... Magnetic Storms . ... Cosmic Rays . ... Energetic Particles . ... Solar fast Particles . We cannot observe the way the distant universe accelerates cosmic rays or produces energetic photons, but acceleration processes also occur on our Sun , though on a much more moderate scale. ... That is why such events are often missed by cosmic ray detectors near the equator, where the lowest energies are excluded by the Earth's magnetic field. ... Should we be concerned about solar energetic radiation? ...

... The planets differ greatly in size and properties, and their fields differ too. ... In 1959, after the Earth's radiation belt had been discovered, Frank Drake observed Jupiter and concluded from the relative intensities in a range of wavelengths that the signal was probably emitted by electrons trapped in a strong magnetic field. Then in 1973 the space probe Pioneer 10 passed by Jupiter and found there, sure enough, an enormous planetary magnetic field and a very intense radiation belt. ...

Direct images gallery. Here we have presented some images obtained on SAO telescopes by using SCORPIO. ... NGC 6951 . ... This color image are combined from the frames in the filters V ("blue"), R ("green") and middle-band filter SED755 ("red"). ... The true color image is constructed from three frames in B (Texp=600 sec), V (Texp=480 sec) and R (Texp=400 sec) filters. ... The true color image is constructed from three frames in B (Texp=180 sec), V (Texp=120 sec) and R (Texp=90 sec) filters. ...

Next: C.S. Jeffery, Research Astronomer Up: Research Previous: J.E. Chambers, Research Astronomer Contents . ... We examine spectral time-series of two lower-chromospheric lines observed with SUMER/SOHO (N I and C II ). ... Two examples of explosive events observed with SUMER/SOHO in transition region spectral lines are reported here; one detected in C IV 1548?, in a region within the northern polar coronal hole, and the other in O VI 1032?, in an active region. ...

Russian SHAREABLE DATA CENTER Institute of Solar-Terrestial Physics SB RAS . ... One of the rarest but most interesting effects which can be observed with the Irkutsk IS radar is anomal high power signal registraion(coherent echo) due to strong magnetic storms. ... These signals are formed at E-layer heights in the presence of a strong electric field which causes particles to drift. ...

... One of this year's largest mass ejections from the Sun's atmosphere was recorded last Sunday by TESIS telescopes aboard the CORONAS-PHOTON satellite ( video - wmv 4.3 MB ). ... Over the course of a week, two gigantic solar prominences were simultaneously ejected from the surface of the Sun. ... Earth will not feel the Sun's influence either. ... The TESIS observatory ї TESIS: www.tesis.lebedev.ru . ... One of this year's largest mass ejections from the Sun's atmosphere (movie WMV, 4.3 MB) . ...

... SUN MOON MERCURY VENUS MARS, JUPITER SATURN . ... Mars . ... Previously understood that magnetic fields were directly related to rotation, so when I read that Mars, like Venus, didn't have one, my understanding crumbled. What exactly causes magnetic fields in planets? ... RELATED TOPICS: MAGNETIC FIELD . Planetary magnetic fields are definitely related to rotation, but directly not so much. ... Get instant access to subscriber content on Astronomy.com! ...

Next: The Gravimagnetic Parameter Up: ``Ecology'' of Magnetic Rotators Previous: Nomenclature . ... One can introduce two critical periods and such that their relationship with period p of a magnetic rotator specifies the rotator's type: . ... Instead of , we introduce the potential accretion luminosity L . ... Treating the rotator's magnetic dipole moment and as parameters, we find that an overwhelming majority of the magnetor's stages can be shown on a `` '' diagram (Lipunov 1982a[ 98 ]). ...

... Master . Master net Homepage . ... MASTER-Amur . ... Amb: . Dust: . ... Direct . 23s . ... 45s . ... observed area: . best limit: . Cameras . ... MASTER-Tunka . ... MASTER-Ural . master.kourovka.ru . ... MASTER-Kislovodsk . ... MASTER-Crimea . ... MASTER-SAAO . ... MASTER-IAC . ... MASTER-Argentina . master.sai.msu.ru:8080 . master.sai.msu.ru . ...

