Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-20T01:38:42.322Z Has data issue: false hasContentIssue false
  • English
  • Français

Signs of rotating equatorial density enhancements around SRb pulsators

Published online by Cambridge University Press:  30 December 2019

W. Homan Open the ORCID record for W. Homan [Opens in a new window] ,
L. Decin ,
A. Richards  and
P. Kervella Open the ORCID record for P. Kervella [Opens in a new window]
W. Homan
Affiliation:
IvS, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium email: [email protected]
L. Decin
Affiliation:
IvS, KU Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium email: [email protected] University of Leeds, School of Chemistry, Leeds LS2 9JT, United Kingdom
A. Richards
Affiliation:
JBCA, Dept. Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK
P. Kervella
Affiliation:
LESIA (CNRS UMR 8109), Obs. de Paris, PSL, CNRS, UPMC, Univ. Paris-Diderot, France
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We observed the circumstellar environments (CSEs) of the semiregular AGB stars L2 Puppis, R Doradus and EP Aquarii with ALMA. (1) The molecular emission in the L2 Pup nebula reveals an edge-on rotating disk. (2) PV diagrams of the 28SiO emission in the inner CSE of R Dor expose a pattern pointing to an inclined rotating disk. (3) The CO emission in the CSE of EP Aqr reveals a nearly face-on equatorial density enhancement (EDE). The inner EDE strongly resembles theoretical wind-Roche-lobe-overflow models. The SiO emission points to a potential companion. The combination of (1), (2) and (3) suggests that a link may exist between the type of AGB pulsations and the morphological nature of the CSE.

Keywords

stars: AGB and post-AGB starscircumstellar materialstars: mass lossstars: imagingsubmillimeter
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S343: Why Galaxies Care About AGB Stars: A Continuing Challenge through Cosmic Time , August 2018 , pp. 421 - 422
Copyright
© International Astronomical Union 2019 

References

Mastrodemos, N., & Morris, M. 1999, ApJ, 523, 357 10.1086/307717CrossRefGoogle Scholar
Raghavan, D., McAlister, H. A., Henry, T. J, Latham, D. W., et al. 2010, ApJS, 190, 1 10.1088/0067-0049/190/1/1CrossRefGoogle Scholar
Cassan, A., Kubas, D., Beaulieu, J.-P., Dominik, M., Horne, K., et al. 2012, Nature, 481, 167 10.1038/nature10684CrossRefGoogle Scholar
Homan, W., Richards, A., Decin, L., Kervella, P., de Koter, A., et al. 2017, A&A, 601A, 5H Google Scholar
Kervella, P., Homan, W., Richards, A., Decin, L., McDonald, I., et al. 2016, A&A, 596A, 92K Google Scholar
Brinch, C., & Hogerheijde, M. 2010, A&A, 523A, 25B Google Scholar
Homan, W., Danilovich, T., Decin, L., de Koter, A., Nuth, J., et al. 2018, A&A, 614A, 113H Google Scholar
Decin, L., Rochards, A., Danilovich, T., Homan, W., & Nuth, J. 2018, A&A, 615A, 28D Google Scholar
Homan, W., Richards, A., Decin, L., de Koter, A., & Kervella, P. 2018, A&A, 616A, 34H Google Scholar