| Texto completo | |
| Autor(es): |
Krabbe, A. C.
[1]
;
Oliveira, C. B.
[1]
;
Zinchenko, I. A.
[2, 3]
;
Hernandez-Jimenez, J. A.
[4]
;
Dors, O. L.
[1]
;
Haegele, G. F.
[5, 6]
;
Cardaci, V, M.
;
Telles, N. R.
[1]
Número total de Autores: 8
|
| Afiliação do(s) autor(es): | [1] Univ Vale Paraiba, Av Shishima Hifumi 2911, BR-12244000 Sao Jose Dos Campos, SP - Brazil
[2] Ludwig Maximilians Univ Munchen, Fac Phys, Scheinerstr 1, D-81679 Munich - Germany
[3] Natl Acad Sci Ukraine, Main Astron Observ, 27 Akad Zabolotnoho St, UA-03680 Kiev - Ukraine
[4] Univ Andres Bello, Dept Ciencias Fis, Fernandez Concha 700, Santiago - Chile
[5] V, Inst Astrofis La Plata UNLP CONICET, La Plata - Argentina
[6] V, Univ Nacl La Plata, Fac Ciencias Astronom & Geofis, Paseo Del Bosque S-N, RA-1900 La Plata - Argentina
Número total de Afiliações: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Monthly Notices of the Royal Astronomical Society; v. 505, n. 2, p. 2087-2102, AUG 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
Chemical abundance determinations in Low-Ionization Nuclear Emission-line Regions (LINERs) are especially complex and uncertain because the nature of the ionizing source of this kind of object is unknown. In this work, we study the oxygen abundance in relation to the hydrogen abundance (O/H) of the gas phase of the UGC4805 LINER nucleus. Optical spectroscopic data from the Mapping Nearby Galaxies survey was employed to derive the O/H abundance of the UGC4805 nucleus based on the extrapolation of the disc abundance gradient, on calibrations between O/H abundance and strong emission-lines for active galactic nuclei (AGNs) as well as on photoionization models built with the Cloudy code, assuming gas accretion into a black hole (AGN) and post-asymptotic giant branch (p-AGB) stars with different effective temperatures. We found that abundance gradient extrapolations, AGN calibrations, AGN, and p-AGB photoionization models produce similar O/H values for the UGC4805 nucleus and similar ionization parameter values. The study demonstrated that the methods used to estimate the O/H abundance using nuclear emission-line ratios produce reliable results, which are in agreement with the O/H values obtained from the independent method of galactic metallicity gradient extrapolation. Finally, the results from the WHAN diagram combined with the fact that the high excitation level of the gas has to be maintained at kpc scales, we suggest that the main ionizing source of the UGC4805 nucleus probably has a stellar origin rather than an AGN. (AU) | |
| Processo FAPESP: | 19/11934-0 - Abundância química em galáxias liner com o SDSS-IV MaNGA |
| Beneficiário: | Celso Benedito de Oliveira Junior |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |