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Interstellar Extinction at High Galactic Latitudes: An Analytical Approximation
Kovaleva, D. A.; Malkov, O. Yu.; Avdeeva, A. S. +1 more
Distance dependences of interstellar extinction (${{A}V}(d)$) for a number of high-latitude areas of the southern sky were obtained using the data of the RAVE DR6 spectroscopic survey and the Gaia DR2/EDR3 astrometric survey. These dependencies were approximated by the classical barometric function (cosecant law). Function parameters we…
On Some Issues of Cross-Identification of Astronomical Catalogs
Sobolev, A. M.; Ladeyschikov, D. A.
The paper deals with the issues of cross-identification of sources from various astronomical catalogs. One of the main problems under consideration is how to cross-identify a large number of catalogs in a selected region in the sky when there is no reference source catalog? For cross-identification of large amounts of data, it is proposed to use t…
Solar Photospheric Magnetic Fields, Coronal Mass Ejections, and Type II Radio Bursts in Cycles 23 and 24
Bilenko, I. A.
We consider the events of type II radio bursts (RBII) in the decametric and hectometric ranges from 1 to 16 MHz and the dependence of the parameters of associated coronal mass ejections (CMEs) on the background characteristics of the plasma and interplanetary magnetic field (IMF) in the regions where each radio burst was detected in solar cycles 2…