Revealing The Millimeter Environment of the New FU Orionis Candidate HBC722 with the Submillimeter Array

Abstract

We present 230 GHz Submillimeter Array continuum and molecular line observations of the newly discovered FUor candidate HBC722. We report the detection of seven 1.3 mm continuum sources in the vicinity of HBC722, none of which correspond to HBC722 itself. We compile infrared and submillimeter continuum photometry of each source from previous studies and conclude that three are Class 0 embedded protostars, one is a Class I embedded protostar, one is a Class I/II transition object, and two are either starless cores or very young, very low luminosity protostars or first hydrostatic cores. We detect a northwest-southeast outflow, consistent with the previous detection of such an outflow in low-resolution, single-dish observations, and note that its axis may be precessing. We show that this outflow is centered on and driven by one of the nearby Class 0 sources rather than HBC722, and find no conclusive evidence that HBC722 itself is driving an outflow. The non-detection of HBC722 in the 1.3 mm continuum observations suggests an upper limit of 0.02 solar masses for the mass of the circumstellar disk. This limit is consistent with typical T Tauri disks and with a disk that provides sufficient mass to power the burst.

12 pages, 7 figures, accepted by ApJ

References in corpus (5)

• MAMBO Mapping of Spitzer c2d Small Clouds and Cores
• Identifying the Low Luminosity Population of Embedded Protostars in the c2d Observations of Clouds and Cores
• The Hot Inner Disk of FU Ori
• The Differential Rotation of FU Ori
• Optical photometric and spectral study of the new FU Orionis object V2493 Cyg (HBC 722)

Cited by in corpus (19)

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• An Analysis of the Environments of FU Orionis Objects with Herschel
• Multi-wavelength study of the low-luminosity outbursting young star HBC 722
• A 1.3 mm SMA Survey of 29 Variable Young Stellar Objects
• A concordant scenario to explain FU Ori from deep centimeter and millimeter interferometric observations
• Mass transport from the envelope to the disk of V346 Nor: a case study for the luminosity problem in an FUor-type young eruptive star
• Variability at the Edge: Optical Near/IR Rapid Cadence Monitoring of Newly Outbursting FU Orionis Object HBC 722
• Interferometric view of the circumstellar envelopes of northern FU Orionis-type stars
• Outflows, Dusty Cores, and a Burst of Star Formation in the North America and Pelican Nebulae
• High Resolution Optical and NIR Spectra of HBC 722
• X-ray emission from an FU Ori star in early outburst: HBC 722
• High-resolution spectroscopic monitoring observations of FU Orionis-type object, V960 Mon
• Searching for Molecular Outflows with Support Vector Machines: Dark Cloud Complex in Cygnus
• Absence of Significant Cool Disks in Young Stellar Objects Exhibiting Repetitive Optical Outbursts
• X-ray survey of the North-America and Pelican star-forming complex (NGC7000/IC5070)
• The FUor star V2493 Cyg (HBC 722) -- eleven years at maximum brightness
• A Study of Millimeter Variability in FUor Objects