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dc.contributor.author
Rosa, D. A.
dc.contributor.author
Dors Jr., O. L.
dc.contributor.author
Krabbe, A. C.
dc.contributor.author
Hägele, Guillermo Federico
dc.contributor.author
Cardaci, Monica Viviana
dc.contributor.author
Pastoriza, M. G.
dc.contributor.author
Rodrigues, I.
dc.contributor.author
Winge, C.
dc.date.available
2017-01-06T17:20:17Z
dc.date.issued
2014-09
dc.identifier.citation
Rosa, D. A. ; Dors Jr., O. L. ; Krabbe, A. C. ; Hägele, Guillermo Federico; Cardaci, Monica Viviana; et al.; Interaction effects on galaxy pairs with Gemini/GMOS - II: oxygen abundance gradients; Wiley; Monthly Notices Of The Royal Astronomical Society; 444; 3; 9-2014; 2005-2021
dc.identifier.issn
0035-8711
dc.identifier.uri
http://hdl.handle.net/11336/10918
dc.description.abstract
In this paper, we derive oxygen abundance gradients from HII regions located in 11 galaxies in eight systems of close pairs. Long-slit spectra in the range 4400?7300 Å were obtained with the Gemini Multi-Object Spectrograph at Gemini South (GMOS-S). Spatial profiles of oxygen abundance in the gaseous phase along galaxy discs were obtained using calibrations based on strong emission lines (N2 and O3N2).We found oxygen gradients to be significantly flatter for all the studied galaxies than those in typical isolated spiral galaxies. Four objects in our sample, AM 1219A, AM 1256B, AM 2030A and AM 2030B, show a clear break in the oxygen abundance at galactocentric radius R/R25 between 0.2 and 0.5. For AM 1219A and AM 1256B, we found negative slopes for the inner gradients, and for AM 2030B, we found a positive slope. All three cases show a flatter behaviour to the outskirts of the galaxies. For AM 2030A, we found a positive slope for the outer gradient, while the inner gradient is almost compatible with a flat behaviour. We found a decrease of star formation efficiency in the zone that corresponds to the oxygen abundance gradient break for AM 1219A and AM 2030B. For the former, a minimum in the estimated metallicities was found very close to the break zone, which could be associated with a corotation radius. However, AM 1256B and AM 2030A, present a star formation rate maximum but not an extreme oxygen abundance value. All four interacting systems that show oxygen gradient breaks have extreme SFR values located very close to break zones.The HII regions located in close pairs of galaxies follow the same relation between the ionization parameter and the oxygen abundance as those regions in isolated galaxies.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Imaging Spectroscopy
dc.subject
Interstellar Abundances
dc.subject
Interstellar Medium
dc.subject.classification
Astronomía
dc.subject.classification
Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Interaction effects on galaxy pairs with Gemini/GMOS - II: oxygen abundance gradients
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-01-02T18:36:45Z
dc.journal.volume
444
dc.journal.number
3
dc.journal.pagination
2005-2021
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Rosa, D. A. . Universidade Do Vale Do Paraiba; Brasil
dc.description.fil
Fil: Dors Jr., O. L. . Universidade Do Vale Do Paraiba; Brasil
dc.description.fil
Fil: Krabbe, A. C. . Universidade Do Vale Do Paraiba; Brasil
dc.description.fil
Fil: Hägele, Guillermo Federico. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Astrofísica de La Plata; Argentina
dc.description.fil
Fil: Cardaci, Monica Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Astrofísica de la Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
dc.description.fil
Fil: Pastoriza, M. G.. Universidade Federal do Rio Grande do Sul; Brasil
dc.description.fil
Fil: Rodrigues, I.. Universidade Do Vale Do Paraiba; Brasil
dc.description.fil
Fil: Winge, C.. Gemini Observatory; Chile
dc.journal.title
Monthly Notices Of The Royal Astronomical Society
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/mnras/stu1578
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://mnras.oxfordjournals.org/content/444/3/2005


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