Astron. Astrophys. 326, 632-639 (1997)

New multiple young stellar objects discovered
by near-infrared speckle imaging

N. Ageorges ¹, A. Eckart ², J.-L. Monin ³ and F. Ménard <sup>3

1</sup> ESO, Karl Schwarzschild Strasse 2, D-85748 Garching bei München, Germany
² Max Planck Institut für Extraterrestrische Physik (MPE), Giessenbachstrasse, D-85748 Garching bei München, Germany
³ Laboratoire d'Astrophysique, Observatoire de Grenoble, Université Joseph Fourier, BP 53X, F-38041 Grenoble Cedex 9, France

Received 2 December 1996 / Accepted 20 May 1997

Abstract

We present the results of a near infrared high angular resolution study of young stellar objects. The observations have been carried out in 1993 and 1994 with the speckle camera SHARP 1 installed at the ESO-NTT. The sources were selected because of their known high degree of polarization at optical wavelengths, in order to search for disk-like extended structures. This paper only concentrates on the new multiple systems discovered. After a general presentation of the sample, each new system is presented individually. Then the relative reddening of the individual components as well as the possible link between the morphology of a system and its polarization are discussed.

Key words: polarizationcircumstellar matterstars: formationstars: imagingstars: pre-main sequenceinfrared: stars

Send offprint requests to: N. Ageorges at ESO

SIMBAD Objects

Contents

• 1. Introduction
• 2. Observations
• 3. Results
  • 3.1. Comments on the complete sample
  • 3.2. CHX 6B
  • 3.3. CHX 10A
  • 3.4. Do Ar 32
  • 3.5. ROX 5
  • 3.6. ROX 16
  • 3.7. AS 310
• 4. Discussion
  • 4.1. Multiplicity
  • 4.2. Color-color diagram
  • 4.3. Polarization
  • 4.4. Selection criteria
• Acknowledgements
• References

© European Southern Observatory (ESO) 1997

Online publication: October 15, 1997
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