A near-infrared, wide-field, proper-motion search for brown dwarfs

Joannah L. Hinz; Donald W. McCarthy; Doug A. Simons; Todd J. Henry; J. Davy Kirkpatrick; Patrick C. McGuire

doi:10.1086/339555

A near-infrared, wide-field, proper-motion search for brown dwarfs

Joannah L. Hinz, Donald W. McCarthy, Doug A. Simons, Todd J. Henry, J. Davy Kirkpatrick, Patrick C. McGuire

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24 Scopus citations

Abstract

A common proper-motion survey of M dwarf stars within 8 pc of the Sun reveals no new stellar or brown dwarf companions at wide separations (∼100-1400 AU). This survey tests whether the brown dwarf "desert" extends to large separations around M dwarf stars and further explores the census of the solar neighborhood. The sample includes 66 stars north of -30° and within 8 pc of the Sun. Existing first-epoch images are compared with new J-band images of the same fields an average of 7 yr later to reveal proper-motion companions within a ∼4′ radius of the primary star. No new companions are detected to a J-band limiting magnitude of ∼16.5, corresponding to a companion mass of ∼40 Jupiter masses for an assumed age of 5 Gyr at the mean distance of the objects in the survey, 5.8 pc.

Original language	English (US)
Pages (from-to)	2027-2032
Number of pages	6
Journal	Astronomical Journal
Volume	123
Issue number	4 1756
DOIs	https://doi.org/10.1086/339555
State	Published - Apr 2002

Keywords

Stars: imaging
Stars: low-mass, brown dwarfs
Stars: statistics

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/339555

Cite this

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title = "A near-infrared, wide-field, proper-motion search for brown dwarfs",

abstract = "A common proper-motion survey of M dwarf stars within 8 pc of the Sun reveals no new stellar or brown dwarf companions at wide separations (∼100-1400 AU). This survey tests whether the brown dwarf {"}desert{"} extends to large separations around M dwarf stars and further explores the census of the solar neighborhood. The sample includes 66 stars north of -30° and within 8 pc of the Sun. Existing first-epoch images are compared with new J-band images of the same fields an average of 7 yr later to reveal proper-motion companions within a ∼4′ radius of the primary star. No new companions are detected to a J-band limiting magnitude of ∼16.5, corresponding to a companion mass of ∼40 Jupiter masses for an assumed age of 5 Gyr at the mean distance of the objects in the survey, 5.8 pc.",

keywords = "Stars: imaging, Stars: low-mass, brown dwarfs, Stars: statistics",

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T1 - A near-infrared, wide-field, proper-motion search for brown dwarfs

AU - Hinz, Joannah L.

AU - McCarthy, Donald W.

AU - Simons, Doug A.

AU - Henry, Todd J.

AU - Kirkpatrick, J. Davy

AU - McGuire, Patrick C.

PY - 2002/4

Y1 - 2002/4

N2 - A common proper-motion survey of M dwarf stars within 8 pc of the Sun reveals no new stellar or brown dwarf companions at wide separations (∼100-1400 AU). This survey tests whether the brown dwarf "desert" extends to large separations around M dwarf stars and further explores the census of the solar neighborhood. The sample includes 66 stars north of -30° and within 8 pc of the Sun. Existing first-epoch images are compared with new J-band images of the same fields an average of 7 yr later to reveal proper-motion companions within a ∼4′ radius of the primary star. No new companions are detected to a J-band limiting magnitude of ∼16.5, corresponding to a companion mass of ∼40 Jupiter masses for an assumed age of 5 Gyr at the mean distance of the objects in the survey, 5.8 pc.

AB - A common proper-motion survey of M dwarf stars within 8 pc of the Sun reveals no new stellar or brown dwarf companions at wide separations (∼100-1400 AU). This survey tests whether the brown dwarf "desert" extends to large separations around M dwarf stars and further explores the census of the solar neighborhood. The sample includes 66 stars north of -30° and within 8 pc of the Sun. Existing first-epoch images are compared with new J-band images of the same fields an average of 7 yr later to reveal proper-motion companions within a ∼4′ radius of the primary star. No new companions are detected to a J-band limiting magnitude of ∼16.5, corresponding to a companion mass of ∼40 Jupiter masses for an assumed age of 5 Gyr at the mean distance of the objects in the survey, 5.8 pc.

KW - Stars: imaging

KW - Stars: low-mass, brown dwarfs

KW - Stars: statistics

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JO - Astronomical Journal

JF - Astronomical Journal

IS - 4 1756

ER -

A near-infrared, wide-field, proper-motion search for brown dwarfs

Abstract

Keywords

ASJC Scopus subject areas

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