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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Menezes, R. B. [1] ; da Silva, Patricia [1] ; Ricci, T. V. [1] ; Steiner, J. E. [1] ; May, D. [1] ; Borges, B. W. [2]
Total Authors: 6
Affiliation:
[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
Total Affiliations: 2
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 450, n. 1, p. 369-396, JUN 11 2015.
Web of Science Citations: 25
Abstract

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)

FAPESP's process: 12/02268-8 - Galactic nuclei in the local universe: supermassive black holes and stellar archeology of galaxies of high and low masses
Grantee:Roberto Bertoldo Menezes
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 12/21350-7 - Nuclear and circumnuclear low ionization emission in massive galaxies.
Grantee:Tiago Vecchi Ricci
Support type: Scholarships in Brazil - Post-Doctorate