The envelope of IRC+10216 reflecting the galactic light: UBV surface brightness photometry and interpretation

Details The envelope of IRC+10216 reflecting the galactic light: UBV surface brightness photometry and interpretation The envelope of IRC+10216 reflecting the galactic light: UBV surface brightness photometry and interpretation

2003-04-11

arxiv.org/abs/astro-ph/0304220v1

Astron.Astrophys. 401 (2003) 985-996

Astronomy and Astrophysics

Astrophysics

accepted by AA

Scientific paper

10.1051/0004-6361:20030127

We present and analyse new optical images of the dust envelope surrounding the high mass-loss carbon star IRC+10216. This envelope is seen due to external illumination by galactic light. Intensity profiles and colors of the nebula were obtained in the UBV bandpasses. The data are compared with the results of a radiative transfer model calculating multiple scattering of interstellar field photons by dust grains with a single radius. The data show that the observed radial shape of the nebula, especially its half maximum radius, does not depend on wavelength (within experimental errors), suggesting that grains scatter in the grey regime, etc, etc (this abstract has been shortened)

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