Breaks in the radial oxygen abundance and corotation radius of three spiral galaxies

Autor(es)

Scarano, Jr., S. ^{[1, 2]} ; Lepine, J. R. D. ^[1] ; Marcon-Uchida, M. M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508900 Sao Paulo - Brazil

^[2] So Astrophys Res Telescope SOAR, La Serena - Chile

• Tipo de documento: Artigo Científico
• Fonte: Monthly Notices of the Royal Astronomical Society; v. 412, n. 3, p. 1741-1754, APR 2011.
• Citações Web of Science: 15

Resumo

The correlation between the breaks in the metallicity distribution and the corotation radius of spiral galaxies has been already advocated in the past and is predicted by a chemodynamical model of our Galaxy that effectively introduces the role of spiral arms in the star formation rate. In this work, we present photometric and spectroscopic observations made with the Gemini Telescope for three of the best candidates of spiral galaxies to have the corotation inside the optical disc: IC 0167, NGC 1042 and NGC 6907. We observed the most intense and well-distributed H ii regions of these galaxies, deriving reliable galactocentric distances and oxygen abundances by applying different statistical methods. From these results, we confirm the presence of variations in the gradients of metallicity of these galaxies that are possibly correlated with the corotation resonance. (AU)

• Processo FAPESP: 09/05181-8 - Determinação da Orientação Espacial de Galáxias Utilizando Braços Espirais e Campos de Velocidade
• Beneficiário: Sergio Scarano Junior
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado