Characterizing the MZR at global scales
Abstract
We explore at the most suitable functional form of the mass metallicity relation using integrated properties from (∼970 galaxies) from the extended version of the CALIFA integral field spectroscopy data. We explore different functional forms (linear, 3rd degree polynomial, and exponential) as well as different statistical environments: (1) fixed size binning, (2) variable size binning, (3) not applying any binning, and (4) reducing scatter. We derive the ionized-gas metallicity for each galaxy, using the O3N2 strong-lines calibrator derived by Marino et al. (2013). To test the goodness of the fit to the MZR, we identify the function that yields the smallest scatter in its residuals. We use this residual to explore the secondary relation of the MZR with other observables (SFR, gas mass and gas fraction). Among other results, we identify the lack of strong correlation between these residuals and the SFR, in contrast to previous (e.g., Mannucci et al 2010). Our results suggest that the functional form and the presence of secondary relations may depend on statistical treatment
- Publication:
-
XIV.0 Scientific Meeting (virtual) of the Spanish Astronomical Society
- Pub Date:
- July 2020
- Bibcode:
- 2020sea..confE...2A