SIMBAD references

2017AJ....154..195B - Astron. J., 154, 195-195 (2017/November-0)

New binaries in the ε Cha association.


Abstract (from CDS):

We present Adaptive Optics-aided speckle observations of 47 young stars in the ε Cha association made at the 4 m Southern Astrophysical Research Telescope in the I-band. We resolved 10 new binary pairs, 5 previously known binaries, and 2 triple systems, also previously known. In the separation range between 4 and 300 au, the 30 association members of spectral types G0 and later host 6 binary companions, leading to the raw companion frequency of 0.010 ± 0.04 per decade of separation, comparable to the main sequence dwarfs in the field. On the other hand, all five massive association members of spectral types A and B have companions in this range. We discuss the newly resolved and known binaries in our sample. Observed motions in the triple system ε Cha, composed of three similar B9V stars, can be described by tentative orbits with periods 13 and ∼900 years and a large mutual inclination.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): binaries: close - open clusters and associations: individual: epsilon Cha - stars: pre-main sequence - techniques: high angular resolution - techniques: high angular resolution

VizieR on-line data: <Available at CDS (J/AJ/154/195): table1.dat table2.dat table3.dat>

Simbad objects: 60

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2017AJ....154..195B and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact