One or more bound planets per Milky Way star from microlensing observations
摘要：
Most known extrasolar planets (exoplanets) have been discovered using the radial velocity or transit methods. Both are biased towards planets that are relatively close to their parent stars, and studies find that around 17-30% (refs 4, 5) of solar-like stars host a planet. Gravitational microlensing, on the other hand, probes planets that are further away from their stars. Recently, a population of planets that are unbound or very far from their stars was discovered by microlensing. These planets are at least as numerous as the stars in the Milky Way. Here we report a statistical analysis of microlensing data (gathered in 2002-07) that reveals the fraction of bound planets 0.5-10AU (Sun-Earth distance) from their stars. We find that 17(+6)(-9)% of stars host Jupiter-mass planets (0.3-10M(J), where M(J) = 318M(⊕) and M(⊕) is Earth's mass). Cool Neptunes (10-30M(⊕)) and super-Earths (5-10M(⊕)) are even more common: their respective abundances per star are 52(+22)(-29)% and 62(+35)(-37)%. We conclude that stars are orbited by planets as a rule, rather than the exception.
展开
关键词：
Theoretical or Mathematical/ dwarf stars extrasolar planets gravitational lenses statistical analysis/ Milky Way star microlensing observation extrasolar planets exoplanets radial velocity transit method parent stars solar-like stars planet host gravitational microlensing planet population statistical analysis microlensing data AD 2002 to 2007 Jupiter-mass planets cool Neptunes superEarth heliocentric distance 0.5 AU to 10 AU/ A9785 Extrasolar planetary systems A9530S Relativity and gravitation in astrophysics A0250 Probability theory, stochastic processes, and statistics/ heliocentric distance 5.0E-01 to 1.0E+01 AU
DOI：
10.1038/nature10684
被引量：
Springer
Nature
(全网免费下载)
Nature
国家科技图书文献中心
(权威机构)
EBSCO
查看更多
万方医学
Semantic Scholar
(全网免费下载)
万方医学
掌桥科研
Semantic Scholar
Ingenta
dx.doi.org
NCBI
NCBI
Europe PMC
arXiv.org
(全网免费下载)
arXiv.org
arXiv.org
(全网免费下载)
arXiv.org
OALib
adsabs.harvard.edu
ui.adsabs.harvard.edu
ResearchGate
(全网免费下载)
ResearchGate
ProQuest
EBSCO
EBSCO
Citeseer
(全网免费下载)
santui.eu.org
(全网免费下载)
deepimpact.eso.org
(全网免费下载)
学术范
mysciencework.com
sternwarte.uni-erlangen.de
(全网免费下载)
hq.eso.org
(全网免费下载)
inspirehep.net
rsta.royalsocietypublishing.org
dev.related-work.net
hubblesite.org
(全网免费下载)
pubfacts.com
core.kmi.open.ac.uk
lanchart.hum.ku.dk
www.socolar.com
kan.ddns.net
(全网免费下载)
authors.library.caltech.edu
wwwstaff.ari.uni-heidelberg.de
(全网免费下载)
bib.irb.hr
imgsrc.hubblesite.org
(全网免费下载)
eso.org
(全网免费下载)
钛学术
(全网免费下载)
onacademic.com
cosmos.physast.uga.edu
(全网免费下载)
lib-arxiv-008.serverfarm.cornell.edu
philpapers.org
core.ac.uk
(全网免费下载)
core.ac.uk
mendeley.com
ideas.repec.org
advances.sciencemag.org
prima.santui.eu.org
(全网免费下载)
cds.cern.ch
pubget.com
ecite.utas.edu.au
scienceopen.com
arch.neicon.ru
hubblesite.org
(全网免费下载)
学术范
(全网免费下载)
deepdyve.com
readcube.com
钛学术
Nature
(全网免费下载)
Semantic Scholar
(全网免费下载)
arXiv.org
(全网免费下载)
arXiv.org
(全网免费下载)
ResearchGate
(全网免费下载)
Citeseer
(全网免费下载)
prima.santui.eu.org
(全网免费下载)
kan.ddns.net
(全网免费下载)
钛学术
(全网免费下载)
cosmos.physast.uga.edu
(全网免费下载)
sternwarte.uni-erlangen.de
(全网免费下载)
santui.eu.org
(全网免费下载)
hubblesite.org
(全网免费下载)
hubblesite.org
(全网免费下载)
wwwstaff.ari.uni-heidelberg.de
(全网免费下载)
hq.eso.org
(全网免费下载)
imgsrc.hubblesite.org
(全网免费下载)
deepimpact.eso.org
(全网免费下载)
eso.org
(全网免费下载)
core.ac.uk
(全网免费下载)
学术范
(全网免费下载)
通过文献互助平台发起求助，成功后即可免费获取论文全文。
相似文献
参考文献
引证文献
来源期刊
引用走势
辅助模式
引用
文献可以批量引用啦~
欢迎点我试用！
