SIMBAD references

2003A&A...405L..33V - Astronomy and Astrophysics, volume 405, L33-36 (2003/7-3)

Discovery of a dust cloud next to σ Orionis.


Abstract (from CDS):

We report on the discovery of a mid-infrared source at a projected distance of only 1200-AU from the O9.5V star σ Orionis. The spatially resolved, fan-shaped morphology and the presence of an ionization front, as well as evidence in the spectrum for processed dust grains, all suggest that it is a proto-planetary disk being dispersed by the intense ultraviolet radiation from σOrionis. We compute the mass budget and the photo-evaporation timescale, and discuss the possible nature of this remarkable object.

Abstract Copyright:

Journal keyword(s): circumstellar matter - stars: formation - stars: individual: σ Orionis (HD 37468) - systems: protoplanetary disks - infrared: stars planetary

Nomenclature: NAME SIG ORI IRS 1

Simbad objects: 11

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