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Metallicity gradients in nearby star forming galaxies

Published online by Cambridge University Press:  03 March 2020

Francesco Belfiore
Francesco Belfiore*
Affiliation:
University of California Observatories - Lick Observatory, University of California Santa Cruz, 1156 High St., Santa Cruz, CA95064, USA email: [email protected]
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Abstract

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I study the gas phase metallicity (O/H) radial profiles in a representative sample of 550 nearby star forming galaxies with resolved spectroscopic data from the SDSS-IV MaNGA survey. Using strong-line ratio diagnostics (R23 and O3N2) and referencing to the effective (half-light) radius (Re), I find that the metallicity gradient steepens with stellar mass going from log(M/Mȯ) = 9.0 to log(M/Mȯ) = 10.5. At higher masses a flattening of the metallicity radial profile is observed in the central regions (R < 1Re). These findings are in agreement with recent independent analysis of other large samples of nearby galaxies.

Keywords

galaxies: abundancesgalaxies: ISMgalaxies: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium A30: Astronomy in Focus XXX , August 2018 , pp. 249 - 250
Copyright
© International Astronomical Union 2020

References

Baldwin, J. A., Phillips, M. M., Terlevich, R. 1981, PASP, 93, 5 Google Scholar
Belfiore, F. et al. 2016, MNRAS, 461, 3111 CrossRefGoogle Scholar
Belfiore, F. et al. 2017, MNRAS, 469, 151 CrossRefGoogle Scholar
Bundy, K. et al. 2015, ApJ, 798, 7 CrossRefGoogle Scholar
Croom, S. et al. 2012, MNRAS, 421, 872 Google Scholar
Larson, R. B. 1976, MNRAS, 176, 31 Google Scholar
Maiolino, R. et al. 2008, A&A, 488, 463 Google Scholar
Matteucci, F. & François, P. 1993, MNRAS, 239, 885 CrossRefGoogle Scholar
Pettini, M. & Pagel, B. E. J. 2004, MNRAS 348, L59 CrossRefGoogle Scholar
Pezzulli, G. & Fraternali, F. 2015, MRNAS, 455, 2308 CrossRefGoogle Scholar
Van Zee, L., Salzer, J. J., Haynes, M P. 1998, ApJ, 497, 10 Google Scholar
Vila-Costas, N. B. & Edmunds, M. 1992, MNRAS, 259, 121 CrossRefGoogle Scholar
Sánchez, S. F. et al. 2012, A&A, 538, A8 Google Scholar
Sánchez-Menguiano, L. et al. 2016, A&A, 587, A70 Google Scholar
Sánchez-Menguiano, L. et al. 2017, A&A, 609, A119 Google Scholar