High-spatial-resolution studies of young stellar objects. II - A thick disk surrounding LYNDS 1551, IRS 5

Details High-spatial-resolution studies of young stellar objects. II - A thick disk surrounding LYNDS 1551, IRS 5 High-spatial-resolution studies of young stellar objects. II - A thick disk surrounding LYNDS 1551, IRS 5

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.2575s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 90, Dec. 1985, p. 2575-2580. NSF-NASA-supported research.

Astronomy and Astrophysics

Astronomy

57

Accretion Disks, Early Stars, High Resolution, Stellar Envelopes, Astronomical Maps, Cosmic Dust, Infrared Astronomy, Light Scattering, Nebulae

Scientific paper

Heavily oversampled, small (2arcsec) beam 2 μ maps of the region surrounding Lynds 1551, IRS 5 provide the basis for reconstructing maximum-entropy "images" which have an effective spatial resolution of ≡0.6arcsec. These images reveal an extended, cusp-like structure surrounding IRS 5. This structure most likely results as light from IRS 5 is scattered in our direction by dust grains located in a thick disk of diameter ≡1000 AU. The disk is viewed nearly edge-on and has a mass in dust grains of ≡2 to 5×10-5M_sun;. Its polar axis lies along the observed direction of the bipolar mass outflow inferred from molecular line observations of the L1551 cloud. It is possible that the observed infrared disk may represent the inner regions of a much larger thick-disk structure, whose shape derives from the combined effects of disk rotation and the gravitational field of IRS 5.

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