Calibration of a ground-based solar coronal polarimeter
... converter, can sometimes give incorrect readings. Some days, all readings can look good; some days, all can look bad, and some days have a mixture. The calibration scheme is to look at the sky transmission telescope readings over the course of the whole day and an extinction curve is plotted (with o ...
... converter, can sometimes give incorrect readings. Some days, all readings can look good; some days, all can look bad, and some days have a mixture. The calibration scheme is to look at the sky transmission telescope readings over the course of the whole day and an extinction curve is plotted (with o ...
Regular Changes in the Fine Structure of Histograms Revealed in
... lyze the shape of “inconsistent” histograms [33, 34] — distri- In this case, the expert knows nothing about the histograms butions of the results of consecutive measurements, the num- compared. Using this approach, we checked all the principal ber of which is comparable with the selected number of d ...
... lyze the shape of “inconsistent” histograms [33, 34] — distri- In this case, the expert knows nothing about the histograms butions of the results of consecutive measurements, the num- compared. Using this approach, we checked all the principal ber of which is comparable with the selected number of d ...
Eric Feng - Physics 335 Poster
... Two trigger counters sandwiched the MBTS counter and were used as a cosmic telescope to select cosmic rays passing through it (Fig. 2). The MBTS counter was read out with Tile Calorimeter electronics. The signal out of the trigger cable was measured with additional electronics, including a pulse hei ...
... Two trigger counters sandwiched the MBTS counter and were used as a cosmic telescope to select cosmic rays passing through it (Fig. 2). The MBTS counter was read out with Tile Calorimeter electronics. The signal out of the trigger cable was measured with additional electronics, including a pulse hei ...
Neutrino Sources and Detectors
... still left over from the Big Bang around us. This section looks at some of the source of neutrinos and methods we use to detect them. ...
... still left over from the Big Bang around us. This section looks at some of the source of neutrinos and methods we use to detect them. ...
The Formation of Planetary Systems
... gas clouds, fallen meteorites, and Earth’s Moon, as well as of the various planets observed with ground-based telescopes and planetary space probes. Ironically, studies of Earth itself do not help much, because information about our planet’s early stages eroded away long ago. Meteorites and comets p ...
... gas clouds, fallen meteorites, and Earth’s Moon, as well as of the various planets observed with ground-based telescopes and planetary space probes. Ironically, studies of Earth itself do not help much, because information about our planet’s early stages eroded away long ago. Meteorites and comets p ...
Determining the mass loss limit for close
... that the extreme XUV exposed and hydrodynamically expanding thermospheres of “Hot Jupiters” will also have a strong ionizing component, which may expand the ionopause up to distances where the ion pick up process could be less effective as suggested by Khodachenko et al. (2007). The aim of this pape ...
... that the extreme XUV exposed and hydrodynamically expanding thermospheres of “Hot Jupiters” will also have a strong ionizing component, which may expand the ionopause up to distances where the ion pick up process could be less effective as suggested by Khodachenko et al. (2007). The aim of this pape ...
The isotopic mixture of barium in the metal-poor
... such as turbulent motions and the stellar rotation. We use model atmospheres and our high-resolution spectra to constrain the stellar contributions to the line profile. The isotopic and hyperfine splittings have been measured by laboratory spectroscopists. Rutten (1978) collated the measurements. Mc ...
... such as turbulent motions and the stellar rotation. We use model atmospheres and our high-resolution spectra to constrain the stellar contributions to the line profile. The isotopic and hyperfine splittings have been measured by laboratory spectroscopists. Rutten (1978) collated the measurements. Mc ...
Determination of the distance to the Andromeda Galaxy using variable stars U
... up similarities and differences between solar and stellar flares is to continuously broaden the ensemble of analyzed flares (solar and stellar as well), thus making an observational base of different types of flaring activities available for theoretical purposes. This is how solar flare observations c ...
