Disentangling the Environment of the FU Orionis Candidate HBC 722 with Herschel

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Green, Joel D.
Evans, Neal J., II
Kospal, Agnes
van Kempen, Tim A.
Herczeg, Gregory
Quanz, Sascha P.
Henning, Thomas
Lee, Jeong-Eun
Dunham, Michael M.
Meeus, Gwendolyn

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We analyze the submillimeter emission surrounding the new FU Orionis-type object, HBC 722. We present the first epoch of observations of the active environs of HBC 722, with imaging and spectroscopy from PACS, SPIRE, and HIFI on board the Herschel Space Observatory, as well as CO J = 2-1 and 350 mu m imaging (SHARC-II) with the Caltech Submillimeter Observatory. The primary source of submillimeter continuum emission in the region-2MASS 20581767+4353310-is located 16 '' south-southeast of the optical flaring source while the optical and near-infrared emission is dominated by HBC 722. A bipolar outflow extends over HBC 722; the most likely driver is the submillimeter source. We detect warm (100 K) and hot (246 K) CO emission in the surrounding region, evidence of outflow-driven heating in the vicinity. The region around HBC 722 itself shows little evidence of heating driven by the new outbursting source itself.



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Green, Joel D., Neal J. Evans II, Ágnes Kóspál, Tim A. Van Kempen, Gregory Herczeg, Sascha P. Quanz, Thomas Henning et al. "Disentangling the environment of the FU Orionis candidate HBC 722 with Herschel." The Astrophysical Journal Letters, Vol. 731, No. 2 (Apr., 2011): L25.