(Preprint) AAS 16-015 LOW COST SPACECRAFT ATTITUDE
... This process is repeated for each time step and new gyro measurements are included as they become available. Vicon data, and hence simulated star camera measurements, are available at a frequency of 100 Hz. The gyro samples at a rate of 25Hz. This means that for every four star camera measurements t ...
... This process is repeated for each time step and new gyro measurements are included as they become available. Vicon data, and hence simulated star camera measurements, are available at a frequency of 100 Hz. The gyro samples at a rate of 25Hz. This means that for every four star camera measurements t ...
ppt - A century of cosmology
... • Exhaustive spectroscopic and imaging follow-up supports hypothesis that many of lensed Lya emitters are at z~10 but additional follow-up still required. Final confirmation is especially difficult at z>7! • Implied densities of z~9 LAEs still very uncertain, but if correct, would require increase i ...
... • Exhaustive spectroscopic and imaging follow-up supports hypothesis that many of lensed Lya emitters are at z~10 but additional follow-up still required. Final confirmation is especially difficult at z>7! • Implied densities of z~9 LAEs still very uncertain, but if correct, would require increase i ...
solar twins and solar analogues in galactic surveys
... we call a solar twin a star that has the same observed parameters as the Sun within its errors. These stars can be used as stand-in suns when doing observations, as normal night-time telescopes are not built to be pointed at the Sun. There have been many searches for these twins and every one of the ...
... we call a solar twin a star that has the same observed parameters as the Sun within its errors. These stars can be used as stand-in suns when doing observations, as normal night-time telescopes are not built to be pointed at the Sun. There have been many searches for these twins and every one of the ...
GALEX UV Light-curves of M-Dwarf Flare Stars: THE FLARING UV
... • The magnetic field-lines of a star stretch up into their outer atmosphere - the corona - in loop-like structures • When adjacent magnetic field lines “re-connect” (probably due to disturbances within the stellar interior) they release energy in the form of electrons that gyrate down the field line ...
... • The magnetic field-lines of a star stretch up into their outer atmosphere - the corona - in loop-like structures • When adjacent magnetic field lines “re-connect” (probably due to disturbances within the stellar interior) they release energy in the form of electrons that gyrate down the field line ...
Dynamical theory of the solar wind
... extended temperatures lead to equilibria which are subsonic or static. The hypothetical case of a corona with no energy supply other than thermal conduction from its base is considered at some length because the equations may be solved by analytical methods and illustrate the transition from subsoni ...
... extended temperatures lead to equilibria which are subsonic or static. The hypothetical case of a corona with no energy supply other than thermal conduction from its base is considered at some length because the equations may be solved by analytical methods and illustrate the transition from subsoni ...
Testing the evolution of the DB white dwarf GD 358: first results of a
... central oxygen abundance and the shape of the C/O profile affect the pulsation pattern. M1 modified the code to include as free parameters any central oxygen mass fraction (X0 ) between 0 and 1 with resolution 1% and a fractional mass parameter (q). The GA fitting process explored different chemical p ...
... central oxygen abundance and the shape of the C/O profile affect the pulsation pattern. M1 modified the code to include as free parameters any central oxygen mass fraction (X0 ) between 0 and 1 with resolution 1% and a fractional mass parameter (q). The GA fitting process explored different chemical p ...
DOC file
... Ingredients of the fission model: Level densities, assumptions on dynamics, potential fitted to data. Liquid-drop potential: property of CN, favours symmetric fission. Shells: property of fragments (2-center shell model), favour fission channels; vanish with E*. Nuclide distribution: superposition o ...
... Ingredients of the fission model: Level densities, assumptions on dynamics, potential fitted to data. Liquid-drop potential: property of CN, favours symmetric fission. Shells: property of fragments (2-center shell model), favour fission channels; vanish with E*. Nuclide distribution: superposition o ...
ppt - IASF Milano
... assumption about equilibrium required Disadvantages: projection effects and substructure (esp. strong lensing), limited number of background galaxies for analysis of core (weak lensing), only statistical information in outskirts of galaxies/groups X-Rays: Advantages: isotropic pressure tensor, gas f ...
... assumption about equilibrium required Disadvantages: projection effects and substructure (esp. strong lensing), limited number of background galaxies for analysis of core (weak lensing), only statistical information in outskirts of galaxies/groups X-Rays: Advantages: isotropic pressure tensor, gas f ...
