6533b871fe1ef96bd12d11ba
RESEARCH PRODUCT
AB Doradus C: age, spectral type, orbit, and comparison to evolutionary models
Markus HartungLaird M. CloseWolfgang BrandnerRainer LenzenEric L. NielsenJ. C. GuiradoBeth BillerChristopher Lidmansubject
PhysicsSolar massHertzsprung–Russell diagramAstrophysics (astro-ph)Brown dwarfFOS: Physical sciencesAstronomy and AstrophysicsAstrophysicsType (model theory)AstrophysicsOrbitsymbols.namesakeStarsSpace and Planetary SciencesymbolsLow Massdescription
We expand upon the results of Close et al. 2005 regarding the young, low-mass object AB Dor C and its role as a calibration point for theoretical tracks. We present an improved spectral reduction and a new orbital solution with two additional epochs. Our improved analysis confirms our spectral type of M8 (+/- 1) and mass of 0.090+/-0.003 solar masses for AB Dor C. Comparing the results for AB Dor C with other young, low-mass objects with dynamical masses we find a general trend where current evolutionary models tend to over-predict the temperature (or under-predict the mass) for low mass stars and brown dwarfs. Given our precision, there is a ~99% chance that the mass of AB Dor C is underestimated by the DUSTY tracks in the HR diagram.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-12-01 | Astronomische Nachrichten |