes par astrométrie". NASA Exoplanet Archive. Retrieved 1 June 2015.
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