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Proceedings Paper

New insights into the nature of the circumstellar environment of FU Ori
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Paper Abstract

Following a previous successful study, we present new and more complete interferometric observations of FU Orionis. The combination of both IOTA (Infrared and Optical Telescope Array, Mt. Hopkins, AZ) and PTI (Palomar Testbed Interferometer, Palomar Observatory, CA) interferometers allowed an increase in (u, v) coverage and H and K bands measurements. We confirm the presence of a resolved structure around FU Ori that can be interpreted in terms of accretion disk. However, we find significant differences between our results and standard accretion disks models. In particular the temperature power law is best explained if two different radial regimes are used. Moreover, a clear visibility oscillation trend at 110 m is well fitted with a binary (or hot spot) model. This may have important implications on accretion disk models for such objects.

Paper Details

Date Published: 5 July 2000
PDF: 8 pages
Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); doi: 10.1117/12.390259
Show Author Affiliations
Jean-Philippe Berger, Ecole nationale superieure d'electronique et de radioelectricite de Grenoble and Observato (United States)
Fabien Malbet, Observatoire de Grenoble (France)
M. Mark Colavita, Jet Propulsion Lab. (United States)
Damien Segransan, Observatoire de Grenoble (Switzerland)
Rafael Millan-Gabet, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Wesley A. Traub, Harvard-Smithsonian Ctr. for Astrophysics (United States)

Published in SPIE Proceedings Vol. 4006:
Interferometry in Optical Astronomy
Pierre J. Lena; Andreas Quirrenbach, Editor(s)

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