Proper motions of Herbig-Haro objects. VIII - The region of NGC 2068
1987; Institute of Physics; Volume: 94; Linguagem: Inglês
10.1086/114562
ISSN1538-3881
AutoresB. F. Jones, Martin Cohen, P. A. Wehinger, T. Gehren,
Tópico(s)Astronomical Observations and Instrumentation
ResumoThe authors have determined proper motions and have obtained long-slit low-resolution spectroscopy for many of the Herbig-Haro (HH) objects in the region of NGC 2068. The HH 24 complex alone contains two dynamically distinct bipolar "jets". The authors believe there are three exciting stars in this region, two within the bounds of HH 24: one (SSV 63) is responsible for HH 24 knots CEA and the objects HH 19 and HH 20 to the northwest of HH 24, and possibly for HH 27 to the south; a second for HH 24 knots G1 - G3 and probably for HH 23. A third star (probably SSV 59) is responsible for HH 25 and HH 26, which also define a bipolar flow. The proper motions and radial velocities suggest that objects have undergone both acceleration in the vicinity of the exciting stars, and deceleration a parsec away.
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