On the double-planet system around HD 83443

Carter, Brad D. and Butler, R. Paul and Marcy, Geoffrey W. and Vogt, Steven S. and Tinney, C. G. and Jones, Hugh R. A. and McCarthy, Chris and Penny, Alan J. and Apps, Kevin (2002) On the double-planet system around HD 83443. The Astrophysical Journal, 578 (11). pp. 565-572. ISSN 0004-637X

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Abstract

The Geneva group has reported two Saturn-mass planets orbiting HD 83443 (KO V) with periods of 2.98 and 29.8 days. The two planets have raised interest in their dynamics because of the possible 10:1 orbital resonance and the strong gravitational interactions. We report precise Doppler measurements of HD 83443 obtained with the Keck/HIRES and the Anglo-Australian Telescope (AAT) UCLES spectrometers. These measurements strongly confirm the inner planet with a period of 2.985 days, with orbital parameters in very good agreement with those of the Geneva group. However, these Doppler measurements show no evidence of the outer planet, at thresholds of one-fourth (3 m s -1) of the reported velocity amplitude of 13.8 m s -1. Thus, the existence of the outer planet is in question. Indeed, the current Doppler measurements reveal no evidence of any second planet with a period less than a year.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version made accessible, in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 30 Nov 2007 11:47
Last Modified: 24 Mar 2017 03:17
Uncontrolled Keywords: planetary systems; stars; HD 83443
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020108 Planetary Science (excl. Extraterrestrial Geology)
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020102 Astronomical and Space Instrumentation
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1086/342471
URI: http://eprints.usq.edu.au/id/eprint/14341

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