Bibcode
DOI
Wang, Y.; Jones, H. R. A.; Smart, R. L.; Marocco, F.; Pinfield, D. J.; Shao, Z.; Steele, I. A.; Zhang, Z H..; Andrei, A. H.; Burgasser, A. J.; Cruz, K. L.; Yu, J.; Clarke, J. R. A.; Leigh, C. J.; Sozzetti, A.; Murray, D. N.; Burningham, B.
Bibliographical reference
Publications of the Astronomical Society of the Pacific, Volume 126, issue 935, pp.15-26
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1
2014
Citations
9
Refereed citations
5
Description
We report the parallax and proper motion of five L dwarfs obtained with
observations from the robotic Liverpool Telescope. Our derived proper
motions are consistent with published values and have considerably
smaller errors. Based on our spectral type versus absolute magnitude
diagram, we do not find any evidence for binaries among our sample--or,
at least no comparable mass binaries. Their space velocities locate them
within the thin disk, and based on the model comparisons, they have
solar-like abundances. For all five objects, we derived effective
temperature, luminosity, radius, gravity, and mass from an evolutionary
model (CBA00) and our measured parallax; moreover, we derived their
effective temperature by integrating observed optical and near-infrared
spectra and model spectra (BSH06 or BT-Dusty) at longer wavelengths to
obtain bolometric flux using the classical Stefan-Boltzmann law.
Generally, the three temperatures for one object derived using two
different methods with three models are consistent, although at lower
temperature (e.g., for L4) the differences among the three temperatures
are slightly larger than those at higher temperature (e.g., for L1).
Related projects
Very Low Mass Stars, Brown Dwarfs and Planets
Our goal is to study the processes that lead to the formation of low mass stars, brown dwarfs and planets and to characterize the physical properties of these objects in various evolutionary stages. Low mass stars and brown dwarfs are likely the most numerous type of objects in our Galaxy but due to their low intrinsic luminosity they are not so
Rafael
Rebolo López