An exoplanet in orbit around τ 1 Gruis
Article
Article Title | An exoplanet in orbit around τ 1 Gruis |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Jones, Hugh R. A. (Author), Butler, R. Paul (Author), Tinney, Chris G. (Author), Marcy, Geoffrey W. (Author), Penny, Alan J. (Author), McCarthy, Chris (Author) and Carter, Brad D. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 341 (3), pp. 948-952 |
Number of Pages | 5 |
Year | 2003 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1046/j.1365-8711.2003.06481.x |
Web Address (URL) | https://academic.oup.com/mnras/article/341/3/948/1006948 |
Abstract | We report the detection of a new candidate exoplanet around the metal-rich star τ1 Gruis. With M sin i= 1.26 ± 0.18 MJup , a period of 1391 ± 300 d and an orbit with an eccentricity of 0.14 ± 0.14 it adds to the growing population of long-period exoplanets with low-eccentricity orbits. This population now comprises more than 20 per cent of known exoplanets. When the companion to τ1 Gruis is plotted together with all exoplanets found by radial velocity searches we find evidence for a peak in the number of short-period exoplanets, followed by a minimum of planets between approximately 5 and 50 d and then an apparent rise in the number of planets per unit radius that seems to set in by 100 d, indicating more planets further from the host star. This is very different from the Gaussian-like period distribution found for stellar companions. This lends support to the idea that once a clearing in the inner protoplanetary disc develops, it halts the inward migration of planets. In particular, the smooth distribution of exoplanets arising from planetary migration through a disc is altered by an accumulation of exoplanets at the point where the disc has been cleared out. |
Keywords | exoplanet; tau(1)Gruis |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2003 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Byline Affiliations | Liverpool John Moores University, United Kingdom |
Carnegie Institution of Washington, United States | |
Anglo-Australian Observatory, Australia | |
University of California, United States | |
Rutherford Appleton Laboratory, United Kingdom | |
University of Southern Queensland |
https://research.usq.edu.au/item/9zv07/an-exoplanet-in-orbit-around-1-gruis
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