Semi-Empirical Modeling of the Atmospheres of the M Dwarf Exoplanet Hosts GJ 832 and GJ 581

dc.creatorTilipman, Dennis
dc.creatorVieytes, Mariela Cristina
dc.creatorLinsky, Jeffrey L.
dc.creatorBuccino, Andrea Paola
dc.creatorFrance, Kevin
dc.date2021-03
dc.date.accessioned2023-08-31T00:43:03Z
dc.date.available2023-08-31T00:43:03Z
dc.identifierhttp://hdl.handle.net/11336/182602
dc.identifierTilipman, Dennis; Vieytes, Mariela Cristina; Linsky, Jeffrey L.; Buccino, Andrea Paola; France, Kevin; Semi-Empirical Modeling of the Atmospheres of the M Dwarf Exoplanet Hosts GJ 832 and GJ 581; IOP Publishing; Astrophysical Journal; 909; 1; 3-2021; 1-15
dc.identifier0004-637X
dc.identifier1538-4357
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8543712
dc.descriptionStellar ultraviolet (UV) radiation drives photochemistry, and extreme-ultraviolet (EUV) radiation drives mass loss in exoplanet atmospheres. However, the UV flux is partly unobservable due to interstellar absorption, particularly in the EUV range (100-912 Å). It is therefore necessary to reconstruct the unobservable spectra in order to characterize the radiation environment of exoplanets. In the present work, we use a radiative transfer code SSRPM to build one-dimensional semiempirical models of two M dwarf exoplanet hosts, GJ 832 and GJ 581, and synthesize their spectra. SSRPM is equipped with an extensive atomic and molecular database and full-NLTE capabilities. We use observations in the visible, ultraviolet, and X-ray ranges to constrain atmospheric structures of the modeled stars. The synthesized integrated EUV fluxes are found to be in good agreement with other reconstruction techniques, but the spectral energy distributions disagree significantly across the EUV range. More than two-thirds of the EUV flux is formed above 105 K. We find that the far-ultraviolet (FUV) continuum contributes 42%-54% of the entire FUV flux between 1450 and 1700 Å. The comparison of stellar structures of GJ 832 and GJ 581 suggests that GJ 832 is a more magnetically active star, which is corroborated by other activity indicators.
dc.descriptionFil: Tilipman, Dennis. National Solar Observatory; Estados Unidos. State University of Colorado at Boulder; Estados Unidos
dc.descriptionFil: Vieytes, Mariela Cristina. Universidad Nacional de Tres de Febrero; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.descriptionFil: Linsky, Jeffrey L.. State University of Colorado at Boulder; Estados Unidos
dc.descriptionFil: Buccino, Andrea Paola. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
dc.descriptionFil: France, Kevin. State University of Colorado at Boulder; Estados Unidos
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dc.formatapplication/pdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherIOP Publishing
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/abd62f#artAbst
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/abd62f
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2012.11738
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttps://creativecommons.org/licenses/by/2.5/ar/
dc.subjectSTARS: LOW MASS
dc.subjectSTARS: LATE TYPE
dc.subjectSTARS:CHROMOSPHERES
dc.subjectSTARS:CORONA
dc.subjectULTRAVIOLET:STARS
dc.subjectSTARS:INDIVIDUAL (GJ 832, GJ 581)
dc.subjecthttps://purl.org/becyt/ford/1.3
dc.subjecthttps://purl.org/becyt/ford/1
dc.titleSemi-Empirical Modeling of the Atmospheres of the M Dwarf Exoplanet Hosts GJ 832 and GJ 581
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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