Intrincate visibility effects from resolved emission of young stellar objects: The case of MWC158 observed with the VLTI

J. Kluska, F. Malbet, J. P. Berger, B. Lazareff, J. B. Le Bouquin, M. Benisty, F. Menard, C. Pinte, R. Millan-Gabet, W. Traub

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

1 Citation (Scopus)

Abstract

In the course of our VLTI young stellar object PIONIER imaging program, we have identiéd 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 ux 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.

Original languageEnglish
Title of host publicationOptical and Infrared Interferometry III
Number of pages14
DOIs
Publication statusPublished - 1 Dec 2012
Externally publishedYes
EventOptical and Infrared Interferometry III - Amsterdam, Netherlands
Duration: 1 Jul 20126 Jul 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8445
ISSN (Print)0277-786X

Conference

ConferenceOptical and Infrared Interferometry III
CountryNetherlands
CityAmsterdam
Period1/07/126/07/12

Keywords

  • Chromatism
  • Image reconstruction
  • Interferometry
  • MWC 158
  • Young stellar object

Cite this

Kluska, J., Malbet, F., Berger, J. P., Lazareff, B., Le Bouquin, J. B., Benisty, M., Menard, F., Pinte, C., Millan-Gabet, R., & Traub, W. (2012). Intrincate visibility effects from resolved emission of young stellar objects: The case of MWC158 observed with the VLTI. In Optical and Infrared Interferometry III [84450O] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8445). https://doi.org/10.1117/12.925456