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

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

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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 language	English
Title of host publication	In: Brown Dwarfs and Extrasolar Planets - ASP Conf Series 134
Publisher	Astronomical Society of the Pacific
Pages	471-4
ISBN (Print)	1-886733-54-6
Publication status	Published - 1998

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

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.",

author = "S. Viti and J. Tennyson and H.R.A. Jones and F. Allard and P. Hauschildt",

note = "Original paper can be found at: http://www.astrosociety.org/pubs/cs/113-155.html--Copyright Astronomical Society of the Pacific",

year = "1998",

language = "English",

isbn = "1-886733-54-6",

pages = "471--4",

booktitle = "In: Brown Dwarfs and Extrasolar Planets - ASP Conf Series 134",

publisher = "Astronomical Society of the Pacific",

address = "United States",

}

TY - GEN

T1 - A Comparison of the Infrared Spectra of Two Very Late-type M Dwarfs with Different Gravities

AU - Viti, S.

AU - Tennyson, J.

AU - Jones, H.R.A.

AU - Allard, F.

AU - Hauschildt, P.

N1 - Original paper can be found at: http://www.astrosociety.org/pubs/cs/113-155.html--Copyright Astronomical Society of the Pacific

PY - 1998

Y1 - 1998

N2 - 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.

AB - 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.

M3 - Conference contribution

SN - 1-886733-54-6

SP - 471

EP - 474

BT - In: Brown Dwarfs and Extrasolar Planets - ASP Conf Series 134

PB - Astronomical Society of the Pacific

ER -

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

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