Star Formation in Satellite Galaxies

Autores
Guitérrez, C. M.; Alonso Giraldes, Maria Sol; Funes, Jose Gabriel; Ribeiro, M. B.
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We present narrowband observations of the Hα emission in a sample of 31 satellites orbiting isolated giant spiral galaxies. The sample studied spans the range -19 mag < MB < -15 mag. Hα emission was detected in all the spiral and irregular objects with fluxes in the range × 10-14 ergs cm-2 s-1. The average and maximum values for the current star formation rates are 0.68 and 3.66 M⊙ yr-1, respectively. Maps of the spatial distribution of ionized gas are presented. The star-forming regions show a rich structure in which frequently discrete complexes are imposed over more diffuse structures. In general, the current star formation rates are smaller than the mean values in the past, obtained from the stellar content; this probably indicates a declining rate with time in the generation of new stars. However, the reserve of gas is enough to continue fueling the current levels of star formation activity for at least another Hubble time. Four of the objects (NGC 2718b, NGC 4541e, and NGC 5965a1 and NGC 5965a2) with higher current star formation rates show clear signs of interaction with close companions of comparable brightness at projected distances of 25, 20, and 2 kpc, respectively. The only two galaxies in our sample that do not show star formation activity are members of these interacting systems, and it is unclear if this is a consequence of intrinsic properties (both are early Hubble types) or if it is related to possible disruption of the external parts due to the interaction. In the case of the pair NGC 2718a-2718b there are indications of gas transport between the galaxies.
Fil: Guitérrez, C. M.. Instituto Astrofísico de Canarias; España
Fil: Alonso Giraldes, Maria Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "el Leoncito". Casleo Sede San Juan | Universidad Nacional de San Juan. Complejo Astronómico "el Leoncito". Casleo Sede San Juan | Universidad Nacional de la Plata. Complejo Astronómico "el Leoncito". Casleo Sede San Juan | Universidad Nacional de Córdoba. Complejo Astronómico "el Leoncito". Casleo Sede San Juan; Argentina
Fil: Funes, Jose Gabriel. University of Arizona; Estados Unidos
Fil: Ribeiro, M. B.. Universidade Federal do Rio de Janeiro; Brasil
Materia
GALAXIES
SATELLITES
STAR
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:11336/252181

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spelling Star Formation in Satellite GalaxiesGuitérrez, C. M.Alonso Giraldes, Maria SolFunes, Jose GabrielRibeiro, M. B.GALAXIESSATELLITESSTARhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We present narrowband observations of the Hα emission in a sample of 31 satellites orbiting isolated giant spiral galaxies. The sample studied spans the range -19 mag < MB < -15 mag. Hα emission was detected in all the spiral and irregular objects with fluxes in the range × 10-14 ergs cm-2 s-1. The average and maximum values for the current star formation rates are 0.68 and 3.66 M⊙ yr-1, respectively. Maps of the spatial distribution of ionized gas are presented. The star-forming regions show a rich structure in which frequently discrete complexes are imposed over more diffuse structures. In general, the current star formation rates are smaller than the mean values in the past, obtained from the stellar content; this probably indicates a declining rate with time in the generation of new stars. However, the reserve of gas is enough to continue fueling the current levels of star formation activity for at least another Hubble time. Four of the objects (NGC 2718b, NGC 4541e, and NGC 5965a1 and NGC 5965a2) with higher current star formation rates show clear signs of interaction with close companions of comparable brightness at projected distances of 25, 20, and 2 kpc, respectively. The only two galaxies in our sample that do not show star formation activity are members of these interacting systems, and it is unclear if this is a consequence of intrinsic properties (both are early Hubble types) or if it is related to possible disruption of the external parts due to the interaction. In the case of the pair NGC 2718a-2718b there are indications of gas transport between the galaxies.Fil: Guitérrez, C. M.. Instituto Astrofísico de Canarias; EspañaFil: Alonso Giraldes, Maria Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "el Leoncito". Casleo Sede San Juan | Universidad Nacional de San Juan. Complejo Astronómico "el Leoncito". Casleo Sede San Juan | Universidad Nacional de la Plata. Complejo Astronómico "el Leoncito". Casleo Sede San Juan | Universidad Nacional de Córdoba. Complejo Astronómico "el Leoncito". Casleo Sede San Juan; ArgentinaFil: Funes, Jose Gabriel. University of Arizona; Estados UnidosFil: Ribeiro, M. B.. Universidade Federal do Rio de Janeiro; BrasilIOP Publishing2006-08info: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/11336/252181Guitérrez, C. M.; Alonso Giraldes, Maria Sol; Funes, Jose Gabriel; Ribeiro, M. B.; Star Formation in Satellite Galaxies; IOP Publishing; Astronomical Journal; 132; 2; 8-2006; 596-6070004-6256CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.1086/504591info:eu-repo/semantics/altIdentifier/doi/10.1086/504591info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:41:10Zoai:ri.conicet.gov.ar:11336/252181instacron: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 09:41:10.84CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Star Formation in Satellite Galaxies
title Star Formation in Satellite Galaxies
spellingShingle Star Formation in Satellite Galaxies
Guitérrez, C. M.
