A Comparison of the Infrared Spectra of Two Very Late-type M Dwarfs with Different Gravities

Viti, S., Tennyson, J., Jones, H.R.A., Allard, F. and Hauschildt, P. (1998) A Comparison of the Infrared Spectra of Two Very Late-type M Dwarfs with Different Gravities. In: UNSPECIFIED.

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We present observations obtained during the commissioning of the upgraded Cooled Grating Spectrometer 4 on the UK Infrared Telescope on Mauna Kea, of the very low-mass objects TVLM 513-46546 and Gl 569B. Spectra were taken from 1.0 to 2.5um allowing the peak of their energy distributions to be measured. TVLM 513-46546 and Gl 569B have very similar spectral types and colours but they differ by more than a magnitude in luminosity; this indicates that their surface gravities differ by around 0.5 dex. We interpret their stellar parameters by making comparisons with the latest atmospheric models.

Item Type	Conference or Workshop Item (Other)
Additional information	Original paper can be found at: http://www.astrosociety.org/pubs/cs/113-155.html--Copyright Astronomical Society of the Pacific
Date Deposited	15 May 2025 16:19
Last Modified	10 Jul 2025 23:22