Results 61 to 70 of about 493,128 (267)

Relation between Long-term Activity and Luminosity of the Pre- and Post-novae CT Ser and V446 Her

The Astronomical Journal, 2023
We show a relation of the pre- and post-nova activity of CT Ser (nova 1948) and V446 Her (nova 1960), known to have remarkably similar orbital periods P _orb . We use both photographic and CCD photometric observations.
Vojtěch Šimon
doaj   +1 more source

Systematics of Dwarf Novae [PDF]

Astrophysics and Space Science, 1987
AbstractFrom about 30 Dwarf Novae with the best determined distances the following relationships are found.(i)a tight correlation between absolute magnitude at maximum light, Mv (max), and orbital period, P.(ii)a correlation between Mv (min) and P showing wide scatter.(iii)a correlation between Mv (mean), the mean absolute magnitude averaged over ...
openaire   +1 more source

Dynamo driven accretion discs and dwarf nova eruptions

, 1995
We explore the consequences of a magnetic dynamo origin for the viscosity in accretion discs, for the structure and evolution of discs in dwarf nova systems.
A Brandenburg, CA Tout, JK Cannizzo, SA Balbus   +3 more
core   +1 more source

Nova-induced mass transfer variations [PDF]

, 2001
We investigate variations of the mass transfer rate in cataclysmic variables (CVs) that are induced by nova outbursts. The ejection of nova shells leads to a spread of transfer rates in systems with similar orbital period.
Howell, Steve, Kolb, Ulrich, Rappaport, Saul, Schenker, Klaus   +3 more
core   +2 more sources

V2487 Oph 1998: a post nova in an intermediate polar

EPJ Web of Conferences, 2014
V2487 Oph (Nova Oph 1998) is a classical nova that exploded in 1998. XMM-Newton observations performed between 2 and 9 years after the explosion showed emission related to restablished accretion, and indicative of a magnetic white dwarf.
Hernanz Margarita
doaj   +1 more source

OUTBURST ACTIVITY OF THE DWARF NOVA AB DRACONIS

Odessa Astronomical Publications, 2017
Two different stages of the outburst activity were found cyclically replacing each other every 6 yr. Mean outburst cycle is 13.1327d (1943-1991). Photometric period is P = 0.1529581d. Amplitude increases with decreasing brightness.
V. P. Smykov, L. I. Shakun
doaj   +1 more source

High speed photometry of faint cataclysmic variables - VI. Car2, V1040 Cen, Ha 075648, IL Nor (Nova Nor 1893), HS Pup (Nova Pup 1963), SDSS J2048-06, CSS 081419-005022 and CSS 112634-100210

, 2009
We have observed 8 faint cataclysmic variable stars photometrically. The nova-like Car2 was extensively sampled but showed little variability. V1040 Cen was observed near the end of a dwarf nova outburst and possessed dwarf nova and quasi-periodic ...
Brian Warner, Downes, Drake, Duerbeck, Duerbeck, Eggen, Gill, Hoard, Hoard, Kato, Kawka, Motch, O'Donoghue, Patrick A. Woudt, Patterson, Pretorius, Strohmeier, Szkody, Szkody, Warner, Warner, Warner, Wickramasinghe, Woudt, Woudt, Woudt, Woudt, Woudt, Zwitter   +28 more
core   +1 more source

Dwarf novae in the Hamburg quasar survey : rarer than expected [PDF]

, 2006
Aims. We report the discovery of five new dwarf novae that were spectroscopically identified in the Hamburg Quasar Survey (HQS),and discuss the properties of the sample of new dwarf novae from the HQS. Methods.
A. Aungwerojwit, A. Staude, Abbott, Andronov, Araujo-Betancor, Araujo-Betancor, Aungwerojwit, B. T. Gänsicke, Barker, Bergeron, Berriman, Bertin, Beuermann, Billington, Cannizzo, D. Engels, D. Mislis, D. Nogami, de Kool, E. T. Harlaftis, Fiedler, Gilliland, Gänsicke, Gänsicke, Gänsicke, Gänsicke, Gänsicke, H.-J. Hagen, Hagen, Hamilton, Hessman, Hessman, Horne, Howell, Howell, Jiang, Kato, Kato, King, King, Knigge, Kolb, Kolb, M. A. P. Torres, Martin, Mennickent, Monet, Nogami, O. Baernbantner, Osaki, P. Rodríguez-Gil, P. Schmeer, Paczynski, Patterson, Patterson, Patterson, Patterson, Patterson, Patterson, Patterson, Politano, R. E. Fried, R. Schwarz, Rappaport, Reimers, Renvoizé, Ringwald, Ritter, Rodríguez-Gil, Rodríguez-Gil, Rodríguez-Gil, Rodríguez-Gil, Rogoziecki, Roth, S. Araujo-Betancor, Scargle, Schneider, Schwarz, Schwarzenberg-Czerny, Schwarzenberg-Czerny, Shafter, Shafter, Shafter, Spruit, Stauffer, Szkody, Szkody, Tappert, Thorstensen, Thorstensen, Thorstensen, Tovmassian, Townsley, van Teeseling, Voges, Wade, Wu, Zhang   +97 more
core   +2 more sources

A Light-curve Analysis of Gamma-Ray Nova V959 Mon: Distance and White Dwarf Mass [PDF]

, 2018
V959 Mon is a nova detected in gamma-rays. It was discovered optically about 50 days after the gamma-ray detection owing to its proximity to the Sun. The nova’s speed class is unknown because of the lack of the earlier half of its optical light curve and
I. Hachisu, M. Kato
semanticscholar   +1 more source

Discovery and Initial Investigation of a New Low Surface Brightness Planetary Nebula Candidate at High Galactic Latitude

Astronomische Nachrichten, EarlyView.
ABSTRACT Planetary nebulae represent a late evolutionary phase of low‐ to intermediate‐mass stars. In this article, we present the serendipitous discovery of a previously unknown, faint potential Galactic planetary nebula (PN) in the constellation Camelopardalis, identified during a survey‐inspection, aiming at the detection of dwarf companions of the ...
W. E. Celnik, P. Köchling, S. Kotov, J. Kozok, Y. Galata, L. Magrini, A. Moiseev, M. Nischang, C. Reese, P. Remmel, P. Riepe, T. Zilch, K. Werner   +12 more
wiley   +1 more source