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Artículo

Nearby supernova host galaxies from the CALIFA survey: II. Supernova environmental metallicity

Galbany, Lluís; Stanishev, V.; Mourão, A. M.; Rodrigues, M.; Flores, H.; Walcher, C. J.; Sánchez, S. F.; García Benito, Rubén; Mast, DamianIcon ; Badenes, C.; González Delgado, R. M.; Kehrig, C.; Lyubenova, M.; Marino, R. A.; Mollá, M.; Meidt, S.; Pérez, E.; van de Ven, G.; Vílchez, J. M.
Fecha de publicación: 06/2016
Editorial: EDP Sciences
Revista: Astronomy and Astrophysics
ISSN: 0004-6361
e-ISSN: 1432-0746
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Astronomía

Resumen

The metallicity of a supernova progenitor, together with its mass, is one of the main parameters that can rule the progenitor's fate. We present the second study of nearby supernova (SN) host galaxies (0.005 10 dex) by targeted searches. We neither found evidence that the metallicity at the SN location differs from the average metallicity at the galactocentric distance of the SNe. By extending our SN sample with published metallicities at the SN location, we are able to study the metallicity distributions for all SN subtypes split into SN discovered in targeted and untargeted searches. We confirm a bias toward higher host masses and metallicities in the targeted searches. By combining data from targeted and untargeted searches, we found a sequence from higher to lower local metallicity: SN Ia, Ic, and II show the highest metallicity, which is significantly higher than those of SN Ib, IIb, and Ic-BL. Our results support the scenario according to which SN Ib result from binary progenitors. Additionally, at least part of the SN Ic are the result of single massive stars that were stripped of their outer layers by metallicity-driven winds. We studied several proxies of the local metallicity that are frequently used in the literature and found that the total host metallicity allows estimating the metallicity at the SN location with an accuracy better than 0.08 dex and very small bias. In addition, weak AGNs that cannot be seen in the total spectrum may weakly bias (by 0.04 dex) the metallicity estimate that is derived from the galaxy-integrated spectrum.
Palabras clave: GALAXIES: ABUNDANCES , GALAXIES: GENERAL , SUPERNOVAE: GENERAL
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/180061
DOI: http://dx.doi.org/10.1051/0004-6361/201528045
URL: https://www.aanda.org/articles/aa/full_html/2016/07/aa28045-15/aa28045-15.html
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Articulos(CCT - CORDOBA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Citación
Galbany, Lluís; Stanishev, V.; Mourão, A. M.; Rodrigues, M.; Flores, H.; et al.; Nearby supernova host galaxies from the CALIFA survey: II. Supernova environmental metallicity; EDP Sciences; Astronomy and Astrophysics; 591; A48; 6-2016; 1-25
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