POSITIVE AND NEGATIVE SUPERHUMPS OF THE DWARF NOVA MN DRA
Odessa Astronomical Publications, 2010 We present the result of O–C analysis of the dwarf nova MN Dra. It is based on the multi-site photometric observations that were made over 77 nights in August – November, 2009. The total exposure was 433 hours.
D. A. Samsonov +9 more
doaj +1 more source
Erupting Cataclysmic Variable Stars in the Nearest Globular Cluster, NGC 6397: Intermediate Polars?
, 2005 NGC 6397 is the closest globular cluster, and hence the ideal place to search for faint stellar populations such as cataclysmic variables (CVs). HST and Chandra observers have identified nine certain and likely CVs in this nearby cluster, including ...
A. Dieball +9 more
core +2 more sources
The nature of dwarf nova outbursts [PDF]
, 2000 We show that if the dwarf-nova disc instability model includes the effects of heating by stream impact and tidal torque dissipation in the outer disc, the calculated properties of dwarf-nova outbursts change considerably, and several notorious ...
Armitage +47 more
core +4 more sources
The Massive CO White Dwarf in the Symbiotic Recurrent Nova RS Ophiuchi [PDF]
, 2017 If accreting white dwarfs (WDs) in binary systems are to produce type Ia supernovae (SNe Ia), they must grow to nearly the Chandrasekhar mass and ignite carbon burning.
J. Mikołajewska, M. Shara
semanticscholar +1 more source
Hidden lineages in the African Sky Islands: A taxonomic reevaluation of Afrocarduus (Compositae)
Journal of Systematics and Evolution, EarlyView.Species delimitation is crucial for biodiversity studies. Using Hyb‐Seq and phylogenomics, we reassessed Afrocarduus, endemic to Afromontane and Afroalpine regions, uncovering 16 evolutionary lineages (2.3 Mya). Morphological data support their distinctiveness, with acaulescence evolving independently twice. The traditionally broad A.
Lucía D. Moreyra +9 more
wiley +1 more source
SPECTROSCOPIC MONITORING OF NOVA VULPECULAE 2007 (V458 Vul)
Odessa Astronomical Publications, 2008 We present results of the spectroscopic monitoring of the peculiar nova V458 Vul during eleven months. At the early decline of the brightness the nova transformed from Fe II to the He/N type.
T. N. Tarasova
doaj +1 more source
Long-term photometry of the eclipsing dwarf nova V893 Scorpii - Orbital period, oscillations, and a possible giant planet [PDF]
, 2014 The cataclysmic variable V893 Sco is an eclipsing dwarf nova which, apart from outbursts with comparatively low amplitudes, exhibits a particularly strong variability during quiescence on timescales of days to seconds.The present study aims to update the
A. Bruch
semanticscholar +1 more source
Nations as Natural Families: From Kin Selection to Multilevel Selection
Nations and Nationalism, EarlyView.ABSTRACT In nationalism studies, nations are often viewed as artificial constructs. By contrast, many sociobiologists see nations as natural families or kin groups. They explain altruism and shared ancestry among co‐nationals through kin selection theory, which accounts for altruism towards close genetic relatives. In this article, we refine and deepen
Filipe Nobre Faria, Sandra Dzenis
wiley +1 more source
Extensive photometry of the WZ Sge-type dwarf nova V455 And (HS2331+3905): detection of negative superhumps and coherence features of the short-period oscillations [PDF]
, 2015 We report the results of photometry of the WZ Sge-type dwarf nova V455 And. Observations were obtained over 19 nights in 2013 and 2014. The total duration of the observations was 96 h.
Kozhevnikov, V. P.
core +1 more source
The Kukarkin-Parenago Relation for Dwarf Novae and Novae [PDF]
Astrophysics and Space Science, 1987 AbstractThe period-amplitude relation and the period-energy relation for dwarf novae and novae are discussed. The total outbursts energy is shown to be a more suitable characteristic of the outburst than its amplitude.
openaire +1 more source