Patrick J. Lowrance et al. 2000 ApJ 541 390 doi:10.1086/309437
Patrick J. Lowrance1, Glenn Schneider2, J. Davy Kirkpatrick3, E. E. Becklin1, Alycia J. Weinberger1, B. Zuckerman1, Phil Plait4, Eliot M. Malmuth5, Sara R. Heap6, A. Schultz7, Bradford A. Smith8, Richard J. Terrile9 and Dean C. Hines2
Show affiliationsWe 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 Hubble Space Telescope. The H ≈ 12 mag object was discovered approximately 4'' from the young A0 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.
Issue 1 (2000 September 20)
Received 2000 January 24, accepted for publication 2000 May 8
Patrick J. Lowrance et al. 2000 ApJ 541 390
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