2000A&AS..144..523C


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.07CEST22:20:34

2000A&AS..144..523C - Astron. Astrophys., Suppl. Ser., 144, 523-532 (2000/June-2)

Adaptive optics imaging of P Cygni in Hα.

CHESNEAU O., ROCHE M., BOCCALETTI A., ABE L., MOUTOU C., CHARBONNIER F., AIME C., LANTERI H. and VAKILI F.

Abstract (from CDS):

We obtained Hα diffraction limited data of the LBV star P Cyg using the ONERA Adaptive Optics (AO) facility BOA at the OHP 1.52 m 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.

Abstract Copyright:

Journal keyword(s): star: individual: P Cyg - stars: winds, imaging, circumstellar matter - instrumentation: adaptive optics

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * P Cyg s*b 20 17 47.2020844 +38 01 58.552724 4.66 5.24 4.82 4.28 4.02 B1-2Ia-0ep 1141 1
2 * f01 Cyg Be* 20 59 49.5516391039 +47 31 15.378902421 3.77 4.71 4.75 4.62 4.63 B1.5Vnne 471 0

    Equat.    Gal    SGal    Ecl

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2021.05.07-22:20:34

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