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Testing for Photometric Variability at the L/T Boundary

Published online by Cambridge University Press:  26 May 2016

Melissa L. Enoch
Affiliation:
Caltech, MS 105–24, Pasadena, CA, 91125
Michael E. Brown
Affiliation:
Caltech, MS 150-21, Pasadena, CA, 91125
Adam J. Burgasser
Affiliation:
UCLA, 8965 Math Sciences Bldg, Los Angeles, CA, 90095

Abstract

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We construct K s -band light curves for nine field L and T brown dwarfs using the Palomar 60 inch Telescope. Results of a robust statistical analysis indicate that about half the targets show significant evidence for variability. Two of these variable targets have marginally significant peaks in the Lomb-Scargle periodogram. The phased light curves show evidence for periodic behavior on timescales of about 1.5 and 3.0 hours.

Type
Part 8. Activity and Weather
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

Bailer-Jones, C. A. L. & Mundt, R. 2001, A&A, 367, 218 Google Scholar
Burgasser, A. J., et al. 2002, ApJ, 571, L151 CrossRefGoogle Scholar
Kirkpatrick, J. D., et al. 2000, AJ, 120, 447 CrossRefGoogle Scholar
Martín, E. L., Zapatero Osorio, M. R., & Lehto, H. J. 2001 ApJ, 557, 822 CrossRefGoogle Scholar
Tinney, C. G. & Tolley, A. J. 1999, MNRAS, 304, 119 CrossRefGoogle Scholar
Woodward, R. C. 1992, Ph.D. dissertation, University of Wisconsin, Madison Google Scholar
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