干旱区生态环境知识资源中心(Arid): An ultrahot Neptune in the Neptune desert

Arid

DOI	10.1038/s41550-020-1142-z
	An ultrahot Neptune in the Neptune desert
	Jenkins, James S.; Diaz, Matias R.; Kurtovic, Nicolas T.; Espinoza, Nestor; Vines, Jose I.; Rojas, Pablo A. Pena; Brahm, Rafael; Torres, Pascal; Cortes-Zuleta, Pia; Soto, Maritza G.; Lopez, Eric D.; King, George W.; Wheatley, Peter J.; Winn, Joshua N.; Ciardi, David R.; Ricker, George; Vanderspek, Roland; Latham, David W.; Seager, Sara; Jenkins, Jon M.; Beichman, Charles A.; Bieryla, Allyson; Burke, Christopher J.; Christiansen, Jessie L.; Henze, Christopher E.; Klaus, Todd C.; McCauliff, Sean; Mori, Mayuko; Narita, Norio; Nishiumi, Taku; Tamura, Motohide; de Leon, Jerome Pitogo; Quinn, Samuel N.; Villasenor, Jesus Noel; Vezie, Michael; Lissauer, Jack J.; Collins, Karen A.; Collins, Kevin I.; Isopi, Giovanni; Mallia, Franco; Ercolino, Andrea; Petrovich, Cristobal; Jordan, Andres; Acton, Jack S.; Armstrong, David J.; Bayliss, Daniel; Bouchy, Francois; Belardi, Claudia; Bryant, Edward M.; Burleigh, Matthew R.; Cabrera, Juan; Casewell, Sarah L.; Chaushev, Alexander; Cooke, Benjamin F.; Eigmueller, Philipp; Erikson, Anders; Foxell, Emma; Gansicke, Boris T.; Gill, Samuel; Gillen, Edward; Guenther, Maximilian N.; Goad, Michael R.; Hooton, Matthew J.; Jackman, James A. G.; Louden, Tom; McCormac, James; Moyano, Maximiliano; Nielsen, Louise D.; Pollacco, Don; Queloz, Didier; Rauer, Heike; Raynard, Liam; Smith, Alexis M. S.; Tilbrook, Rosanna H.; Titz-Weider, Ruth; Turner, Oliver; Udry, Stephane; Walker, Simon. R.; Watson, Christopher A.; West, Richard G.; Palle, Enric; Ziegler, Carl; Law, Nicholas; Mann, Andrew W.
通讯作者	Jenkins, JS
来源期刊	NATURE ASTRONOMY
ISSN	2397-3366
出版年	2020
卷号	4 期号:12
英文摘要	About 1 out of 200 Sun-like stars has a planet with an orbital period shorter than one day: an ultrashort-period planet(1,2). All of the previously known ultrashort-period planets are either hot Jupiters, with sizes above 10 Earth radii (R-circle plus), or apparently rocky planets smaller than 2 R-circle plus. Such lack of planets of intermediate size (the `hot Neptune desert') has been interpreted as the inability of low-mass planets to retain any hydrogen/ helium (H/He) envelope in the face of strong stellar irradiation. Here we report the discovery of an ultrashort-period planet with a radius of 4.6 R-circle plus and a mass of 29 M-circle plus, firmly in the hot Neptune desert. Data from the Transiting Exoplanet Survey Satellite(3) revealed transits of the bright Sun-like star LTT 9779 every 0.79 days. The planet's mean density is similar to that of Neptune, and according to thermal evolution models, it has a H/He-rich envelope constituting 9.0(-2.9)(+2.7) % of the total mass. With an equilibrium temperature around 2,000 K, it is unclear how this `ultrahot Neptune' managed to retain such an envelope. Follow-up observations of the planet's atmosphere to better understand its origin and physical nature will be facilitated by the star's brightness (V-mag = 9.8).
类型	Article
语种	英语
开放获取类型	Green Submitted, Green Accepted, Green Published
收录类别	SCI-E
WOS记录号	WOS:000571722300001
WOS关键词	PLANETS ; ATMOSPHERE ; EXOPLANETS ; ALGORITHM ; EFFICIENT ; DWARFS ; STARS ; TOOL
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
来源机构	University of London
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326427
作者单位	[Jenkins, James S.; Diaz, Matias R.; Kurtovic, Nicolas T.; Vines, Jose I.; Rojas, Pablo A. Pena; Cortes-Zuleta, Pia] Univ Chile, Dept Astron, Las Condes, Chile; [Jenkins, James S.; Diaz, Matias R.] Ctr Astrofis & Tecnol Afines CATA, Santiago, Chile; [Espinoza, Nestor] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA; [Brahm, Rafael; Torres, Pascal] Pontificia Univ Catolica Chile, Ctr Astroengn UC, Santiago, Chile; [Brahm, Rafael; Jordan, Andres] Millennium Inst Astrophys, Santiago, Chile; [Soto, Maritza G.] Queen Mary Univ London, Sch Phys & Astron, London, England; [Lopez, Eric D.] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA; [King, George W.; Wheatley, Peter J.; Armstrong, David J.; Bayliss, Daniel; Bryant, Edward M.; Cooke, Benjamin F.; Foxell, Emma; Gansicke, Boris T.; Gill, Samuel; Jackman, James A. G.; Louden, Tom; McCormac, James; Pollacco, Don; Walker, Simon. R.; West, Richard G.] Univ Warwick, Dept Phys, Coventry, W Midlands, England; [King, George W.; Wheatley, Peter J...
推荐引用方式 GB/T 7714	Jenkins, James S.,Diaz, Matias R.,Kurtovic, Nicolas T.,et al. An ultrahot Neptune in the Neptune desert[J]. University of London,2020,4(12).
APA	Jenkins, James S..,Diaz, Matias R..,Kurtovic, Nicolas T..,Espinoza, Nestor.,Vines, Jose I..,...&Mann, Andrew W..(2020).An ultrahot Neptune in the Neptune desert.NATURE ASTRONOMY,4(12).
MLA	Jenkins, James S.,et al."An ultrahot Neptune in the Neptune desert".NATURE ASTRONOMY 4.12(2020).