Hubble Space Telescope WFPC2 imaging of XZ Tauri:: Time evolution of a Herbig-Haro bow shock

被引：39
作者：
Krist, JE
Stapelfeldt, KR
Burrows, CJ
Hester, JJ
Watson, AM
Ballester, GE
Clarke, JT
Crisp, D
Evans, RW
Gallagher, JS
Griffiths, RE
Hoessel, JG
Holtzman, JA
Mould, JR
Scowen, PA
Trauger, JT
机构：
[1] Space Telescope Sci Inst, Baltimore, MD 21218 USA
[2] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA
[3] European Space Agcy, Div Astrophys, Dept Space Sci, F-75738 Paris, France
[4] Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA
[5] Univ Nacl Autonoma Mexico, Inst Astron, Morelia 58090, Michoacan, Mexico
[6] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA
[7] Univ Wisconsin, Dept Astron, Madison, WI 53705 USA
[8] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA
[9] New Mexico State Univ, Dept Astron, Las Cruces, NM 88003 USA
[10] Australian Natl Univ, Mt Stromlo & Siding Spring Observ, Weston, ACT 2611, Australia
来源：
ASTROPHYSICAL JOURNAL | 1999年 / 515卷 / 01期
基金：
美国国家航空航天局;
关键词：
binaries : close; circumstellar matter; ISM : jets and outflows; stars : individual (XZ Tauri); stars : pre-main-sequence;
D O I：
10.1086/311961
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report observations of dramatic morphological changes in the extremely young Herbig-Haro object ejected by the pre-main-sequence binary XZ Tauri. Nubble Space Telescope images taken in 1995 showed a filled bubble of emission nebulosity extending 4" north-northeast of the system in the direction of a previously known jet. New images obtained in 1998 show that the bubble has undergone a remarkable transition into a limb-brightened structure as it continues its motion away from the binary. The new images suggest that we may be witnessing the initial formation of the postshock cooling zone in a newly emerging Herbig-Haro bow shock system, probably accompanied by significant temporal evolution in the nebula's emission line spectrum.
引用
收藏
页码：L35 / L38
页数：4
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