National Institute of Standards and Technology, Boulder
... because it is now very well determined) Whitehead parameter: solar system -- milky way interaction Nordvedt parameter: effect of a third massive body on gravitational interaction of two bodies (violation of strong equivalence principle) Total number of parameters: 9+3+6=18 ...
... because it is now very well determined) Whitehead parameter: solar system -- milky way interaction Nordvedt parameter: effect of a third massive body on gravitational interaction of two bodies (violation of strong equivalence principle) Total number of parameters: 9+3+6=18 ...
Theory of pulsar winds and nebulae - Max-Planck
... the wavelength of the radiation that would be emitted by the pulsar in vacuum is 2πrL . In the terminology of radiating systems, the region within the light cylinder is, therefore, the “near zone”, where the fields can be approximated as being in rigid corotation. Conventionally, this region is call ...
... the wavelength of the radiation that would be emitted by the pulsar in vacuum is 2πrL . In the terminology of radiating systems, the region within the light cylinder is, therefore, the “near zone”, where the fields can be approximated as being in rigid corotation. Conventionally, this region is call ...
icso2000_picard
... generated by Solar observing requires a careful cooling of the SiC mirrors because of the residual gradients Straylight effects have been sized (see the excellent P. Echeto poster) We thank the CNES who made these small missions a reality well suited for scientific needs by its coherent possibilitie ...
... generated by Solar observing requires a careful cooling of the SiC mirrors because of the residual gradients Straylight effects have been sized (see the excellent P. Echeto poster) We thank the CNES who made these small missions a reality well suited for scientific needs by its coherent possibilitie ...
(2004) - H. Peter
... higher “filling-factor” than Sun? not enough space on the surface and: also stellar X-rays are structured stellar corona are not only brighter, they have also high densities high temperatures ...
... higher “filling-factor” than Sun? not enough space on the surface and: also stellar X-rays are structured stellar corona are not only brighter, they have also high densities high temperatures ...
talk-tutorial - Helioseismic and Magnetic Imager
... The paucity of active regions near the equator could result from deflection toward the poles by the Coriolis force (low B), or from a lack of stable solutions (high B) Hale’s law and Joy’s law (active region orientation) can be reproduced with thin flux tube models, in which Coriolis forces balance ...
... The paucity of active regions near the equator could result from deflection toward the poles by the Coriolis force (low B), or from a lack of stable solutions (high B) Hale’s law and Joy’s law (active region orientation) can be reproduced with thin flux tube models, in which Coriolis forces balance ...
galactic cosmic radiation and solar energetic particles
... exposure to galactic cosmic radiation in space at sunspot minimum is - 4 protons cm 2 s' resulting in a yearly integrated exposure of - 1.3 x 108 protons/cm2. The isotropic flux exposure to galactic cosmic radiation at sunspot maximum is - 2 protons cm-2 s-' resulting in a yearly integrated exposure ...
... exposure to galactic cosmic radiation in space at sunspot minimum is - 4 protons cm 2 s' resulting in a yearly integrated exposure of - 1.3 x 108 protons/cm2. The isotropic flux exposure to galactic cosmic radiation at sunspot maximum is - 2 protons cm-2 s-' resulting in a yearly integrated exposure ...
ASTR 1 Syllabus - Penn Physics
... Syllabus suggestions for Bennett et al’s The Cosmic Perspective, 3/e. In addition to the media assets listed below, the web site includes many self-assessment tools for each chapter, such as summaries, quizzes, electronic version of the end-of-chapter questions, flashcards and suggested web links. N ...
... Syllabus suggestions for Bennett et al’s The Cosmic Perspective, 3/e. In addition to the media assets listed below, the web site includes many self-assessment tools for each chapter, such as summaries, quizzes, electronic version of the end-of-chapter questions, flashcards and suggested web links. N ...
Can Comets Contain Water?
... If we assume a poor IR emitter and/or a surface topography (crevice) gives 45o view of sky: 1/6 emissions = 5.1 AU (Jupiter) • And R-T would move this heat into the comet. ...
... If we assume a poor IR emitter and/or a surface topography (crevice) gives 45o view of sky: 1/6 emissions = 5.1 AU (Jupiter) • And R-T would move this heat into the comet. ...
History and Science Motivation for the Van Allen Probes Mission
... and compared with observed energization timescales, and a reasonable match has been achieved.22 However, this and other hypotheses need further testing. In view of recent observations (Ref. 24) and theoretical studies (Refs. 25 and 26), the role of large amplitude waves interacting in a highly nonl ...
