The Environment and Magnetic Field of Cometary Globule CG30

Astronomy and Astrophysics – Astronomy

Scientific paper

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Interstellar Matter, Interstellar Magnetic Fields, Stellar Polarimetry, Infrared Sources (Astronomical), Radiosources (Astronomical), Pre-Main-Sequence Stars, Star Formation, Physical Properties, Polarimetry, Infrared, Radio, Microwave, Jets, Outflows And Bipolar Flows

Scientific paper

In this work, we combine observations of optical linear polarization (R band), IRAS far-infrared images and radio molecular lines to investigate the cometary globule CG30 (at IRAS Vela Shell). CG30 shows Herbig-Haro objects, molecular outflows, hosts a very young binary star and has a star formation efficiency of about 6% to 17%. Its magnetic field is important to support the CG structure and shows evidence of torsion and compression of the field lines. The quadrupolar outflow of the binary star affects the temperature of the molecular gas, and changes the degree of polarization of the dust grains in the environment of CG30. This work is based on observations collected at LNA/CNPq, Brazil and SEST/ESO, Chile.

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