Volcanoes and Igneous Activity Earth - Chapter 4
... • Dark center, the umbra, surrounded by a lighter region, the penumbra • Dark color is due to a cooler temperature (1500 K less than the solar surface) • Follow an 11-year cycle • Large spots are strongly magnetized • Pairs have opposite magnetic poles ...
... • Dark center, the umbra, surrounded by a lighter region, the penumbra • Dark color is due to a cooler temperature (1500 K less than the solar surface) • Follow an 11-year cycle • Large spots are strongly magnetized • Pairs have opposite magnetic poles ...
the Sun - My CCSD
... • Dark center, the umbra, surrounded by a lighter region, the penumbra • Dark color is due to a cooler temperature (1500 K less than the solar surface) • Follow an 11-year cycle • Large spots are strongly magnetized • Pairs have opposite magnetic poles ...
... • Dark center, the umbra, surrounded by a lighter region, the penumbra • Dark color is due to a cooler temperature (1500 K less than the solar surface) • Follow an 11-year cycle • Large spots are strongly magnetized • Pairs have opposite magnetic poles ...
Coronal magnetic topology and the production of solar impulsive
... Solar impulsive energetic electrons (SIEEs) are one population of solar energetic particles (SEPs) produced by the rapid release of magnetic energy on the Sun. In situ observations (Lin 1985; Reames 1999) show that SIEEs are in close association with type III radio bursts. In some cases, the SIEEs a ...
... Solar impulsive energetic electrons (SIEEs) are one population of solar energetic particles (SEPs) produced by the rapid release of magnetic energy on the Sun. In situ observations (Lin 1985; Reames 1999) show that SIEEs are in close association with type III radio bursts. In some cases, the SIEEs a ...
Solar Surface Magneto-Convection
... Long time scale (how long?) Seed field from dispersal of active regions dependence on solar cycle ...
... Long time scale (how long?) Seed field from dispersal of active regions dependence on solar cycle ...
6S06pp_L28 - University of Iowa Physics
... naturally magnetic • a piece of loadstone will attract bits of iron • a magnet produces a magnetic field in the space around it, just like the Sun produces a gravitational field that holds the planets in their orbits • the magnetic field can be ...
... naturally magnetic • a piece of loadstone will attract bits of iron • a magnet produces a magnetic field in the space around it, just like the Sun produces a gravitational field that holds the planets in their orbits • the magnetic field can be ...
The Sun: Our Closest Star and a Nuclear Fusion Reactor
... Corona. This region is where the hot gases are flowing out into space. It is the bright gaseous edge of the Sun only visible during a solar eclipse. Gases that flow further out into space from the corona are called the solar wind. ...
... Corona. This region is where the hot gases are flowing out into space. It is the bright gaseous edge of the Sun only visible during a solar eclipse. Gases that flow further out into space from the corona are called the solar wind. ...
Garden-Variety Star - Wayne State University Physics and Astronomy
... It is known to be very hot because it contains multiply ionized atoms At very high temperatures, atoms like iron can have 9 to 13 electrons ejected (the atoms become ionized) 9-times ionized iron is only produced at a temperature of 1.3 million K 13-times ionized iron means the temperature gets up t ...
... It is known to be very hot because it contains multiply ionized atoms At very high temperatures, atoms like iron can have 9 to 13 electrons ejected (the atoms become ionized) 9-times ionized iron is only produced at a temperature of 1.3 million K 13-times ionized iron means the temperature gets up t ...
![L 28 Electricity and Magnetism [5]](http://s1.studyres.com/store/data/011852183_1-c97ca7607285c5132adb7a0644e408eb-300x300.png)
L 28 Electricity and Magnetism [5]
... inclined about 14° from the its molten core geographic north pole, or by about 600 miles. ...
... inclined about 14° from the its molten core geographic north pole, or by about 600 miles. ...
Homework #3
... point on its equator goes around once every 26.8 days, but a point at 75 degrees latitude (either north or south) takes 31.8 days to go around. In 10 years, how many more times has the Sun rotated at its equator than at 75 degrees latitude? 5) List the three kinds of gas pressure discussed in class. ...
