Results 71 to 80 of about 3,534,154 (173)

New Observations of the Old Magnetic Nova GQ Muscae

Open Astronomy, 2014
Photometric observations of GQ Mus performed between 1992 and 2011 are reported. We find that the total amplitude of the orbital modulation of its brightness decreased from ~ 0.9 mag in 1992 to ~ 0.2 mag in 2010, becoming comparable to the amplitude of ...
Narloch W., Kaluzny J., Krzeminski W., Pych W., Rozyczka M., Shectman S., Thompson I. B., Tomov T.   +7 more
doaj   +1 more source

Time-resolved photometry and spectroscopy of the new deeply-eclipsing SW Sextantis star HS 0728+6738 [PDF]

, 2004
We present time-resolved optical spectroscopy and photometry, and far-ultraviolet spectroscopy of HS 0728+6738, a cataclysmic variable discovered in the Hamburg Quasar Survey.
Rodríguez-Gil, P., H.-J. Hagen, D. Engels, Hagen, H.-J., H. Barwig, P. Rodríguez-Gil, Barwig, H., Gaensicke, B. T., B. T. Gänsicke, Engels, Dieter   +9 more
core   +1 more source

Temporary Equilibrium Mass Transfer Rate in Cataclysmic Variables?

The Astrophysical Journal
The separation of a binary system increases or decreases over time, governed by angular momentum (AM) changes. In cataclysmic variables (CVs), Roche-lobe overflow from the red dwarf (RD) to the white dwarf (WD) redistributes AM within the system through ...
Yael Hillman
doaj   +1 more source

Early Photometric and Spectral Evolution of Nova Cygni 2014 (V2659 Cyg)

Open Astronomy, 2015
We present optical spectroscopic and UBV (RI)C photometric observations of Nova Cygni 2014 (V2659 Cyg) from its rebrightening to the nebular stage. After the first maximum, the nova underwent several irregular flare-like rebrightenings, with amplitudes ...
Burlak M. A., Esipov V. F., Komissarova G. V.   +2 more
doaj   +1 more source

Preface to the Special Collection “Are There Scientific Revolutionaries? Scientific, Historical, and Philosophical Perspectives”

Natural Sciences, Volume 6, Issue 3, July 2026.
Ute Deichmann, Bretislav Friedrich
wiley   +1 more source

1RXS J173021.5-055933 : a cataclysmic variable with a fast-spinning magnetic white dwarf [PDF]

, 2008
Aims. We present the first X-ray observations with the XMM-Newton and INTEGRAL satellites of the recently discovered cataclysmic variable 1RXS J173021.5-055933, together with simultaneous UV and coordinated optical photometry aiming at characterising its
Matt, Giorgio, Falanga, M., Littlefair, S., Falanga M, Bonnet-Bidaud, Jean-Marc, Bonnet-Bidaud, J.-M., Gänsicke, B., Gaensicke, B. T., K. Mukai, Mukai K, Dhillon, V. S., de Martino, D., Matt, G., de Martino D, Gänsicke, B. T. (Boris T.), Marsh, T., Mukai, K., De Martino, Domitilla, T. R. Marsh, F. Haberl, Littlefair, S. P., Bonnet Bidaud JM, Littlefair SP, Marsh, T. R., Haberl, F., Gansicke BT, Gänsicke, B. T., Dhillon, V., D. de Martino, Marsh TR, Mouchet, M., V. Dhillon, Haberl F, G. Matt, Bonnet-Bidaud, J., Dhillon V., Mukai, Koji, M. Mouchet, M. Falanga, B. T. Gänsicke, Mouchet M, S. P. Littlefair, J.-M. Bonnet-Bidaud   +42 more
core   +1 more source

Cyclical Period Changes in Cataclysmic Variables: A Statistical Study

The Astrophysical Journal
We report the results of a statistical study of cyclical period changes in cataclysmic variables (CVs). Assuming the third-body hypothesis as the cause of period changes, we estimate the third-body mass, m _3 , and its separation from the binary, a _3 ...
Leandro Souza, Raymundo Baptista
doaj   +1 more source

Cataclysmic variables from a ROSAT/2MASS selection. I, Four new intermediate polars [PDF]

, 2005
We report the first results from a new search for cataclysmic variables (CVs) using a combined X-ray (ROSAT)/infrared (2MASS) target selection that discriminates against background active galactic nuclei. Identification spectra were obtained at the Isaac
Araujo-Betancor, S., Morales-Rueda, L., Harlaftis, E. T., Harlaftis, E., Steeghs, D., Gaensicke, B. T., Pyrzas, S., Rodríguez-Gil, P., Giannakis, O., Gänsicke, B.T., Marsh, T.R., Edge, A., Aungwerojwit, A., Marsh, T. R.   +13 more
core   +1 more source

Cataclysmic variables

, 2006
Cataclysmic variables are binary stars in which a relatively normal star is transferring mass to its compact companion. This interaction gives rise to a rich range of behaviour, of which the most noticeable are the outbursts that give the class its name.
Robert Connon Smith (9654968)
core   +1 more source

TESS Light Curves of Cataclysmic Variables. VI. Intermediate Polars

The Astrophysical Journal Supplement Series
The long and (almost) continuous high-cadence light curves provided by the TESS space mission are ideally suited to study in detail brightness variations in stellar sources on the broad range of timescales between minutes and months.
Albert Bruch
doaj   +1 more source