Possible Association of Two Stellar Bowshocks with Unidentified Fermi Sources

Autores
Sánchez Ayaso, Estrella; Del Valle, María V.; Martí, Josep; Romero, Gustavo Esteban; Luque Escamilla, Pedro L.
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The bowshocks of runaway stars had been theoretically proposed as gamma-ray sources. However, this hypothesis has not been confirmed by observations to date. In this paper, we present two runaway stars (λ Cep and LS 2355) whose bowshocks are coincident with the unidentified Fermi gamma-ray sources 3FLG J2210.1+5925 and 3FGL J1128.7-6232, respectively. After performing a cross-correlation between different catalogs at distinct wavelengths, we found that these bowshocks are the most peculiar objects in the Fermi position ellipses. Then we computed the inverse Compton emission and fitted the Fermi data in order to test the viability of both runaway stars as potential counterparts of the two high-energy sources. We obtained very reasonable values for the fitted parameters of both stars. We also evaluated the possibility for the source 3FGL J1128.7-6232, which is positionally coincident with a H ii region, to be the result of background cosmic-ray protons interacting with the matter of the cloud, as well as the probability of a pure chance association. We conclude that the gamma rays from these Fermi sources might be produced in the bowshocks of the considered runaway stars. In such a case, these would be the first sources of this class ever detected at gamma rays.
Fil: Sánchez Ayaso, Estrella. Universidad de Jaén; España
Fil: Del Valle, María V.. Universitat Potsdam; Alemania
Fil: Martí, Josep. Universidad de Jaén; España
Fil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Luque Escamilla, Pedro L.. Universidad de Jaén; España
Materia
OUTFLOWS
STARS: WINDS
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:11336/82420
Acceder
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spelling Possible Association of Two Stellar Bowshocks with Unidentified Fermi SourcesSánchez Ayaso, EstrellaDel Valle, María V.Martí, JosepRomero, Gustavo EstebanLuque Escamilla, Pedro L.OUTFLOWSSTARS: WINDShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The bowshocks of runaway stars had been theoretically proposed as gamma-ray sources. However, this hypothesis has not been confirmed by observations to date. In this paper, we present two runaway stars (λ Cep and LS 2355) whose bowshocks are coincident with the unidentified Fermi gamma-ray sources 3FLG J2210.1+5925 and 3FGL J1128.7-6232, respectively. After performing a cross-correlation between different catalogs at distinct wavelengths, we found that these bowshocks are the most peculiar objects in the Fermi position ellipses. Then we computed the inverse Compton emission and fitted the Fermi data in order to test the viability of both runaway stars as potential counterparts of the two high-energy sources. We obtained very reasonable values for the fitted parameters of both stars. We also evaluated the possibility for the source 3FGL J1128.7-6232, which is positionally coincident with a H ii region, to be the result of background cosmic-ray protons interacting with the matter of the cloud, as well as the probability of a pure chance association. We conclude that the gamma rays from these Fermi sources might be produced in the bowshocks of the considered runaway stars. In such a case, these would be the first sources of this class ever detected at gamma rays.Fil: Sánchez Ayaso, Estrella. Universidad de Jaén; EspañaFil: Del Valle, María V.. Universitat Potsdam; AlemaniaFil: Martí, Josep. Universidad de Jaén; EspañaFil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Luque Escamilla, Pedro L.. Universidad de Jaén; EspañaIOP Publishing2018-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/82420Sánchez Ayaso, Estrella; Del Valle, María V.; Martí, Josep; Romero, Gustavo Esteban; Luque Escamilla, Pedro L.; Possible Association of Two Stellar Bowshocks with Unidentified Fermi Sources; IOP Publishing; Astrophysical Journal; 861; 1; 7-2018; 1-150004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/aac7c7info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/aac7c7info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:45:54Zoai:ri.conicet.gov.ar:11336/82420instacron: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:34982025-09-03 09:45:54.764CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Possible Association of Two Stellar Bowshocks with Unidentified Fermi Sources
title Possible Association of Two Stellar Bowshocks with Unidentified Fermi Sources
spellingShingle Possible Association of Two Stellar Bowshocks with Unidentified Fermi Sources
Sánchez Ayaso, Estrella
OUTFLOWS
STARS: WINDS
title_short Possible Association of Two Stellar Bowshocks with Unidentified Fermi Sources
title_full Possible Association of Two Stellar Bowshocks with Unidentified Fermi Sources
title_fullStr Possible Association of Two Stellar Bowshocks with Unidentified Fermi Sources
title_full_unstemmed Possible Association of Two Stellar Bowshocks with Unidentified Fermi Sources
title_sort Possible Association of Two Stellar Bowshocks with Unidentified Fermi Sources
dc.creator.none.fl_str_mv Sánchez Ayaso, Estrella
Del Valle, María V.
