PROPER MOTIONS OF THE HH 110/270 SYSTEM

被引:11
作者
Kajdic, P. [1 ,2 ]
Reipurth, B. [3 ]
Raga, A. C. [4 ]
Bally, J. [5 ]
Walawender, J. [3 ,6 ]
机构
[1] Univ Nacl Autonoma Mexico, Inst Astron, Mexico City, DF, Mexico
[2] Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City, DF, Mexico
[3] Univ Hawaii Manoa, Inst Astron, Hilo, HI 96720 USA
[4] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City, DF, Mexico
[5] Univ Colorado, CASA, Boulder, CO 80309 USA
[6] Univ Hawaii Hilo, Dept Phys & Astron, Hilo, HI 96720 USA
基金
美国国家航空航天局;
关键词
Herbig-Haro objects; ISM: individual objects (HH 110; HH; 270); ISM: jets and outflows; stars: formation; HERBIG-HARO OBJECTS; RADIATIVELY COOLING JETS; HH-110; JET; NUMERICAL SIMULATIONS; CLOUD CORE; COLLISION; OUTFLOWS; SPECTROSCOPY; STABILITY; VELOCITY;
D O I
10.1088/0004-6256/143/5/106
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present a study of the HH 110/270 system based on three sets of optical images obtained with the ESO New Technology Telescope, the Subaru Telescope, and the Hubble Space Telescope (HST). The ground-based observations are made in the H alpha and [S II] emission lines and the HST observations are made in the H alpha line only. Ground-based observations reveal the existence of nine knots, which have not been previously discussed and offer some important insight into the HH 110/270 history. We perform a kinematic study of the HH 110/270 system and an analysis of its emission properties. We measure proper motions of all the knots in the system. Four of the newly identified knots belong to the HH 270 jet. Their positions indicate that the jet's axis changed its direction in the past. We speculate that similar changes may have occurred many times in the past and this could be part of the reason for the unusual structure of the HH 110 jet. The HST observations allow us to resolve individual knots into their substructures and to measure their proper motions. These measurements show that the knots are highly turbulent structures. Finally, we report the discovery of four new Herbig-Haro (HH) objects located near the HH 110/270 system.
引用
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页数:14
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