The spectroscopic study of M8.5-M9.5 stars and brown dwarfs

The spectroscopic study of M8.5-M9.5 stars and brown dwarfs

We present high-resolution spectra analysis of the three late-M dwarfs LP944-20, SIPS J2045-6332 and DENIS-P J0021.0-4244. The stellar spectra were observed with Very Large Telescope/Ultraviolet-Visual Echelle Spectrograph (VLT/UVES) in optical and near-infrared regions. The effective temperatures T...

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Veröffentlicht in:EPJ Web of conferences 2013-01, Vol.47, p.4002-np
Hauptverfasser: Kuznetsov, M.K., Pavlenko, Y.V., Galvez-Ortiz, M.C.
Format: Artikel
Sprache:eng
Schlagworte:
Atmospheres
Dust
Energy distribution
Mathematical models
Spectra
Spectroscopy
Stellar spectra
Very Large Telescope
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Zusammenfassung:We present high-resolution spectra analysis of the three late-M dwarfs LP944-20, SIPS J2045-6332 and DENIS-P J0021.0-4244. The stellar spectra were observed with Very Large Telescope/Ultraviolet-Visual Echelle Spectrograph (VLT/UVES) in optical and near-infrared regions. The effective temperatures T sub(e)ffand log g was defined by comparing observed and theoretical energy distributions for the investigated objects. Synthetic spectra were calculated for PHOENIX atmosphere models - COND and DUSTY, as well as for Semi-empirical atmosphere model. We discuss the influence of the effects associated with dust in stellar atmosphere on the energy distribution in the stellar spectra.
ISSN:2100-014X
2100-014X
DOI:10.1051/epjconf/20134704002