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A Search for Companions to Nearby Brown Dwarfs: The Binary DENIS-P J1228.2-1547

Martín, E. L. and Brandner, W. and Basri, G. (1999) A Search for Companions to Nearby Brown Dwarfs: The Binary DENIS-P J1228.2-1547. Science, 283 (5408). pp. 1718-1720. ISSN 0036-8075. doi:10.1126/science.283.5408.1718.

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Hubble Space Telescope imaging observations of two nearby brown dwarfs, DENIS-P J1228.2-1547 and Kelu 1, made with the near-infrared camera and multiobject spectrometer (NICMOS), show that the DENIS object is resolved into two components of nearly equal brightness with a projected separation of 0.275 arc second (5 astronomical units for a distance of 18 parsecs). This binary system will be able to provide the first dynamical measurement of the masses of two brown dwarfs in only a few years. Upper limits to the mass of any unseen companion in Kelu 1 yield a planet of 7 Jupiter masses aged 0.5 × 10^9years, which would have been detected at a separation larger than about 4 astronomical units. This example demonstrates that giant planets could be detected by direct imaging if they exist in Jupiter-like orbits around nearby young brown dwarfs.

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Additional Information:© 1999 American Association for the Advancement of Science. Received 17 December 1998; accepted 2 February 1999. This paper is based on observations made with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy under NASA contract NAS5-26555. We thank the director of the Space Telescope Science Institute for granting us HST Director Discretionary time. G.B. acknowledges the support of NSF through grant AST96-18439. E.L.M. was supported by a postdoctoral fellowship of the Spanish Ministerio de Educación y Cultura.
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Ministerio de Educación y CulturaUNSPECIFIED
Issue or Number:5408
Record Number:CaltechAUTHORS:20141124-080246281
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52080
Deposited By: Tony Diaz
Deposited On:24 Nov 2014 21:38
Last Modified:10 Nov 2021 19:20

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