EvryFlare. III. Temperature Evolution and Habitability Impacts of Dozens of Superflares Observed Simultaneously by Evryscope and TESS
Superflares may provide the dominant source of biologically relevant UV radiation to rocky habitable-zone M-dwarf planets (M-Earths), altering planetary atmospheres and conditions for surface life. The combined line and continuum flare emission has usually been approximated by a 9000 K blackbody. If...
| Autores: | , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/207398 |
| Acceso en línea: | https://hdl.handle.net/2445/207398 |
| Access Level: | acceso abierto |
| Palabra clave: | Observatoris Planetes Telescopis Observatories Planets Telescopes |
| id |
ES_25512660fd5f6bbeabc5afafd542e1d6 |
|---|---|
| oai_identifier_str |
oai:recercat.cat:2445/207398 |
| network_acronym_str |
ES |
| network_name_str |
España |
| repository_id_str |
|
| spelling |
EvryFlare. III. Temperature Evolution and Habitability Impacts of Dozens of Superflares Observed Simultaneously by Evryscope and TESSHoward, Ward S.Corbett, HankLaw, Nicholas M.Ratzloff, Jeffrey K.Galliher, NathanGlazier, Amy L.Gonzalez, RamsesVasquez Soto, AlanFors Aldrich, OctaviSer Badia, Daniel delHaislip, JoshuaObservatorisPlanetesTelescopisObservatoriesPlanetsTelescopesSuperflares may provide the dominant source of biologically relevant UV radiation to rocky habitable-zone M-dwarf planets (M-Earths), altering planetary atmospheres and conditions for surface life. The combined line and continuum flare emission has usually been approximated by a 9000 K blackbody. If superflares are hotter, then the UV emission may be 10 times higher than predicted from the optical. However, it is unknown for how long M-dwarf superflares reach temperatures above 9000 K. Only a handful of M-dwarf superflares have been recorded with multiwavelength high-cadence observations. We double the total number of events in the literature using simultaneous Evryscope and Transiting Exoplanet Survey Satellite observations to provide the first systematic exploration of the temperature evolution of M-dwarf superflares. We also increase the number of superflaring M dwarfs with published time-resolved blackbody evolution by ∼10×. We measure temperatures at 2 minutes cadence for 42 superflares from 27 K5–M5 dwarfs. We find superflare peak temperatures (defined as the mean of temperatures corresponding to flare FWHM) increase with flare energy and impulse. We find the amount of time flares emit at temperatures above 14,000 K depends on energy. We discover that 43% of the flares emit above 14,000 K, 23% emit above 20,000 K and 5% emit above 30,000 K. The largest and hottest flare briefly reached 42,000 K. Some do not reach 14,000 K. During superflares, we estimate M-Earths orbiting <200 Myr stars typically receive a top-of-atmosphere UV-C flux of ∼120 W m−2 and up to 103 W m−2, 100–1000 times the time-averaged X-ray and UV flux from Proxima Cen.Institute of Physics (IOP)2024202420202024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion1 p.application/pdfhttps://hdl.handle.net/2445/207398Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.3847/1538-4357/abb5b4Astrophysical Journal, 2020, vol. 902, num.2https://doi.org/10.3847/1538-4357/abb5b4(c) American Astronomical Society, 2020info:eu-repo/semantics/openAccessoai:recercat.cat:2445/2073982026-05-29T05:05:01Z |
| dc.title.none.fl_str_mv |
EvryFlare. III. Temperature Evolution and Habitability Impacts of Dozens of Superflares Observed Simultaneously by Evryscope and TESS |
| title |
EvryFlare. III. Temperature Evolution and Habitability Impacts of Dozens of Superflares Observed Simultaneously by Evryscope and TESS |
| spellingShingle |
EvryFlare. III. Temperature Evolution and Habitability Impacts of Dozens of Superflares Observed Simultaneously by Evryscope and TESS Howard, Ward S. Observatoris Planetes Telescopis Observatories Planets Telescopes |
| title_short |
EvryFlare. III. Temperature Evolution and Habitability Impacts of Dozens of Superflares Observed Simultaneously by Evryscope and TESS |
| title_full |
EvryFlare. III. Temperature Evolution and Habitability Impacts of Dozens of Superflares Observed Simultaneously by Evryscope and TESS |
| title_fullStr |
