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Dust distribution near young stars of bipolar flows deduced from CCD polarimetry at 1 μm

Published online by Cambridge University Press:  04 August 2017

R. Lenzen
R. Lenzen*
Affiliation:
Max-Planck-Institut für Astronomie, Königstuhl, D-6900 Heidelberg, FRG

Abstract

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Deep direct 1 μm images and polarization maps have been taken for several objects of bipolar molecular outflow, using a CCD camera at the prime-focus of the 3.5 m telescope on Calar Alto/Spain. Compact reflection nebulae are found near GL2591, GL2884 = S140/IRS1, GL2789 = V645 Cyg, L1551/IRS5 and within the red reflection nebula in Serp. The position angles of polarization vectors coincide in all cases with that of the 2.2 μm polarization of the central source itself, and it is perpendicular to the direction of mass outflow (if it is well defined). The visual extinction in front of the central source, is at least 20 mag higher than that which is affecting the scattered light. This is consistent with a model of bipolar outflow, where the active source is surrounded by a dust torus or ring.

Type
Bipolar Flows, Jets and Protostars
Information
Symposium - International Astronomical Union , Volume 122: Circumstellar Matter , 1987 , pp. 127 - 128
Copyright
Copyright © Reidel 1987 

References

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