A T8.5 brown dwarf member of the ξ ursae majoris system

Edward L. Wright; M. F. Skrutskie; J. Davy Kirkpatrick; Christopher R. Gelino; Roger L. Griffith; Kenneth A. Marsh; Tom Jarrett; M. J. Nelson; H. J. Borish; Gregory MacE; Amanda K. Mainzer; Peter R. Eisenhardt; Ian S. McLean; John J. Tobin; Michael C. Cushing

doi:10.1088/0004-6256/145/3/84

A T8.5 brown dwarf member of the ξ ursae majoris system

Edward L. Wright
, M. F. Skrutskie
, J. Davy Kirkpatrick
, Christopher R. Gelino
, Roger L. Griffith
, Kenneth A. Marsh
, Tom Jarrett
, M. J. Nelson
, H. J. Borish
, Gregory MacE
, Amanda K. Mainzer
, Peter R. Eisenhardt
, Ian S. McLean
, John J. Tobin
, Michael C. Cushing

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

The Wide-field Infrared Survey Explorer has revealed a T8.5 brown dwarf (WISE J111838.70+312537.9) that exhibits common proper motion with a solar-neighborhood (8 pc) quadruple star system - ξ Ursae Majoris. The angular separation is 8.′5, and the projected physical separation is ≈4000 AU. The sub-solar metallicity and low chromospheric activity of ξ UMa A argue that the system has an age of at least 2 Gyr. The infrared luminosity and color of the brown dwarf suggests the mass of this companion ranges between 14 and 38 M_J for system ages of 2 and 8 Gyr, respectively.

Original language	English (US)
Article number	84
Journal	Astronomical Journal
Volume	145
Issue number	3
DOIs	https://doi.org/10.1088/0004-6256/145/3/84
State	Published - Mar 2013
Externally published	Yes

Keywords

brown dwarfs
infrared: stars
solar neighborhood
stars: late-type
stars: low-mass

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/0004-6256/145/3/84

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Wright, E. L., Skrutskie, M. F., Kirkpatrick, J. D., Gelino, C. R., Griffith, R. L., Marsh, K. A., Jarrett, T., Nelson, M. J., Borish, H. J., MacE, G., Mainzer, A. K., Eisenhardt, P. R., McLean, I. S., Tobin, J. J., & Cushing, M. C. (2013). A T8.5 brown dwarf member of the ξ ursae majoris system. Astronomical Journal, 145(3), Article 84. https://doi.org/10.1088/0004-6256/145/3/84

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title = "A T8.5 brown dwarf member of the ξ ursae majoris system",

abstract = "The Wide-field Infrared Survey Explorer has revealed a T8.5 brown dwarf (WISE J111838.70+312537.9) that exhibits common proper motion with a solar-neighborhood (8 pc) quadruple star system - ξ Ursae Majoris. The angular separation is 8.′5, and the projected physical separation is ≈4000 AU. The sub-solar metallicity and low chromospheric activity of ξ UMa A argue that the system has an age of at least 2 Gyr. The infrared luminosity and color of the brown dwarf suggests the mass of this companion ranges between 14 and 38 MJ for system ages of 2 and 8 Gyr, respectively.",

keywords = "brown dwarfs, infrared: stars, solar neighborhood, stars: late-type, stars: low-mass",

author = "Wright, \{Edward L.\} and Skrutskie, \{M. F.\} and Kirkpatrick, \{J. Davy\} and Gelino, \{Christopher R.\} and Griffith, \{Roger L.\} and Marsh, \{Kenneth A.\} and Tom Jarrett and Nelson, \{M. J.\} and Borish, \{H. J.\} and Gregory MacE and Mainzer, \{Amanda K.\} and Eisenhardt, \{Peter R.\} and McLean, \{Ian S.\} and Tobin, \{John J.\} and Cushing, \{Michael C.\}",

year = "2013",

month = mar,

doi = "10.1088/0004-6256/145/3/84",

language = "English (US)",

volume = "145",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

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T1 - A T8.5 brown dwarf member of the ξ ursae majoris system

AU - Wright, Edward L.

AU - Skrutskie, M. F.

AU - Kirkpatrick, J. Davy

AU - Gelino, Christopher R.

AU - Griffith, Roger L.

AU - Marsh, Kenneth A.

AU - Jarrett, Tom

AU - Nelson, M. J.

AU - Borish, H. J.

AU - MacE, Gregory

AU - Mainzer, Amanda K.

AU - Eisenhardt, Peter R.

AU - McLean, Ian S.

AU - Tobin, John J.

AU - Cushing, Michael C.

PY - 2013/3

Y1 - 2013/3

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AB - The Wide-field Infrared Survey Explorer has revealed a T8.5 brown dwarf (WISE J111838.70+312537.9) that exhibits common proper motion with a solar-neighborhood (8 pc) quadruple star system - ξ Ursae Majoris. The angular separation is 8.′5, and the projected physical separation is ≈4000 AU. The sub-solar metallicity and low chromospheric activity of ξ UMa A argue that the system has an age of at least 2 Gyr. The infrared luminosity and color of the brown dwarf suggests the mass of this companion ranges between 14 and 38 MJ for system ages of 2 and 8 Gyr, respectively.

KW - brown dwarfs

KW - infrared: stars

KW - solar neighborhood

KW - stars: late-type

KW - stars: low-mass

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UR - https://www.scopus.com/pages/publications/84874147985#tab=citedBy

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DO - 10.1088/0004-6256/145/3/84

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SN - 0004-6256

VL - 145

JO - Astronomical Journal

JF - Astronomical Journal

IS - 3

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ER -

A T8.5 brown dwarf member of the ξ ursae majoris system

Abstract

Keywords

ASJC Scopus subject areas

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