WISE 1800+0134

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Coordinates: Sky map 18h 00m 26.60s, +01° 34′ 53.1″

WISEP J180026.60+013453.1
Observation data
Epoch 2010.22[1]:{{{3}}}      Equinox J2000[1]:{{{3}}}
Constellation Ophiuchus
Right ascension 18h 00m 26.60s[1]:{{{3}}}
Declination 01° 34′ 53.1″[1]:{{{3}}}
Characteristics
Spectral type L7.5[1]:{{{3}}}
Apparent magnitude (J (2MASS filter system)) 14.30 ± 0.04[1]:{{{3}}}
Apparent magnitude (H (2MASS filter system)) 13.12 ± 0.04[1]:{{{3}}}
Apparent magnitude (KS (2MASS filter system)) 12.42 ± 0.03[1]:{{{3}}}
Astrometry
Proper motion (μ) RA: 220 ± 20[1]:{{{3}}} mas/yr
Dec.: −360 ± 20[1]:{{{3}}} mas/yr
Parallax (π) 124.89 ± 3.24[2]:{{{3}}} mas
Distance 26.1 ± 0.7 ly
(8.0 ± 0.2 pc)
Details[1]:{{{3}}}
Mass 0.04—0.074 M☉
Luminosity 10−4.5 ± 0.3 L☉
Temperature 1430 ± 100 K
Other designations
WISEP J180026.60+013453.1[1]:{{{3}}}
W1800+0134[1]:{{{3}}}
2MASS J18002648+0134565[1]:{{{3}}}
DENIS J180026.4+013457[1]:{{{3}}}
DENIS-P J180026.4+013457[3]:{{{3}}}
Database references
SIMBAD data
WISE 1800+0134 is located in 100x100
WISE 1800+0134

WISEP J180026.60+013453.1 (designation is abbreviated to W1800+0134[1]:{{{3}}}) is a brown dwarf of spectral class L7.5,[1]:{{{3}}} located in constellation Ophiuchus at approximately 29 light-years from Earth.[1]:{{{3}}}

Discovery

WISEP J180026.60+013453.1 was discovered in 2011 by Gizis et al. from data, collected by Wide-field Infrared Survey Explorer (WISE) Earth-orbiting satellite — NASA infrared-wavelength 40 cm (16 in) space telescope, which mission lasted from December 2009 to February 2011. There are also precovery identifications of this object in Two Micron All-Sky Survey (2MASS) data (observed on 2000 September 23) and in the 3rd release of the DENIS database (close in time to the 2MASS observation).[1]:{{{3}}} On 2011 June 22 Gizis et al. had conducted near-infrared spectroscopy with SpeX spectrograph, mounted on the 3 m Infrared Telescope Facility (IRTF), located at the Mauna Kea Observatory in Hawaii.[1]:{{{3}}} In 2011 Gizis et al. published a paper in The Astronomical Journal, where they presented discovery of a newfound by WISE L-type brown dwarf WISEP J180026.60+013453.1 (a single discovery, presented in the article).[1]:{{{3}}}

Physical properties

WISEP J180026.60+013453.1 has temperature 1430 ± 100 K and luminosity 10−4.5 ± 0.3 Solar luminosities (the estimates are based on the object's spectral class (L7.5)).[1]:{{{3}}} Mass estimates, determined from this temperature, are 0.04,[note 1] 0.05,[note 2] and 0.074[note 3] Solar masses, anyway below the hydrogen-burning limit, which implies that WISEP J180026.60+013453.1 is not a true star, but only a substellar object, that is a brown dwarf.[1]:{{{3}}}

Failed test for binarity

WISEP J180026.60+013453.1 was tested spectroscopically for L + T binarity, and the binarity was not revealed.[1]:{{{3}}} Common proper motion companions also were not found.[1]:{{{3}}}

See also

L-type brown dwarfs, presented in Kirkpatrick et al. (2011):[4]:{{{3}}}

L-type brown dwarf, presented in Castro & Gizis (2012):[5]:{{{3}}}

L-type brown dwarf, presented in Gizis et al. (2012):[6]:{{{3}}}

M-type brown dwarf, presented in Kirkpatrick et al. (2011):[4]:{{{3}}}

Notes

  1. ↑ For an assumed age 0.5 Gyr.
  2. ↑ For an assumed age 1 Gyr.
  3. ↑ For an assumed age 5 Gyr.

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 1.15 1.16 1.17 1.18 1.19 1.20 1.21 1.22 1.23 1.24 Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ 4.0 4.1 Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ Lua error in package.lua at line 80: module 'strict' not found.
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