spaceweb@oulu.fi - last update: 1 July 1998, 1200 UT (RR) . ... Relates the wave number k to the wave frequency. ... From the equation of motion , m d v /dt = q( v x B ) one can calculate that, in a presence of magnetic field B , a charged particle is accelerated in direction perpendicular to both v (perp) and B . ... The angle a between magnetic field B and velocity vector of a charged particle, v ., i.e., sin a = v(perp) / v(total), where v(perp) refers to the velocity component perpendicular to B . ...

... Mass . ... Charge . ... Constants . ... Euler's constant: = 0.5772156649 . ... Planck constant: h = 6.62620 ? ... Elementary charge: e = 1.602189 ? ... Universal gas constant: R = 8.31441 J mol -1 K -1 . Boltzmann's constant: k = R/N 0 = 1.380662 ? ... Gravitation constant: G = 6.6742 ? ... Solar radius: R = 6.9599 ? ... Solar mass: M = 1.989 ? ... 1 statute mile = 5280 ft = 1609 m . ... 1 solar mass (M ) = 1.989 ? ... 1 elementary charge (e) = 1.602189 ? ... Copyright 2006 Mario van den Ancker. ...

Next: Polarization efficiency: size/shape/orientation effects Up: Optical properties of cosmic Previous: The 2175? feature . To model the interstellar polarization one needs to calculate the forward-transmitted radiation for an ensemble of non-spherical aligned dust grains. ... Let non-polarized stellar radiation passes through a dusty cloud with a homogeneous magnetic field. ... The angle between the line of sight and the magnetic field is ( ). ... where the angle is connected with and ( ). ...

... 458 ­ 461 Magnetic Variability of the Ap Star HD 9996 Bychkov V. D.1 , Bychkova L. V.1 , Madej J.2 , Shatilov A. V.1 1 2 Special Astrophysical Observatory, Nizhny Arkhyz, Russia Warsaw University Observatory, Poland Abstract. ... Its phase magnetic curve exhibits two components. ... 1 Long­Perio d Magnetic Phase Curve Compilation of early photometric measurements of HD 9996 allowed us to constrain the corresponding period P in the range of 7750 < Pph < 8550 days (Pyper & Adelman, 1986). ...

... 205Clarke+ J/MNRAS/190/205 Magnetic fields in radio sources (Clarke+ 1980) ================================================================================ Evidence for the magnetic-field orientation in extragalactic radio sources Clarke J.N., Kronberg P.P, Simard-Normandin M. =11% and PA~90 or ~0d are almost always classical doubles with narrow, collinear structure, while sources with lower p_max OR intermediate PA tend to have off-axis structure. ...

... The Magnetic Carpet Of The Sun . ... Credit: SOHO Consortium , ESA , NASA Explanation: The Sun has a magnetic carpet . Its visible surface appears to be carpeted with tens of thousands of magnetic north and south poles joined by looping field lines which extend outward into the Solar Corona . ... A close-up of the Solar surface is illustrated in the inset. ... Publications with keywords: Sun - corona - magnetic field . Publications with words: Sun - corona - magnetic field . ...

... Files in red?history) . ... Magnetic Field . ... It was believed that the inside of the Earth was magnetized in the same fashion, and scientists were greatly puzzled when they found that the direction of the compass needle at any place slowly shifted, decade by decade, suggesting a slow variation of the Earth's magnetic field. ... Andr -Marie Amp re in France felt that if a current in a wire exerted a magnetic force on a compass needle, two such wires also should interact magnetically. ...

... November 6, 1997 . The Magnetic Carpet Of The Sun . Credit: SOHO Consortium , ESA , NASA . Explanation: The Sun has a magnetic carpet . Its visible surface appears to be carpeted with tens of thousands of magnetic north and south poles joined by looping field lines which extend outward into the Solar Corona . ... A close-up of the Solar surface is illustrated in the inset. ... About APOD > . ... NASA Technical Rep.: ... A service of: LHEA at NASA / GSFC . ...

Next: Optical and other high Up: An overview Previous: The magnetic fields of . ... Individual pulses very variable in intensity . Stable profile if several hundred pulses added . Strongly linearly polarised . Monotonic polarisation position angle swing through the pulse implies the origin is near a magnetic pole . Much more complex polarisation characteristic in msps indicating more complex field . ... Thu Dec 19 15:15:11 GMT 1996 ...

Magnetic stars, 2004,225-229 Averaged magnetic phase curves. ... ANALYSIS OF THE CATALOG 227 4 3 N stars 2 1 -4000 -3000 -2000 -1000 0 1000 2000 B0 (G) Figure 3: Number distribution of stars vs. coeffcient B0 for those stars which exhibit a magnetic phase curve with a double wave. of a magnetic star can occur if the angle between the magnetic and rotational axes is small or even zero. ... The catalog lists phase curves for 139 stars, 134 of them are magnetic Ap stars. ...

