SDSS J042348.57-041403.5

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Brown dwarf
SDSS J042348.57−041403.5
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Eridanus
Right ascension 04 h 23 m 48.6 s
declination -04 ° 14 ′ 4 ″
Apparent brightness approx 14.5 mag
parallax 65.9 ± 1.7 mas
distance 15.2 ± 0.4  pc 
Proper movement
Rec. Share: approx. −331 mas / a
Dec. portion: approx. +76 mas / a
Typing
Spectral class L6 ± 1 + T2 ± 1
Physical Properties
Other names
and catalog entries
Further designations:

SDSSp J042348.57−041403.5 • 2MASS J04234858−0414035 • 2MASSI J0423485−041403 • 2MUCD 10276 • WDS J04238-0414

SDSS J042348.57-041403.5 (also short SDSS 0423-0414 ) is a double system consisting of two brown dwarfs in the constellation Eridanus .

The property was created in 2002 by Geballe et al. classified as a T0 dwarf by analyzing data from the Sloan Digital Sky Survey (SDSS) of its spectrum in the near infrared (due to the strong H 2 O bands and weak methane absorption at 1.6 and 2.2 μm). Spectra obtained later in visible light gave the object an assignment to spectral class L7.5 (e.g. Cruz et al. 2003). Finally, Burgasser et al. through observations with the Hubble space telescope from July 2004, to resolve the object as a double system with a narrow angular distance of 0 ″, 16 (corresponding to around 2.5  AU ). The components were roughly assigned to the spectral classes L6 and T2, and the period of the system was estimated to be around 15 to 20 years.

literature

  • Adam J. Burgasser et al .: SDSS J042348.57-041403.5AB: a brown dwarf binary straddling the L / T transition. In: The Astrophysical Journal Vol. 634 No. 2 (2005), pp. L177-L180, bibcode : 2005ApJ ... 634L.177B
  • Kelle L. Cruz, I. Neill Reid, James Liebert et al .: Meeting the Cool Neighbors. V. A 2MASS-Selected Sample of Ultracool Dwarfs. In: The Astronomical Journal , Vol. 126, No. 5 (2003), pp. 2421-2448, doi : 10.1086 / 378607 , bibcode : 2003AJ .... 126.2421C
  • TR Geballe et al .: Toward Spectral Classification of L and T Dwarfs: Infrared and Optical Spectroscopy and Analysis . In: The Astrophysical Journal , Vol. 564, No. 1, pp. 466-481, doi : 10.1086 / 324078 , bibcode : 2002ApJ ... 564..466G

Individual evidence

  1. ↑ a b SIMBAD query
  2. ↑ a b Burgasser et al .: SDSS J042348.57-041403.5AB: a brown dwarf binary straddling the L / T transition. In: The Astrophysical Journal Vol. 634 No. 2 (2005), pp. L177-L180
  3. ↑ Schmidt et al .: "Activity and Kinematics of Ultracool Dwarfs, Including an Amazing Flare Observation"; AJ 133 (5); converted from: μ = (+0.34 ± 0.05) arcsec / a, θ = 283 ° ± 10 °; see. Burgasser et al. 2005: μ = (+333 ± 3) mas / a, θ = 284 °, 2 ± 0 °, 2