NASA ADS Astronomy/Planetary Abstract Service

· Find Similar Abstracts (with default settings below)
·
· Translate Abstract
Title:
Diffraction-limited Bispectrum Speckle Interferometry and Speckle Polarimetry of the Young Bipolar Outflow Source S140 IRS1
Authors:
Preibisch, Th.; Hannemann, T.; Hofmann, K.-H.; Schertl, D.; Weigelt, G.; Balega, Y.
Affiliation:
AA(Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany), AB(Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany), AC(Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany), AD(Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany), AE(Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany), AF(Special Astrophysical Observatory, Nizhnij Arkhyz, Zelenchuk region, Karachai-Cherkesia, 357147, Russia)
Journal:
Astronomische Gesellschaft Abstract Series, Vol. 17. Abstracts of Contributed Talks and Posters presented at the Annual Scientific Meeting of the Astronomische Gesellschaft at Bremen, September 18-23, 2000.
Publication Date:
00/2000
Origin:
AUTHOR
Bibliographic Code:
2000AGM....17..P06P

Abstract

We present bispectrum speckle interferometry and speckle polarimetry of the deeply embedded infrared bipolar outflow source S140 IRS1, a massive protostellar object in the L1204 molecular cloud. Using the SAO 6 m telescope, we obtained 280 mas resolution polarization maps of S140 IRS1 as well as a K-band image with diffraction-limited resolution λ/D of 76 mas, which is the highest angular resolution image of a young outflow source ever obtained in the infrared. Our data suggest that the central source is marginally resolved with a FWHM diameter of approximately 20 mas (~ 20 AU). The most remarkable feature in our image is a bright extended and very clumpy structure pointing away from the central source in exactly the same direction as the blue-shifted CO outflow lobe. A centro-symmetric pattern of high polarization in this feature suggests that we see scattered light from the central source. We interprete this feature as the clumpy inner surface of a partially evacuated cavity in the circumstellar envelope around IRS1, which has been excavated by the strong outflow from IRS1.
Bibtex entry for this abstract   Custom formatted entry for this abstract (see Preferences)

Find Similar Abstracts:

Use: Authors
Title
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy/Planetary
Instrumentation
Physics/Geophysics
ArXiv Preprints
    

NASA ADS Homepage | ADS Sitemap | Query Form | Preferences | HELP | FAQ