Martí, Josep
Romero, Gustavo Esteban
Luque Escamilla, Pedro L.
author Sánchez Ayaso, Estrella
author_facet Sánchez Ayaso, Estrella
Del Valle, María V.
Martí, Josep
Romero, Gustavo Esteban
Luque Escamilla, Pedro L.
author_role author
author2 Del Valle, María V.
Martí, Josep
Romero, Gustavo Esteban
Luque Escamilla, Pedro L.
author2_role author
author
author
author
dc.subject.none.fl_str_mv OUTFLOWS
STARS: WINDS
topic OUTFLOWS
STARS: WINDS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The bowshocks of runaway stars had been theoretically proposed as gamma-ray sources. However, this hypothesis has not been confirmed by observations to date. In this paper, we present two runaway stars (λ Cep and LS 2355) whose bowshocks are coincident with the unidentified Fermi gamma-ray sources 3FLG J2210.1+5925 and 3FGL J1128.7-6232, respectively. After performing a cross-correlation between different catalogs at distinct wavelengths, we found that these bowshocks are the most peculiar objects in the Fermi position ellipses. Then we computed the inverse Compton emission and fitted the Fermi data in order to test the viability of both runaway stars as potential counterparts of the two high-energy sources. We obtained very reasonable values for the fitted parameters of both stars. We also evaluated the possibility for the source 3FGL J1128.7-6232, which is positionally coincident with a H ii region, to be the result of background cosmic-ray protons interacting with the matter of the cloud, as well as the probability of a pure chance association. We conclude that the gamma rays from these Fermi sources might be produced in the bowshocks of the considered runaway stars. In such a case, these would be the first sources of this class ever detected at gamma rays.
Fil: Sánchez Ayaso, Estrella. Universidad de Jaén; España
Fil: Del Valle, María V.. Universitat Potsdam; Alemania
Fil: Martí, Josep. Universidad de Jaén; España
Fil: Romero, Gustavo Esteban. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Luque Escamilla, Pedro L.. Universidad de Jaén; España
description The bowshocks of runaway stars had been theoretically proposed as gamma-ray sources. However, this hypothesis has not been confirmed by observations to date. In this paper, we present two runaway stars (λ Cep and LS 2355) whose bowshocks are coincident with the unidentified Fermi gamma-ray sources 3FLG J2210.1+5925 and 3FGL J1128.7-6232, respectively. After performing a cross-correlation between different catalogs at distinct wavelengths, we found that these bowshocks are the most peculiar objects in the Fermi position ellipses. Then we computed the inverse Compton emission and fitted the Fermi data in order to test the viability of both runaway stars as potential counterparts of the two high-energy sources. We obtained very reasonable values for the fitted parameters of both stars. We also evaluated the possibility for the source 3FGL J1128.7-6232, which is positionally coincident with a H ii region, to be the result of background cosmic-ray protons interacting with the matter of the cloud, as well as the probability of a pure chance association. We conclude that the gamma rays from these Fermi sources might be produced in the bowshocks of the considered runaway stars. In such a case, these would be the first sources of this class ever detected at gamma rays.
publishDate 2018
dc.date.none.fl_str_mv 2018-07
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/11336/82420
Sánchez Ayaso, Estrella; Del Valle, María V.; Martí, Josep; Romero, Gustavo Esteban; Luque Escamilla, Pedro L.; Possible Association of Two Stellar Bowshocks with Unidentified Fermi Sources; IOP Publishing; Astrophysical Journal; 861; 1; 7-2018; 1-15
0004-637X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/82420
identifier_str_mv Sánchez Ayaso, Estrella; Del Valle, María V.; Martí, Josep; Romero, Gustavo Esteban; Luque Escamilla, Pedro L.; Possible Association of Two Stellar Bowshocks with Unidentified Fermi Sources; IOP Publishing; Astrophysical Journal; 861; 1; 7-2018; 1-15
0004-637X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/aac7c7
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/aac7c7
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
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
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 13.13397

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