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Título: | Spatially resolved properties of the ionized gas in the H II galaxy J084220+115000 |
Autor: | Fernández-Arenas, D.; Carrasco, E.; Terlevich, R.; Terlevich, E.; Amorín, R.; Bresolin, F.; Chávez, R.; González-Morán, A. L.; Rosa-González, D.; Mayya, Y. D.; Vega, O.; Zaragoza-Cardiel, J.; Méndez-Abreu, J.; Izazaga-Pérez, R.; Gil de Paz, A.; Gallego, J.; Iglesias-Páramo, J. CSIC ORCID; García-Vargas, M. L.; Gómez-Alvarez, P.; Castillo-Morales, A.; Cardiel, N.; Pascual, S.; Pérez-Calpena, A. | Palabras clave: | H II regions Galaxies: dwarf Galaxies: individual: J084220+115000 ISM-galaxies: starburst |
Fecha de publicación: | 13-ene-2023 | Editor: | Oxford University Press | Citación: | Monthly Notices of the Royal Astronomical Society 519(3): 4221-4240 (2023) | Resumen: | We present a spatially resolved spectroscopic study for the metal poor H II galaxy J084220+115000 using MEGARA Integral Field Unit observations at the Gran Telescopio Canarias. We estimated the gas metallicity using the direct method for oxygen, nitrogen, and helium and found a mean value of 12 + log (O/H) = 8.03 ± 0.06, and integrated electron density and temperature of ∼161 cm−3 and ∼15400 K, respectively. The metallicity distribution shows a large range of Δ(O/H) = 0.72 dex between the minimum and maximum (7.69 ± 0.06 and 8.42 ± 0.05) values, unusual in a dwarf star-forming galaxy. We derived an integrated log (N/O) ratio of −1.51 ± 0.05 and found that both N/O and O/H correspond to a primary production of metals. Spatially resolved maps indicate that the gas appears to be photoionized by massive stars according to the diagnostic line ratios. Between the possible mechanisms to explain the starburst activity and the large variation of oxygen abundance in this galaxy, our data support a possible scenario where we are witnessing an ongoing interaction triggering multiple star-forming regions localized in two dominant clumps. © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society. | Versión del editor: | http://dx.doi.org/10.1093/mnras/stac3309 | URI: | http://hdl.handle.net/10261/309460 | DOI: | 10.1093/mnras/stac3309 | ISSN: | 0035-8711 | E-ISSN: | 1365-2966 |
Aparece en las colecciones: | (IAA) Artículos |
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2023MNRAS.519.4221F.pdf | 4,27 MB | Adobe PDF | Visualizar/Abrir |
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