SIMBAD references

2003A&A...400..297R - Astronomy and Astrophysics, volume 400, 297-302 (2003/3-2)

The field brown dwarf LP 944-20 and the Castor moving group.


Abstract (from CDS):

A reliable age estimation for the field brown dwarf LP 944-20 is accomplished through the analysis of its kinematic properties. The space velocities of this star strongly suggest its membership in the so-called Castor moving group. LP 944-20 can be sensibly assumed to have the group's age, which is estimated to be ∼320Myr, and metal content, which is found to be roughly solar. With these new constrains and the available photometry and lithium abundance, current brown dwarf models are put to a test. Using the IR magnitudes and the lithium diagnostics, the models are able to provide a reasonable description of the brown dwarf's properties (to within a few sigma) but yield an age which is roughly 50% larger than our estimate. Possible reasons for this discrepancy are discussed.

Abstract Copyright:

Journal keyword(s): stars: low-mass, brown dwarfs - stars: fundamental parameters - stars: kinematics - stars: individual: LP 944-20

Status at CDS:  

Simbad objects: 27

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