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The NIRSPEC Brown Dwarf Spectroscopic Survey

Published online by Cambridge University Press:  26 May 2016

Ian S. McLean ,
M. R. McGovern ,
Lisa Prato ,
Adam J. Burgasser  and
J. Davy Kirkpatrick
Ian S. McLean
Affiliation:
UCLA, Dept. Physics & Astronomy, Los Angeles, CA 90095
M. R. McGovern
Affiliation:
UCLA, Dept. Physics & Astronomy, Los Angeles, CA 90095
Lisa Prato
Affiliation:
UCLA, Dept. Physics & Astronomy, Los Angeles, CA 90095
Adam J. Burgasser
Affiliation:
UCLA, Dept. Physics & Astronomy, Los Angeles, CA 90095
J. Davy Kirkpatrick
Affiliation:
Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125

Abstract

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This paper describes the status of a new 0.9 – 2.4 μm spectroscopic survey of low-mass stars and brown dwarfs. Flux-calibrated spectra of 30 objects from M6 to T8 have been obtained with a uniform spectral resolution of R=2,000. For the J-band alone, 60 objects have been observed. In addition, we have obtained the first sequence of spectra at R=20,000 (15 km/s) showing the detailed behavior of the J-band potassium doublets over the same range in spectral type. A few sources have been monitored for radial velocity variations, but none have been detected at the ±1–2 km/s level. Preliminary infrared spectral classification indices have been derived and several young brown dwarfs show clear spectral signatures of lower gravity. Our survey will be available on-line in the future.

Type
Part 7. Atmospheres and Internal Structure
Information
Symposium - International Astronomical Union , Volume 211: Brown Dwarfs , 2003 , pp. 385 - 388
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

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