... and compared with observed energization timescales, and a reasonable match has been achieved.22 However, this and other hypotheses need further testing. In view of recent observations (Ref. 24) and theoretical studies (Refs. 25 and 26), the role of large amplitude waves interacting in a highly nonl ...
Measuring Noble Gases in Coma Samples from
... released was well within background, indicating that if cometary Ne is indeed trapped within particles in flight aerogel, it should be possible to detect it. Samples S1, S2, and S3 were fragments of a Stardust particle track wall, containing melted aerogel and potentially fragments of the original i ...
... released was well within background, indicating that if cometary Ne is indeed trapped within particles in flight aerogel, it should be possible to detect it. Samples S1, S2, and S3 were fragments of a Stardust particle track wall, containing melted aerogel and potentially fragments of the original i ...
Are Planetary Systems Filled to Capacity
... planets, particularly Mars and Mercury, are more vigorously tossed about. The simulations show that over millions of years the terrestrial planets undergo substantial excursions in their eccentricities—large enough for those planets to clear out any debris from the intervening orbital space, but not ...
... planets, particularly Mars and Mercury, are more vigorously tossed about. The simulations show that over millions of years the terrestrial planets undergo substantial excursions in their eccentricities—large enough for those planets to clear out any debris from the intervening orbital space, but not ...
On the origin of stars with and without planets
... either on the evolutionary stage of the star or on its age3 . In Fig. 1 we plot the T c slope against the stellar age. The plot and Table 1 clearly show that the correlation with age is quite significant and confirms the result obtained for the surface gravity: old stars are more depleted in refract ...
... either on the evolutionary stage of the star or on its age3 . In Fig. 1 we plot the T c slope against the stellar age. The plot and Table 1 clearly show that the correlation with age is quite significant and confirms the result obtained for the surface gravity: old stars are more depleted in refract ...
Effects of Thomson-Scattering Geometry on White-Light
... inner heliosphere is not only determined by the local electron density, but also by Thomsonscattering theory. The Thomson-scattering geometry is defined by a sphere, on which the Sun and the observer are located on opposite ends of the diameter. The classical theory of Thomson scattering by Billings ...
... inner heliosphere is not only determined by the local electron density, but also by Thomsonscattering theory. The Thomson-scattering geometry is defined by a sphere, on which the Sun and the observer are located on opposite ends of the diameter. The classical theory of Thomson scattering by Billings ...
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... sensitivity and noise introduced by high-energy particles. The MGS/ER reflectometer is ...
... sensitivity and noise introduced by high-energy particles. The MGS/ER reflectometer is ...
Discovery Of A Magnetic Field In The O9 Sub-Giant Star HD
... lines that are blended with the hydrogen lines were excluded. This resulted in approximately 165 relatively pure photospheric lines used for the creation of the mean, normalized Stokes I , V and diagnostic null (N) profiles, yielding an increase in the Stokes V S/N by a factor of ∼7.5. All LSD profi ...
... lines that are blended with the hydrogen lines were excluded. This resulted in approximately 165 relatively pure photospheric lines used for the creation of the mean, normalized Stokes I , V and diagnostic null (N) profiles, yielding an increase in the Stokes V S/N by a factor of ∼7.5. All LSD profi ...
Mysterious Mercury
... to the Sun. A further of Mercury’s many peculiarities is found by Gordon Pettengill5 with the help of the giant 304.8 m diameter Arecibo radar telescope in Puerto Rico in 1965. He recognizes Mercury’s 3 : 2 spin/orbit resonance, meaning that whilst Mercury orbits the Sun twice, it rotates around it ...
... to the Sun. A further of Mercury’s many peculiarities is found by Gordon Pettengill5 with the help of the giant 304.8 m diameter Arecibo radar telescope in Puerto Rico in 1965. He recognizes Mercury’s 3 : 2 spin/orbit resonance, meaning that whilst Mercury orbits the Sun twice, it rotates around it ...
ASTRONOMY AND ASTROPHYSICS Numerical simulations of stellar winds: polytropic models
... before every time step, we could get steady-state solutions where ...
... before every time step, we could get steady-state solutions where ...
Current Systems in Planetary Magnetospheres and Ionospheres
... field is, on average, at a low inclination to the ecliptic plane, the current sheet mid plane tends to be orthogonal or at a high inclination to the planet’s orbital plane. The induced magnetotail is very long and extends downtail dozens of planetary radii. 1.6 Magnetic Configurations in the Environ ...
