FU Orionis eruptions.

Details FU Orionis eruptions. FU Orionis eruptions.

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esoc...33..233h&link_type=abstract

ESO Workshop on Low Mass Star Formation and Pre-Main Sequence Objects, p. 233 - 246

Physics

111

Fu Orionis Stars: Outbursts, Fu Orionis Stars: Mass Loss, Fu Orionis Stars: Accretion Disks, Fu Orionis Stars: Circumstellar Matter, Fu Orionis Stars: Line Profiles

Scientific paper

Five stars are known whose spectra and photometric behavior identify them as classic FUors, although there are real differences in rise time (from 1 to more than 10 years) and in spectroscopic details. There is reason to suspect that FUor eruptions are most likely in stars having strong mass outflows. A central issue is whether the optical spectra of FUors are produced by a self-luminous accretion disk or by a peculiar, rapidly-rotating central star with a deep semi-transparent atmosphere plus cicumstellar material. A variety of evidence bearing upon this issue is discussed, and it is concluded (1) that the disk interpretation at the very least requires considerable elaboration to account for the observations, and (2) that alternative models cannot be excluded.

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