LAMOST telescope reveals that Neptunian cousins of hot Jupiters are mostly single offspring of stars that are rich in heavy elements
文献类型：期刊论文
| 作者 | Dong, Subo1; Xie, Ji-Wei4,5; Zhou, Ji-Lin4,5; Zheng, Zheng3; Luo, Ali2 |
| 刊名 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
 |
| 出版日期 | 2018-01-09 |
| 卷号 | 115期号:2页码:266-271 |
| ISSN号 | 0027-8424 |
| 关键词 | exoplanets transit metallicity |
| DOI | 10.1073/pnas.1711406115 |
| 英文摘要 | We discover a population of short-period, Neptune-size planets sharing key similarities with hot Jupiters: both populations are preferentially hosted by metal-rich stars, and both are preferentially found in Kepler systems with single-transiting planets. We use accurate Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data Release 4 (DR4) stellar parameters for main-sequence stars to study the distributions of short-period (1 d < P < 10 d) Kepler planets as a function of host star metallicity. The radius distribution of planets around metal-rich stars is more "puffed up" compared with that around metal-poor hosts. In two period-radius regimes, planets preferentially reside around metal-rich stars, while there are hardly any planets around metal-poor stars. One is the well-known hot Jupiters, and the other one is a population of Neptune-size planets {2R circle plus less than or similar to R-p less than or similar to 6R circle plus), dubbed "Floptunes." Also like hot Jupiters, Floptunes occur more frequently in systems with single-transiting planets although the fraction of Floptunes occurring in multiples is larger than that of hot Jupiters. About 1% of solar-type stars host Floptunes, and the frequencies of Floptunes and hot Jupiters increase with consistent trends as a function of [Fe/H]. In the planet radius distribution, hot Jupiters and Floptunes are separated by a "valley" at approximately Saturn size (in the range of 6R circle plus less than or similar to R-p less than or similar to 10R circle plus), and this "hot-Saturn valley" represents approximately an order-of-magnitude decrease in planet frequency compared with hot Jupiters and Floptunes. The empirical "kinship" between Floptunes and hot Jupiters suggests likely common processes (migration and/or formation) responsible for their existence. |
| WOS关键词 | GIANT PLANETS ; DETERMINISTIC MODEL ; METALLICITIES ; MASS ; RANGE ; GAS |
| 资助项目 | National Natural Science Foundation of China (NSFC)[11573003] ; LAMOST Fellowship - Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAS) ; NSFC[11333002] ; NSFC[11661161014] ; NSFC[11403012] ; National Excellent Doctoral Dissertation of People's Republic of China ; National Development and Reform Commission |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| 出版者 | NATL ACAD SCIENCES |
| WOS记录号 | WOS:000419686400039 |
| 资助机构 | National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; LAMOST Fellowship - Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAS) ; LAMOST Fellowship - Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; National Excellent Doctoral Dissertation of People's Republic of China ; National Excellent Doctoral Dissertation of People's Republic of China ; National Development and Reform Commission ; National Development and Reform Commission ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; LAMOST Fellowship - Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAS) ; LAMOST Fellowship - Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; National Excellent Doctoral Dissertation of People's Republic of China ; National Excellent Doctoral Dissertation of People's Republic of China ; National Development and Reform Commission ; National Development and Reform Commission ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; LAMOST Fellowship - Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAS) ; LAMOST Fellowship - Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; National Excellent Doctoral Dissertation of People's Republic of China ; National Excellent Doctoral Dissertation of People's Republic of China ; National Development and Reform Commission ; National Development and Reform Commission ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; LAMOST Fellowship - Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAS) ; LAMOST Fellowship - Center for Astronomical Mega-Science, Chinese Academy of Sciences (CAS) ; NSFC ; NSFC ; National Excellent Doctoral Dissertation of People's Republic of China ; National Excellent Doctoral Dissertation of People's Republic of China ; National Development and Reform Commission ; National Development and Reform Commission |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/37368]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Dong, Subo; Xie, Ji-Wei |
| 作者单位 | 1.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA 4.Nanjing Univ, Key Lab Modern Astron & Astrophys Minist Educ, Nanjing 210093, Jiangsu, Peoples R China 5.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong, Subo,Xie, Ji-Wei,Zhou, Ji-Lin,et al. LAMOST telescope reveals that Neptunian cousins of hot Jupiters are mostly single offspring of stars that are rich in heavy elements[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(2):266-271. |
| APA | Dong, Subo,Xie, Ji-Wei,Zhou, Ji-Lin,Zheng, Zheng,&Luo, Ali.(2018).LAMOST telescope reveals that Neptunian cousins of hot Jupiters are mostly single offspring of stars that are rich in heavy elements.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(2),266-271. |
| MLA | Dong, Subo,et al."LAMOST telescope reveals that Neptunian cousins of hot Jupiters are mostly single offspring of stars that are rich in heavy elements".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.2(2018):266-271. |
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