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
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/252181
Ver los metadatos del registro completo
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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 Técnicas2025-10-15T14:31:03Zoai: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:34982025-10-15 14:31:03.83CONICET 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 |
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2006-08 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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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 |
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eng |
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IOP Publishing |
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