The distribution of companions to ultracool dwarfs

P. R. Allen, I. N. Reid, David W Koerner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Results of an extensive survey for wide companions around late-M and L dwarfs, using NASA's IRTF are presented. No companions have been detected thus far. We develop a Bayesian statistical approach to the study of the ultracool dwarf companion distribution. This Bayesian method is applied to the analysis of several extant surveys of ultracool dwarfs for companions. Our Bayesian results indicate that the companion distribution to ultracool dwarfs is fundamentally different from that of higher mass stars. In particular, we demonstrate, to ∼4σ, that the mass function of brown dwarf companions is different than the mass function of their primaries.

Original languageEnglish (US)
Title of host publicationEuropean Space Agency, (Special Publication) ESA SP
EditorsF. Favata, G.A.J. Hussain, B. Battrick
Pages385-388
Number of pages4
Edition560 I
StatePublished - 2005
Event13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun - Hamburg, Germany
Duration: Jul 5 2004Jul 9 2004

Other

Other13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun
CountryGermany
CityHamburg
Period7/5/047/9/04

Fingerprint

Stars
NASA

Keywords

  • Brown dwarfs
  • Stars: very low-mass

ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

Allen, P. R., Reid, I. N., & Koerner, D. W. (2005). The distribution of companions to ultracool dwarfs. In F. Favata, G. A. J. Hussain, & B. Battrick (Eds.), European Space Agency, (Special Publication) ESA SP (560 I ed., pp. 385-388)

The distribution of companions to ultracool dwarfs. / Allen, P. R.; Reid, I. N.; Koerner, David W.

European Space Agency, (Special Publication) ESA SP. ed. / F. Favata; G.A.J. Hussain; B. Battrick. 560 I. ed. 2005. p. 385-388.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Allen, PR, Reid, IN & Koerner, DW 2005, The distribution of companions to ultracool dwarfs. in F Favata, GAJ Hussain & B Battrick (eds), European Space Agency, (Special Publication) ESA SP. 560 I edn, pp. 385-388, 13th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, Hamburg, Germany, 7/5/04.
Allen PR, Reid IN, Koerner DW. The distribution of companions to ultracool dwarfs. In Favata F, Hussain GAJ, Battrick B, editors, European Space Agency, (Special Publication) ESA SP. 560 I ed. 2005. p. 385-388
Allen, P. R. ; Reid, I. N. ; Koerner, David W. / The distribution of companions to ultracool dwarfs. European Space Agency, (Special Publication) ESA SP. editor / F. Favata ; G.A.J. Hussain ; B. Battrick. 560 I. ed. 2005. pp. 385-388
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