Exploring the water and carbon monoxide shell around Betelgeuse with VLTI/AMBER

M. Montargès, P. Kervella, G. Perrin, K. Ohnaka

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

2 Citations (Scopus)

Abstract

We present the results of the analysis of our recent inter-ferometric observations of Betelgeuse, using the AMBER instrument of the VLTI. Using the medium spectral resolution mode (R ∼ 1500) we detected the presence of the water vapour and carbon monoxide (CO) molecules in the H and K bands. We also derived the photo-spheric angular diameter in the continuum. By analysing the depth of the molecular lines and the interferometric visibilities, we derived the column densities of the molecules, as well as the temperature and the size of the corresponding regions in the atmosphere of Betelgeuse (the MOLsphere) using a single shell model around the photosphere. Our results confirm the findings by Perrin et al. (2004) and Ohnaka et al. (2011) that the H 2O and CO molecules are distributed around Betelgeuse in a MOLsphere extending to approximately 1.3 times the star's photospheric radius.

Original languageEnglish
Title of host publicationBetelgeuse Workshop 2012 - The Physics of Red Supergiants
Subtitle of host publicationRecent Advances and Open Questions
Pages167-172
Number of pages6
DOIs
Publication statusPublished - 2013
Externally publishedYes
EventBetelgeuse Workshop 2012 - The Physics of Red Supergiants: Recent Advances and Open Questions - Paris, France
Duration: 26 Nov 201229 Nov 2012

Publication series

NameEAS Publications Series
Volume60
ISSN (Print)1633-4760
ISSN (Electronic)1638-1963

Conference

ConferenceBetelgeuse Workshop 2012 - The Physics of Red Supergiants: Recent Advances and Open Questions
Country/TerritoryFrance
CityParis
Period26/11/1229/11/12

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Engineering(all)
  • Space and Planetary Science

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