Song, I;
Schneider, G;
Zuckerman, B;
Farihi, J;
Becklin, EE;
Bessell, MS;
Lowrance, P;
(2006)
HST NICMOS imaging of the planetary-mass companion to the young brown dwarf 2MASSW J1207334-393254.
Astrophysical Journal
, 652
(1)
pp. 724-729.
10.1086/507831.
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Abstract
Multiband (0.9-1.6 μm) images of the TW Hydrae association (TWA) brown dwarf 2MASSW J1207334-393254 (also known as 2M 1207) and its candidate planetary-mass companion (2M 1207b) were obtained on 2004 August 28 and 2005 April 26 with HST NICMOS. The images from these two epochs unequivocally confirm the two objects as a common proper motion pair (16.0 σ confidence). A new measurement of the proper motion of 2M 1207 implies a distance to the system of 59 ± 7 pc and a projected separation of 46 ± 5 AU. The NICMOS and previously published VLT photometry of 2M 1207b, extending overall from 0.9 to 3.8 μm, are fully consistent with an object of a few Jupiter masses at the canonical age of a TWA member (∼8 Myr) based on evolutionary models of young giant planets. These observations provide information on the physical nature of 2M 1207b and unambiguously establish that the first direct image of a planetary-mass companion in orbit around a self-luminous body, other than our Sun, has been secured.
| Type: | Article |
|---|---|
| Title: | HST NICMOS imaging of the planetary-mass companion to the young brown dwarf 2MASSW J1207334-393254 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1086/507831 |
| Publisher version: | http://dx.doi.org/10.1086/507831 |
| Language: | English |
| Additional information: | Copyright © 2006. The American Astronomical Society. All rights reserved. |
| Keywords: | planetary systems; stars: individual (2MASSW J1207334–393254); stars: low-mass, brown dwarfs |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1477408 |
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