干旱区生态环境知识资源中心(Arid): Sculpting the Sub-Saturn Occurrence Rate via Atmospheric Mass Loss

Arid

DOI	10.3847/1538-4357/ac32c9
	Sculpting the Sub-Saturn Occurrence Rate via Atmospheric Mass Loss
	Hallatt, Tim; Lee, Eve J.
通讯作者	Hallatt, T (corresponding author)，McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada. ; Hallatt, T (corresponding author)，McGill Univ, McGill Space Inst, Montreal, PQ H3A 2T8, Canada. ; Hallatt, T (corresponding author)，Inst Res Exoplanets iREx, Montreal, PQ, Canada.
来源期刊	ASTROPHYSICAL JOURNAL
ISSN	0004-637X
EISSN	1538-4357
出版年	2022
卷号	924 期号:1
英文摘要	The sub-Saturn (similar to 4-8 R (circle plus)) occurrence rate rises with orbital period out to at least similar to 300 days. In this work we adopt and test the hypothesis that the decrease in their occurrence toward the star is a result of atmospheric mass loss, which can transform sub-Saturns into sub-Neptunes (less than or similar to 4 R (circle plus)) more efficiently at shorter periods. We show that under the mass-loss hypothesis, the sub-Saturn occurrence rate can be leveraged to infer their underlying core mass function, and, by extension, that of gas giants. We determine that lognormal core mass functions peaked near similar to 10-20 M (circle plus) are compatible with the sub-Saturn period distribution, the distribution of observationally inferred sub-Saturn cores, and gas-accretion theories. Our theory predicts that close-in sub-Saturns should be similar to 50% less common and similar to 30% more massive around rapidly rotating stars; this should be directly testable for stars younger than less than or similar to 500 Myr. We also predict that the sub-Jovian desert becomes less pronounced and opens up at smaller orbital periods around M stars compared to solar-type stars (similar to 0.7 days versus similar to 3 days). We demonstrate that exceptionally low-density sub-Saturns, super-puffs, can survive intense hydrodynamic escape to the present day if they are born with even larger atmospheres than they currently harbor; in this picture, Kepler 223 d began with an envelope similar to 1.5x the mass of its core and is currently losing its envelope at a rate of similar to 2 x 10(-3) M (circle plus) Myr(-1). If the predictions from our theory are confirmed by observations, the core mass function we predict can also serve to constrain core formation theories of gas-rich planets.
类型	Article
语种	英语
开放获取类型	hybrid, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000739037300001
WOS关键词	GIANT PLANET ; X-RAY ; EXTRASOLAR ; MIGRATION ; DESERT ; STARS ; POPULATION ; DYNAMICS ; CORES ; MODEL
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/2XILL650/376832
作者单位	[Hallatt, Tim; Lee, Eve J.] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada; [Hallatt, Tim; Lee, Eve J.] McGill Univ, McGill Space Inst, Montreal, PQ H3A 2T8, Canada; [Hallatt, Tim; Lee, Eve J.] Inst Res Exoplanets iREx, Montreal, PQ, Canada
推荐引用方式 GB/T 7714	Hallatt, Tim,Lee, Eve J.. Sculpting the Sub-Saturn Occurrence Rate via Atmospheric Mass Loss[J],2022,924(1).
APA	Hallatt, Tim,&Lee, Eve J..(2022).Sculpting the Sub-Saturn Occurrence Rate via Atmospheric Mass Loss.ASTROPHYSICAL JOURNAL,924(1).
MLA	Hallatt, Tim,et al."Sculpting the Sub-Saturn Occurrence Rate via Atmospheric Mass Loss".ASTROPHYSICAL JOURNAL 924.1(2022).