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dc.contributor.authorWittenmyer, Robert A.
dc.contributor.authorTinney, C. G.
dc.contributor.authorButler, R. P.
dc.contributor.authorO'Toole, Simon J.
dc.contributor.authorJones, H.R.A.
dc.contributor.authorCarter, B. D.
dc.contributor.authorBailey, J.
dc.contributor.authorHorner, J.
dc.date.accessioned2011-09-14T10:01:06Z
dc.date.available2011-09-14T10:01:06Z
dc.date.issued2011-09
dc.identifier.citationWittenmyer , R A , Tinney , C G , Butler , R P , O'Toole , S J , Jones , H R A , Carter , B D , Bailey , J & Horner , J 2011 , ' The frequency of low-mass exoplanets III. Toward eta-Earth at short periods ' , The Astrophysical Journal , vol. 738 , no. 1 , 81 . https://doi.org/10.1088/0004-637X/738/1/81
dc.identifier.issn0004-637X
dc.identifier.otherPURE: 347272
dc.identifier.otherPURE UUID: 27fed8ff-f614-4724-ac32-bd5d6cf4565e
dc.identifier.otherWOS: 000294015500081
dc.identifier.otherScopus: 80052726189
dc.identifier.urihttp://hdl.handle.net/2299/6417
dc.description‘In these times, during the rise in the popularity of institutional repositories, the Society does not forbid authors from depositing their work in such repositories. However, the AAS regards the deposit of scholarly work in such repositories to be a decision of the individual scholar, as long as the individual's actions respect the diligence of the journals and their reviewers.’ Original article can be found at : http://iopscience.iop.org/ Copyright American Astronomical Society
dc.description.abstractDetermining the occurrence rate of "super-Earth" planets (m sin i < 10 M ) is a critically important step on the path toward determining the frequency of Earth-like planets (η), and hence the uniqueness of our solar system. Current radial-velocity surveys, achieving precisions of 1ms, are now able to detect super-Earths and provide meaningful estimates of their occurrence rate. We present an analysis of 67 solar-type stars from the Anglo-Australian Planet Search specifically targeted for very high precision observations. When corrected for incompleteness, we find that the planet occurrence rate increases sharply with decreasing planetary mass. Our results are consistent with those from other surveys: in periods shorter than 50 days, we find that 3.0% of stars host a giant (msin i > 100 M ) planet, and that 17.4% of stars host a planet with msin i < 10 M . The preponderance of low-mass planets in short-period orbits is in conflict with formation simulations in which the majority of super-Earths reside at larger orbital distances. This work gives a hint as to the size of η, but to make meaningful predictions on the frequency of terrestrial planets in longer, potentially habitable orbits, low-mass terrestrial planet searches at periods of 100-200 days must be made an urgent priority for ground-based Doppler planet searches in the years ahead.en
dc.language.isoeng
dc.relation.ispartofThe Astrophysical Journal
dc.subjectplanetary systems
dc.subjecttechniques
dc.subjectradial velocities
dc.titleThe frequency of low-mass exoplanets III. Toward eta-Earth at short periodsen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.identifier.urlhttp://www.scopus.com/inward/record.url?scp=80052726189&partnerID=8YFLogxK
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1088/0004-637X/738/1/81
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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