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

We 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 x 36 arcmin² fields obtained with the MOSAIC II camera at the Blanco 4-m telescope at Cerro Tololo Interameric...

Descripción completa

Detalles Bibliográficos
Autores principales: Calderón, Juan Pablo, Bassino, Lilia Patricia, Cellone, Sergio Aldo, Gómez, Matías
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Ciencias Astronómicas
Galaxies: clusters: general
Galaxies: clusters: individual: Antlia
Galaxies: dwarf
Galaxies: elliptical and lenticular, cD
Galaxies: fundamental parameters
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/123905
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-123905
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Galaxies: clusters: general
Galaxies: clusters: individual: Antlia
Galaxies: dwarf
Galaxies: elliptical and lenticular, cD
Galaxies: fundamental parameters
spellingShingle Ciencias Astronómicas
Galaxies: clusters: general
Galaxies: clusters: individual: Antlia
Galaxies: dwarf
Galaxies: elliptical and lenticular, cD
Galaxies: fundamental parameters
Calderón, Juan Pablo
Bassino, Lilia Patricia
Cellone, Sergio Aldo
Gómez, Matías
Early-type galaxies in the Antlia cluster: Catalogue and isophotal analysis
topic_facet Ciencias Astronómicas
Galaxies: clusters: general
Galaxies: clusters: individual: Antlia
Galaxies: dwarf
Galaxies: elliptical and lenticular, cD
Galaxies: fundamental parameters
description We 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 x 36 arcmin² fields obtained with the MOSAIC 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 Sersic 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.
format Articulo
Articulo
author Calderón, Juan Pablo
Bassino, Lilia Patricia
Cellone, Sergio Aldo
Gómez, Matías
author_facet Calderón, Juan Pablo
Bassino, Lilia Patricia
Cellone, Sergio Aldo
Gómez, Matías
author_sort Calderón, Juan Pablo
title Early-type galaxies in the Antlia cluster: Catalogue and isophotal analysis
title_short Early-type galaxies in the Antlia cluster: Catalogue and isophotal analysis
title_full Early-type galaxies in the Antlia cluster: Catalogue and isophotal analysis
title_fullStr Early-type galaxies in the Antlia cluster: Catalogue and isophotal analysis
title_full_unstemmed Early-type galaxies in the Antlia cluster: Catalogue and isophotal analysis
title_sort early-type galaxies in the antlia cluster: catalogue and isophotal analysis
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/123905
work_keys_str_mv AT calderonjuanpablo earlytypegalaxiesintheantliaclustercatalogueandisophotalanalysis
AT bassinoliliapatricia earlytypegalaxiesintheantliaclustercatalogueandisophotalanalysis
AT cellonesergioaldo earlytypegalaxiesintheantliaclustercatalogueandisophotalanalysis
AT gomezmatias earlytypegalaxiesintheantliaclustercatalogueandisophotalanalysis
bdutipo_str Repositorios
_version_ 1764820450501722112

Ejemplares similares