Results 21 to 30 of about 228,090 (281)
Period Change of the Contact Binary AH Tauri [PDF]
Journal of Astronomy and Space Sciences, 2004 New BVRI photometric observations of the contact binary AH Tau were performed with the 61 cm reflector and a 2K CCD camera at the Sobaeksan Optical Astronomy Observatory during seven nights from September to December, 2001. A total of 144 times of minima
Dongjoo Lee +5 more
doaj +1 more source
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 +34 more sources
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
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
Light Curve Analysis of SAO23229 [PDF]
Journal of Astronomy and Space Sciences, 1993 We have made UBV light curves of a newly discovered eclipsing binary, SAO23229 at Sobaeksan Astronomy Observatory. We determined a minimum light time of HJD2448636.1170+/-0.0005 that is 3 minutes later than predicted time, and founda peculiar light ...
Ho-Il Kim +3 more
doaj
Close Binary System GO Cyg [PDF]
, 2011 In this study, we present long term photometric variations of the close binary system \astrobj{GO Cyg}. Modelling of the system shows that the primary is filling Roche lobe and the secondary of the system is almost filling its Roche lobe.
B. Kalomeni +48 more
core +2 more sources
Heliocentric Potential (HCP) Prediction Model for Nowscast of Aviation Radiation Dose [PDF]
Journal of Astronomy and Space Sciences, 2015 It is well known that the space radiation dose over the polar route should be carefully considered especially when the space weather shows sudden disturbances such as CME and flares.
Junga Hwang +4 more
doaj +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
Hard synchrotron BL Lacs: the case of 1ES 1101-232 [PDF]
, 2000 The bright X-ray selected BL Lac object 1ES1101--232 shows a flat X-ray spectrum, making it detectable with high statistics over the wide BeppoSAX energy range.
Caccianiga, Alessandro +4 more
core +3 more sources
A novel algorithm for extracting frequent gradual patterns
Machine Learning with Applications, 2021 The extraction of frequent gradual pattern is an important problem in computer science and largely studied by the scientist’s community of research in data mining. A frequent gradual pattern translates a recurrent co-variation between the attributes of a
Tayou Djamegni Clémentin +2 more
doaj