@misc{10481/75202,
year = {2022},
month = {4},
url = {http://hdl.handle.net/10481/75202},
abstract = {We use a sample of 536 H II regions located in nearby spirals, with a homogeneous determination of their T e -based abundances, to obtain new empirical calibrations of the N2O2, N2S2, O3N2, and N2 strong-line indices to estimate the nitrogen-to-oxygen abundance ratio when auroral lines are not detected. All indices are strongly correlated with the T e -based log (N/O) for our H II re gion sample, ev en more strongly than with 12 + log (O/H). N2O2 is the most strongly correlated index, and the best fit to the log (N/O)–N2O2 relation is obtained with a second-order polynomial. The derived relation has a low dispersion (rms < 0.09 dex), being valid in the range −1.74 < N2O2 < 0.62 (or −1.81 < log (N/O) < −0.13). We have compared our calibration with previous ones and have discussed the differences between them in terms of the nature of the objects used as calibrators.},
organization = {Instituto de Salud Carlos III
Spanish Government		
European Commission	PID2020114414GB-I00	
PID2020-113689GB-I00},
organization = {'Junta de Andalucia' (Spain) local government	FQM108	
AFQM-510-UGR20},
organization = {State Agency for Research of the Spanish 'Ministerio de Ciencia, Innovacon y Universidades' through the 'Center of Excellence Severo Ochoa'	SEV-2017-0709	
PID2019107408GB-C44},
organization = {Junta de Andalucia	EXC/2011 FQM7058},
publisher = {Oxford University Press},
keywords = {ISM: abundances},
keywords = {(ISM:) H II regions},
keywords = {Galaxies: abundances},
keywords = {Galaxies: ISM},
keywords = {Galaxies: spiral},
title = {New calibrations for estimating the N/O ratio in H II regions},
doi = {10.1093/mnras/stac919},
author = {Florido Navio, Estrella and Zurita Muñoz, Almudena and Pérez Montero, Enrique},
}