A T8.5 BROWN DWARF MEMBER OF THE ξ URSAE MAJORIS SYSTEM

By E. L. Wright, M. Skrutskie, J. D. Kirkpatrick, C. Gelino, R. Griffith, Kenneth A. Marsh, Thomas H. Jarrett, M. Nelson, H. J. Borish, G. Mace and 5 more. 2012

215 citations recorded by the source corpus.

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.

Subfields: Astronomy and Astrophysics, Education, Instrumentation

View Paper: https://www.semanticscholar.org/paper/98ca8d802ceb5f9feeb581ef17414f56fa805ab1

Citations in the corpus

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