... field is, on average, at a low inclination to the ecliptic plane, the current sheet mid plane tends to be orthogonal or at a high inclination to the planet’s orbital plane. The induced magnetotail is very long and extends downtail dozens of planetary radii. 1.6 Magnetic Configurations in the Environ ...
2 Technology Overview
... constructed between 1984 and 1990 by Luz International in the California Mojave Desert, constitute the world’s largest solar power plant with a total capacity of 354 MW. They all use parabolic trough collectors, and their continuous successful operation for the last 20 plus years up until now has de ...
... constructed between 1984 and 1990 by Luz International in the California Mojave Desert, constitute the world’s largest solar power plant with a total capacity of 354 MW. They all use parabolic trough collectors, and their continuous successful operation for the last 20 plus years up until now has de ...
in PDF format
... More often they show a pronounced bipolar shape. Balick (?) proposed that such forms arise due to an interaction between a very fast tenuous outflow, the ‘last gasp’ of the star, and a disk-shaped denser atmosphere left over from an earlier slow phase of mass loss. Analytical (Icke ?, Icke et al. ?) ...
... More often they show a pronounced bipolar shape. Balick (?) proposed that such forms arise due to an interaction between a very fast tenuous outflow, the ‘last gasp’ of the star, and a disk-shaped denser atmosphere left over from an earlier slow phase of mass loss. Analytical (Icke ?, Icke et al. ?) ...
X-Ray and Extreme Ultraviolet Emission from Comets
... Max-Planck-Institut für Extraterrestrische Physik ...
... Max-Planck-Institut für Extraterrestrische Physik ...
Lecture01-ASTA01 - University of Toronto
... from a spatial perspective to give you a sense of the immensity of the universe and how small our little corner of it really is. • Equally important is that you gain an appreciation for the concept of time and how the average human lifetime, for instance, compares to the age of the universe. ...
... from a spatial perspective to give you a sense of the immensity of the universe and how small our little corner of it really is. • Equally important is that you gain an appreciation for the concept of time and how the average human lifetime, for instance, compares to the age of the universe. ...
Surface temperatures at the nearside of the Moon as a
... Understanding the balance between incoming radiation from the Sun and outgoing radiation from Earth is of critical importance in the study of climate change on Earth. As the only natural satellite of Earth, the Moon is a unique platform for the study of the disk-wide radiation budget of Earth. There ...
... Understanding the balance between incoming radiation from the Sun and outgoing radiation from Earth is of critical importance in the study of climate change on Earth. As the only natural satellite of Earth, the Moon is a unique platform for the study of the disk-wide radiation budget of Earth. There ...
The edge of the solar system - Beck-Shop
... blinked plates covering some 90000 square degrees of sky.† All in all he spent some 7000 hours scanning every square millimetre of about 75 square metres of plate surface. Although he marked 3969 asteroids, 1807 variable stars and discovered a comet, he never found another object as distant as Pluto ...
... blinked plates covering some 90000 square degrees of sky.† All in all he spent some 7000 hours scanning every square millimetre of about 75 square metres of plate surface. Although he marked 3969 asteroids, 1807 variable stars and discovered a comet, he never found another object as distant as Pluto ...
Kamiokande and Super-Kamiokande Results on Neutrino
... Super-K: Expected number of events Neutrino flux and energy spectrum from Livermore simulation (T.Totani, K.Sato, H.E.Dalhed and J.R.Wilson, ApJ.496,216(1998)) ...
... Super-K: Expected number of events Neutrino flux and energy spectrum from Livermore simulation (T.Totani, K.Sato, H.E.Dalhed and J.R.Wilson, ApJ.496,216(1998)) ...
Solar wind
The solar wind is a stream of charged particles released from the upper atmosphere of the Sun. This plasma consists of mostly electrons, protons and alpha particles with energies usually between 1.5 and 10 keV; embedded in the solar-wind plasma is the interplanetary magnetic field. The solar wind varies in density, temperature and speed over time and over solar longitude. Its particles can escape the Sun's gravity because of their high energy, from the high temperature of the corona and magnetic, electrical and electromagnetic phenomena in it.The solar wind flows outward supersonically to great distances, filling a region known as the heliosphere, an enormous bubble-like volume surrounded by the interstellar medium. Other related phenomena include the aurora (northern and southern lights), the plasma tails of comets that always point away from the Sun, and geomagnetic storms that can change the direction of magnetic field lines and create strong currents in power grids on Earth.