The Pan-Pacific planet search. III: Five companions orbiting giant stars

Wittenmyer, R. A. and Butler, R. P. and Wang, L. and Bergmann, C. and Salter, G. S. and Tinney, C. G. and Johnson, J. A. (2016) The Pan-Pacific planet search. III: Five companions orbiting giant stars. Monthly Notices of the Royal Astronomical Society, 455 (2). pp. 1398-1405. ISSN 0035-8711

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Abstract

We report a new giant planet orbiting the K giant HD 155233, as well as four stellar-mass companions from the Pan–Pacific Planet Search, a Southern hemisphere radial velocity survey for planets orbiting nearby giants and sub-giants. We also present updated velocities and a
refined orbit for HD 47205b (7 CMa b), the first planet discovered by this survey. HD 155233b has a period of 885 ± 63 d, eccentricity e = 0.03 ± 0.20, and m sin i = 2.0 ± 0.5 MJup. The stellar-mass companions range in m sin i from 0.066 to 0.33 M�. Whilst HD 104358B falls slightly below the traditional 0.08 M� hydrogen-burning mass limit, and is hence a brown dwarf candidate, we estimate only a 50 per cent a priori probability of a truly sub-stellar mass.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Access to Published version allowed due to publisher copyright policy.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 17 Mar 2017 04:53
Last Modified: 17 May 2017 02:44
Uncontrolled Keywords: radial velocities; planetary systems; planets and satellites; detection.
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1093/mnras/stv2396
URI: http://eprints.usq.edu.au/id/eprint/30644

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