Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-06-11
Astronomy and Astrophysics
Astrophysics
Conference proceeding "Origins of stars and planets: The VLT view", ESO, Garching, April 24-27 2001
Scientific paper
10.1007/10856518_16
How frequent are brown dwarf binaries? Do brown dwarfs have planets? Are current theoretical pre-main-sequence evolutionary tracks valid down to the substellar regime? - Any detection of a companion to a brown dwarf takes us one step forward towards answering these basic questions of star formation. We report here on a search for spectroscopic and visual companions to young brown dwarfs in the Cha I star forming cloud. Based on spectra taken with UVES at the VLT, we found significant radial velocity (RV) variations for five bona-fide and candidate brown dwarfs in Cha I. They can be caused by either a (substellar or planetary) companion or stellar activity. A companion causing the detected RV variations would have about a few Jupiter masses. We are planning further UVES observations in order to explore the nature of the detected RV variations. We also found that the RV dispersion is only ~ 2km/s indicating that there is probably no run-away brown dwarf among them. Additionally a search for companions by direct imaging with the HST and SOFI (NTT) has yielded to the detection of a few companion candidates in larger orbits.
Alves J. J.
Brandner Wolfgang
Comeron Fernando
Guenther Eike E.
Huelamo Nuria
No associations
LandOfFree
Multiplicity of young brown dwarfs in Cha I does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Multiplicity of young brown dwarfs in Cha I, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiplicity of young brown dwarfs in Cha I will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-560364