Detection of a Radio Flare at Millimeter-Wavelengths from the X-ray T Tauri Star V773 Tau

Details Detection of a Radio Flare at Millimeter-Wavelengths from the X-ray T Tauri Star V773 Tau Detection of a Radio Flare at Millimeter-Wavelengths from the X-ray T Tauri Star V773 Tau

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..402..400u&link_type=abstract

Approaching Micro-Arcsecond Resolution with VSOP-2: Astrophysics and Technologies ASP Conference Series, Vol. 402, proceedings o

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present the results of multi-frequency observations of a radio flare in the young stellar object (YSO) V773 Tau, which is probably a weak-line T Tauri star. We carried out radio continuum observations at 22 GHz, 43 GHz and 86 GHz, using the Nobeyama 45 m telescope, and detected a radio flare at all frequencies. The radio flare occurred near periastron passage, and the flux density became 4 to 10 times higher, then rapidly decreased at 43 and 86 GHz within a few hours. The radio spectrum was rising (brighter at higher frequency) during the flare. On the other hand, the radio continuum at 22 GHz was detected even 28 hours later at more than 2 mJy. Thus, the active phase is surprisingly long at 22 GHz.. V773 Tau is the most promising target for detailed imaging of the magnetosphere with the next space VLBI project VSOP-2.

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