Astronomy:WISE J0521+1025

From HandWiki
Short description: Brown dwarf in the constellation Orion

Coordinates: Sky map 05h 21m 26.349s, +10° 25′ 27.41″

WISE J0521+1025
WISE J0521+1025 is located in the constellation Orion
WISE J0521+1025 is located in the constellation Orion
WISE J0521+1025
Location of WISE J0521+1025 in the constellation Orion

Observation data
Equinox J2000.0]] (ICRS)
Constellation Orion
Right ascension  05h 21m 26.349s[1]
Declination 10° 25′ 27.41″[1]
Characteristics
Spectral type T7.5[1]
Apparent magnitude (J (2MASS)) 15.262[1]
Apparent magnitude (H (2MASS)) 15.222 ± 0.103[1]
Apparent magnitude (Ks (2MASS)) 14.665[1]
Apparent magnitude (w1 (WISE)) 14.098 ± 0.031[1]
Apparent magnitude (w2 (WISE)) 12.286 ± 0.026[1]
Apparent magnitude (w3 (WISE)) 10.306 ± 0.085[1]
Astrometry
Proper motion (μ) RA: +223.7±2.5[2] mas/yr
Dec.: −438.3±2.5[2] mas/yr
Parallax (π)150.2 ± 3.0[2] mas
Distance21.7 ± 0.4 ly
(6.7 ± 0.1 pc)
Details
Temperature727±88[2] K
Other designations
WISE J052126.29+102528.4[1]
WISE J0521+1025[1]
Database references
SIMBADdata

WISE J0521+1025 is a nearby brown dwarf of spectral type T7.5, located in the constellation Orion at approximately 21.7 light-years (6.7 parsecs) from Earth.[2]

At the time of discovery, it was the nearest known T dwarf in the northern sky.[1]

History of observations

WISE J0521+1025 was discovered by Bihain et al. by selection of sources with colours typical for T dwarfs from WISE All-Sky source catalogue and checking them for high proper motion using older surveys: 2MASS, DENIS, SDSS, SSS, DSS and UKIDSS. Three objects among about ten candidates, including WISE J0521+1025, were selected for spectroscopic follow up with Large Binocular Telescope (LBT). October 9, 2012 Bihain et al. carried out follow up observations of WISE J0521+1025 with near-Infrared spectrograph LUCI 1 on LBT. June 25, 2013 Astronomy & Astrophysics received the discovery paper, which was accepted for publication 10 July 2013.[1]

Distance

Distance of WISE J0521+1025 was estimated by Bihain et al. using mean absolute magnitudes of single T7.5 dwarfs, derived by Dupuy & Liu (2012) from trigonometric parallaxes:[3] 5.0 ± 1.3 pc (16.3 ± 4.2 ly).[1]

See also

Two other T dwarfs, announced in Bihain et al (2013):

References

  1. 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 Bihain, Gabriel; Scholz, Ralf-Dieter; Storm, Jesper; Schnurr, Olivier (2013). "An overlooked brown dwarf neighbour (T7.5 at d~5pc) of the Sun and two additional T dwarfs at about 10pc". Astronomy & Astrophysics 557: A43. doi:10.1051/0004-6361/201322141. Bibcode2013A&A...557A..43B. 
  2. 2.0 2.1 2.2 2.3 Kirkpatrick, J. Davy; Gelino, Christopher R.; Faherty, Jacqueline K.; Meisner, Aaron M.; Caselden, Dan; Schneider, Adam C.; Marocco, Federico; Cayago, Alfred J. et al. (2021). "The Field Substellar Mass Function Based on the Full-sky 20 pc Census of 525 L, T, and y Dwarfs". The Astrophysical Journal Supplement Series 253 (1): 7. doi:10.3847/1538-4365/abd107. Bibcode2021ApJS..253....7K. 
  3. Dupuy, Trent J.; Liu, Michael C. (2012). "The Hawaii Infrared Parallax Program. I. Ultracool Binaries and the L/T Transition". The Astrophysical Journal Supplement 201 (2): 19. doi:10.1088/0067-0049/201/2/19. Bibcode2012ApJS..201...19D.