干旱区生态环境知识资源中心(Arid): The Gaia-Kepler Stellar Properties Catalog. II. Planet Radius Demographics as a Function of Stellar Mass and Age

Arid

DOI	10.3847/1538-3881/aba18a
	The Gaia-Kepler Stellar Properties Catalog. II. Planet Radius Demographics as a Function of Stellar Mass and Age
	Berger, Travis A.; Huber, Daniel; Gaidos, Eric; van Saders, Jennifer L.; Weiss, Lauren M.
通讯作者	Berger, TA
来源期刊	ASTRONOMICAL JOURNAL
ISSN	0004-6256
EISSN	1538-3881
出版年	2020
卷号	160 期号:3
英文摘要	Studies of exoplanet demographics require large samples and precise constraints on exoplanet host stars. Using the homogeneous Kepler stellar properties derived using the Gaia Data Release 2 by Berger et al., we recompute Kepler planet radii and incident fluxes and investigate their distributions with stellar mass and age. We measure the stellar mass dependence of the planet radius valley to be d log R-p/d log M-* = 0.26(-0.16)(+0.21), consistent with the slope predicted by a planet mass dependence on stellar mass (0.24-0.35) and core-powered mass loss (0.33). We also find the first evidence of a stellar age dependence of the planet populations straddling the radius valley. Specifically, we determine that the fraction of super-Earths (1-1.8 R-circle plus) to sub-Neptunes (1.8-3.5 R-circle plus) increases from 0.61 +/- 0.09 at young ages (<1 Gyr) to 1.00 +/- 0.10 at old ages (>1 Gyr), consistent with the prediction by core-powered mass loss that the mechanism shaping the radius valley operates over Gyr timescales. Additionally, we find a tentative decrease in the radii of relatively cool (F-p < 150 F-circle plus) sub-Neptunes over Gyr timescales, which suggests that these planets may possess H/He envelopes instead of higher mean molecular weight atmospheres. We confirm the existence of planets within the hot sub-Neptunian desert (2.2 R-circle plus < R-p < 3.8 R-circle plus, F-p > 650 F-circle plus) and show that these planets are preferentially orbiting more evolved stars compared to other planets at similar incident fluxes. In addition, we identify candidates for cool (F-p < 20 F-circle plus) inflated Jupiters, present a revised list of habitable zone candidates, and find that the ages of single and multiple transiting planet systems are statistically indistinguishable.
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000561608500001
WOS关键词	SHORT-PERIOD PLANETS ; HOT-JUPITERS ; TIME-SCALES ; EVOLUTION ; STARS ; DEPENDENCE ; SIGNATURES ; NEPTUNES ; VALLEY
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325754
作者单位	[Berger, Travis A.; Huber, Daniel; van Saders, Jennifer L.; Weiss, Lauren M.] Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA; [Gaidos, Eric] Univ Hawaii Manoa, Dept Earth Sci, Honolulu, HI 96822 USA
推荐引用方式 GB/T 7714	Berger, Travis A.,Huber, Daniel,Gaidos, Eric,et al. The Gaia-Kepler Stellar Properties Catalog. II. Planet Radius Demographics as a Function of Stellar Mass and Age[J],2020,160(3).
APA	Berger, Travis A.,Huber, Daniel,Gaidos, Eric,van Saders, Jennifer L.,&Weiss, Lauren M..(2020).The Gaia-Kepler Stellar Properties Catalog. II. Planet Radius Demographics as a Function of Stellar Mass and Age.ASTRONOMICAL JOURNAL,160(3).
MLA	Berger, Travis A.,et al."The Gaia-Kepler Stellar Properties Catalog. II. Planet Radius Demographics as a Function of Stellar Mass and Age".ASTRONOMICAL JOURNAL 160.3(2020).