The UV surface habitability of Proxima b: first experiments revealing probable life survival to stellar flares

Autores
Abrevaya, Ximena Celeste; Leitzinger, M.; Oppezzo, O. J.; Odert, P.; Patel, M. R.; Luna, Gerardo Juan Manuel; Forte Giacobone, A. F.; Hanslmeier, A.
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We use a new interdisciplinary approach to study the UV surface habitability of Proxima b under quiescent and flaring stellar conditions. We assumed planetary atmospheric compositions based on CO2 and N2 and surface pressures from 100 to 5000 mbar. Our results show that the combination of these atmospheric compositions and pressures provide enough shielding from the most damaging UV wavelengths, expanding the 'UV-protective' planetary atmospheric compositions beyond ozone. Additionally, we show that the UV radiation reaching the surface of Proxima b during quiescent conditions would be negligible from the biological point of view, even without an atmosphere. Given that high UV fluxes could challenge the existence of life, then, we experimentally tested the effect that flares would have on microorganisms in a 'worst case scenario' (no UV-shielding). Our results show the impact that a typical flare and a superflare would have on life: when microorganisms receive very high fluences of UVC, such as those expected to reach the surface of Proxima b after a typical flare or a superflare, a fraction of the population is able to survive. Our study suggests that life could cope with highly UV irradiated environments in exoplanets under conditions that cannot be found on Earth.
Fil: Abrevaya, Ximena Celeste. 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
Fil: Leitzinger, M.. University of Graz; Austria
Fil: Oppezzo, O. J.. Comisión Nacional de Energía Atómica; Argentina
Fil: Odert, P.. University of Graz; Austria
Fil: Patel, M. R.. The Open University (ou); Reino Unido
Fil: Luna, Gerardo Juan Manuel. 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
Fil: Forte Giacobone, A. F.. Comisión Nacional de Energía Atómica; Argentina
Fil: Hanslmeier, A.. University of Graz; Austria
Materia
ASTROBIOLOGY
PLANETS AND SATELLITES: SURFACES
STARS: ACTIVITY
STARS: FLARE
ULTRAVIOLET: STARS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/208167
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/208167
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The UV surface habitability of Proxima b: first experiments revealing probable life survival to stellar flaresAbrevaya, Ximena CelesteLeitzinger, M.Oppezzo, O. J.Odert, P.Patel, M. R.Luna, Gerardo Juan ManuelForte Giacobone, A. F.Hanslmeier, A.ASTROBIOLOGYPLANETS AND SATELLITES: SURFACESSTARS: ACTIVITYSTARS: FLAREULTRAVIOLET: STARShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1https://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1We use a new interdisciplinary approach to study the UV surface habitability of Proxima b under quiescent and flaring stellar conditions. We assumed planetary atmospheric compositions based on CO2 and N2 and surface pressures from 100 to 5000 mbar. Our results show that the combination of these atmospheric compositions and pressures provide enough shielding from the most damaging UV wavelengths, expanding the 'UV-protective' planetary atmospheric compositions beyond ozone. Additionally, we show that the UV radiation reaching the surface of Proxima b during quiescent conditions would be negligible from the biological point of view, even without an atmosphere. Given that high UV fluxes could challenge the existence of life, then, we experimentally tested the effect that flares would have on microorganisms in a 'worst case scenario' (no UV-shielding). Our results show the impact that a typical flare and a superflare would have on life: when microorganisms receive very high fluences of UVC, such as those expected to reach the surface of Proxima b after a typical flare or a superflare, a fraction of the population is able to survive. Our study suggests that life could cope with highly UV irradiated environments in exoplanets under conditions that cannot be found on Earth.Fil: Abrevaya, Ximena Celeste. 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; ArgentinaFil: Leitzinger, M.. University of Graz; AustriaFil: Oppezzo, O. J.. Comisión Nacional de Energía Atómica; ArgentinaFil: Odert, P.. University of Graz; AustriaFil: Patel, M. R.. The Open University (ou); Reino UnidoFil: Luna, Gerardo Juan Manuel. 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; ArgentinaFil: Forte Giacobone, A. F.. Comisión Nacional de Energía Atómica; ArgentinaFil: Hanslmeier, A.. University of Graz; AustriaOxford University Press2020-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/208167Abrevaya, Ximena Celeste; Leitzinger, M.; Oppezzo, O. J.; Odert, P.; Patel, M. R.; et al.; The UV surface habitability of Proxima b: first experiments revealing probable life survival to stellar flares; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 494; 1; 2-2020; 69-741745-39251745-3933CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnrasl/advance-article/doi/10.1093/mnrasl/slaa037/5762693info:eu-repo/semantics/altIdentifier/doi/10.1093/mnrasl/slaa037info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:43:13Zoai:ri.conicet.gov.ar:11336/208167instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:43:13.644CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The UV surface habitability of Proxima b: first experiments revealing probable life survival to stellar flares
title The UV surface habitability of Proxima b: first experiments revealing probable life survival to stellar flares
spellingShingle The UV surface habitability of Proxima b: first experiments revealing probable life survival to stellar flares
Abrevaya, Ximena Celeste
ASTROBIOLOGY
PLANETS AND SATELLITES: SURFACES
STARS: ACTIVITY
STARS: FLARE
ULTRAVIOLET: STARS
title_short The UV surface habitability of Proxima b: first experiments revealing probable life survival to stellar flares
title_full The UV surface habitability of Proxima b: first experiments revealing probable life survival to stellar flares
title_fullStr The UV surface habitability of Proxima b: first experiments revealing probable life survival to stellar flares
title_full_unstemmed The UV surface habitability of Proxima b: first experiments revealing probable life survival to stellar flares
title_sort The UV surface habitability of Proxima b: first experiments revealing probable life survival to stellar flares
dc.creator.none.fl_str_mv Abrevaya, Ximena Celeste
Leitzinger, M.