GALAXIES
SATELLITES
STAR
title_short Star Formation in Satellite Galaxies
title_full Star Formation in Satellite Galaxies
title_fullStr Star Formation in Satellite Galaxies
title_full_unstemmed Star Formation in Satellite Galaxies
title_sort Star Formation in Satellite Galaxies
dc.creator.none.fl_str_mv Guitérrez, C. M.
Alonso Giraldes, Maria Sol
Funes, Jose Gabriel
Ribeiro, M. B.
author Guitérrez, C. M.
author_facet Guitérrez, C. M.
Alonso Giraldes, Maria Sol
Funes, Jose Gabriel
Ribeiro, M. B.
author_role author
author2 Alonso Giraldes, Maria Sol
Funes, Jose Gabriel
Ribeiro, M. B.
author2_role author
author
author
dc.subject.none.fl_str_mv GALAXIES
SATELLITES
STAR
topic GALAXIES
SATELLITES
STAR
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We present narrowband observations of the Hα emission in a sample of 31 satellites orbiting isolated giant spiral galaxies. The sample studied spans the range -19 mag < MB < -15 mag. Hα emission was detected in all the spiral and irregular objects with fluxes in the range × 10-14 ergs cm-2 s-1. The average and maximum values for the current star formation rates are 0.68 and 3.66 M⊙ yr-1, respectively. Maps of the spatial distribution of ionized gas are presented. The star-forming regions show a rich structure in which frequently discrete complexes are imposed over more diffuse structures. In general, the current star formation rates are smaller than the mean values in the past, obtained from the stellar content; this probably indicates a declining rate with time in the generation of new stars. However, the reserve of gas is enough to continue fueling the current levels of star formation activity for at least another Hubble time. Four of the objects (NGC 2718b, NGC 4541e, and NGC 5965a1 and NGC 5965a2) with higher current star formation rates show clear signs of interaction with close companions of comparable brightness at projected distances of 25, 20, and 2 kpc, respectively. The only two galaxies in our sample that do not show star formation activity are members of these interacting systems, and it is unclear if this is a consequence of intrinsic properties (both are early Hubble types) or if it is related to possible disruption of the external parts due to the interaction. In the case of the pair NGC 2718a-2718b there are indications of gas transport between the galaxies.
Fil: Guitérrez, C. M.. Instituto Astrofísico de Canarias; España
Fil: Alonso Giraldes, Maria Sol. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "el Leoncito". Casleo Sede San Juan | Universidad Nacional de San Juan. Complejo Astronómico "el Leoncito". Casleo Sede San Juan | Universidad Nacional de la Plata. Complejo Astronómico "el Leoncito". Casleo Sede San Juan | Universidad Nacional de Córdoba. Complejo Astronómico "el Leoncito". Casleo Sede San Juan; Argentina
Fil: Funes, Jose Gabriel. University of Arizona; Estados Unidos
Fil: Ribeiro, M. B.. Universidade Federal do Rio de Janeiro; Brasil
description We present narrowband observations of the Hα emission in a sample of 31 satellites orbiting isolated giant spiral galaxies. The sample studied spans the range -19 mag < MB < -15 mag. Hα emission was detected in all the spiral and irregular objects with fluxes in the range × 10-14 ergs cm-2 s-1. The average and maximum values for the current star formation rates are 0.68 and 3.66 M⊙ yr-1, respectively. Maps of the spatial distribution of ionized gas are presented. The star-forming regions show a rich structure in which frequently discrete complexes are imposed over more diffuse structures. In general, the current star formation rates are smaller than the mean values in the past, obtained from the stellar content; this probably indicates a declining rate with time in the generation of new stars. However, the reserve of gas is enough to continue fueling the current levels of star formation activity for at least another Hubble time. Four of the objects (NGC 2718b, NGC 4541e, and NGC 5965a1 and NGC 5965a2) with higher current star formation rates show clear signs of interaction with close companions of comparable brightness at projected distances of 25, 20, and 2 kpc, respectively. The only two galaxies in our sample that do not show star formation activity are members of these interacting systems, and it is unclear if this is a consequence of intrinsic properties (both are early Hubble types) or if it is related to possible disruption of the external parts due to the interaction. In the case of the pair NGC 2718a-2718b there are indications of gas transport between the galaxies.
publishDate 2006
dc.date.none.fl_str_mv 2006-08
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/11336/252181
Guitérrez, C. M.; Alonso Giraldes, Maria Sol; Funes, Jose Gabriel; Ribeiro, M. B.; Star Formation in Satellite Galaxies; IOP Publishing; Astronomical Journal; 132; 2; 8-2006; 596-607
0004-6256
CONICET Digital
CONICET
url http://hdl.handle.net/11336/252181
identifier_str_mv Guitérrez, C. M.; Alonso Giraldes, Maria Sol; Funes, Jose Gabriel; Ribeiro, M. B.; Star Formation in Satellite Galaxies; IOP Publishing; Astronomical Journal; 132; 2; 8-2006; 596-607
0004-6256
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://iopscience.iop.org/article/10.1086/504591
info:eu-repo/semantics/altIdentifier/doi/10.1086/504591
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 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)
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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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