EXCITATION OF RADIAL P-MODES IN THE SUN AND STARS ROBERT STEIN
... creases at low frequencies because of increasing mode mass and decreasing mode compressibility. Excitation decreases at high frequencies because convection lacks high frequency motions. Finally, we apply our formula to the excitation of stellar p-mode oscillations using simulations of nine stars nea ...
... creases at low frequencies because of increasing mode mass and decreasing mode compressibility. Excitation decreases at high frequencies because convection lacks high frequency motions. Finally, we apply our formula to the excitation of stellar p-mode oscillations using simulations of nine stars nea ...
Using gamma-rays to probe the clumped structure of stellar winds
... crosses the jet forming an angle Ψ with the center of longer timescales are possible, but the luminosity dethe star, and the viewing angle is θ. creases since the jet expands and hence the proton ...
... crosses the jet forming an angle Ψ with the center of longer timescales are possible, but the luminosity dethe star, and the viewing angle is θ. creases since the jet expands and hence the proton ...
Dark Matter Capture in the first stars
... What happens next? • Outer material accretes onto core – Accretion shock ...
... What happens next? • Outer material accretes onto core – Accretion shock ...
Introduction to HI Paper
... are shown in Figure 5. These systems have been designed to cater for wide-angle optics, with 20o and 70o diameter fields of view, respectively, with good ghost rejection, using radiation tolerant glasses (as indicated by the notation for each lens), to cater for the deep space environment. The HI-1 ...
... are shown in Figure 5. These systems have been designed to cater for wide-angle optics, with 20o and 70o diameter fields of view, respectively, with good ghost rejection, using radiation tolerant glasses (as indicated by the notation for each lens), to cater for the deep space environment. The HI-1 ...
Probing the stability of superheavy dark matter particles with high
... approximately conserved, this symmetry could be broken by physics at very high energies, thus inducing the dark matter decay. This rationale is completely analogous to the proton stability, which can be attributed to a baryon number symmetry but which could nonetheless be broken by new physics at th ...
... approximately conserved, this symmetry could be broken by physics at very high energies, thus inducing the dark matter decay. This rationale is completely analogous to the proton stability, which can be attributed to a baryon number symmetry but which could nonetheless be broken by new physics at th ...
Selected topics in Nuclear Astrophysics
... of the available reaction rates are based on extrapolations of measurements at relatively high energies down to the stellar energy range. For non-resonant reactions the extrapolation can be safely performed in terms of the astrophysical S-factor as this has a weak energy dependence that reflects eff ...
... of the available reaction rates are based on extrapolations of measurements at relatively high energies down to the stellar energy range. For non-resonant reactions the extrapolation can be safely performed in terms of the astrophysical S-factor as this has a weak energy dependence that reflects eff ...
Fifth giant ex-planet of the outer Solar System: characteristics
... Found here the orbital and physical characteristics of this destroyed planet, apparently, can have been directly concerned with the origin of rings Saturn, Uranus, and Neptune. In our opinion, it is necessary to search the origin of rings of Saturn connected with the origin of rings of Uranus, and N ...
... Found here the orbital and physical characteristics of this destroyed planet, apparently, can have been directly concerned with the origin of rings Saturn, Uranus, and Neptune. In our opinion, it is necessary to search the origin of rings of Saturn connected with the origin of rings of Uranus, and N ...
The Sunspots - Scientific Research Publishing
... In the present paper, the theoretical frame work of magneto hydrodynamics (MHD) is used to give a solution of the problem about the origin, persistence and disappearance of the Sunspots; as well as their tendency to appear as bipolar magnetic couples. According to the results obtained, a possible ex ...
... In the present paper, the theoretical frame work of magneto hydrodynamics (MHD) is used to give a solution of the problem about the origin, persistence and disappearance of the Sunspots; as well as their tendency to appear as bipolar magnetic couples. According to the results obtained, a possible ex ...
Brown Dwarfs - The University of Toledo
... Fusion begins, but degeneracy lowers temperature: transition object M ~ 0.075 M Fusion never becomes a significant source of energy: M < 0.07 M. BD is produced. ...
... Fusion begins, but degeneracy lowers temperature: transition object M ~ 0.075 M Fusion never becomes a significant source of energy: M < 0.07 M. BD is produced. ...