A Candidate Substellar Companion to HR 7329 | Zendy

Patrick Lowrance | Zendy; Glenn Schneider | Zendy; J. Davy Kirkpatrick | Zendy; E. E. Becklin | Zendy; Alycia J. Weinberger | Zendy; B. Zuckerman | Zendy; P. Plait | Zendy; Eliot M. Malmuth | Zendy; Sara R. Heap | Zendy; A. Schultz | Zendy; B. A. Smith | Zendy; R. J. Terrile | Zendy; Dean C. Hines | Zendy

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A Candidate Substellar Companion to HR 7329

Author(s) -

Patrick Lowrance,

Glenn Schneider,

J. Davy Kirkpatrick,

E. E. Becklin,

Alycia J. Weinberger,

B. Zuckerman,

P. Plait,

Eliot M. Malmuth,

Sara R. Heap,

A. Schultz,

B. A. Smith,

R. J. Terrile,

Dean C. Hines

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/309437

Subject(s) - brown dwarf , coronagraph , physics , spectrograph , stars , astrophysics , astronomy , hubble space telescope , planet , telescope , exoplanet , space telescope imaging spectrograph , low mass , stellar classification , proper motion , spectral line

We present the discovery of a candidate substellar companion from a survey ofnearby, young stars with the NICMOS coronagraph on the Hubble Space Telescope.The H ~ 12 mag object was discovered approximately 4" from the young A0V starHR 7329. Using follow-up spectroscopy from STIS, we derive a spectral typebetween M7V and M8V with an effective temperature of ~ 2600 K. We estimate thatthe probability of a chance alignment with a foreground dwarf star of thisnature is ~ 10^(-8) and therefore suggest the object (HR 7329B) is physicallyassociated with HR 7329 with a projected separation of 200 AU. Current browndwarf cooling models indicate a mass of less than 50 Jupiter masses for HR7329B based on age estimates of < 30 Myr for HR7329A.Comment: 8 pages LATEX, 5 ps figures, accepted for Ap

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