Early-type galaxies in the Antlia cluster: Catalogue and isophotal analysis

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dc.contributor.authorCalderón, J.P.
dc.contributor.authorBassino, L.P.
dc.contributor.authorCellone, S.A.
dc.contributor.authorGómez, M.
dc.date.accessioned2019-05-28T16:18:27Z
dc.date.available2019-05-28T16:18:27Z
dc.date.issued2018-06
dc.descriptionIndexación: Scopus.es_ES
dc.descriptionWe thank an anonymous referee for constructive remarks. This work was funded by grants from Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina, Agencia Nacional de Promoción Científica y Tecnológica, and Universidad Nacional de La Plata (Argentina). JPC and LPB are grateful to the Departamento de Astronomía de la Universidad de Concepción (Chile) for financial support and warm hospitality during part of this research. MG acknowledges support from FONDECYT Regular Grant No. 1170121. LPB and MG: Visiting astronomers, Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatories, which are operated by the Association of Universities for Research in Astronomy, under contract with the National Science Foundation.
dc.description.abstractWe present a statistical isophotal analysis of 138 early-type galaxies in the Antlia cluster, located at a distance of ~35 Mpc. The observational material consists of CCD images of four 36 ×36 arcmin2 fields obtained with theMOSAIC II camera at the Blanco 4-m telescope at Cerro Tololo Interamerican Observatory. Our present work supersedes previous Antlia studies in the sense that the covered area is four times larger, the limiting magnitude is MB ~ -9.6 mag, and the surface photometry parameters of each galaxy are derived from Sérsic model fits extrapolated to infinity. In a companion previous study we focused on the scaling relations obtained by means of surface photometry, and now we present the data, on which the previous paper is based, the parameters of the isophotal fits as well as an isophotal analysis. For each galaxy, we derive isophotal shape parameters along the semimajor axis and search for correlations within different radial bins. Through extensive statistical tests, we also analyse the behaviour of these values against photometric and global parameters of the galaxies themselves. While some galaxies do display radial gradients in their ellipticity (∈) and/or their Fourier coefficients, differences in mean values between adjacent regions are not statistically significant. Regarding Fourier coefficients, dwarf galaxies usually display gradients between all adjacent regions, while non-dwarfs tend to show this behaviour just between the two outermost regions. Globally, there is no obvious correlation between Fourier coefficients and luminosity for the whole magnitude range (-12 ≳ MV ≳ -22); however, dwarfs display much higher dispersions at all radii. © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.es_ES
dc.description.urihttps://academic.oup.com/mnras/article/477/2/1760/4924514
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 477(2), pp. 1760-1771es_ES
dc.identifier.issn0035-8711
dc.identifier.otherDOI: 10.1093/mnras/sty611
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/8923
dc.language.isoenes_ES
dc.publisherOxford University Presses_ES
dc.subjectCD- galaxies: Fundamental parameterses_ES
dc.subjectGalaxies: Clusters: Generales_ES
dc.subjectGalaxies: Clusters: Individual: Antliaes_ES
dc.subjectGalaxies: Dwarfes_ES
dc.subjectGalaxies: Elliptical and lenticulares_ES
dc.titleEarly-type galaxies in the Antlia cluster: Catalogue and isophotal analysises_ES
dc.typeArtículoes_ES
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