RT Journal Article
T1 No direct coupling between bending of galaxy disc stellar age and light profiles
A1 Marino, Raffaella Anna
A1 otros, ...
AB We study the stellar properties of 44 face-on spiral galaxies from the Calar Alto Legacy Integral Field Area survey via full spectrum fitting techniques. We compare the age profiles with the surface brightness distribution in order to highlight differences between profile types (type I, exponential profile; and II, down-bending profile). We observe an upturn ('U-shape') in the age profiles for 17 out of these 44 galaxies with reliable stellar information up to their outer parts. This 'U-shape' is not a unique feature for type II galaxies but can be observed in type I as well. These findings suggest that the mechanisms shaping the surface brightness and stellar population distributions are not directly coupled. This upturn in age is only observable in the light-weighted profiles while it flattens out in the mass-weighted profiles. Given recent results on the outer parts of nearby systems and the results presented in this Letter, one of the most plausible explanations for the age upturn is an early formation of the entire disc(~10 Gyr ago) followed by an inside-out quenching of the star formation.
PB Wiley
SN 0035-8711
YR 2016
FD 2016-02-11
LK https://hdl.handle.net/20.500.14352/24352
UL https://hdl.handle.net/20.500.14352/24352
LA eng
NO © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. Artículo firmado por 21 autores. This Letter is based on data from the CALIFA Survey (http://califa.caha.es), funded by the Spanish Ministry of Science (grant ICTS-2009-10), and the Centro Astronómico Hispano-Alemán. This research has been partly supported by the Spanish Ministry of Science and Innovation under grants AYA2011-24728, AYA2013-48226-C3-1-P and Consolider-Ingenio CSD2010-00064; and by the Junta de Andalucía (FQM-108). TRL thanks the support of the Spanish Ministerio de Educación, Cultura y Deporte (FPU fellowship). We acknowledge the usage of the HyperLeda data base (http://leda.univ-lyon1.fr) and SDSS data (http://www.sdss.org/collaboration/citing-sdss/).
NO Ministerio de Economía y Competitividad (MINECO), España
NO Centro Astronómico Hispano-Alemán (CAHA)
NO Ministerio de Ciencia e Innovación (MICINN), España
NO Junta de Andalucía
NO Ministerio de Educación, Cultura y Deporte (MECD), España
NO Formación del Profesorado Universitario (FPU), MECD, España
NO Programa Consolider Ingenio (MICINN), España
DS Docta Complutense
RD 6 abr 2025