The nuclear region of NGC 613-II. Kinematics and stellar archaeology

Autor(es)

da Silva, Patricia ^[1] ; Menezes, R. B. ^[2] ; Steiner, J. E. ^[1] ; Fraga, Luciano ^[3]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Dept Astron, BR-05508090 Sao Paulo, SP - Brazil

^[2] Inst Maua Tecnol, Praca Maua 1, BR-09580900 Sao Caetano do Sul, SP - Brazil

^[3] Lab Nacl Astrofis, BR-37504364 Minas Gerais, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Monthly Notices of the Royal Astronomical Society; v. 496, n. 1, p. 943-958, JUL 2020.
• Citações Web of Science: 0

Resumo

In this work, we continue the study of the central region of NGC 613 by da Silva, Menezes \& Steiner (Paper I), by analysing the stellar and gas kinematics and the stellar archaeology in optical and near-infrared data cubes. The high spatial resolution of the Gemini Multi-Object Spectrograph (GMOS) data cube allowed the detection, using spectral synthesis methods, of an inner circumnuclear ring, with a radius of similar to 1 arcsec, composed of similar to 10(9)-yr stellar populations. Such a ring is located between the nucleus and the circumnuclear ring composed by H II regions detected in previous works. Besides that, there is a stellar rotation around the nucleus and the rings follow the same direction of rotation with different velocities. The intensity-weighted average stellar velocity dispersion at the centre is 92 +/- 3 km s(-1). Three distinct gas outflow components were detected. The direction of the outflow observed with the H alpha emission line is compatible with the direction of the previously observed radio jet. The direction of one of the outflows detected in the {[}O III]lambda 5007 emission coincides with the axis of the ionization cone. There is no difference regarding the stellar populations and the stellar kinematics along the double stellar emission, probably separated by a dust lane as mentioned in Paper I, confirming that they are part of the same structure. (AU)

• Processo FAPESP: 11/51680-6 - Explorando o universo: da formação de galáxias aos planetas tipo-Terra, com o Telescópio Gigante Magellan
• Beneficiário: Laerte Sodré Junior
• Modalidade de apoio: Auxílio à Pesquisa - Projetos Especiais