The CHIANTI database consists of 4 primary ASCII files for each ion in the database. contains the energy levels in cm^(-1) It includes both experimental data and theoretical values of the levels energies. References: %Observed energy levels (2): Feldman, U., Curdt, W., Landi, E., Wilhelm, K., 2000, ApJ, 544, 508 %Observed energy levels (3,4,5): Sandlin, G.D., Bruekner, G.E., Scherrer, V.E., Tousey, R., 1976, ApJ, 205, L47 %Observed energy levels (6 to 15): Fuhr, J.R., et al., ...

... ATNF Colloquium . The importance of the Earth's atmosphere propagation medium effects on radio astronomical observations . ... These propagation effects are manifested in very distinct fashion depending on the observing frequency. ... In this talk I will present a variety of methods to mitigate the effects of the atmosphere in radio astronomical observations. Furthermore I will address the applicability to various fields of science. ... today * ATNF | ...

. Skip Navigation (press 2) . Home . Research . Tools . Curriculum Vitae . Publications . About Me . The WIRED Survey . ISM Interaction Models . White Dwarf Spectra . Presentation Slides . MIKE Spectra of GALEX J1931+0117 showing the many absorption lines due to metal that is polluting the white dwarf's atmosphere. The metal lines come from dust that is accreting directly on the surface of the white dwarf at the rate of a small asteroid per year. WD 0135-052 . WD 0310-668 .

Next: Rotation Periods of ZAMS stars Previous: T Tauri Stars . ... The first attempts to directly measure periodic modulation of T Tauri stars occurred in the early 1980s. Rydgren & Vrba (1983) observed four PMS stars using photoelectric photometry over a period of seven consecutive photometric nights. ... Because the spot lifetime is much longer than the rotational period, the observed effect will be a modulation of the light from the star synchronously with the rotation period. ...

... Under certain conditions, like those in the nucleus of a QSO, all atoms can be made to emit light at particular wavelengths. ... If that source is approaching the observer, the wave is squashed up onto itself making the wavelength shorter. ... This is redshift. ... You can see how the section of the QSO spectrum which we observe changes with redshift. ... We then see how far we had to slide the observed spectrum along the scale to make it match and that is the objects redshift. ... The 2QZ team . ...

... A2005 Date Received: 2004­Sep­29 18:51:13 Technical Page Proposal Type: Regular General Category: Astronomy Sub­Category: Continuum Observation Category: Galactic Total Time Requested: 42 Hours Proposal Title: The Origin of Magnetic Activity in Sub­Stellar Objects ABSTRACT: The processes of magnetic field generation, amplification and dissipation in sub­stellar objects are not understood, but could provide direct information on the internal convection and the structure of the atmosphere. ...

THE STUDY OF A MAGNETIC FIELD STRUCTURE IN BLAZAR JETS BY OPTICAL PHOTOPOLARIMETRIC DATA Yu.S. Efimov1 , E.Yu. ... Besides the Faraday rotation of p olarization plane there are observational parameters which are connected directly with the intensity of magnetic field and its structure: a p olarization degree and a sp ectral index. ... Moreover, such a comparison allows to follow the variations of the magnetic field intensity from observed variations of p olarization degree and sp ectral index. ...

... The results of radio observations of GRB 080319B in the spectral range of 8.45 GHz are presented. ... Key words: Gamma­rays ­ bursts: observations ­ radio: individual: GRB 080319B 1 Intro duction Gamma­ray bursts (GRBs) are the most luminous explosions currently known in the Universe. ... Smooth angular scanning was used not only in GRB 080319B observations, but to specify the primary standard source radio flux density as well (Kharinov et al., ...

... 8, ``Celestial Mechanics'', 2002 Earth penumbra effects on AES motion taking into account the refraction and the extinction of the light in the atmosphere A. M. Fominov Institute of Applied Astronomy, St. Petersburg, Russia The perturbing acceleration F of the Artificial Earth Satellite (AES) due to the solar ... In step 1, the table of the shadow function values with the angle distances d between the solar disk and the earth disk edge may be calculated. ...

Next: Model of clusters Up: paper2 Previous: paper2 . ... It allows estimating different microphysical properties of scatterers (size, complex refractive index, shape, etc.) from measured characteristics of the scattered radiation. ... The complexity of the direct problem depends on its input parameters characterizing the shape, size and structure of the scattering particle. ... Next: Model of clusters Up: paper2 Previous: paper2 root 2003-04-11 ...