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

页码：29 / 38

页数：10

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