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P-MaNGA galaxies : emission-lines properties – gas ionization and chemical abundances from prototype observations
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dc.contributor.author | Belfiore, F. | |
dc.contributor.author | Maiolino, R. | |
dc.contributor.author | Bundy, K. | |
dc.contributor.author | Thomas, D. | |
dc.contributor.author | Maraston, C. | |
dc.contributor.author | Wilkinson, D. | |
dc.contributor.author | Sánchez, S. F. | |
dc.contributor.author | Bershady, M. | |
dc.contributor.author | Blanc, G. A. | |
dc.contributor.author | Bothwell, M. | |
dc.contributor.author | Cales, S. L. | |
dc.contributor.author | Coccato, L. | |
dc.contributor.author | Drory, N. | |
dc.contributor.author | Emsellem, E. | |
dc.contributor.author | Fu, H. | |
dc.contributor.author | Gelfand, J. | |
dc.contributor.author | Law, D. | |
dc.contributor.author | Masters, K. | |
dc.contributor.author | Parejko, J. | |
dc.contributor.author | Tremonti, C. | |
dc.contributor.author | Wake, D. | |
dc.contributor.author | Weijmans, A. | |
dc.contributor.author | Yan, R. | |
dc.contributor.author | Xiao, T. | |
dc.contributor.author | Zhang, K. | |
dc.contributor.author | Zheng, T. | |
dc.contributor.author | Bizyaev, D. | |
dc.contributor.author | Kinemuchi, K. | |
dc.contributor.author | Oravetz, D. | |
dc.contributor.author | Simmons, A. | |
dc.date.accessioned | 2015-02-18T13:01:09Z | |
dc.date.available | 2015-02-18T13:01:09Z | |
dc.date.issued | 2015-05-01 | |
dc.identifier.citation | Belfiore , F , Maiolino , R , Bundy , K , Thomas , D , Maraston , C , Wilkinson , D , Sánchez , S F , Bershady , M , Blanc , G A , Bothwell , M , Cales , S L , Coccato , L , Drory , N , Emsellem , E , Fu , H , Gelfand , J , Law , D , Masters , K , Parejko , J , Tremonti , C , Wake , D , Weijmans , A , Yan , R , Xiao , T , Zhang , K , Zheng , T , Bizyaev , D , Kinemuchi , K , Oravetz , D & Simmons , A 2015 , ' P-MaNGA galaxies : emission-lines properties – gas ionization and chemical abundances from prototype observations ' , Monthly Notices of the Royal Astronomical Society , vol. 449 , no. 1 , pp. 867-900 . https://doi.org/10.1093/mnras/stv296 | en |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | PURE: 168999745 | |
dc.identifier.other | PURE UUID: b53bc228-ab71-423c-8de3-ea34dfd63c85 | |
dc.identifier.other | BibCode: 2014arXiv1410.7781B | |
dc.identifier.other | Scopus: 84930001068 | |
dc.identifier.other | ORCID: /0000-0002-5908-6852/work/40233496 | |
dc.identifier.other | WOS: 000355345600064 | |
dc.identifier.uri | https://hdl.handle.net/10023/6122 | |
dc.description | This work was supported by the STFC, UK and World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan. | en |
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. | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | en |
dc.rights | © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record: Belfiore F, Maiolino R, Bundy K, Thomas D, Maraston C, Wilkinson D et al. P-MaNGA galaxies: emission-lines properties – gas ionization and chemical abundances from prototype observations. Monthly Notices of the Royal Astronomical Society. 2015 May 1;449(1):867-900, is available online at: mnras.oxfordjournals.org/content/449/1/867.full | en |
dc.subject | Galaxies: abundances | en |
dc.subject | Galaxies: active | en |
dc.subject | Galaxies: evolution | en |
dc.subject | Galaxies: fundamental parameters | en |
dc.subject | Galaxies: ISM | en |
dc.subject | QC Physics | en |
dc.subject | QB Astronomy | en |
dc.subject | NDAS | en |
dc.subject.lcc | QC | en |
dc.subject.lcc | QB | en |
dc.title | P-MaNGA galaxies : emission-lines properties – gas ionization and chemical abundances from prototype observations | en |
dc.type | Journal article | en |
dc.description.version | Postprint | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.identifier.doi | https://doi.org/10.1093/mnras/stv296 | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | http://adsabs.harvard.edu/abs/2014arXiv1410.7781B | en |
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