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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 276785.0, MPI für Astronomie / Publikationen_mpia
AB Doradus C: age, spectral type, orbit, and comparison to evolutionary models
Authors:Nielsen, E. L.; Close, L. M.; Guirado, J. C.; Biller, B. A.; Lenzen, R.; Brandner, W.; Hartung, M.; Lidman, C.
Language:English
Date of Publication (YYYY-MM-DD):2005
Title of Journal:Astronomische Nachrichten
Journal Abbrev.:Astronomische Nachrichten
Volume:326
Issue / Number:10
Start Page:1033
End Page:1039
Review Status:Peer-review
Audience:Experts Only
Abstract / Description: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 M\sun 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.
Free Keywords:infrared: stars; stars: formation; stars: low-mass; brown dwarfs; stars: pre-main sequence; stars: individual (AB Dor)
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://esoads.eso.org/cgi-bin/nph- bib_query?bibco... [ID No:1]
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