A treatment procedure for VLT/SINFONI data cubes: application to NGC 5643

Autor(es)

Menezes, R. B. ^[1] ; da Silva, Patricia ^[1] ; Ricci, T. V. ^[1] ; Steiner, J. E. ^[1] ; May, D. ^[1] ; Borges, B. W. ^[2]

Afiliação do(s) autor(es)

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

^[2] Univ Fed Santa Catarina, BR-88905120 Ararangua, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Monthly Notices of the Royal Astronomical Society; v. 450, n. 1, p. 369-396, JUN 11 2015.
• Citações Web of Science: 25

Resumo

In this second paper of a series, we present a treatment procedure for data cubes obtained with the Spectrograph for Integral Field Observations in the Near Infrared of the Very Large Telescope. We verified that the treatment procedure improves significantly the quality of the images of the data cubes, allowing a more detailed analysis. The images of the Br gamma and H-2 lambda 21 218 emission lines from the treated data cube of the nuclear region of NGC 5643 reveal the existence of ionized and molecular-gas clouds around the nucleus, which cannot be seen clearly in the images from the non-treated data cube of this galaxy. The ionized-gas clouds represent the narrow-line region, in the form of a bicone. We observe a good correspondence between the positions of the ionized-gas clouds in the Br gamma image and in an {[}O III] image, obtained with the Hubble Space Telescope, of the nuclear region of this galaxy convolved with an estimate of the point spread function of the data cube of NGC 5643. The morphologies of the ionized and molecular gas seem to be compatible with the existence of a molecular torus/disc that collimates the active galactic nucleus (AGN) emission. The molecular gas may also flow along this torus/disc, feeding the AGN. This scenario is compatible with the unified model for AGNs. (AU)

• Processo FAPESP: 12/21350-7 - Emissão de baixa ionização nuclear e circum-nuclear em galáxias massivas.
• Beneficiário: Tiago Vecchi Ricci
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 12/02268-8 - Núcleos de galáxias no universo local: buracos negros supermassivos e arqueologia estelar de galáxias de alta e baixa massas
• Beneficiário: Roberto Bertoldo Menezes
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado