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High Angular Resolution Observations of Her 36

Published online by Cambridge University Press:  19 July 2016

B. Stecklum ,
R.R. Howell ,
A. Eckart  and
A. Richichi
B. Stecklum
Affiliation:
MPG working group “Dust in star-forming regions”, Jena, FRG
R.R. Howell
Affiliation:
University of Wyoming, Laramie, U.S.A.
A. Eckart
Affiliation:
Max Planck Institute for Extraterrestrial Physics, Garching, FRG
A. Richichi
Affiliation:
Max Planck Institute for Astronomy, Heidelberg, FRG

Abstract

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The star Herschel 36 (Her 36) which ionizes most of the Hourglass nebula has been observed during a lunar occultation as well as by speckle interferometry in the near infrared (NIR). From the lunar occultation data the strip brightness profile has been extracted which shows that in the L′ band Her 36 is extended with a FWHM of 0.45″. Subsequent speckle interferometry revealed 11 sources in a 6′ × 6′ area at a level of 0.15″ resolution. From the comparison of the brightness profile obtained by the occultation and the strip brightness profile synthesized from the speckle image, we conclude that Her 36 is surrounded by a very young infrared cluster.

Keywords

NIRspeckle observationslunar occultationHer 36star formation
Type
Imaging Results: Radio and Millimeter Waves
Information
Symposium - International Astronomical Union , Volume 158: Very High Angular Resolution Imaging , 1994 , pp. 364 - 366
Copyright
Copyright © Kluwer 1994 

References

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