EvryFlare. III. Temperature Evolution and Habitability Impacts of Dozens of Superflares Observed Simultaneously by Evryscope and TESS |
| title_full_unstemmed |
EvryFlare. III. Temperature Evolution and Habitability Impacts of Dozens of Superflares Observed Simultaneously by Evryscope and TESS |
| title_sort |
EvryFlare. III. Temperature Evolution and Habitability Impacts of Dozens of Superflares Observed Simultaneously by Evryscope and TESS |
| dc.creator.none.fl_str_mv |
Howard, Ward S. Corbett, Hank Law, Nicholas M. Ratzloff, Jeffrey K. Galliher, Nathan Glazier, Amy L. Gonzalez, Ramses Vasquez Soto, Alan Fors Aldrich, Octavi Ser Badia, Daniel del Haislip, Joshua |
| author |
Howard, Ward S. |
| author_facet |
Howard, Ward S. Corbett, Hank Law, Nicholas M. Ratzloff, Jeffrey K. Galliher, Nathan Glazier, Amy L. Gonzalez, Ramses Vasquez Soto, Alan Fors Aldrich, Octavi Ser Badia, Daniel del Haislip, Joshua |
| author_role |
author |
| author2 |
Corbett, Hank Law, Nicholas M. Ratzloff, Jeffrey K. Galliher, Nathan Glazier, Amy L. Gonzalez, Ramses Vasquez Soto, Alan Fors Aldrich, Octavi Ser Badia, Daniel del Haislip, Joshua |
| author2_role |
author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
Observatoris Planetes Telescopis Observatories Planets Telescopes |
| topic |
Observatoris Planetes Telescopis Observatories Planets Telescopes |
| description |
Superflares may provide the dominant source of biologically relevant UV radiation to rocky habitable-zone M-dwarf planets (M-Earths), altering planetary atmospheres and conditions for surface life. The combined line and continuum flare emission has usually been approximated by a 9000 K blackbody. If superflares are hotter, then the UV emission may be 10 times higher than predicted from the optical. However, it is unknown for how long M-dwarf superflares reach temperatures above 9000 K. Only a handful of M-dwarf superflares have been recorded with multiwavelength high-cadence observations. We double the total number of events in the literature using simultaneous Evryscope and Transiting Exoplanet Survey Satellite observations to provide the first systematic exploration of the temperature evolution of M-dwarf superflares. We also increase the number of superflaring M dwarfs with published time-resolved blackbody evolution by ∼10×. We measure temperatures at 2 minutes cadence for 42 superflares from 27 K5–M5 dwarfs. We find superflare peak temperatures (defined as the mean of temperatures corresponding to flare FWHM) increase with flare energy and impulse. We find the amount of time flares emit at temperatures above 14,000 K depends on energy. We discover that 43% of the flares emit above 14,000 K, 23% emit above 20,000 K and 5% emit above 30,000 K. The largest and hottest flare briefly reached 42,000 K. Some do not reach 14,000 K. During superflares, we estimate M-Earths orbiting <200 Myr stars typically receive a top-of-atmosphere UV-C flux of ∼120 W m−2 and up to 103 W m−2, 100–1000 times the time-averaged X-ray and UV flux from Proxima Cen. |
| publishDate |
2020 |
| dc.date.none.fl_str_mv |
2020 2024 2024 2024 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/207398 |
| url |
https://hdl.handle.net/2445/207398 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Reproducció del document publicat a: https://doi.org/10.3847/1538-4357/abb5b4 Astrophysical Journal, 2020, vol. 902, num.2 https://doi.org/10.3847/1538-4357/abb5b4 |
| dc.rights.none.fl_str_mv |
(c) American Astronomical Society, 2020 info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
(c) American Astronomical Society, 2020 |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
1 p. application/pdf |
| dc.publisher.none.fl_str_mv |
Institute of Physics (IOP) |
| publisher.none.fl_str_mv |
Institute of Physics (IOP) |
| dc.source.none.fl_str_mv |
Articles publicats en revistes (Física Quàntica i Astrofísica) reponame:Recercat. Dipósit de la Recerca de Catalunya instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| instname_str |
Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| reponame_str |
Recercat. Dipósit de la Recerca de Catalunya |
| collection |
Recercat. Dipósit de la Recerca de Catalunya |
| repository.name.fl_str_mv |
|
| repository.mail.fl_str_mv |
|
| _version_ |
1869404749876428800 |
| score |
15,811543 |