... point on its equator goes around once every 26.8 days, but a point at 75 degrees latitude (either north or south) takes 31.8 days to go around. In 10 years, how many more times has the Sun rotated at its equator than at 75 degrees latitude? 5) List the three kinds of gas pressure discussed in class. ...
Investigation of mass flows in the transition region and corona in a
... which is the basis of our search for the origin of the line shifts. The vertical velocity obtained when weighting the velocity by the density squared is shown to be almost identical to the corresponding Doppler shift. Therefore, a direct comparison between Doppler shifts and the model parameters is ...
... which is the basis of our search for the origin of the line shifts. The vertical velocity obtained when weighting the velocity by the density squared is shown to be almost identical to the corresponding Doppler shift. Therefore, a direct comparison between Doppler shifts and the model parameters is ...
causes of solar activity - The National Academies of Sciences
... 5. Some phenomena are intrinsically periodic such as the magnetic activity cycle. We still do not have enough well-observed periods or the proper kinds of observations to understand the degree to which the cycle is quasi-periodic or chaotic. 4.1. Origins of Solar Activity Our understanding of solar ...
... 5. Some phenomena are intrinsically periodic such as the magnetic activity cycle. We still do not have enough well-observed periods or the proper kinds of observations to understand the degree to which the cycle is quasi-periodic or chaotic. 4.1. Origins of Solar Activity Our understanding of solar ...
Space weather has a long history because it
... 1942 AD - S.E. Forbush detects 'GLE' radiation burst from a solar flare. 1947 AD - World-wide radio blackout. Airlines affected in Ireland 1947 AD - Giovanelli proposes that solar flares related to solar magnetic changes. 1949 AD - Reber detects radio burst before flare is detected by telescopes. 19 ...
... 1942 AD - S.E. Forbush detects 'GLE' radiation burst from a solar flare. 1947 AD - World-wide radio blackout. Airlines affected in Ireland 1947 AD - Giovanelli proposes that solar flares related to solar magnetic changes. 1949 AD - Reber detects radio burst before flare is detected by telescopes. 19 ...
re0317original97
... so that RE J 0317-853 has one of the strongest magnetic fields detected on white dwarfs. High speed photometry has shown that the optical brightness of RE J 0317-853 varies almost sinusoidal with a period of 725 sec and an amplitude of more that 0.1 magnitudes. The only possible explanation was rota ...
... so that RE J 0317-853 has one of the strongest magnetic fields detected on white dwarfs. High speed photometry has shown that the optical brightness of RE J 0317-853 varies almost sinusoidal with a period of 725 sec and an amplitude of more that 0.1 magnitudes. The only possible explanation was rota ...
Color of stars from hottest to coolest White The size of
... Photosphere -Sphere of light. lt is 340 miles deep. lt is the surface , and the part of the sun we see. ...
... Photosphere -Sphere of light. lt is 340 miles deep. lt is the surface , and the part of the sun we see. ...
Stellar Evolution and our Sun (Song “The Sun” from “Severe Tire
... photons are being absorbed, so at outer edges of zone, heat does not transfer out Convection Zone energy flow dominated by convection this region is very dense, so it takes a long time for photons to travel through it (about 170,000 yrs form energy to travel 696,000 km from core to surface) Energy f ...
... photons are being absorbed, so at outer edges of zone, heat does not transfer out Convection Zone energy flow dominated by convection this region is very dense, so it takes a long time for photons to travel through it (about 170,000 yrs form energy to travel 696,000 km from core to surface) Energy f ...
Document
... Solar neutrinos Helioseismology Theory! (use of general physical concepts and principles, conservation of energy or mass, chemical composition, magnetic or centrifugal forces, …) ...
... Solar neutrinos Helioseismology Theory! (use of general physical concepts and principles, conservation of energy or mass, chemical composition, magnetic or centrifugal forces, …) ...
stars - Chatt
... BLACK HOLE • These are stars thirty times bigger than our Sun. • Small, very dense object with an extremely strong gravitational pull. • Nothing can escape from it; not even light. ...
... BLACK HOLE • These are stars thirty times bigger than our Sun. • Small, very dense object with an extremely strong gravitational pull. • Nothing can escape from it; not even light. ...
