English

Temperature inhomogeneities in Mrk71 can not be discarded

Astrophysics of Galaxies 2023-10-03 v1

Abstract

In a very recent work, [1] claim that the scenario of temperature inhomogeneities proposed by [2] (t2t2 > 0) is not able to explain the O2+^{2+}/H+^{+} abundance discrepancy observed between the calculations based on the optical [OIII] collisional excited lines (CELs) and the OII recombination lines (RLs) in the star forming galaxy Mrk71. In this work, we show that conclusions of [1] depend on several assumptions on the absolute flux calibration, reddening correction and the adopted electron density. In fact, using the data of [1] in a different way and even considering their 1{\sigma} uncertainties, it is possible to reach the opposite conclusion, consistent with t2t2 = 0.0970.009+0.0080.097 ^{+0.008}_{-0.009}. Therefore, the existence of temperature inhomogeneities causing the O2+^{2+}/H+^{+} abundance discrepancy in Mrk71 can not be ruled out.

Keywords

Cite

@article{arxiv.2310.01197,
  title  = {Temperature inhomogeneities in Mrk71 can not be discarded},
  author = {J. Eduardo Méndez-Delgado and César Esteban and Jorge García-Rojas and Kathryn Kreckel and Manuel Peimbert},
  journal= {arXiv preprint arXiv:2310.01197},
  year   = {2023}
}

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