English
Related papers

Related papers: V344 Lyrae: A Touchstone SU UMa Cataclysmic Variab…

200 papers

We have studied the short-cadence Kepler public light curves of SU UMa stars, V344 Lyr and V1504 Cyg extending over a period of more than two years by using power spectral analysis. We determined the orbital period of V344 Lyr to be…

Solar and Stellar Astrophysics · Physics 2015-06-16 Yoji Osaki , Taichi Kato

The timing capabilities and sensitivity of Kepler, NASA's observatory to find Earth-sized planets within the habitable zone of stars, are well matched to the timescales and amplitudes of accretion disk variability in cataclysmic variables.…

Solar and Stellar Astrophysics · Physics 2015-05-19 Martin Still , Steve B. Howell , Matt A. Wood , John K. Cannizzo , Alan P. Smale

We present time dependent modeling based on the accretion disk limit cycle model for a 270 d light curve of the short period SU UMa-type dwarf nova V344 Lyr taken by Kepler. The unprecedented precision and cadence (1 minute) far surpass…

Solar and Stellar Astrophysics · Physics 2015-05-20 J. K. Cannizzo , M. D. Still , S. B. Howell , M. A. Wood , A. P. Smale

We examine the Kepler light curves of V1504 Cyg and V344 Lyr, encompassing ~736 d at 1 min cadence. During this span each system exhibited ~64-65 outbursts, including six superoutbursts. We find that, in both systems, the normal outbursts…

Solar and Stellar Astrophysics · Physics 2015-06-03 John K. Cannizzo , Alan P. Smale , Matt A. Wood , Martin D. Still , Steve B. Howell

We studied the Kepler light curves of three SU UMa-type dwarf novae. Both the background dwarf nova of KIC 4378554 and V516 Lyr showed a combination of precursor-main superoutburst, during which superhumps always developed on the fading…

Solar and Stellar Astrophysics · Physics 2015-06-16 Taichi Kato , Yoji Osaki

We studied the large-amplitude SU UMa-type dwarf nova V344 Lyr. A combination of our observations and reports to VSNET has yielded an extensive coverage of outbursts between 1994 July and 2001 June. The analysis of this data showed a mean…

Astrophysics · Physics 2009-11-07 Taichi Kato , Gary Poyner , Timo Kinnunen

Continuing the project described by Kato et al. (2009, PASJ 61, S395, arXiv:0905.1757), we collected times of superhump maxima for 51 SU UMa-type dwarf novae mainly observed during the 2010-2011 season. Although most of the new data for…

We present the results of an analysis of data covering 1.5 years of the dwarf nova V447 Lyr. We detect eclipses of the accretion disk by the mass donating secondary star every 3.74 hrs which is the binary orbital period. V447 Lyr is…

Solar and Stellar Astrophysics · Physics 2015-06-05 Gavin Ramsay , John K. Cannizzo , Steve B. Howell , Matt A. Wood , Martin Still , Thomas Barclay , Alan Smale

We analyzed the Kepler long cadence data of KIC 7524178 (=KIS J192254.92+430905.4), and found that it is an SU UMa-type dwarf nova with frequent normal outbursts. The signal of the negative superhump was always the dominant one even during…

Solar and Stellar Astrophysics · Physics 2013-09-06 Taichi Kato , Yoji Osaki

We analysed Kepler data of two similar dwarf novae V344 Lyr and V1504 Cyg in order to study optical fast stochastic variability (flickering) by searching for characteristic break frequencies in their power density spectra. Two different…

Solar and Stellar Astrophysics · Physics 2016-05-25 A. Dobrotka , J. -U. Ness , I. Bajcicakova

We report extensive photometry of the dwarf nova V419 Lyr throughout its 2006 July superoutburst till quiescence. The superoutburst with amplitude of ~3.5 magnitude lasted at least 15 days and was characterized by the presence of clear…

Astrophysics · Physics 2007-10-08 A. Rutkowski , A. Olech , K. Mularczyk , D. Boyd , R. Koff , M. Wiśniewski

We made a supplemental study of the superoutbursts and superhumps in SU UMa stars by using the recently released Kepler public data of V1504 Cyg and V344 Lyr. One of the superoutbursts in V1504 Cyg was preceded by a precursor normal…

Solar and Stellar Astrophysics · Physics 2015-06-17 Yoji Osaki , Taichi Kato

We studied the background dwarf nova of KIC 11412044 in the Kepler public data and identified it with GALEX J194419.33+491257.0. This object turned out to be a very active SU UMa-type dwarf nova having a mean supercycle of about 150 d and…

Solar and Stellar Astrophysics · Physics 2015-06-18 Taichi Kato , Yoji Osaki

We have studied the SC (short cadence) Kepler light curve of an SU UMa star, V1504 Cyg, which extends for a period of about 630 d. All superoutbursts in V1504 Cyg have turned out to be of the precursor-main type and the superhump first…

Solar and Stellar Astrophysics · Physics 2015-06-12 Yoji Osaki , Taichi Kato

We report on time-resolved CCD photometry of four outbursts of a short-period SU UMa-type dwarf nova, V844 Herculis. We successfully determined the mean superhump periods to be 0.05584(64) days, and 0.055883(3) for the 2002 May…

We carried out time-resolved $V$-band photometry of DM Lyr during long outbursts in 1996 July and in 1996 February-March at Ouda Station, Kyoto University and at Osaka Kyoiku University. Since superhumps were clearly detected in the light…

Astrophysics · Physics 2015-06-24 D. Nogami , H. Baba , K. Matsumoto , T. Kato

The eclipsing novalike cataclysmic variable star V348 Pup exhibits a persistent luminosity modulation with a period 6 per cent longer than its 2.44 hour orbital-period (Porb). This has been interpreted as a `positive superhump' resulting…

Astrophysics · Physics 2009-10-31 Daniel J. Rolfe , Carole A. Haswell , Joseph Patterson

We observed the 2014 superoutburst of the SU UMa-type intermediate polar CC Scl. We detected superhumps with a mean period of 0.05998(2) d during the superoutburst plateau and during three nights after the fading. During the…

Solar and Stellar Astrophysics · Physics 2015-06-23 Taichi Kato , Franz-Josef Hambsch , Arto Oksanen , Peter Starr , Arne Henden

We report K2 observations of the eclipsing cataclysmic variable V729 Sgr which covered nearly 80 days in duration. We find five short outbursts and two long outbursts, one of which shows a clear plateau phase in the rise to maximum…

Solar and Stellar Astrophysics · Physics 2017-05-31 Gavin Ramsay , Matt A. Wood , John Cannizzo , Steve Howell , Alan Smale

We present the TESS observations of CRTS J110014.7+131552, SDSS J093537.46+161950.8, and [PK2008] HalphaJ130559. Among them, a superoutburst is observed in CRTS J110014.7+131552 which is associated with the precursor outburst, where…

Solar and Stellar Astrophysics · Physics 2025-08-29 Arti Joshi , Claus Tappert , Márcio Catelan , Linda Schmidtobreick , Mridweeka Singh
‹ Prev 1 2 3 10 Next ›