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dc.contributor.author Smith Castelli, Analia Viviana
dc.contributor.author Faifer, Favio Raúl
dc.contributor.author Escudero, Carlos Gabriel
dc.date.available 2018-02-15T14:41:42Z
dc.date.issued 2016-10
dc.identifier.citation Smith Castelli, Analia Viviana; Faifer, Favio Raúl; Escudero, Carlos Gabriel; Stellar systems in the direction of the Hickson Compact Group 44, I : low surface brightness galaxies; EDP Sciences; Astronomy and Astrophysics; 596; 23; 10-2016; 1-8
dc.identifier.issn 0004-6361
dc.identifier.uri http://hdl.handle.net/11336/36515
dc.description.abstract Context. In spite of the numerous studies of low-luminosity galaxies in different environments, there is still no consensus about their formation scenario. In particular, a large number of galaxies displaying extremely low-surface brightnesses have been detected in the last year, and the nature of these objects is under discussion. Aims. In this paper we report the detection of two extended low-surface brightness (LSB) objects (µeffg 0 ' 27 mag) found, in projection, next to NGC 3193 and in the zone of the Hickson Compact Group (HCG) 44, respectively. Methods. We analyzed deep, high-quality, GEMINI-GMOS images with ELLIPSE within IRAF in order to obtain their brightness profiles and structural parameters. We also searched for the presence of globular clusters (GC) in these fields. Results. We have found that, if these LSB galaxies were at the distances of NGC 3193 and HCG 44, they would show sizes and luminosities similar to those of the ultra-diffuse galaxies (UDGs) found in the Coma cluster and other associations. In that case, their sizes would be rather larger than those displayed by the Local Group dwarf spheroidal (dSph) galaxies. We have detected a few unresolved sources in the sky zone occupied by these galaxies showing colors and brightnesses typical of blue globular clusters. Conclusions. From the comparison of the properties of the galaxies presented in this work with those of similar objects reported in the literature, we have found that LSB galaxies display sizes covering a quite extended continous range (reff ∼ 0.3−4.5 kpc), in contrast to “normal” early-type galaxies, which show reff ∼ 1.0 kpc with a low dispersion. This fact might point to different formation processes for both types of galaxies.
dc.format application/pdf
dc.language.iso eng
dc.publisher EDP Sciences
dc.rights info:eu-repo/semantics/openAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject Photometry
dc.subject Galaxy groups
dc.subject Star clusters
dc.subject Dwarf galaxies
dc.subject HCG 44 (galaxia)
dc.subject.classification Astronomía
dc.subject.classification Ciencias Físicas
dc.subject.classification CIENCIAS NATURALES Y EXACTAS
dc.title Stellar systems in the direction of the Hickson Compact Group 44, I : low surface brightness galaxies
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2018-02-07T17:03:32Z
dc.journal.volume 596
dc.journal.number 23
dc.journal.pagination 1-8
dc.journal.pais Francia
dc.journal.ciudad Paris
dc.description.fil Fil: Smith Castelli, Analia Viviana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica la Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
dc.description.fil Fil: Faifer, Favio Raúl. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica la Plata; Argentina
dc.description.fil Fil: Escudero, Carlos Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica la Plata; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
dc.journal.title Astronomy and Astrophysics
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/http://adsabs.harvard.edu/abs/2016arXiv160900224S
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/201628969
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)