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Proceedings Paper

Science case for 1 mas spectro-imagining in the near-infrared
Author(s): Paulo J. V. Garcia; Jean-Philippe Berger; Alessandro Marconi; Alexander Krivov; Andrea Chiavassa; Bernard Aringer; Brunella Nisini; Denis Defrére; Dimitri Mawet; Dieter Schertl; Eric Tatuli; Eric Thiébaut; Fabien Baron; Fabien Malbet; Gaspard Duchéne; Gerd Weigelt; Gilles Duvert; Gilles Henri; Hubert Klahr; Jean Surdej; Jean-Charles Augereau; Jean-François Claeskens; John Young; Josef Hron; Karine Perraut; Karl-Heinz Hofmann; Leonardo Testi; Margarida Cunha; Mercedes Filho; Michaël De Becker; Olivier Absil; Olivier Chesneau; Pierre Collette; Pierre-Olivier Petrucci; Ralph Neuhaeuser; Romano Corradi; Sónia Antón; Sebastian Wolf; Sebastian Hoenig; Stephanie Renard; Thierry Forveille; Thomas Beckert; Thomas Lebzelter; Tim Harries; Virginie Borkowski; Xavier Bonfils
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Paper Abstract

We present the work developed within the science team of the Very Large Telescope Interferometer Spectro-Imager (VSI) during the Phase A studies. VSI aims at delivering ~ 1 milliarcsecond resolution data cubes in the near-infrared, with several spectral resolutions up to 12 000, by combining up to 8 VLTI telescopes. In the design of an instrument, the science case plays a central role by supporting the instrument construction decision, defining the top-level requirements and balancing design options. The overall science philosophy of VSI was that of a general user instrument serving a broad community. The science team addressed themes which included several areas of astrophysics and illustrated specific modes of operation of the instrument: a) YSO disks and winds; b) Multiplicity of young stars; c) Exoplanets; d) Debris disks; e) Stellar surface imaging; f) The environments of evolved stars; g) AGN tori; h) AGN's Broad Line Region; i) Supermassive black-holes; and j) Microlensing. The main conclusions can be summarized as follows: a) The accessible targets and related science are extremely sensitive to the instrument limiting magnitude; the instrument should be optimized for sensitivity and have its own fringe tracker. b) Most of the science cases are readily achievable with on-axis fringe tracking, off-axis fringe tracking enabling extra science. c) In most targets (YSOs, evolved stars and AGNs), the interpretation and analysis of circumstellar/nuclear dust morphology requires direct access to the gas via spectral resolved studies of emission lines, requiring at least a spectral resolution of 2 500. d) To routinely deliver images at the required sensitivity, the number of telescopes in determinant, with 6 telescopes being favored. e) The factorial increase in the number of closure phases and visibilities, gained in a single observation, makes massive surveys of parameters and related science for the first time possible. f) High dynamic range imaging and very high dynamic range differential closure phase are possible allowing the study of debris disks and characterization of pegasides. g) Spectro-imaging in the near-infrared is highly complementary to ALMA, adaptive optics and interferometric imaging in the thermal infrared.

