Results 1 to 10 of about 200,082 (276)
Mass Ejection from the Symbiotic Prototype Z and During its 2006 Outburst
Open Astronomy, 2012 High-resolution spectroscopic observations in the region of the Balmer Hα and Hγ lines of the symbiotic binary Z And were performed during its major eruption in 2006.
Tomov N. A. +2 more
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Symbiotic Nova PU Vul - 33 Years of Observations
Open Astronomy, 2012 We present UBVRI light curves of the symbiotic nova PU Vul after its outburst in 1978. Three observed eclipses of the hot component by the cool one were used to determine the ephemeris of the binary system as JD (Min I) = 2444550(15) + 4897(10) × E days.
Shugarov S., Chochol D., Kolotilov E.
doaj +1 more source
Frontiers in Astronomy and Space Sciences, 2022 The internal motions of the ionized gas in the shells of planetary nebulae (PNe) have served as relevant diagnostic tools to understand the development of this important stage of stellar evolution.
J. A. López
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Photometric Activity of the Symbiotic Star CH Cyg During 2008–2011
Open Astronomy, 2012 We present results of UBVRC observations of the symbiotic star CH Cyg before and after optical and X-ray bursts in 2009 at various timescales. Rapid variability was found only during a strong burst (U ~ 9.5 mag) in 2009 October, while during the low ...
Shugarov S. +4 more
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Open Astronomy, 2017 Evolved stars with a helium core can be formed by non-conservative mass exchange interaction with a companion or by strong mass loss. Their masses are smaller than 0.5 M⊙. In the database of the Sloan Digital Sky Survey (SDSS), there are several thousand
Pelisoli Ingrid +2 more
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Evaluating GAIA performances on eclipsing binaries. I. Orbits and stellar parameters for V505 Per, V570 Per and OO Peg [PDF]
, 2001 The orbits and physical parameters of three detached, double-lined A-F eclipsing binaries have been derived combining H_P, V_T, B_T photometry from the Hipparcos/Tycho mission with 8500-8750 Ang ground-based spectroscopy, mimicking the photometric ...
A. Prša +26 more
core +4 more sources
Beyond binaries and before becoming: Reconsidering resistance in UK higher education
PRISM, 2023 Drawing from the tensions within non-representational and human practice perspectives on affect, this paper continues the task of re-conceptualising academic-level resistance in the context of UK higher education. Such re-conceptualisation is underpinned
Mollie Baker
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Dynamics of black holes in de Sitter spacetimes [PDF]
, 2012 Nonlinear dynamics in cosmological backgrounds has the potential to teach us immensely about our Universe, and also to serve as prototype for nonlinear processes in generic curved spacetimes.
Cardoso, Vitor +5 more
core +2 more sources
The evolution of photo-evaporating viscous discs in binaries [PDF]
, 2017 A large fraction of stars are in binary systems, yet the evolution of proto-planetary discs in binaries has been little explored from the theoretical side.
Clarke, Cathie J., Rosotti, Giovanni P.
core +2 more sources
The BSN Application-I: Photometric Light Curve Solutions of Contact Binary Systems
GalaxiesLight curve analysis of W UMa-type contact binary systems using MCMC or MC methods can be time-consuming, primarily because the repeated generation of synthetic light curves tends to be relatively slow during the fitting process.
Ehsan Paki +2 more
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