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Multiwaveband photometry of the irradiated brown dwarf WD0137-349B
S. L. Casewell, K. A. Lawrie, P. F. L. Maxted +7
WD0137-349 is a white dwarf-brown dwarf binary system in a 116 minute orbit. We present radial velocity observations and multiwaveband photometry from V, R and I in the optical, to…
The substellar companion in the eclipsing white dwarf binary SDSS J141126.20+200911.1
S. P. Littlefair, S. L. Casewell, S. G. Parsons +14
We present high time resolution SDSS- and SDSS- light curves of the primary eclipse in SDSS J141126.20+200911.1, together with time-resolved X-Shooter spectroscopy and near…
Hubble Space Telescope Imaging and Spectroscopy of the Sirius-Like Triple Star System HD 217411
Jay B. Holberg, Sharah L. Casewell, Howard E. Bond +2
We present Hubble Space Telescope imaging and spectroscopy of HD 217411, a G3 V star associated with the extreme ultraviolet excess source (EUV 2RE J2300-07.0). This star is reveal…
Spectroscopically confirmed brown dwarf members of Coma Berenices and the Hyades
S. L. Casewell, S. P. Littlefair, M. R. Burleigh +1
We have obtained low and medium resolution spectra of 9 brown dwarf candidate members of Coma Berenices and the Hyades using SpEX on the NASA InfaRed Telescope Facility and LIRIS o…
Component masses of young, wide, non-magnetic white dwarf binaries in the SDSS DR7
R. B. Baxter, P. D. Dobbie, Q. A. Parker +7
We present a spectroscopic component analysis of 18 candidate young, wide, non-magnetic, double-degenerate binaries identified from a search of the Sloan Digital Sky Survey Data Re…
Irradiated brown dwarfs
S. L. Casewell, M. R. Burleigh, K. A. Lawrie +3
We have observed the post common envelope binary WD0137-349 in the near infrared , and bands and have determined that the photometry varies on the system period (116 min…