Standard Solar/Stellar Model
... The interior of the Sun can be “observed” by its oscillations in brightness, size, and velocity on surface. 5-minute oscillation: a quasiTrapped acoustic waves sinusoidal radial variation in the velocity field with an amplitude of a few hundred m/s and period of 5 min, produced by trapped acoustic w ...
... The interior of the Sun can be “observed” by its oscillations in brightness, size, and velocity on surface. 5-minute oscillation: a quasiTrapped acoustic waves sinusoidal radial variation in the velocity field with an amplitude of a few hundred m/s and period of 5 min, produced by trapped acoustic w ...
Sun 1 - Prescott Astronomy Club
... orthodontist appointment and observed a bright ruby-red glow in the NNE section of the sky. The glow stretched from the horizon to approximately the "W" of the constellation Cassiopeia and was about 30 to 40 degrees wide. Also, there were a couple of vertical 'zones' in the glow. The glow could be o ...
... orthodontist appointment and observed a bright ruby-red glow in the NNE section of the sky. The glow stretched from the horizon to approximately the "W" of the constellation Cassiopeia and was about 30 to 40 degrees wide. Also, there were a couple of vertical 'zones' in the glow. The glow could be o ...
Tuesday, October 28th "The Formation and Evolution of Galaxies"
... Raman Prinja is a Professor of Astrophysics at University College London, where he conducts research on massive stars in our Galaxy. The recipient of several awards, he has received the Royal Academy of Belgium’s Pol and Christiane Swings research prize and the faculty and departmental teaching awar ...
... Raman Prinja is a Professor of Astrophysics at University College London, where he conducts research on massive stars in our Galaxy. The recipient of several awards, he has received the Royal Academy of Belgium’s Pol and Christiane Swings research prize and the faculty and departmental teaching awar ...
Post-class version
... can absorb or emit light at those wavelengths (only). • Degree of blackness of each line is related to amount of each element present in gas producing spectrum. It’s also related to the temperature and density of the gas, so the analysis is complicated. ...
... can absorb or emit light at those wavelengths (only). • Degree of blackness of each line is related to amount of each element present in gas producing spectrum. It’s also related to the temperature and density of the gas, so the analysis is complicated. ...
Announcements
... the Sun’s core will contract, causing it to heat up the fusion rate will increase to balance higher gravity a new equilibrium is reached for stability at a higher energy output the Sun’s luminosity increases with time over the long-term ...
... the Sun’s core will contract, causing it to heat up the fusion rate will increase to balance higher gravity a new equilibrium is reached for stability at a higher energy output the Sun’s luminosity increases with time over the long-term ...
Corona
A corona (Latin, 'crown') is an aura of plasma that surrounds the sun and other celestial bodies. The Sun's corona extends millions of kilometres into space and is most easily seen during a total solar eclipse, but it is also observable with a coronagraph. The word ""corona"" is a Latin word meaning ""crown"", from the Ancient Greek κορώνη (korōnē, “garland, wreath”).The high temperature of the Sun's corona gives it unusual spectral features, which led some in the 19th century to suggest that it contained a previously unknown element, ""coronium"". Instead, these spectral features have since been explained by highly ionized iron (Fe-XIV). Bengt Edlén, following the work of Grotrian (1939), first identified the coronal lines in 1940 (observed since 1869) as transitions from low-lying metastable levels of the ground configuration of highly ionised metals (the green Fe-XIV line at 5303 Å, but also the red line Fe-X at 6374 Å). These high stages of ionisation indicate a plasma temperature in excess of 1,000,000 kelvin, much hotter than the surface of the sun.Light from the corona comes from three primary sources, which are called by different names although all of them share the same volume of space. The K-corona (K for kontinuierlich, ""continuous"" in German) is created by sunlight scattering off free electrons; Doppler broadening of the reflected photospheric absorption lines completely obscures them, giving the spectral appearance of a continuum with no absorption lines. The F-corona (F for Fraunhofer) is created by sunlight bouncing off dust particles, and is observable because its light contains the Fraunhofer absorption lines that are seen in raw sunlight; the F-corona extends to very high elongation angles from the Sun, where it is called the zodiacal light. The E-corona (E for emission) is due to spectral emission lines produced by ions that are present in the coronal plasma; it may be observed in broad or forbidden or hot spectral emission lines and is the main source of information about the corona's composition.