... up similarities and differences between solar and stellar flares is to continuously broaden the ensemble of analyzed flares (solar and stellar as well), thus making an observational base of different types of flaring activities available for theoretical purposes. This is how solar flare observations c ...
the role of comets in panspermia - ORCA
... typical location in interstellar space, over a fraction of a million years. Within the solar system it is possibly in the range 10-45 Mrad per million years and depends on the distance from the sun and the phase of solar activity, highest at times near the peak of the solar sunspot cycle. Such doses ...
... typical location in interstellar space, over a fraction of a million years. Within the solar system it is possibly in the range 10-45 Mrad per million years and depends on the distance from the sun and the phase of solar activity, highest at times near the peak of the solar sunspot cycle. Such doses ...
sporadic solar radio emission at decameter wavelengths
... lanes similar to the ones at higher frequencies. The most important feature were fine structure in form of sub-bursts drifting towards lower and higher frequencies. This may mean that electrons were accelerated from the shock front in opposite directions, i.e. they moved towards and outwards the Sun ...
... lanes similar to the ones at higher frequencies. The most important feature were fine structure in form of sub-bursts drifting towards lower and higher frequencies. This may mean that electrons were accelerated from the shock front in opposite directions, i.e. they moved towards and outwards the Sun ...
Budinoff_3-14
... Preliminary launch packaging concept developed for “LV27.3” vehicle based on December 2005 ESAS report – TMST can be packaged into a single launch element Ø7.5m x 32.2 m, ~200mT – TMST cannot be packaged into a single LV27.3 • PL bay Ø7.5m x 12.5m • 2 LV23 LAUNCHES MAY BE ABLE TO LIFT TMST ...
... Preliminary launch packaging concept developed for “LV27.3” vehicle based on December 2005 ESAS report – TMST can be packaged into a single launch element Ø7.5m x 32.2 m, ~200mT – TMST cannot be packaged into a single LV27.3 • PL bay Ø7.5m x 12.5m • 2 LV23 LAUNCHES MAY BE ABLE TO LIFT TMST ...
Gamma-ray burst investigation via polarimetry and spectroscopy
... above 2.5 μm are too faint by many magnitudes for 8–10 m telescopes. Thus, a completely different strategy is needed to step beyond redshift 13 to measure when the first stars formed. Fortunately, nuclear physics offers such a new strategy. Similar to X-ray and optical absorption lines due to transi ...
... above 2.5 μm are too faint by many magnitudes for 8–10 m telescopes. Thus, a completely different strategy is needed to step beyond redshift 13 to measure when the first stars formed. Fortunately, nuclear physics offers such a new strategy. Similar to X-ray and optical absorption lines due to transi ...
CORONAL EVOLUTION OF THE SUN IN TIME: HIGH
... and Chandra, offers entirely new access to stellar coronal physics by providing high-resolution X-ray spectroscopy with considerable sensitivity. Apart from more detailed studies of the thermal stratification, they also allow us to derive the coronal abundances of individual elements and to measure ...
... and Chandra, offers entirely new access to stellar coronal physics by providing high-resolution X-ray spectroscopy with considerable sensitivity. Apart from more detailed studies of the thermal stratification, they also allow us to derive the coronal abundances of individual elements and to measure ...
- Spiral - Imperial College London
... based on the extrapolation of the empirical dependences introduced in Sect. 3. In Sect. 6 we employ this model to explain the observed patterns of stellar variability. Finally, we summarise our main results in Sect. 7. ...
... based on the extrapolation of the empirical dependences introduced in Sect. 3. In Sect. 6 we employ this model to explain the observed patterns of stellar variability. Finally, we summarise our main results in Sect. 7. ...
COMETS
... substances from the nucleus. The CO+ found in plasma tails may derive from CO in the clathrate lattice or from the breakdown of a more complex molecule. Polymerized formaldehyde may explain why the surface of Halley’s comet is so dark (albedo is about 0.04). If this overall view is correct, then the ...
... substances from the nucleus. The CO+ found in plasma tails may derive from CO in the clathrate lattice or from the breakdown of a more complex molecule. