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Proceedings Paper

Intrincate visibility effects from resolved emission of young stellar objects: the case of MWC158 observed with the VLTI
Author(s): J. Kluska; F. Malbet; J.-P. Berger; B. Lazareff; J.-B. Le Bouquin; M. Benisty; F. Menard; C. Pinte; R. Millan-Gabet; W. Traub
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Paper Abstract

In the course of our VLTI young stellar object PIONIER imaging program, we have identified a strong visibility chromatic dependency that appeared in certain sources. This effect, rising value of visibilities with decreasing wavelengths over one base, is also present in previous published and archival AMBER data. For Herbig AeBe stars, the H band is generally located at the transition between the star and the disk predominance in flux for Herbig AeBe stars. We believe that this phenomenon is responsible for the visibility rise effect. We present a method to correct the visibilities from this effect in order to allow "gray" image reconstruction software, like Mira, to be used. In parallel we probe the interest of carrying an image reconstruction in each spectral channel and then combine them to obtain the final broadband one. As an illustration we apply these imaging methods to MWC158, a (possibly Herbig) B[e] star intensively observed with PIONIER. Finally, we compare our result with a parametric model fitted onto the data.

Paper Details

Date Published: 12 September 2012
PDF: 14 pages
Proc. SPIE 8445, Optical and Infrared Interferometry III, 84450O (12 September 2012); doi: 10.1117/12.925456
Show Author Affiliations
J. Kluska, Institut de Planétologie et d'Astrophysique de Grenoble (France)
F. Malbet, Institut de Planétologie et d'Astrophysique de Grenoble (France)
J.-P. Berger, Institut de Planétologie et d'Astrophysique de Grenoble (France)
European Southern Observatory (Chile)
B. Lazareff, Institut de Planétologie et d'Astrophysique de Grenoble (France)
J.-B. Le Bouquin, Institut de Planétologie et d'Astrophysique de Grenoble (France)
M. Benisty, Institut de Planétologie et d'Astrophysique de Grenoble (France)
F. Menard, Institut de Planétologie et d'Astrophysique de Grenoble (France)
C. Pinte, Institut de Planétologie et d'Astrophysique de Grenoble (France)
R. Millan-Gabet, California Institute of Technology (United States)
W. Traub, Jet Propulsion Lab. (United States)


Published in SPIE Proceedings Vol. 8445:
Optical and Infrared Interferometry III
Françoise Delplancke; Jayadev K. Rajagopal; Fabien Malbet, Editor(s)

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