Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...173..124l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 173, no. 1, Feb. 1987, p. 124-130.
Astronomy and Astrophysics
Astronomy
56
Infrared Sources (Astronomy), Molecular Clouds, Reflection Nebulae, Star Formation, Anisotropic Media, Astronomical Maps, Charge Coupled Devices, Cosmic Dust, Linear Polarization
Scientific paper
Deep 1 μm-CCD-exposures and polarization maps of the molecular outflow sources GL 2884 = S 140/IRS, GL 2789 = V645 Cyg, GL 2591 and L 1551/IRS 5 are presented. All these objects are surrounded by diffuse emission regions. Compact reflection nebulae are found near to the central illuminating IR-sources situated within the axis of molecular outflow. The polarization maps show the centro-symmetric pattern of polarization vectors typical of reflection nebulae. The positions of illuminating sources defined by this directional pattern coincide with the positions of infrared sources. A strongly anisotropic dust distribution is deduced for these objects: while very high extinction values are found within the line of sight to the central sources, light is escaping rather unhindered into the direction of mass outflow.
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