THE JET/COUNTERJET SYMMETRY OF THE HH 212 OUTFLOW

被引：5
|
作者：
Noriega-Crespo, A. [1 ]
Raga, A. C. [2 ]
Lora, V [3 ]
Rodriguez-Ramirez, J. C. [4 ]
机构：
[1] Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA
[2] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City, DF, Mexico
[3] Univ Nacl Autonoma Mexico, Inst Radioastron & Astrofis Teor, Mexico City, DF, Mexico
[4] Univ Sao Paulo, IAG, Sao Paulo, Brazil
来源：
REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA | 2020年 / 56卷 / 01期
基金：
巴西圣保罗研究基金会;
关键词：
Herbig-Haro objects; ISM: individual objects: HH212; ISM: jets and outflows; shock waves; stars: formation; stars:; winds; out-flows; SPITZER OBSERVATIONS; JET; SYSTEM; HH-212; FLOW;
D O I：
10.22201/ia.01851101p.2020.56.01.05
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present Spitzer (IRAC) images and a VLT 2.1 mu m image of the HH 212 outflow. We find that this outflow has a strong symmetry, with jet/counterjet knot pairs with Delta x < 1 '' position offsets. We deduce that the jet/counterjet knots are ejected with time differences Delta tau 0 approximate to 6 yr and velocity differences Delta(v0) approximate to 2 km s(-1). We also analyze the deviations of the knot positions perpendicular to the outflow axis, and interpret them in terms of a binary orbital motion of the outflow source. Through this model, we deduce a approximate to 0.7 M-circle dot mass for the outflow source, and a separation of approximate to 80 AU between the components of the binary (assuming equal masses for the two components). Finally, using the IRAC data and the VLT 2.1 mu m image we measure the proper motion velocities, obtaining values from 50 to 170 km s(-1).
引用
收藏
页码：29 / 38
页数：10
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