Mañana, JUEVES, 24 DE ABRIL, el sistema se apagará debido a tareas habituales de mantenimiento a partir de las 9 de la mañana. Lamentamos las molestias.
Outer-disk reddening and gas-phase metallicities: The CALIFA connection
Author
Sánchez-Blázquez, Patricia; Marino, R. A.; Gil De Paz, A.; Sánchez, S. F.; Sánchez-Blázquez, Patricia; Cardiel, N.; Castillo- Morales, A.; Pascual, S.; Vílchez, J.; Kehrig, C.; Mollá, M.; Méndez-Abreu, Jairo; Catalán-Torrecilla, C.; Florido, E.; Perez, I.; Ruiz-Lara, T.; Ellis, S.; López-Sánchez, A. R.; González Delgado, R.M; De Lorenzo-Cáceres, A.; García-Benito, R.; Galbany, L.; Cortijo, C.; Kalinova, V.; Mast, D.; Iglesias-Páramo, J.; Papaderos, P.; Walcher, C.J.; Bland-Hawthorn, J.; Zibetti, S.; CALIFA TeamEntity
UAM. Departamento de Física TeóricaPublisher
EDP SciencesDate
2015-09-10Citation
10.1051/0004-6361/201526986
Astronomy and Astrophysics 585 (2016): A47
ISSN
0004-6361 (print); 1432-0746 (online)DOI
10.1051/0004-6361/201526986Funded by
We acknowledge support from the Plan Nacional de Investigación y Desarrollo funding programs, AyA2010-15081, AyA2012-30717 and AyA2013-46724P, of Spanish Ministerio de Economía y Competitividad (MINECO). A.G.d.P. acknowledges the support from the FP7 Marie Curie Actions of the European Commission, via the Initial Training Network DAGAL under REA grant agreement PITNGA- 2011-289313. C.C.-T. thanks the support of the Spanish Ministerio de Educación, Cultura y Deporte by means of the FPU fellowship program. C.J.W. acknowledges support through the Marie Curie Career Integration Grant 303912. Support for L.G. is provided by the Ministry of Economy, Development, and Tourism’s Millennium Science Initiative through grant IC 120009, awarded to The Millennium Institute of Astrophysics, MAS. L.G. acknowledges support by CONIC YT through FONDECYT grant 3140566. S.F.S. thanks the CONACYT-125180 and DGAPA-IA100815 projects for providing him support in this study. J.M.A. acknowledges support from the European Research Council Starting Grant (SEDmorph; P.I. V. Wild). P.P. is supported by FCT through the Investigador FCT Contract No. IF/01220/2013 and POPH/FSE (EC) by FEDER funding through the program COMPETE. He also acknowledges support by FCT under project FCOMP-01-0124-FEDER-029170 (Reference FCT PTDC/FISAST/ 3214/2012), funded by FCT-MEC (PIDDAC) and FEDER (COMPETE)Project
Gobierno de España.AyA2010-15081; Gobierno de España.AyA2012-30717; Gobierno de España.AyA2013-46724P; info:eu-repo/grantAgreement/EC/FP7/289313; info:eu-repo/grantAgreement/EC/FP7/303912; info:eu-repo/grantAgreement/EC/FP7/306299Editor's Version
http://dx.doi.org/10.1051/0004-6361/201526986Subjects
Galaxies: abundances; Galaxies: evolution; Galaxies: photometry; Galaxies: ISM; ISM: abundances; Hii regions; FísicaNote
Astronomy and Astrophysics 585 (2016): A47 reproduced with permission from Astronomy & AstrophysicsRights
© 2015 ESOAbstract
We study, for the first time in a statistically significant and well-defined sample, the relation between the outer-disk ionized-gas metallicity gradients and the presence of breaks in the surface brightness profiles of disk galaxies. Sloan Digital Sky Survey (SDSS) g′- and r′-band surface brightness, (g′ - r′) color, and ionized-gas oxygen abundance profiles for 324 galaxies within the Calar Alto Legacy Integral Field Area (CALIFA) survey are used for this purpose. We perform a detailed light-profile classification, finding that 84% of our disks show down- or up-bending profiles (Type II and Type III, respectively), while the remaining 16% are well fitted by one single exponential (Type I). The analysis of the color gradients at both sides of this break shows a U-shaped profile for most Type II galaxies with an average minimum (g′ - r′) color of ∼ 0.5mag and an ionized-gas metallicity flattening associated with it only in the case of low-mass galaxies. Comparatively, more massive systems show a rather uniform negative metallicity gradient. The correlation between metallicity flattening and stellar mass for these systems results in p-values as low as 0.01. Independent of the mechanism having shaped the outer light profiles of these galaxies, stellar migration or a previous episode of star formation in a shrinking star-forming disk, it is clear that the imprint in their ionized-gas metallicity was different for low- and high-mass Type II galaxies. In the case of Type III disks, a positive correlation between the change in color and abundance gradient is found (the null hypothesis is ruled out with a p-value of 0.02), with the outer disks of Type III galaxies with masses ≤1010 M′ showing a weak color reddening or even a bluing. This is interpreted as primarily due to a mass downsizing effect on the population of Type III galaxies that recently experienced an enhanced inside-out growth
Files in this item
Google Scholar:Sánchez-Blázquez, Patricia
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Marino, R. A.
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Gil De Paz, A.
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Sánchez, S. F.
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Sánchez-Blázquez, Patricia
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Cardiel, N.
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Castillo- Morales, A.
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Pascual, S.
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Vílchez, J.
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Kehrig, C.
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Mollá, M.
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Méndez-Abreu, Jairo
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Catalán-Torrecilla, C.
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Florido, E.
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Perez, I.
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Ruiz-Lara, T.
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Ellis, S.
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López-Sánchez, A. R.
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González Delgado, R.M
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De Lorenzo-Cáceres, A.
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García-Benito, R.
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Galbany, L.
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Cortijo, C.
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Kalinova, V.
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Mast, D.
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Iglesias-Páramo, J.
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Papaderos, P.
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Walcher, C.J.
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Bland-Hawthorn, J.
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Zibetti, S.
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CALIFA Team
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