干旱区生态环境知识资源中心(Arid): Evidence for He i 10830 A Absorption during the Transit of a Warm Neptune around the M-dwarf GJ 3470 with the Habitable-zone Planet Finder

Arid

DOI	10.3847/1538-4357/ab8559
	Evidence for He i 10830 A Absorption during the Transit of a Warm Neptune around the M-dwarf GJ 3470 with the Habitable-zone Planet Finder
	Ninan, Joe P.1,2; Stefansson, Gudmundur 1,2,3; Mahadevan, Suvrath 1,2; Bender, Chad 4; Robertson, Paul 5; Ramsey, Lawrence 1,2; Terrien, Ryan 6; Wright, Jason 1,2,7; Diddams, Scott A.8,9; Kanodia, Shubham 1,2; Cochran, William 10,11; Endl, Michael 10,11; Ford, Eric B.1,2,12; Fredrick, Connor 8,9; Halverson, Samuel 13; Hearty, Fred 1,2; Jennings, Jeff 8,9; Kaplan, Kyle 4; Lubar, Emily 10,11; Metcalf, Andrew J.8,9,14; Monson, Andrew 1,2; Nitroy, Colin 1,2; Roy, Arpita 15; Schwab, Christian 16
通讯作者	Ninan, Joe P.
来源期刊	ASTROPHYSICAL JOURNAL
ISSN	0004-637X
EISSN	1538-4357
出版年	2020
卷号	894 期号:2
英文摘要	Understanding the dynamics and kinematics of outflowing atmospheres of hot and warm exoplanets is crucial to understanding the origins and evolutionary history of the exoplanets near the evaporation desert. Recently, ground-based measurements of the meta-stable helium atom's resonant absorption at 10830 A has become a powerful probe of the base environment which is driving the outflow of exoplanet atmospheres. We report evidence for the He i 10830 A in absorption (equivalent width similar to 0.012 0.002 A) in the exosphere of a warm Neptune orbiting the M-dwarf GJ 3470, during three transits using the Habitable Zone Planet Finder near-infrared spectrograph. This marks the first reported evidence for He i 10830 A atmospheric absorption for a planet orbiting an M-dwarf. Our detected absorption is broad and its blueshifted wing extends to -36 km s(-1), the largest reported in the literature to date. We modeled the state of helium atoms in the exosphere of GJ3470b based on assumptions on the UV and X-ray flux of GJ 3470, and found our measurement of flux-weighted column density of meta-stable state helium derived from our transit observations, to be consistent with the model, within its uncertainties. The methodology developed here will be useful to study and constrain the atmospheric outflow models of other exoplanets like GJ 3470b, which are near the edge of the evaporation desert.
类型	Article
语种	英语
国家	USA ; Australia
开放获取类型	Green Submitted, Green Accepted, Bronze
收录类别	SCI-E
WOS记录号	WOS:000534291400001
WOS关键词	ATOMIC DATABASE ; EMISSION-LINES ; 2 S-3 ; HYDROGEN ; HELIUM ; PHOTOIONIZATION ; SPECTROSCOPY ; ATMOSPHERE ; CHIANTI ; MASS
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
来源机构	University of Arizona
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319017
作者单位	1.Penn State Univ, Dept Astron & Astrophys, Davey Lab 525, University Pk, PA 16802 USA; 2.Penn State Univ, Ctr Exoplanets & Habitable Worlds, Davey Lab 525, University Pk, PA 16802 USA; 3.Princeton Univ, Dept Astrophys Sci, 4 Ivy Lane, Princeton, NJ 08540 USA; 4.Univ Arizona, Steward Observ, Tucson, AZ 85721 USA; 5.Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA; 6.Carleton Coll, Dept Phys & Astron, Northfield, MN 55057 USA; 7.Penn State Astrobiol Res Ctr, University Pk, PA 16802 USA; 8.NIST, 325 Broadway, Boulder, CO 80305 USA; 9.Univ Colorado, Dept Phys, 2000 Colorado Ave, Boulder, CO 80309 USA; 10.Univ Texas Austin, Dept Astron, 2515 Speedway,Stop C1400, Austin, TX 78712 USA; 11.Univ Texas Austin, McDonald Observ, 2515 Speedway,Stop C1400, Austin, TX 78712 USA; 12.Penn State Univ, Inst CyberSci, Davey Lab 525, University Pk, PA 16802 USA; 13.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA; 14.Air Force Res Lab, Space Vehicles Directorate, 3550 Aberdeen Ave SE, Kirtland AFB, NM 87117 USA; 15.CALTECH, 1200 E Calif Blvd, Pasadena, CA 91125 USA; 16.Macquarie Univ, Dept Phys & Astron, N Ryde, NSW 2109, Australia
推荐引用方式 GB/T 7714	Ninan, Joe P.,Stefansson, Gudmundur,Mahadevan, Suvrath,et al. Evidence for He i 10830 A Absorption during the Transit of a Warm Neptune around the M-dwarf GJ 3470 with the Habitable-zone Planet Finder[J]. University of Arizona,2020,894(2).
APA	Ninan, Joe P..,Stefansson, Gudmundur.,Mahadevan, Suvrath.,Bender, Chad.,Robertson, Paul.,...&Schwab, Christian.(2020).Evidence for He i 10830 A Absorption during the Transit of a Warm Neptune around the M-dwarf GJ 3470 with the Habitable-zone Planet Finder.ASTROPHYSICAL JOURNAL,894(2).
MLA	Ninan, Joe P.,et al."Evidence for He i 10830 A Absorption during the Transit of a Warm Neptune around the M-dwarf GJ 3470 with the Habitable-zone Planet Finder".ASTROPHYSICAL JOURNAL 894.2(2020).