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dc.contributor.author
Youngblood, Allison
dc.contributor.author
France, Kevin
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Loyd, R. O. Parke
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Brown, Alexander
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Mason, James P.
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Schneider, P. Christian
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Tilley, Matt A.
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Berta-Thompson, Zachory K.
dc.contributor.author
Buccino, Andrea Paola
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Froning, Cynthia S.
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Hawley, Suzanne L.
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Linsky, Jeffrey
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Mauas, Pablo Jacobo David
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Redfield, Seth
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Kowalski, Adam
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Miguel, Yamila
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Newton, Elisabeth R.
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Rugheimer, Sarah
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Segura, Antígona
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Roberge, Aki
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Vieytes, Mariela Cristina
dc.date.available
2019-01-14T15:27:25Z
dc.date.issued
2017-07
dc.identifier.citation
Youngblood, Allison; France, Kevin; Loyd, R. O. Parke; Brown, Alexander; Mason, James P.; et al.; The MUSCLES Treasury Survey. IV. Scaling Relations for Ultraviolet, Ca II K, and Energetic Particle Fluxes from M Dwarfs; IOP Publishing; Astrophysical Journal; 843; 1; 7-2017; 1-51
dc.identifier.issn
0004-637X
dc.identifier.uri
http://hdl.handle.net/11336/67977
dc.description.abstract
Characterizing the UV spectral energy distribution (SED) of an exoplanet host star is critically important for assessing its planet´s potential habitability, particularly for M dwarfs, as they are prime targets for current and near-term exoplanet characterization efforts and atmospheric models predict that their UV radiation can produce photochemistry on habitable zone planets different from that on Earth. To derive ground-based proxies for UV emission for use when Hubble Space Telescope (HST) observations are unavailable, we have assembled a sample of 15 early to mid-M dwarfs observed by HST and compared their nonsimultaneous UV and optical spectra. We find that the equivalent width of the chromospheric Ca ii K line at 3933 Å, when corrected for spectral type, can be used to estimate the stellar surface flux in ultraviolet emission lines, including H i Lyα. In addition, we address another potential driver of habitability: energetic particle fluxes associated with flares. We present a new technique for estimating soft X-ray and >10 MeV proton flux during far-UV emission line flares (Si iv and He ii) by assuming solar-like energy partitions. We analyze several flares from the M4 dwarf GJ 876 observed with HST and Chandra as part of the MUSCLES Treasury Survey and find that habitable zone planets orbiting GJ 876 are impacted by large Carrington-like flares with peak soft X-ray fluxes ≥10-3 W m-2 and possible proton fluxes ∼102-103 pfu, approximately four orders of magnitude more frequently than modern-day Earth.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
IOP Publishing
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Stars: Chromospheres
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Stars: Low-Mass
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Sun: Flares
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
The MUSCLES Treasury Survey. IV. Scaling Relations for Ultraviolet, Ca II K, and Energetic Particle Fluxes from M Dwarfs
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-10-23T18:13:02Z
dc.journal.volume
843
dc.journal.number
1
dc.journal.pagination
1-51
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Youngblood, Allison. University of Colorado; Estados Unidos
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Fil: France, Kevin. University of Colorado; Estados Unidos
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Fil: Loyd, R. O. Parke. University of Colorado; Estados Unidos
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Fil: Brown, Alexander. University of Colorado; Estados Unidos
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Fil: Mason, James P.. University of Colorado; Estados Unidos
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Fil: Schneider, P. Christian. European Space Research And Technology Centre (esa/estec); Alemania
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Fil: Tilley, Matt A.. National Aeronautics and Space Administration; Estados Unidos
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Fil: Berta-Thompson, Zachory K.. University of Colorado; Estados Unidos
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Fil: Buccino, Andrea Paola. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciónes 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
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Fil: Froning, Cynthia S.. University of Texas at Austin; Estados Unidos
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Fil: Hawley, Suzanne L.. University Of Washington, Seattle; Estados Unidos
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Fil: Linsky, Jeffrey. University of Colorado; Estados Unidos
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Fil: Mauas, Pablo Jacobo David. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciónes 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
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Fil: Redfield, Seth. Wesleyan University Middletown; Reino Unido
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Fil: Kowalski, Adam. University of Colorado; Estados Unidos
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Fil: Miguel, Yamila. Observatoire de la Cote D'azur; Francia
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Fil: Newton, Elisabeth R.. Massachusetts Institute of Technology; Estados Unidos
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Fil: Rugheimer, Sarah. University of St. Andrews; Reino Unido
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Fil: Segura, Antígona. National Aeronautics and Space Administration; Estados Unidos. Universidad Nacional Autónoma de México. Instituto de Ciencias Nucleares; México
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Fil: Roberge, Aki. Nasa Goddard Space Flight Center; Estados Unidos
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Fil: Vieytes, Mariela Cristina. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciónes 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.journal.title
Astrophysical Journal
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.3847/1538-4357/aa76dd
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