Results 61 to 70 of about 55,835 (345)
The evolutionary history of ultra-compact accreting binaries
Astronomy & AstrophysicsContext. AM Canum Venaticorum (AM CVn) stars are ultra-compact binary systems composed of a white dwarf primary accreting from a hydrogen-deficient donor.
Yu W. +35 more
doaj +1 more source
Long-Term Photometry of Very Slow Novae
Open Astronomy, 2003 Long-term photographic, photoelectric and recent CCD photometry of the classical nova V723 Cas and symbiotic novae V1329 Cyg, PU Vul, V1016 Cyg and HM Sge were used to find their orbital periods.
Chochol D. +3 more
doaj +1 more source
Recurrent Novae, Classical Novae, Symbiotic Novae, and Population II Novae
, 2001 Light curve analysis of decay phase of nova outburst are summarized. Nova duration is determined by the strong wind mass-loss which depends only on the white dwarf mass. Fast novae correspond very massive white dwarfs and very slow novae correspond almost lower mass limit of white dwarfs.
openaire +2 more sources
International Astronomical Union Colloquium, 1990 AbstractThermonuclear models of recurrent novae demand white dwarf accretors near the Chandrasekhar mass. In this case, the known recurrent novae should possess classical counterparts bearing the same structural parameters and space distribution, save for having only marginally less massive white dwarfs.
openaire +1 more source
A systematic search for novae in M31 on a large set of digitized archival Schmidt plates
, 2007 This paper reports on the detection of optical novae in our neighbour galaxy M31 based on digitized historical Tautenburg Schmidt plates. The accurate positions of the detected novae lead to a much larger database when searching for recurrent novae in ...
Henze, M., Meusinger, H., Pietsch, W.
core +3 more sources
Advanced Functional Materials, EarlyView.Metabolic changes in immune cells direct the phenotype and function of the host immune system. Smart nanomaterials must target metabolic pathways to direct immune cell fate. This study reports the fabrication and first application of germanane quantum dots (GeHQDs) to modulate inflammation in vitro and in vivo.
Abhay Srivastava +7 more
wiley +1 more source
The Contribution of a Community Event to Expert Work: An Activity Theoretical Perspective
Outlines, 2004 Becoming an expert in any knowledge domain takes time and a great deal of learning, both theoretical and experiential. The individual’s knowledge is often supplemented through knowledge exchanges with other experts.
Alanah Kazlauskas, Kathryn Crawford
doaj
Unveiling the white dwarf in the eclipsing polar HU Aquarii
Astronomy & AstrophysicsWe present an analysis of high-speed u- and r-band photometry of the eclipsing polar HU Aqr that was obtained with ULTRACAM mounted on the VLT. The observations were performed during a low state, permitting us for the first time to determine the contact ...
Schwope A. D. +4 more
doaj +1 more source
Characterizing the Photometric Response of the ANS Collaboration Monitoring Program
Open Astronomy, 2012 the ANS Collaboration uses the UBV RCIC filters from various commercial manufacturers (Omega Optical, Custom Scientific, Schuler, Optec, Astrodon) for its ongoing photometric monitoring of symbiotic stars.
Munari U., Moretti S.
doaj +1 more source
, 2020 Uma viagem ao universo das cidades novas, esse é o convite que essa obra vem oferecer aos leitores a fim de transitar, a partir da visão particular do autor, pelo contexto, pelos conceitos e pelos aspectos inerentes a esse tipo urbanístico, ainda pouco explorado pela literatura especializada brasileira.
openaire +2 more sources