Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Ringwald, F."'
We report time-resolved photometry of the cataclysmic variable V849 Her, and measure a period of 0.1414 \pm 0.0030 days (3.394 \pm 0.072 hours). We also present photometry taken over several weeks in 2010 and 2011, as well as light curves from 1995 t
Externí odkaz:
http://arxiv.org/abs/1202.3518
Autor:
Rude II, Gerald D., Ringwald, F. A.
We present differential photometry of the cataclysmic variable star SW Sextantis. A time series analysis was performed in search of superhumps in the accretion disk of this star, which is the prototype of a class of cataclysmic variables, the SW Sex
Externí odkaz:
http://arxiv.org/abs/1112.4642
A radial velocity study is presented of the cataclysmic variable V378 Pegasi (PG 2337+300). It is found to have an orbital period of 0.13858 +/- 0.00004 d (3.32592 +/- 0.00096 hours). Its spectrum and long-term light curve suggest that V378 Peg is a
Externí odkaz:
http://arxiv.org/abs/1111.3677
Autor:
Rude II, Gerald D., Ringwald, F. A.
We present four nights of time-resolved photometry of the cataclysmic variable star HV And. Our time series analysis has revealed a prominent period at 3.368 +/- 0.060 hours, as well as some low frequency power. We interpret this signal, from saw-too
Externí odkaz:
http://arxiv.org/abs/1111.0348
Autor:
Rude II, Gerald D., Ringwald, F. A.
We present a time-resolved differential photometric study and time series analysis of the nova-like cataclysmic variable star LQ Peg. We discover three periodicities in the photometry, one with a period of 3.42 +/- 0.03 hours, and another with a peri
Externí odkaz:
http://arxiv.org/abs/1111.0346
Autor:
Gariety, Michael J., Ringwald, F. A.
A critical analysis of three methods of estimating distances to cataclysmic variables (CVs) is performed. These methods, by Ak et al., Beuermann, and Knigge, all use near-infrared (JHK or Ks) magnitudes and the Barnes-Evans relation. We compare all t
Externí odkaz:
http://arxiv.org/abs/1107.4658
Autor:
Ringwald, F. A., Velasco, Kenia
A radial velocity study of the cataclysmic variable ES Dra (PG 1524+622) is presented. ES Dra is found to have an orbital period of 0.17660 \pm 0.00006 d (4.2384 \pm 0.0014 h). The mass-losing secondary star of ES Dra is detectable in the spectrum, a
Externí odkaz:
http://arxiv.org/abs/1107.4175
We present optical and X-ray time-series photometry of EI UMa that reveal modulation at 746 and 770 s, which we interpret as the white dwarf spin and spin-orbit sidebands. These detections, combined with previous X-ray studies, establish EI UMa as an
Externí odkaz:
http://arxiv.org/abs/0802.3542
Autor:
Shankland, P. D., Rivera, E. J., Laughlin, G., Blank, D. L., Price, A., Gary, B., Bissinger, R., Ringwald, F., White, G., Henry, G. W., McGee, P., Wolf, A. S., Carter, B., Lee, S., Biggs, J., Monard, B., Ashley, M. C. B.
Publikováno v:
Astrophys.J.653:700-707,2006
We report the results of a globally coordinated photometric campaign to search for transits by the P ~ 30 d and P ~ 60 d outer planets of the 3-planet system orbiting the nearby M-dwarf Gl 876. These two planets experience strong mutual perturbations
Externí odkaz:
http://arxiv.org/abs/astro-ph/0608489