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

S. Viti, J. Tennyson, H.R.A. Jones, F. Allard, P. Hauschildt

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

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.
Original languageEnglish
Title of host publicationIn: Brown Dwarfs and Extrasolar Planets - ASP Conf Series 134
PublisherAstronomical Society of the Pacific
Pages471-4
ISBN (Print)1-886733-54-6
Publication statusPublished - 1998

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