Adaptive optics imaging of P Cygni in Halpha
Abstract
We obtained Halpha diffraction limited data of the LBV star P Cyg using the ONERA Adaptive Optics (AO) facility BOA at the OHP 1.52m telescope on October 1997. Taking P Cyg and the reference star 59 Cyg AO long exposures we find that P Cyg clearly exhibits a large and diffuse intensity distribution compared to the 59 Cyg's point-like source. A deconvolution of P Cyg using 59 Cyg as the Point Spread Function was performed by means of the Richardson-Lucy algorithm. P Cyg clearly appears as an unresolved star surrounded by a clumped envelope. The reconstructed image of P Cyg is compared to similar spatial resolution maps obtained from radio aperture synthesis imaging. We put independent constraints on the physics of P Cyg which agree well with radio results. We discuss future possibilities to constrain the wind structure of P Cyg by using multi-resolution imaging, coronagraphy and long baseline interferometry to trace back its evolutionary status.
Cite
@article{arxiv.astro-ph/0009198,
title = {Adaptive optics imaging of P Cygni in Halpha},
author = {O. Chesneau and M. Roche and A. Boccaletti and L. Abe and C. Moutou and F. Charbonnier and C. Aime and H. Lanteri and F. Vakili},
journal= {arXiv preprint arXiv:astro-ph/0009198},
year = {2009}
}
Comments
10 pages, 19 Encapsulated Postscript figures