The abundance distribution of stars with planets
Article
Article Title | The abundance distribution of stars with planets |
---|---|
ERA Journal ID | 1074 |
Article Category | Article |
Authors | Bond, J. C. (Author), Tinney, C. G. (Author), Butler, R. P. (Author), Jones, H. A. (Author), Marcy, G. W. (Author), Penny, A. J. (Author) and Carter, B. D. (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 370 (1), pp. 163-173 |
Number of Pages | 11 |
Year | 2006 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1111/j.1365-2966.2006.10459.x |
Web Address (URL) | https://academic.oup.com/mnras/article/370/1/163/1024964 |
Abstract | We present the results of a uniform, high-precision spectroscopic metallicity study of 136 G-type stars from the Anglo-Australian Planet Search, 20 of which are known to harbour extrasolar planets (as at 2005 July). Abundances in Fe, C, Na, Al, Si, Ca, Ti and Ni are presented, along with Strömgen photometric metallicities. This study is one of several recent studies examining the metallicities of a sample of planet-host and non-planet-host stars that were obtained from a single sample, and analysed in an identical manner, providing an unbiased estimate of the metallicity trends for planet-bearing stars. We find that non-parametric tests of the distribution of metallicities for planet-host and non-planet-host stars are significantly different at a level of 99.4 per cent confidence. We confirm the previously observed trend for planet-host stars to have higher mean metallicities than non-planet-host stars, with a mean metallicity for planet-host stars of [Fe/H]= 0.06 ± 0.03 dex compared with [Fe/H]=−0.09 ± 0.01 dex for non-host-stars in our sample. This enrichment is also seen in the other elements studied. Based on our findings, we suggest that this observed enhancement is more likely a relic of the original gas cloud from which the star and its planets formed, rather than being due to `pollution' of the stellar photosphere. |
Keywords | stars; abundances; chemically peculiar; planetary systems |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
519999. Other physical sciences not elsewhere classified | |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2006 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Byline Affiliations | University of Arizona, United States |
Anglo-Australian Observatory, Australia | |
Carnegie Institution of Washington, United States | |
University of Hertfordshire, United Kingdom | |
University of California, United States | |
Rutherford Appleton Laboratory, United Kingdom | |
Department of Biological and Physical Sciences |
https://research.usq.edu.au/item/9y51v/the-abundance-distribution-of-stars-with-planets
Download files
Published Version
Bond_Tinney_Butler_Jones_Marcy_Penny_Carter_Publ_version.pdf | ||
File access level: Anyone |
2021
total views200
total downloads3
views this month1
downloads this month