A candidate substellar companion to HR 7329

Patrick J. Lowrance, Glenn Schneider, J. Davy Kirkpatrick, E. E. Becklin, Alycia J. Weinberger, B. Zuckerman, Phil Plait, Eliot M. Malmuth, Sara R. Heap, A. Schultz, Bradford A. Smith, Richard J. Terrile, Dean C. Hines

Research output: Contribution to journalArticlepeer-review

101 Scopus citations


We present the discovery of a candidate substellar companion from a survey of nearby young stars made with the Near-Infrared Camera and Multiobject Spectrometer coronagraph on the Bubble Space Telescope. The H ≈ 12 mag object was discovered approximately 4″ from the young AO V star HR 7329. Using follow-up spectroscopy from the Space Telescope Imaging Spectrograph, we derive a spectral type between M7 V and M8 V with an effective temperature of ∼2600 K. We estimate that the probability of a chance alignment with a foreground dwarf star of this nature is ∼10-8, and therefore we suggest that the object (HR 7329B) is physically associated with HR 7329, with a projected separation of 200 AU. Current brown dwarf cooling models indicate a mass of less than 50 MJup for HR 7329B based on age estimates of ≤ 30 Myr for HR 7329A.

Original languageEnglish (US)
Pages (from-to)390-395
Number of pages6
JournalAstrophysical Journal
Issue number1 PART 1
StatePublished - Sep 20 2000


  • Stars: low-mass, brown dwarfs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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