WISE 1841+7000

Coordinates: 18h 41m 24.75s, +70° 00′ 38.54″

WISEPA J184124.74+700038.0
Observation data
Epoch MJD 55590.80[1]      Equinox J2000[1]
Constellation Draco
Right ascension 18h 41m 24.75s[1]
Declination 70° 00′ 38.54″[1]
Characteristics
Whole system
Apparent magnitude (J (2MASS filter system)) 16.800 ± 0.035[1]
Apparent magnitude (J (MKO filter system)) 16.64 ± 0.03[1]
Apparent magnitude (H (2MASS filter system)) 16.912 ± 0.082[1]
Apparent magnitude (H (MKO filter system)) 16.99 ± 0.04[1]
Apparent magnitude (KS (2MASS filter system)) >15.626[1]
Component A
Spectral type T5[2]
Apparent magnitude (J (MKO filter system)) 17.24 ± 0.10[2]
Apparent magnitude (H (MKO filter system)) 17.73 ± 0.10[2]
Component B
Spectral type T5[2]
Apparent magnitude (J (MKO filter system)) 17.57 ± 0.13[2]
Apparent magnitude (H (MKO filter system)) 17.75 ± 0.10[2]
Astrometry
Proper motion (μ) RA: -104 ± 25[1] mas/yr
Dec.: 527 ± 28[1] mas/yr
Distance 131.1 ± 16[2] ly
(40.2 ± 4.9[2] pc)
Orbit[2]
Primary A
Companion B
Period (P) ~11[note 1] yr
Details
Component A
Mass ≈60[2][note 1] MJup
Component B
Mass ≈60[2][note 1] MJup
Position (relative to A)
Component B
Epoch of observation UT 2010 Jul 1
Angular distance 70 ± 14 mas [2]
Position angle 82 ± 9° [2]
Observed separation
(projected)		 2.8 ± 0.7 AU [2]
Other designations
WISEPA J184124.74+700038.0[1], WISE J1841+7000[1]

WISE 1841+7000 (full designation is WISEPA J184124.74+700038.0) is a binary system of two (A and B) brown dwarfs, both are of spectral class T5[2], located in constellation Draco. It is one of two binary brown dwarf systems (along with WISE 0458+6434)[2] among 104 brown dwarfs systems, discovered in 2011 by the Wide-field Infrared Survey Explorer[1]. Near-infrared imaging observations using Laser Guide Star Adaptive Optics system (LGS-AO) on Keck II had shown binarity of WISE 1841+7000[2]. Its photometric distance estimate (not assuming binarity of the system) is 22,4 pc (73,1 ly)[1]. System's real distance is, rather of all, larger, and assuming system's binarity distance estimate is 40.2 ± 4.9 pc, or 131.1 ± 16 ly[2].

See also

WISE 0458+6434

Notes

  1. ^ a b c For an assumed system age of 1 Gyr.

References

  1. ^ a b c d e f g h i j k l m n o Kirkpatrick, J. Davy; Cushing; Gelino; Griffith; Skrutskie; Marsh; Wright; Mainzer; Eisenhardt; McLean; Thompson; Bauer; Benford; Bridge; Lake; Petty; Stanford; Tsai; Bailey; Beichman; Bochanski; Burgasser; Capak; Cruz; Hinz; Kartaltepe; Knox; Manohar; Masters; Morales-Calderуnn; Prato; Rodigas; Salvato; Schurr; Scoville; Simcoe; Stapelfeldt; Stern; Stock; Vacca (2011). "The First Hundred Brown Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE)". arXiv:1108.4677v1 [astro-ph.SR]. 
  2. ^ a b c d e f g h i j k l m n o p q r Gelino; Kirkpatrick; Cushing; Eisenhardt; Griffith; Mainzer; Marsh; Skrutskie; Wright (2011). "WISE Brown Dwarf Binaries: The Discovery of a T5+T5 and a T8.5+T9 System". arXiv:1106.3142v1 [astro-ph.SR].