2024-03-29T05:33:46Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1707452020-12-13T09:12:27Zcom_10261_37com_10261_4col_10261_290
2018-10-08T11:00:40Z
urn:hdl:10261/170745
Evolution of the anti-truncated stellar profiles of S0 galaxies since z = 0.6 in the SHARDS survey
Borlaff, Alejandro
Eliche-Moral, M. Carmen
Beckman, John E.
Ciambur, Bogdan C.
Pérez-González, Pablo G.
Barro, Guillermo
Cava, Antonio
Cardiel, Nicolás
Ministerio de Economía y Competitividad (España)
Instituto de Astrofísica de Canarias
Galaxies: elliptical and lenticular, cD
Galaxies: structure
Galaxies: fundamental parameters
Methods: observational
Methods: statistical
[Context]: The controversy about the origin of the structure of early-type S0-E/S0 galaxies may be due to the difficulty of comparing surface brightness profiles with different depths, photometric corrections and point spread function (PSF) effects (which are almost always ignored). [Aims]: We aim to quantify the properties of Type-III (anti-truncated) discs in a sample of S0 galaxies at 0.2 <z< 0.6. In this paper, we present the sample selection and describe in detail the methods to robustly trace the structure in their outskirts and correct for PSF effects. [Methods]: We have selected and classified a sample of 150 quiescent galaxies at 0.2 <z< 0.6 in the GOODS-N field. We performed a quantitative structural analysis of 44 S0-E/S0 galaxies. We have corrected their surface brightness profiles for PSF distortions and analysed the biases in the structural and photometric parameters when the PSF correction is not applied. Additionally, we have developed Elbow, an automatic statistical method to determine whether a possible break is significant-or not-and its type. We have made this method publicly available. [Results]: We find 14 anti-truncated S0-E/S0 galaxies in the range 0.2 <z< 0.6 (~30% of the final sample). This fraction is similar to the those reported in the local Universe. In our sample, ~25% of the Type-III breaks observed in PSF-uncorrected profiles are artifacts, and their profiles turn into a Type I after PSF correction. PSF effects also soften Type-II profiles. We find that the profiles of Type-I S0 and E/S0 galaxies of our sample are compatible with the inner profiles of the Type-III, in contrast with the outer profiles. [Conclusions]: We have obtained the first robust and reliable sample of 14 anti-truncated S0-E/S0 galaxies beyond the local Universe, in the range 0.2 <z< 0.6. PSF effects significantly affect the shape of the surface brightness profiles in galaxy discs even in the case of the narrow PSF of HST/ACS images, so future studies on the subject should make an effort to correct them.
2018-10-08T11:00:40Z
2018-10-08T11:00:40Z
2017
2018-10-08T11:00:41Z
artículo
Astronomy and Astrophysics 604: A119 (2017)
http://hdl.handle.net/10261/170745
10.1051/0004-6361/201630282
http://dx.doi.org/10.13039/501100003329
eng
Publisher's version
https://doi.org/10.1051/0004-6361/201630282
Sí
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2015-70815-ERC
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2015-63650-P
openAccess
EDP Sciences