High angular resolution and young stellar objects: Imaging the surroundings of MWC 158 by optical interferometry

J. Kluska, F. Malbet, J. P. Berger, M. Benisty, B. Lazareff, J. B. Le Bouquin, C. Pinte

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

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.

Original languageEnglish
Title of host publicationNew Concepts in Imaging
Subtitle of host publicationOptical and Statistical Models
Pages141-154
Number of pages14
DOIs
Publication statusPublished - 20 Sep 2013
Externally publishedYes
EventNew Concepts in Imaging: Optical and Statistical Models - Frejus, France
Duration: 20 Jun 201222 Jun 2012

Publication series

NameEAS Publications Series
Volume59
ISSN (Print)1633-4760
ISSN (Electronic)1638-1963

Conference

ConferenceNew Concepts in Imaging: Optical and Statistical Models
CountryFrance
CityFrejus
Period20/06/1222/06/12

Cite this