Results 41 to 50 of about 568,712 (199)

Radio-Wave Propagation and Electromagnetic Surface Waves [PDF]

Proceedings of the National Academy of Sciences, 1947
A Discrepancy and Its Resolution. - The problem of the propagation of radio-waves along the surface of the (plane) earth was first treated in a celebrated paper by A. Sommerfeld (1909).(1) Let the (r, φ)-plane of a cylindric system of coordinates coincide with the plane of the earth surface and let the z-axis point vertically upward.
openaire   +3 more sources

AMI Large Array radio continuum observations of Spitzer c2d small clouds and cores [PDF]

, 2010
We perform deep 1.8 cm radio continuum imaging towards thirteen protostellar regions selected from the Spitzer c2d small clouds and cores programme at high resolution (25") in order to detect and quantify the cm-wave emission from deeply embedded young ...
André, André, André, Anglada, Anglada, Anglada, Anglada, Anna M. M. Scaife, Anthony N. Lasenby, Armstrong, Bieging, Bontemps, Bourke, Bourke, Carmen Rodríguez-Gonzálvez, Carrasco-González, Casassus, Cassen, Churchwell, Connelley, Crapsi, Curiel, Curiel, David Titterington, de Zotti, Draine, Dunham, Dunham, Dunham, Elizabeth Waldram, Emily I. Curtis, Enoch, Evans, Evans, Fuller, Furuya, Green, Guy G. Pooley, Harvey, Hatchell, Hatchell, Hayashi, Hurley-Walker, Jonathan T. L. Zwart, Kauffmann, Kauffmann, Keith J. B. Grainge, Kenyon, Kenyon, Kirk, Konigl, Launhardt, Launhardt, Lee, Malak Olamaie, Matthew Davies, Michael P. Hobson, Michel Schammel, Muchovej, Myers, Natasha Hurley-Walker, Ohashi, Panagia, Patnaik, Paul F. Scott, Pravdo, Reynolds, Richard D. E. Saunders, Rodríguez, Rodríguez, Rodríguez, Rodríguez, Scaife, Scaife, Scaife, Scaife, Shinnaga, Shirley, Shu, Simon, Smith, Stamatellos, Terebey, Thomas M. O. Franzen, Timothy Shimwell, Umemoto, Visser, Waldram, Winkler, Wright, Wu, Young, Young, Young, Young, Yun, Zwart   +96 more
core   +1 more source

A Unique Multi-Messenger Signal of QCD Axion Dark Matter [PDF]

, 2020
We propose a multi-messenger probe of QCD axion Dark Matter based on observations of black hole-neutron star binary inspirals. It is suggested that a dense Dark Matter spike may grow around intermediate mass black holes ($10^{3}-10^{5} \mathrm{\,M_{\odot}
Chianese, Marco, Edwards, Thomas D. P., Kavanagh, Bradley J., Nissanke, Samaya M., Weniger, Christoph   +4 more
core   +2 more sources

Ionosphere disturbance during cosmodrome “Vostochniy” launches

E3S Web of Conferences, 2018
It is known that during spacecraft launches ionospheric plasma properties are modified in the result of impact of shock-acoustic waves generated during carrier rocket supersonic motion. As a rule, investigation of ionospheric plasma variations is carried
Dumbrava Zinaida F., Sivokon Vladimir P., Teslyuk Yuriy A., Khomutov Sergey Y.   +3 more
doaj   +1 more source

Dependence of the F2-layer critical frequency median at midlatitudes on geomagnetic activity

Solar-Terrestrial Physics, 2017
We put forward a method of separating the geomagnetic activity contribution to the F2-layer critical frequency median, foF2med, at middle latitudes. It is based on the analysis of foF2, which is the ratio foF2med/foF2q in percent, where foF2q is the F2 ...
Deminov M.G., Deminova G.F., Depuev V.Kh., Depueva A.Kh.   +3 more
doaj   +1 more source

Synopsis of Mid-latitude Radio Wave Absorption in Europe [PDF]

, 1984
Radio wave absorption data covering almost two years from Europe to Central Asia are presented. They are normalized by relating them to a reference absorption. Every day these normalized data are fitted to a mathematical function of geographical location
Friedrich, M., Torkar, K. M.
core   +1 more source

Recurrent and sporadic Forbush decreases during solar cycles 23–24

Solar-Terrestrial Physics, 2019
A comparison has been made between recurrent (associated with high-speed streams from coronal holes) and sporadic (caused by interplanetary coronal mass ejections (ICMEs)) Forbush decreases (FDs) in solar cycles 23 and 24 (as well as in the maxima of ...
Melkumyan A.A., Belov A.V., Abunina M.A., Abunin A.A., Eroshenko E.A., Oleneva V.A., Yanke V.G.   +6 more
doaj   +1 more source

Radio fiber bursts and fast magnetoacoustic wave trains

, 2012
We present a model for dm-fiber bursts that is based on assuming fast sausage magnetoacoustic wave trains that propagate along a dense vertical filament or current sheet.
Jelínek, P., Karlický, M., Mészárosová, H.   +2 more
core   +1 more source

Deformation-Electromagnetic Relations in Lithospheric Activity Manifestations

E3S Web of Conferences, 2018
It has been shown that dipole radiation of accelerated charges, described by Larmor relation, is the basis of the known mechanic-electromagnetic processes of rock deformation.
Larionov Igor, Malkin Evgeny, Uvarov Vladimir   +2 more
doaj   +1 more source

Barometric effect of neutron component of cosmic rays at Antarctic station «Mirny»

Solar-Terrestrial Physics, 2016
The barometric effect of cosmic ray neutron component was estimated on the example of the Antarctic station Mirny. We used hourly data from continuous monitoring of neutron component and data from a local weather station for 2007–2014.
Kobelev P.G., Аbunin А.А., Аbunina M.А., Preobrazhensky M.S., Smirnov D.V., Lukovnikova А.А.   +5 more
doaj   +1 more source