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Science case for 1 mas spectra-imaging in the near-infrared

Garcia, Paulo J. V. and Mawet, Dimitri (2008) Science case for 1 mas spectra-imaging in the near-infrared. In: Optical and Infrared Interferometry. Proceedings of SPIE. No.7013. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 70134N. ISBN 9780819472236.

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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.

Item Type:Book Section
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Mawet, Dimitri0000-0002-8895-4735
Additional Information:© 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). July 14, 2008. MEF, PJVG and SA were supported in part by the FCT through projects PTDC/CTE-AST/68915/2006 and PTDC/CTE-ST/65971/2006 from POCI, with funds from the European programme FEDER. MEF is supported by the FCT through the research grant SFRH/BPD/36141/2007. BA was partly supported by FWF project P19503. This work was partially supported by the EU FP6 under contract number RII3-Ct-2004-001566 (OPTICON), by an ESQ grant and by ISSI and DAAD/EGIDE grants. This manuscript used the SPIE Tb.TEX template developed by Ken Hanson (LANL).
Funding AgencyGrant Number
Fundação para a Ciência e a Tecnologia (FCT)PTDC/CTE-AST/68915/2006
Fundação para a Ciência e a Tecnologia (FCT)PTDC/CTE-ST/65971/2006
Fundação para a Ciência e a Tecnologia (FCT)SFRH/BPD/36141/2007
Fundação para a Ciência e a Tecnologia (FCT)P19503
EU FP6RII3-Ct-2004-001566 (OPTICON)
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Subject Keywords:optical interferometry, imaging, spectroscopy, circumstellar disks, debris disks, exoplanets, winds, jets, active galactic nuclei, microlensing.
Series Name:Proceedings of SPIE
Issue or Number:7013
Record Number:CaltechAUTHORS:20150527-082739581
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Official Citation:Paulo J. V. Garcia ; Jean-Philippe Berger ; Alessandro Marconi ; Alexander Krivov ; Andrea Chiavassa, et al. "Science case for 1 mas spectro-imagining in the near-infrared", Proc. SPIE 7013, Optical and Infrared Interferometry, 70134N (July 14, 2008); doi:10.1117/12.789216
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57843
Deposited On:27 May 2015 18:21
Last Modified:10 Nov 2021 21:56

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