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Analysis of photospheric magnetic fields in AR 12546: a case study
Abdelkawy, Ali G. A.; Shaltout, Abdelrazek M. K.
We investigate high-resolution observations with the spectropolarimeter (SP) aboard the Hinode satellite of the Solar Optical Telescope (SOT) of a positive polarity sunspot of an active region (AR) (NOAA 12546). We present a case study for the properties of the thermal, magnetic field, and plasma flows as a function of the optical depth from the i…
First investigations of 14 neglected, late-type contact binaries
M, Raghu Prasad; Jagirdar, Rukmini; Devarapalli, Shanti Priya
In the current work we present the first investigations of 14 neglected, late-type, short period contact binaries using period variation, photometric and spectroscopic analysis performed on long term space and ground based observations. The binaries in study belong to spectral classes F to K. In this study the two contact binaries TIC 242100930 an…
Discovery of eclipses in the cataclysmic variable ASASSN-V J090756.65+715859.5
Kozhevnikov, V. P.
I conducted photometry of the cataclysmic variable ASASSN-V J090756.65+715859.5 and detected eclipses that were not previously known. I observed 12 eclipses. Photometric data were obtained in two compact groups of nights separated by one year. Due to the large coverage of observations and due to the fact that all eclipses had a small scatter of po…
Solar source longitudinal dependence of SEPs and their association with solar flares and radio-loud CMEs
Moon, Y. -J.; Pappa Kalaivani, P.; Prakash, O. +4 more
In this article we examine the occurrence probability of 104 major (