Detection of a Disk Surrounding the Variably Accreting Young Star HBC722

TL;DR

This paper reports the first millimeter detection of the young star HBC722, measuring its disk mass and discussing how this relates to its accretion burst mechanism.

Contribution

First millimeter detection of HBC722, enabling estimation of its disk mass and insights into the burst triggering process.

Findings

Detected HBC722 at 233 GHz for the first time.

Estimated disk mass of 0.024 solar masses.

Discussed implications for accretion burst mechanisms.

Abstract

We present new ALMA 233 GHz continuum observations of the FU Orionis Object HBC722. With these data we detect HBC722 at millimeter wavelengths for the first time, use this detection to calculate a circumstellar disk mass of 0.024 solar masses, and discuss implications for the burst triggering mechanism.