Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-24T12:26:09.482Z Has data issue: false hasContentIssue false

New empirical metallicity calibrations: Joint analysis of CALIFA data and literature Te-based measurements

Published online by Cambridge University Press:  09 February 2015

R. A. Marino
Affiliation:
CEI Campus Moncloa, UCM-UPM, Departamento de Astrofísica y CC. de la Atmósfera, Facultad de CC. Físicas, Universidad Complutense de Madrid, Avda. Complutense s/n, 28040 Madrid, Spain. email: [email protected]
F. F. Rosales-Ortega
Affiliation:
Instituto Nacional de Astrofísica, Óptica y Electrónica, Puebla, México.
F. Sánchez
Affiliation:
Instituto de Astronomía, Universidad Nacional Autonóma de México, D. F.
A. Gil de Paz
Affiliation:
CEI Campus Moncloa, UCM-UPM, Departamento de Astrofísica y CC. de la Atmósfera, Facultad de CC. Físicas, Universidad Complutense de Madrid, Avda. Complutense s/n, 28040 Madrid, Spain. email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In Marino et al. (2013) we provide revisited empirical calibrations for the oxygen abundances in HII regions based on the O3N2 and N2 indicators. This work is based on the most comprehensive compilation of both Te-based and multiple strong-line (ONS-based) ionized-gas abundance measurements in external galaxies to date in terms of all statistical significance, quality, and coverage of the parameters space. Our dataset compiles the Te-based abundances of 603 HII regions extracted from the literature but also includes new measurements from the CALIFA survey. We also present a comparison between our revisited calibrations with a total of 3423 additional CALIFA HII complexes with abundances derived using the ONS calibration. The O3N2 and N2 indicators can be empirically applied to derive oxygen abundances calibrations from either direct-abundance determinations with random errors of 0.18 and 0.16, respectively, and they show shallower abundance dependencies and statistically significant offsets compared to the classical calibrations (as the one of Pettini & Pagel (2004)).

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2015 

References

Marino, R. A., Rosales-Ortega, F. F., Sánchez, S. F., et al. 2013, A&A, 559, A114Google Scholar
Pettini, M. & Pagel, B. E. J. 2004, MNRAS, 348, L59CrossRefGoogle Scholar