... Other Characteristics of the Sun: Variability of Rotation, Magnetism, Chemical Structure, Planetary System. ... Methods of Solar Magnetic Fields Measuring: Visual, Photografic, Photoelectric. ... Empiric Datas of Magnetic Fields in Photosphere, Chromosphere and Corona. ... Characteristics of Magnetic Field in Balanced Force Tubes by Potential and Forceless Field. ... Phenomenons in Active Region (Magnetic Field, Spots, Torches, Solar Prominences, Flares, Discharges. ... Magnetic Fields in Flares. ...

... 2004. ... Carbonneau P., Dikpati M. Stochastic fluctuations in a Babcock-Leighton model of solar cycle // Astrophys. ... Erofeev D.V. An observational evidence for the Babcock-Leighton dynamo scenario. ... Langcope D.W., Fisher G.H. The effect of convection zone turbulence on the tilt angles of magnetic bipoles // Astrophys. ... Dikpati M., Charbonneau P. A Babcock-Leighton flux transport dynamo with solar-like differential rotation. ... Axial tilt angles of sunspot groups // Solar Phys. 1999. ...

... 66 45' 11.1" West . Latitude (astronomical) . ... Longitude (astronomical) . ... Declination range . ... 0.4 deg/s, 1440 deg/hour . ... 0.04 deg/s, 144.0 deg/hour . ... Magnetic declination . ... Height of reflector center of curvature above MSL . ... Fixed reflector, movable feeds . Diameter of reflector . ... Area of aperture . ... Radius of curvature . ... 1 One Kelvin/Jansky (K/Jy) corresponds to 2761 m 2 effective aperture. ...

. The frequency of the spectral maximum f m of the gyrosynchrotron emission vs. the power-law index of the electron spectrum calculated according to Dulk & Marsh (1982). Curves are shown for various column densities LNe of accelerated electrons and magnetic field strengths B . The angle between the line of sight and the magnetic field is 45 degree.

... Oblique rotators: rotational losses and temporal evolution of the inclination angle . I will present an exact solution of the problem of the plasma flow from the surface of the oblique rotator with an initially split-monopole magnetic field. The connection of this model with more realistic model of radio pulsars with an initially dipole magnetic field will be discussed. ... The temporal evolution of the inclination angle will be discussed. ...

Next: The Evolution of the HST Archive . ... Up: Data Archives . ... The data archive for the Large Angle Spectrometric Coronagraph (LASCO) and the Extreme Ultraviolet Imaging Telescope (EIT) is designed to contain 1 B of image data in an easy to use CD-R based archive. ... The only disadvantages are that CD-Rs are much slower to access than magnetic disks and require several hours to assemble a CD-ROM image and write the CD-Rs. ... Large CD-ROM jukeboxes meant that all of our data could be on-line. ...

... May 27, 2009 - The CORONAS-PHOTON has registered the formation of the Sun's southern belt of activity . The Russian TESIS/ CORONAS-PHOTON Solar Observatory, which has been working in orbit since January 30th, 2009, has photographed one of the most important events in the build up to the upcoming solar cycle - the formation of our star's new southern belt of activity. The first magnetic fields of the new cycle in the southern hemisphere appeared on the Sun's surface on May 23-24th. ...

Modelling the effects of FR II radio jets on the turbulent magnetic fields in the intra-cluster medium Mar tМn Huar te Espinosa , Mar tin Krause, Paul Alexander and Christian R. Kaiser. ... The plasma relaxes for a crossing time (118 Myr) and then we inject mass and x-momentum to a central control cylinder and experiment with the jets power: velociB µG RM maps We calculate RM= 812 dl rad m-2 from the jets' con3 tact discontinuity to the end of the domain along different viewing angles. ...

... New High Contrast Coronagraphic locations for STIS provide inner working angles of ~0.2" . ... News and . ... The smallest of these supported positions is at WEDGEA0.6, corresponding to an inner working angle of ~0.3". ... These new positions allow high contrast imaging at a minimum inner working angle of 0.15", with demonstrated performance to ~0.2"--roughly 3 lambda/D, and close to a factor of two better than WEDGEA0.6. ... http://www.stsci.edu/hst/stis/strategies/pushing/coronagraphic_bars . ...

... This study reveals for the first time the existence of bi-directional jets, which are a signature of magnetic reconnection, occurring along coronal hole (CH) boundaries. ... K) emission lines in an equatorial extension of a polar coronal hole, known as the ``Elephant's Trunk'' coronal hole, show small regions of a few arc-seconds size with strong blue- and red-shifted emission reaching Doppler shifts of up to 150km s, i.e. bi-directional jets. ...