Captured at Millimeter Wavelengths: a Flare from the Classical T Tauri Star DQ Tau

TL;DR

This paper reports the first observed millimeter flare from a classical T Tauri star, DQ Tau, highlighting its potential link to binary orbital dynamics and emphasizing the need for multi-wavelength follow-up studies.

Contribution

It presents the first millimeter flare observation from a classical T Tauri star and discusses its implications for understanding flare mechanisms in binary star systems.

Findings

Detected a rare millimeter flare from DQ Tau

Flare likely linked to binary orbital motion

Highlights importance of multi-wavelength observations

Abstract

For several hours on 2008 April 19 the T Tauri spectroscopic binary DQ Tau was observed to brighten, reaching a maximum detected flux of 468 mJy and likely making it (briefly) the brightest object at 3 mm in the Taurus star-forming region. We present the light curve of a rarely before observed millimeter flare originating in the region around a pre-main-sequence star, and the first from a classical T Tauri star. We discuss the properties and nature of the flaring behavior in the context of pulsed accretion flows (the current picture based largely on studies of this object's optically variable spectrum), as well as magnetospheric re-connection models (a separate theory that predicts millimeter flares for close binaries of high orbital eccentricity). We believe that the flare mechanism is linked to the binary orbit, and therefore periodic. DQ Tau makes a strong case for multi-wavelength follow-up studies, performed in parallel, of future flares to help determine whether magnetospheric and dynamical interactions in a proto-binary system are independent.