A Neptune-mass planet orbiting the nearby G dwarf HD 16417
Article
Article Title | A Neptune-mass planet orbiting the nearby G dwarf HD 16417 |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | O'Toole, Simon (Author), Tinney, C. G. (Author), Butler, R. Paul (Author), Jones, Hugh R. A. (Author), Bailey, Jeremy (Author), Carter, Brad D. (Author), Vogt, Steven S. (Author), Laughlin, Gregory (Author) and Rivera, Eugenio J. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 697 (2), pp. 1263-1268 |
Number of Pages | 5 |
Year | 2009 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/697/2/1263 |
Web Address (URL) | https://iopscience.iop.org/article/10.1088/0004-637X/697/2/1263 |
Abstract | Precision Doppler measurements from an intensive 48 night 'Rocky Planet Search' observing campaign on the Anglo-Australian Telescope (AAT) have revealed the presence of a low-mass exoplanet orbiting the G1 dwarf HD16417. Subsequent Doppler observations with the AAT, as well as independent observations obtained by the Keck Planet Search, have confirmed this initial detection and refine the orbital parameters to period 17.24+/-0.01 d, eccentricity 0.20+/-0.09, orbital semi-major axis 0.14+/-0.01 AU and minimum planet mass 22.1+/-2.0 Mearth. HD 16417 raises the number of published exoplanets with minimum masses of less than 25 Mearth to eighteen. Interestingly, the distribution of detected sub-25 Mearth planets over the spectral types G, K and M is almost uniform. The detection of HD 16417b by an intensive observing campaign clearly demonstrates the need for extended and contiguous observing campaigns when aiming to detect low-amplitude Doppler planets in short period orbits. Perhaps most critically it demonstrates that the search for low-mass Doppler planets will eventually require these traditional 'bright-time' projects to extend throughout dark lunations. |
Keywords | planetary systems; stars; individual: HD 16417 |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
519999. Other physical sciences not elsewhere classified | |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Anglo-Australian Observatory, Australia |
University of New South Wales | |
Carnegie Institution of Washington, United States | |
University of Hertfordshire, United Kingdom | |
Department of Biological and Physical Sciences | |
University of California, United States |
https://research.usq.edu.au/item/9z336/a-neptune-mass-planet-orbiting-the-nearby-g-dwarf-hd-16417
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