Spatially resolved properties of the ionized gas in the H ii galaxy J084220+115000

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dc.contributor.authorFernandez-Arenas, D., Carrasco, E., Terlevich, R., Terlevich, E., Amorin, R., Bresolin, F., Chavez, R., Gonzalez-Moran, A. L., Rosa-Gonzalez, D., Mayya, Y. D., Vega, O., Zaragoza-Cardiel, J., Mendez-Abreu, J., Izazaga-Perez, R., Gil de Paz, A., Gallego, J., Iglesias-Paramo, J., Garcia-Vargas, M. L., Gomez-Alvarez, P., Castillo-Morales, A., Cardiel, N., Pascual, S., Perez-Calpena, A.
dc.date.accessioned2024-11-27T21:50:36Z
dc.date.available2024-11-27T21:50:36Z
dc.date.issued2023/01/09
dc.description.abstractWe 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 similar to 161 cm(-3) and similar to 15400 K, respectively. The metallicity distribution shows a large range of Delta(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.
dc.identifier.doihttp://dx.doi.org/10.1093/mnras/stac3309
dc.identifier.issn0035-8711
dc.identifier.urihttps://publicacionesabiertas.userena.cl/handle/123456789/96
dc.languageEnglish
dc.publisherOXFORD UNIV PRESS
dc.subjectINTEGRAL FIELD SPECTROSCOPY, INDEPENDENT COSMOLOGICAL CONSTRAINTS, PRIMORDIAL HELIUM ABUNDANCE, EMISSION-LINE GALAXIES, COMPACT DWARF GALAXIES, STAR-FORMING REGIONS, METAL-POOR GALAXIES, LYMAN-BREAK ANALOGS, EQUATION-OF-STATE, HII GALAXIES
dc.titleSpatially resolved properties of the ionized gas in the H ii galaxy J084220+115000
dc.typeArticle

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