Paper Details

Date Published: 28 July 2008
PDF: 14 pages
Proc. SPIE 7013, Optical and Infrared Interferometry, 70134N (28 July 2008); doi: 10.1117/12.789216
Show Author Affiliations
Paulo J. V. Garcia, Univ. do Porto (Portugal)
Ctr. de Astrofísica, Univ. do Porto (Portugal)
Jean-Philippe Berger, Univ. J. Fourier, CNRS, Lab. d'Astrophysique de Grenoble (France)
Alessandro Marconi, Univ. di Firenze (Italy)
Alexander Krivov, Astrophysical Institute and Univ. Observatory (Germany)
Andrea Chiavassa, Groupe de Recherche en Astronomie et Astrophysique du Languedoc (France)
Bernard Aringer, Univ. of Vienna (Austria)
Brunella Nisini, INAF - Osservatorio Astronomico di Roma (Italy)
Denis Defrére, Institut d'Astrophysique et Géophysique, Univ. de Liège (Belgium)
Dimitri Mawet, Institut d'Astrophysique et Géophysique, Univ. de Liège (Belgium)
Dieter Schertl, Max-Planck Institute for Radioastronomy (Germany)
Eric Tatuli, INAF - Osservatorio di Astrofisica di Arcetri (Italy)
Eric Thiébaut, Observatoire de Lyon, CRAL (France)
Fabien Baron, Cavendish Lab., Univ. of Cambridge (United Kingdom)
Fabien Malbet, Univ. J. Fourier, CNRS, Lab. d'Astrophysique de Grenoble (France)
Gaspard Duchéne, Univ. J. Fourier, CNRS, Lab. d'Astrophysique de Grenoble (France)
Gerd Weigelt, Max-Planck Institute for Radioastronomy (Germany)
Gilles Duvert, Jean-Marie Mariotti Ctr., CNRS (France)
Gilles Henri, Univ. J. Fourier, CNRS, Lab. d'Astrophysique de Grenoble (France)
Hubert Klahr, Max Planck Institute for Astronomy (Germany)
Jean Surdej, Institut d'Astrophysique et Géophysique, Univ. de Liège (Belgium)
Jean-Charles Augereau, Univ. J. Fourier, CNRS, Lab. d'Astrophysique de Grenoble (France)
Jean-François Claeskens, Institut d'Astrophysique et Géophysique, Univ. de Liège (Belgium)
John Young, Cavendish Lab., Univ. of Cambridge (United Kingdom)
Josef Hron, Univ. of Vienna (Austria)
Karine Perraut, Univ. J. Fourier, CNRS, Lab. d'Astrophysique de Grenoble (France)
Karl-Heinz Hofmann, Max-Planck Institute for Radioastronomy (Germany)
Leonardo Testi, INAF - Osservatorio di Astrofisica di Arcetri (Italy)
Margarida Cunha, Ctr. de Astrofísica, Univ. do Porto (Portugal)
Mercedes Filho, Ctr. de Astrofísica, Univ. do Porto (Portugal)
Michaël De Becker, Institut d'Astrophysique et Géophysique, Univ. de Liège (Belgium)
Olivier Absil, Univ. J. Fourier, CNRS, Lab. d'Astrophysique de Grenoble (France)
Olivier Chesneau, Jean-Marie Mariotti Ctr., CNRS (France)
Pierre Collette, Institut d'Astrophysique et Géophysique, Univ. de Liège (Belgium)
Pierre-Olivier Petrucci, Univ. J. Fourier, CNRS, Lab. d'Astrophysique de Grenoble (France)
Ralph Neuhaeuser, Astrophysical Institute and Univ. Observatory (Germany)
Romano Corradi, Isaac Newton Group of Telescopes (Spain)
Instituto de Astrofísica de Canarias (Spain)
Sónia Antón, Univ. de Lisboa (Portugal)
Sebastian Wolf, Max Planck Institute for Astronomy (Germany)
Sebastian Hoenig, Max-Planck Institute for Radioastronomy (Germany)
Stephanie Renard, Univ. J. Fourier, CNRS, Lab. d'Astrophysique de Grenoble (France)
Thierry Forveille, Canada-France-Hawaii Telescope Corp. (United States)
Thomas Beckert, Max-Planck Institute for Radioastronomy (Germany)
Thomas Lebzelter, Univ. of Vienna (Austria)
Tim Harries, Univ. of Exeter (United Kingdom)
Virginie Borkowski, Institut d'Astrophysique et Géophysique, Univ. de Liège (Belgium)
Xavier Bonfils, Ctr. de Astronomia e Astrofísica da Univ. de Lisboa (Portugal)
Ctr. de Astrofísica, Univ. do Porto (Portugal)


Published in SPIE Proceedings Vol. 7013:
Optical and Infrared Interferometry
Markus Schöller; William C. Danchi; Françoise Delplancke, Editor(s)

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