| Issue |
EAS Publications Series
Volume 71-72, 2015
The Physics of Evolved Stars: A Conference Dedicated to the Memory of Olivier Chesneau
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|
|---|---|---|
| Page(s) | 289 - 291 | |
| Section | Circumstellar Environments | |
| DOI | https://doi.org/10.1051/eas/1571065 | |
| Published online | 01 December 2015 | |
E. Lagadec, F. Millour and T. Lanz (eds)
EAS Publications Series, 71–72 (2015) 289-291
On the Inner Circumstellar Envelopes of R Coronae Borealis Stars
1 Universidade Federal do Rio Grande do Norte, Natal-RN, Brazil
2 Space Telescope Science Institute, Baltimore, USA
3 Observatoire de la Côte d*Azur, Grasse, France
We present different analyses of Very Large Telescope Interferometer (VLTI) data to interpret the inner circumstellar envelope (CSE) morphology of R Coronae Borealis (RCB) stars. Three objects were considered: RY Sgr, V CrA, and V854 Cen. Chi-squared maps of different geometrical models allow to identify a reasonable description of these CSEs, which can be further studied in radiative transfer codes. Overall, the inner CSE morphology of these RCB stars are consistent with a central star surrounded by a dusty shell with at least a bright clump (or a dust cluster).
© EAS, EDP Sciences, 2015