The double degenerate LP400-22 revisited (2009)
Vennes, S., Kawka, A., Vaccaro, T. R., Silvestri, N. M.
We re-examine the properties of the high-velocity and extremely low mass white dwarf LP 400-22 and its close companion. Based on an extended observation timeline we determined a binary period of P=...
Two-micron all-sky survey J01542930+0053266 : a new eclipsing M dwarf binary system (2008)
Becker, A. C., Agol, E., Silvestri, N. M., Bochanski, J. J., Laws, C., West, A. A., ...
We report on Two-Micron All-Sky Survey (2MASS) J01542930+0053266, a faint eclipsing system composed of two M dwarfs. The variability of this system was originally discovered during a pilot study of...
2MASS J01542930+0053266 : A New Eclipsing M-dwarf Binary System (2008)
Becker, A. C., Agol, E., Silvestri, N. M., Bochanski, J. J., Laws, C., West, A. A., ...
We report on 2MASS J01542930+0053266, a faint eclipsing system composed of two M dwarfs. The variability of this system was originally discovered during a pilot study of the 2MASS Calibration Point...
The pulsation modes of the pre-white dwarf PG 1159-035 (2008)
Costa, J. E. S., Kepler, S. O., Winget, D. E., O'Brien, M. S., Kawaler, S. D., Costa, A. F. M., ...
Context. PG 1159-035, a pre-white dwarf with T_(eff) ≃ 140 000 K, is the prototype of both two classes: the PG 1159 spectroscopic class and the DOV pulsating class. Previous studies of PG 1159-035...
The pulsation modes of the pre-white dwarf PG 1159-035 (2007)
Costa, J. E. S., Kepler, S. O., Winget, D. E., O'Brien, M. S., Kawaler, S. D., Costa, A. F. M., ...
PG 1159-035, a pre-white dwarf with T_eff=140,000 K, is the prototype of both two classes: the PG1159 spectroscopic class and the DOV pulsating class. Previous studies of PG 1159-035 photometric data...
Discovery of two new accreting pulsating white dwarf stars (2007)
Mukadam, Anjum S., Gänsicke, B. T., Szkody, P., Aungwerojwit, A., Howell, Steve B., Fraser, O. J., ...
We report the discovery of two new accreting pulsating white dwarf stars amongst the cataclysmic variables of the Sloan Digital Sky Survey: SDSSJ074531.91+453829.5 and SDSSJ091945.10+085710.0. We...
Discovery of a Magnetic White Dwarf/Probable Brown Dwarf Short-Period Binary (2005)
Schmidt, G. D., Szkody, P., Silvestri, N. M., Cushing, M. C., Liebert, J., Smith, P. S.
The magnetic white dwarf SDSS J121209.31+013627.7 exhibits a weak, narrow Halpha emission line whose radial velocity and strength are modulated on a period of ~90 minutes. Though indicative of...
A Second Stellar Color Locus: a Bridge from White Dwarfs to M stars (2004)
Smolcic, V., Ivezic, Z., Knapp, G. R., Lupton, R. H., Pavlovski, K., Ilijic, S., ...
We report the discovery of a locus of stars in the SDSS g-r vs. u-g color-color diagram that connects the colors of white dwarfs and M dwarfs. While its contrast with respect to the main stellar...
An Initial Survey of White Dwarfs in the Sloan Digital Sky Survey (2003)
Harris, H. C., Liebert, J., Kleinman, S. J., Nitta, A., Anderson, S. F., Knapp, G. R., ...
An initial assessment is made of white dwarf and hot subdwarf stars observed in the Sloan Digital Sky Survey. In a small area of sky (190 square degrees), observed much like the full survey will be,...