DENIS J1048−3956
Observation data
Epoch J2000      Equinox J2000
Constellation Antlia
Right ascension 10h 48m 14.640s[1]
Declination −39° 56′ 06.24″[1]
Apparent magnitude (V) 17.532[1]
Characteristics
Spectral type M8.5V[1]
Apparent magnitude (J) 9.5[1]
Astrometry
Radial velocity (Rv)−10.1 ± 0.5[1] km/s
Proper motion (μ) RA: −1198 ± 10[1] mas/yr
Dec.: −970 ± 8[1] mas/yr
Parallax (π)247.2156 ± 0.0512 mas[2]
Distance13.193 ± 0.003 ly
(4.0451 ± 0.0008 pc)
Absolute magnitude (MV)19.37[3]
Details
Mass0.075[4] M☉
Radius0.108[4] R☉
Surface gravity (log g)4.3±0.3[5] cgs
Temperature2330±60[6] K
Age<1[5] Gyr
Other designations
GJ 11547[7],2MASS J10481463−3956062, 2MASSI J1048147−395606, 2MUCD 20385, DENIS-P J104814.9−395604, DENIS-P J104814.7−395606, DEN 1048−3956, USNO-B1.0 0500-00227632
Database references
SIMBADdata
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)
DENIS J1048−3956 is located in the constellation Antlia.
DENIS J1048−3956 is located in the constellation Antlia.
DENIS 1048−3956
Location of DENIS J1048−3956 in the constellation Antlia

DENIS J1048−3956 is an exceptionally small, dim ultra-cool red dwarf star about 13.2 light years from Earth in the southern constellation of Antlia, among the stars closest to Earth. This star is very dim with an apparent magnitude of about 17,[3] and will require a telescope with a camera to be seen. It was discovered in 2000 by Xavier Delfosse (Institute of Astrophysics of the Canary Islands, now Observatoire de Grenoble) and Thierry Forveille (Canada–France–Hawaii Telescope Corporation), with the assistance of nine other astronomers.

Kinematically, DENIS J1048−3956 belongs to the young thin disc.[5] In 2005 a powerful flare from this object was detected by radio astronomy.[8]

J1048 is a good example of the smallest, least massive stars possible. With a mass just 7.5% that of the Sun, it is barely large enough to sustain fusion in its core. In fact, it is so small, dim, and cool that it was originally thought to be a brown dwarf.

See also

References

  1. 1 2 3 4 5 6 7 8 "2MASSI J1048147-395606 -- Brown Dwarf (M<0.08solMass)". Centre de Données astronomiques de Strasbourg. Retrieved 2009-12-15.
  2. ↑ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  3. 1 2 "The One Hundred Nearest Star Systems". RECONS. Georgia State University. January 1, 2009. Retrieved 2011-12-03.
  4. 1 2 Lienhard, F.; Queloz, D.; Gillon, M.; Burdanov, A.; Delrez, L.; Ducrot, E.; Handley, W.; Jehin, E.; Murray, C. A.; Triaud, A H M J.; Gillen, E.; Mortier, A.; Rackham, B. V. (2020), "Global analysis of the TRAPPIST Ultra-Cool Dwarf Transit Survey", Monthly Notices of the Royal Astronomical Society, 497 (3): 3790–3808, arXiv:2007.07278, Bibcode:2020MNRAS.497.3790L, doi:10.1093/mnras/staa2054
  5. 1 2 3 The ultracool dwarf DENIS-P J104814.7-395606 Chromospheres and coronae at the low-mass end of the main-sequence
  6. ↑ Gonzales, Eileen C.; Faherty, Jacqueline K.; Gagné, Jonathan; Teske, Johanna; McWilliam, Andrew; Cruz, Kelle (2019-12-01). "A Reanalysis of the Fundamental Parameters and Age of TRAPPIST-1". The Astrophysical Journal. 886 (2): 131. arXiv:1909.13859. Bibcode:2019ApJ...886..131G. doi:10.3847/1538-4357/ab48fc. ISSN 0004-637X.
  7. ↑ Golovin, Alex; Reffert, Sabine; Just, Andreas; Jordan, Stefan; Vani, Akash; Jahreiß, Hartmut (November 2022). "The Fifth Catalogue of Nearby Stars (CNS5)". Astronomy & Astrophysics. 670: A19. arXiv:2211.01449. Bibcode:2023A&A...670A..19G. doi:10.1051/0004-6361/202244250. S2CID 253264922. Catalogue can be accessed here.
  8. ↑ Adam J. Burgasser & Mary E. Putman (June 10, 2005). "Quiescent Radio Emission from Southern Late-Type M Dwarfs and a Spectacular Radio Flare from the M8 Dwarf DENIS 1048−3956". The Astrophysical Journal. 626 (1): 486–497. arXiv:astro-ph/0502365. Bibcode:2005ApJ...626..486B. doi:10.1086/429788. S2CID 13286883.


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