Oppezzo, O. J.
Odert, P.
Patel, M. R.
Luna, Gerardo Juan Manuel
Forte Giacobone, A. F.
Hanslmeier, A.
author Abrevaya, Ximena Celeste
author_facet Abrevaya, Ximena Celeste
Leitzinger, M.
Oppezzo, O. J.
Odert, P.
Patel, M. R.
Luna, Gerardo Juan Manuel
Forte Giacobone, A. F.
Hanslmeier, A.
author_role author
author2 Leitzinger, M.
Oppezzo, O. J.
Odert, P.
Patel, M. R.
Luna, Gerardo Juan Manuel
Forte Giacobone, A. F.
Hanslmeier, A.
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv ASTROBIOLOGY
PLANETS AND SATELLITES: SURFACES
STARS: ACTIVITY
STARS: FLARE
ULTRAVIOLET: STARS
topic ASTROBIOLOGY
PLANETS AND SATELLITES: SURFACES
STARS: ACTIVITY
STARS: FLARE
ULTRAVIOLET: STARS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We use a new interdisciplinary approach to study the UV surface habitability of Proxima b under quiescent and flaring stellar conditions. We assumed planetary atmospheric compositions based on CO2 and N2 and surface pressures from 100 to 5000 mbar. Our results show that the combination of these atmospheric compositions and pressures provide enough shielding from the most damaging UV wavelengths, expanding the 'UV-protective' planetary atmospheric compositions beyond ozone. Additionally, we show that the UV radiation reaching the surface of Proxima b during quiescent conditions would be negligible from the biological point of view, even without an atmosphere. Given that high UV fluxes could challenge the existence of life, then, we experimentally tested the effect that flares would have on microorganisms in a 'worst case scenario' (no UV-shielding). Our results show the impact that a typical flare and a superflare would have on life: when microorganisms receive very high fluences of UVC, such as those expected to reach the surface of Proxima b after a typical flare or a superflare, a fraction of the population is able to survive. Our study suggests that life could cope with highly UV irradiated environments in exoplanets under conditions that cannot be found on Earth.
Fil: Abrevaya, Ximena Celeste. 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
Fil: Leitzinger, M.. University of Graz; Austria
Fil: Oppezzo, O. J.. Comisión Nacional de Energía Atómica; Argentina
Fil: Odert, P.. University of Graz; Austria
Fil: Patel, M. R.. The Open University (ou); Reino Unido
Fil: Luna, Gerardo Juan Manuel. 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
Fil: Forte Giacobone, A. F.. Comisión Nacional de Energía Atómica; Argentina
Fil: Hanslmeier, A.. University of Graz; Austria
description We use a new interdisciplinary approach to study the UV surface habitability of Proxima b under quiescent and flaring stellar conditions. We assumed planetary atmospheric compositions based on CO2 and N2 and surface pressures from 100 to 5000 mbar. Our results show that the combination of these atmospheric compositions and pressures provide enough shielding from the most damaging UV wavelengths, expanding the 'UV-protective' planetary atmospheric compositions beyond ozone. Additionally, we show that the UV radiation reaching the surface of Proxima b during quiescent conditions would be negligible from the biological point of view, even without an atmosphere. Given that high UV fluxes could challenge the existence of life, then, we experimentally tested the effect that flares would have on microorganisms in a 'worst case scenario' (no UV-shielding). Our results show the impact that a typical flare and a superflare would have on life: when microorganisms receive very high fluences of UVC, such as those expected to reach the surface of Proxima b after a typical flare or a superflare, a fraction of the population is able to survive. Our study suggests that life could cope with highly UV irradiated environments in exoplanets under conditions that cannot be found on Earth.
publishDate 2020
dc.date.none.fl_str_mv 2020-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/208167
Abrevaya, Ximena Celeste; Leitzinger, M.; Oppezzo, O. J.; Odert, P.; Patel, M. R.; et al.; The UV surface habitability of Proxima b: first experiments revealing probable life survival to stellar flares; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 494; 1; 2-2020; 69-74
1745-3925
1745-3933
CONICET Digital
CONICET
url http://hdl.handle.net/11336/208167
identifier_str_mv Abrevaya, Ximena Celeste; Leitzinger, M.; Oppezzo, O. J.; Odert, P.; Patel, M. R.; et al.; The UV surface habitability of Proxima b: first experiments revealing probable life survival to stellar flares; Oxford University Press; Monthly Notices of the Royal Astronomical Society; 494; 1; 2-2020; 69-74
1745-3925
1745-3933
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnrasl/advance-article/doi/10.1093/mnrasl/slaa037/5762693
info:eu-repo/semantics/altIdentifier/doi/10.1093/mnrasl/slaa037
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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