| Texto completo | |
| Autor(es): |
Riffel, R.
[1]
;
Rodriguez-Ardila, A.
[2]
;
Aleman, I.
[1]
;
Brotherton, M. S.
[3]
;
Pastoriza, M. G.
[1]
;
Bonatto, C.
[1]
;
Dors, Jr., O. L.
[4]
Número total de Autores: 7
|
| Afiliação do(s) autor(es): | [1] Univ Fed Rio Grande do Sul, Dept Astron, Porto Alegre, RS - Brazil
[2] Lab Nacl Astrofis MCTI, BR-37504364 Itajuba, MG - Brazil
[3] Univ Wyoming, Dept Phys & Astron, Laramie, WY 82071 - USA
[4] Univ Vale do Praiba, BR-12244000 Sao Jose Dos Campos, SP - Brazil
Número total de Afiliações: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Monthly Notices of the Royal Astronomical Society; v. 430, n. 3, p. 2002-2017, APR 2013. |
| Citações Web of Science: | 37 |
| Resumo | |
We study the kinematics and excitation mechanisms of H-2 and {[}Fe II] lines in a sample of 67 emission-line galaxies with Infrared Telescope Facility SpeX near-infrared (0.8-2.4 mu m) spectroscopy together with new photoionization models. H-2 emission lines are systematically narrower than narrow-line region lines, suggesting that the two are, very likely, kinematically disconnected. The new models and emission-line ratios show that the thermal excitation plays an important role not only in active galactic nuclei but also in star-forming galaxies. The importance of the thermal excitation in star-forming galaxies may be associated with the presence of supernova remnants close to the region emitting H-2 lines. This hypothesis is further supported by the similarity between vibrational and rotational temperatures of H-2. We confirm that the diagram involving the line ratios H-2 2.121 mu m/Br gamma and {[}Fe II] 1.257 mu m/Pa beta is an efficient tool for separating emission-line objects according to their dominant types of activities. We suggest new limits to the line ratios in order to discriminate between the different types of nuclear activities. (AU) | |
| Processo FAPESP: | 07/04498-2 - Emissao de h2 em nucleos ativos de galaxias. |
| Beneficiário: | Isabel Regina Guerra Aleman |
| Linha de fomento: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 09/14787-7 - Propriedades físicas de regiões de formação estelar em anéis circumnucleares e em (U)LIRGs |
| Beneficiário: | Oli Luiz Dors Junior |
| Linha de fomento: | Auxílio à Pesquisa - Apoio a Jovens Pesquisadores |