Results 21 to 30 of about 368,263 (301)
Roche Model and Absolute Dimensions of the Eclipsing Binary Y Cam with a Pulsating Component [PDF]
Journal of Astronomy and Space Sciences, 2002 We performed CCD photometric observations of the eclipsing binary Y Cam with a pulsating component, for 16 nights from November 2000 to May 2001 using a V filter attached to the 61-cm reflector at Sobaeksan Optical Astronomy Observatory.
J. W. Lee +4 more
doaj +1 more source
Cepstrum Analysis of Terrestrial Impact Crater Records [PDF]
Journal of Astronomy and Space Sciences, 2008 Study of terrestrial impact craters is important not only in the field of the solar system formation and evolution but also of the Galactic astronomy. The terrestrial impact cratering record recently has been examined, providing short- and intermediate ...
Heon-Young Chang, Cheongho Han
doaj +1 more source
Applied Sciences, 2021 Due to the space and time constraints of turbulence measurement equipment and the experiment scene, it is difficult to obtain the atmosphere refractive index structure constant over the ocean.
Manman Xu +5 more
doaj +1 more source
The ISO Galactic Metallicity Gradient Revisited [PDF]
, 2002 Two independent groups (Giveon et al. 2002; Martin-Hernandez et al. 2002) have recently investigated the Galactic metallicity gradient as probed by ISO observations of mid-infrared emission lines from HII regions.
Giveon, Uriel +2 more
core +2 more sources
Structural-parametric model of electromagnetoelastic actuator for astrophysics and optical astronomy [PDF]
Journal of Astrophysics & Aerospace Technology, 2017 Abstract The impossibility of a gravitational equilibrium of clusters of galaxies was the main argument supporting the existence of Dark Matter. However, the expansion of Universe is also a main element of evolution of clusters and it leads to a dispersion of these large structures at a rate that is slower than the expansion itself: the ...
Piersanti M +4 more
openaire +35 more sources
Optical and Radio variability of the Northern VHE gamma-ray emitting BL Lac objects [PDF]
A&A 593, A98 (2016), 2016 We compare the variability properties of very high energy gamma-ray emitting BL Lac objects in the optical and radio bands. We use the variability information to distinguish multiple emission components in the jet, to be used as a guidance for spectral energy distribution modelling.
arxiv +1 more source
The long bar as seen by the VVV Survey: II. Star counts [PDF]
, 2013 Context: There is still some debate about the presence and the morphological properties of the long bar in the inner Galaxy. Aims: We investigate the morphological properties of the long Galactic bar using the VVV survey extending star counts at least ...
Amôres, Eduardo +5 more
core +2 more sources
Constraints on variation in $α$ and $m_e$ from WMAP 7-year data [PDF]
Astronomy and Astrophysics 517 A62 (2010), 2010 We update the constraints on the time variation of the fine structure constant $\alpha$ and the electron mass $m_e$, using the latest CMB data, including the 7-yr release of WMAP. We made statistical analyses of the variation of each one of the constants and of their joint variation, together with the basic set of cosmological parameters.
arxiv +1 more source
A search for periodicity in the light curves of selected blazars [PDF]
Astron.Rep.50:1-11,2006, 2005 We present an analysis of multifrequency light curves of the sources 2223-052 (3C 446), 2230+114 (CTA 102), and 2251+158 (3C 454.3), which had shown evidence of quasi-periodic activity. The analysis made use of data from the University of Michican Radio Astronomy Observatory (USA) at 4.8, 8, and 14.5 GHz, as well as the Metsahovi Radio Astronomy ...
arxiv +1 more source
Superfluid vortices in neutron stars [PDF]
, 2001 A microscopic, quantum mechanical model for neutron vortices in the crust of a neutron star is presented. After a brief introduction to the Bogoliubov- de Gennes equations, which form the basis for our calculations, we present results for density ...
Anderson +22 more
core +2 more sources