Chemical Abundances of NGC 5461 and NGC 5471 derived from Echelle Spectrophotometry

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dc.creatorLuridiana, V.
dc.creatorEsteban, C.
dc.creatorPeimbert, M.
dc.creatorPeimbert, A.
dc.date2002-05-02
dc.date.accessioned2026-07-07T02:03:32Z
dc.date.available2026-07-07T02:03:32Z
dc.descriptionWe present high resolution spectroscopic data of the two giant extragalactic H II regions NGC 5461 and NGC 5471 in M101, which have been obtained with the 2.1-m telescope of the Observatorio Astronómico Nacional in San Pedro Mártir, Baja California. We measured the intensities of several H and He recombination lines, and of forbidden lines of a large number of ions. We calculate the physical conditions in the two nebulae with a large number of diagnostics and determine their chemical abundances by applying ionization correction factors icf's to the observed ionic abundances. For NGC 5461, the icf's are based on a tailored photoionization model of the region (Luridiana & Peimbert 2001), while for NGC 5471 they are computed from those predicted by a photoionization model of NGC 2363 (Luridiana, Peimbert, & Leitherer 1999), a region which is similar to NGC 5471 in the ionization structure. For both regions, the icf's are compared to those computed following the prescriptions by Mathis & Rosa (1991). Such comparison shows large discrepancies for several elements, including nitrogen, neon, and chlorine.
dc.description13 pages, 8 tables, RMAA Latex. Published in Rev. Mex. Astr. Astrof., 38, 97 (2002)
dc.identifierhttps://arxiv.org/abs/astro-ph/0205021
dc.identifierhttp://arxiv.org/abs/astro-ph/0205021
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/4416
dc.subjectAstrophysics
dc.titleChemical Abundances of NGC 5461 and NGC 5471 derived from Echelle Spectrophotometry
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