GGD 37: An Extreme Protostellar Outflow

Authors :: Green, J. D.
Watson, D. M.
Bergin, E.
Maret, S.
Melnick, G.
Sonnentrucker, P.
Tolls, V.
Sargent, B. A.
Forrest, W. J.
Kim, K. H.
Raines, S. N.
Publication Year :: 2010
Abstract: We present the first Spitzer-IRS spectral maps of the Herbig-Haro flow GGD 37 detected in lines of [Ne III], [O IV], [Ar III], and [Ne V]. The detection of extended [O IV] (55 eV) and some extended emission in [Ne V] (97 eV) indicates a shock temperature in excess of 100,000 K, in agreement with X-ray observations, and a shock speed in excess of 200 km s-1. The presence of an extended pho- toionization or collisional ionization region indicates that GGD 37 is a highly unusual protostellar outflow.<br />Comment: 5 pages, 4 figures, accepted 17 Nov. 2010