Close Binaries in the η Chamaeleontis Cluster

Details Close Binaries in the η Chamaeleontis Cluster Close Binaries in the η Chamaeleontis Cluster

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aj....124.2899k&link_type=abstract

The Astronomical Journal, Volume 124, Issue 5, pp. 2899-2904.

Astronomy and Astrophysics

Astronomy

14

Stars: Binaries: General, Infrared Radiation, Galaxy: Open Clusters And Associations: Individual: Name: Η Chamaeleontis, Stars: Pre-Main-Sequence, Techniques: High Angular Resolution

Scientific paper

We have used speckle interferometry and adaptive optics observations to search for multiple systems among 13 stars in the η Chamaeleontis cluster. We discovered two previously unknown subarcsecond binaries. Placing the components in infrared color-magnitude diagrams shows that most members of η Cha are coeval. Repeated observations of the binary RECX 1 allow us to determine a preliminary orbit and derive a system mass of about 2 Msolar.
Based on observations obtained at the European Southern Observatory, La Silla, proposals 56.E-0197, 62.I-0399, 65.I-0350, 65.I-0086, 67.C-0354, and 68.C-0539.

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