University of Illinois Urbana-Champaign

Identification of VO (X4β) in the envelope of VY Cma: A new circumstellar molecule

Bernal, Jacob

Content Files
1464330.pptx
3990.pdf

Permalink

https://hdl.handle.net/2142/104414

Description

Title
Identification of VO (X4β) in the envelope of VY Cma: A new circumstellar molecule
Author(s)
Bernal, Jacob
Contributor(s)
  • Humphreys, Roberta M.
  • Ziurys, Lucy M.
Issue Date
2019-06-19
Keyword(s)
Astronomy
Date of Ingest
  • 2019-07-15T22:16:53Z
  • 2020-01-25T19:31:20Z
Abstract
We have confirmed a new circumstellar molecule, VO, observed in the envelope of the supergiant star, VY Canis Majoris, using the Hubble Space Telescope (HST) with its Imaging Spectrograph (STIS). The molecule, a free radical, was detected in two clumps in the ejecta of this star via its B-X electronic transition in the near-infrared. The spectra are clearly circumstellar as the lines are significantly red-shifted from the stellar velocity, and arise from material 40-50 R* from the star. Wallerstein had identified some of the observed lines previously towards VY CMa; our data prove their spatial location. The VO lines are likely excited by resonant scattering from the star through a hole in the dusty shell.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
eng
Permalink
http://hdl.handle.net/2142/104414
DOI
https://doi.org/10.15278/isms.2019.WA03
Copyright and License Information
Copyright 2019 Jacob Bernal

Owning Collections

Abstracts & Presentations - 2019 International Symposium on Molecular Spectroscopy PRIMARY