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dc.contributor.authorBuchhave, Lars A.
dc.contributor.authorLatham, David W.
dc.contributor.authorJohansen, Anders
dc.contributor.authorBizzarro, Martin
dc.contributor.authorTorres, Guillermo
dc.contributor.authorRowe, Jason F.
dc.contributor.authorBatalha, Natalie M.
dc.contributor.authorBorucki, William J.
dc.contributor.authorBrugamyer, Erik
dc.contributor.authorCaldwell, Caroline
dc.contributor.authorBryson, Stephen T.
dc.contributor.authorCiardi, David R.
dc.contributor.authorCochran, William D.
dc.contributor.authorEndl, Michael
dc.contributor.authorEsquerdo, Gilbert A.
dc.contributor.authorFord, Eric B.
dc.contributor.authorGeary, John C.
dc.contributor.authorGilliland, Ronald L.
dc.contributor.authorHansen, Terese
dc.contributor.authorIsaacson, Howard
dc.contributor.authorLaird, John B.
dc.contributor.authorLucas, P.W.
dc.contributor.authorMarcy, Geoffrey W.
dc.contributor.authorMorse, Jon A.
dc.contributor.authorRobertson, Paul
dc.contributor.authorShporer, Avi
dc.contributor.authorStefanik, Robert P.
dc.contributor.authorStill, Martin
dc.contributor.authorQuinn, Samuel N.
dc.identifier.citationBuchhave , L A , Latham , D W , Johansen , A , Bizzarro , M , Torres , G , Rowe , J F , Batalha , N M , Borucki , W J , Brugamyer , E , Caldwell , C , Bryson , S T , Ciardi , D R , Cochran , W D , Endl , M , Esquerdo , G A , Ford , E B , Geary , J C , Gilliland , R L , Hansen , T , Isaacson , H , Laird , J B , Lucas , P W , Marcy , G W , Morse , J A , Robertson , P , Shporer , A , Stefanik , R P , Still , M & Quinn , S N 2012 , ' An abundance of small exoplanets around stars with a wide range of metallicities ' , Nature , vol. 486 , no. 7403 , pp. 375-377 .
dc.identifier.otherPURE: 959705
dc.identifier.otherPURE UUID: add15974-7720-4ecb-99c1-5cf2018ff252
dc.identifier.otherWOS: 000305466800037
dc.identifier.otherScopus: 84862569033
dc.identifier.otherORCID: /0000-0002-8872-4462/work/62748825
dc.description.abstractThe abundance of heavy elements (metallicity) in the photospheres of stars similar to the Sun provides a 'fossil' record of the chemical composition of the initial protoplanetary disk. Metal-rich stars are much more likely to harbour gas giant planets(1-4), supporting the model that planets form by accumulation of dust and ice particles(5). Recent ground-based surveys suggest that this correlation is weakened for Neptunian-sized planets(4,6-9). However, how the relationship between size and metallicity extends into the regime of terrestrial-sized exoplanets is unknown. Here we report spectroscopic metallicities of the host stars of 226 small exoplanet candidates discovered by NASA's Kepler mission(10), including objects that are comparable in size to the terrestrial planets in the Solar System. We find that planets with radii less than four Earth radii form around host stars with a wide range of metallicities (but on average a metallicity close to that of the Sun), whereas large planets preferentially form around stars with higher metallicities. This observation suggests that terrestrial planets may be widespread in the disk of the Galaxy, with no special requirement of enhanced metallicity for their formation.en
dc.titleAn abundance of small exoplanets around stars with a wide range of metallicitiesen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
rioxxterms.typeJournal Article/Review

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