A Sub-millimeterwave ``Flare'' from GG Tau?

Details A Sub-millimeterwave ``Flare'' from GG Tau? A Sub-millimeterwave ``Flare'' from GG Tau?

1996-07-30

arxiv.org/abs/astro-ph/9607159v1

Astronomy and Astrophysics

Astrophysics

15 pages, AASTex v.4.0 format, four postscript figures, four tables, to appear in The Astrophysical Journal

Scientific paper

10.1086/303474

We have monitored the millimeter and submillimeter emission from the young stellar object GG Tau, a T Tauri binary system surrounded by a massive circumbinary disk. We find that between 1992 and 1994, the flux has increased significantly at 800, 1100, and 1300 microns, resulting in a steepening of the observed spectral energy distribution at those wavelengths. Such an increase appears consistent with a modest increase in disk luminosity (a factor of two). The increase in the effective disk temperature might arise from a slight change in the disk heating processes. Alternatively, the flux increase may reflect a sudden change in the underlying dust optical properties.

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