P-MaNGA Galaxies: emission-lines properties – gas ionization and chemical abundances from prototype observations
Author | dc.contributor.author | Blanc Mendiberri, Guillermo | |
Author | dc.contributor.author | Belfiore, F. | |
Author | dc.contributor.author | Maiolino, R. | |
Author | dc.contributor.author | Bundy, K. | |
Author | dc.contributor.author | Thomas, D. | |
Author | dc.contributor.author | Maraston, C. | |
Author | dc.contributor.author | Wilkinson, D. | |
Author | dc.contributor.author | Sanchez, S. F. | |
Author | dc.contributor.author | Bershady, M. | |
Author | dc.contributor.author | Bothwell, M. | |
Author | dc.contributor.author | Cales, S. L. | |
Author | dc.contributor.author | Coccato, L. | |
Author | dc.contributor.author | Drory, N. | |
Author | dc.contributor.author | Emsellem, E. | |
Author | dc.contributor.author | Fu, H. | |
Author | dc.contributor.author | Gelfand, J. | |
Author | dc.contributor.author | Law, D. | |
Author | dc.contributor.author | Masters, K. | |
Author | dc.contributor.author | Parejko, J. | |
Author | dc.contributor.author | Tremonti, C. | |
Author | dc.contributor.author | Wake, D. | |
Author | dc.contributor.author | Weijmans, A. | |
Author | dc.contributor.author | Yan, R. | |
Author | dc.contributor.author | Xiao, T. | |
Author | dc.contributor.author | Zhang, K. | |
Author | dc.contributor.author | Zheng, T. | |
Author | dc.contributor.author | Bizyaev, D. | |
Author | dc.contributor.author | Kinemuchi, K. | |
Author | dc.contributor.author | Oravetz, D. | |
Author | dc.contributor.author | Simmons, A. | |
Admission date | dc.date.accessioned | 2015-04-24T18:05:02Z | |
Available date | dc.date.available | 2015-04-24T18:05:02Z | |
Publication date | dc.date.issued | 2015 | |
Cita de ítem | dc.identifier.citation | MNRAS 449, 867–900 (2015) | en_US |
Identifier | dc.identifier.other | doi:10.1093/mnras/stv296 | |
Identifier | dc.identifier.uri | https://repositorio.uchile.cl/handle/2250/130242 | |
General note | dc.description | Artículo de publicación ISI | en_US |
Abstract | dc.description.abstract | MaNGA (Mapping Nearby Galaxies at Apache Point Observatory) is a 6-yr Sloan Digital Sky Survey (SDSS-IV) survey that will obtain spatially resolved spectroscopy from 3600 to 10 300 Å for a representative sample of over 10 000 nearby galaxies. In this paper, we present the analysis of nebular emission-line properties using observations of 14 galaxies obtained with P-MaNGA, a prototype of the MaNGA instrument. By using spatially resolved diagnostic diagrams, we find extended star formation in galaxies that are centrally dominated by Seyfert/LINER-like emission, which illustrates that galaxy characterizations based on single fibre spectra are necessarily incomplete. We observe extended low ionization nuclear emission-line regions (LINER)-like emission (up to 1Re) in the central regions of three galaxies. We make use of the Hα equivalent width [EW(Hα)] to argue that the observed emission is consistent with ionization from hot evolved stars. We derive stellar population indices and demonstrate a clear correlation between Dn(4000) and EW(HδA) and the position in the ionization diagnostic diagram: resolved galactic regions which are ionized by a Seyfert/LINER-like radiation field are also devoid of recent star formation and host older and/or more metal-rich stellar populations. We also detect extraplanar LINER-like emission in two highly inclined galaxies, and identify it with diffuse ionized gas. We investigate spatially resolved metallicities and find a positive correlation between metallicity and star formation rate surface density. We further study the relation between N/O versus O/H on resolved scales. We find that, at given N/O, regions within individual galaxies are spread towards lower metallicities, deviating from the sequence defined by galactic central regions as traced by Sloan 3-arcsec fibre spectra. We suggest that the observed dispersion can be a tracer for gas flows in galaxies: infalls of pristine gas and/or the effect of a galactic fountain. | en_US |
Lenguage | dc.language.iso | en | en_US |
Publisher | dc.publisher | Royal Astronomical Society | en_US |
Type of license | dc.rights | Atribución-NoComercial-SinDerivadas 3.0 Chile | * |
Type of license | dc.rights | Atribución-NoComercial-SinDerivadas 3.0 Chile | * |
Link to License | dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ | * |
Keywords | dc.subject | galaxies: abundances | en_US |
Keywords | dc.subject | galaxies: active | en_US |
Keywords | dc.subject | galaxies: evolution | en_US |
Keywords | dc.subject | galaxies: fundamental parameters | en_US |
Keywords | dc.subject | galaxies: ISM. | en_US |
Título | dc.title | P-MaNGA Galaxies: emission-lines properties – gas ionization and chemical abundances from prototype observations | en_US |
Document type | dc.type | Artículo de revista |
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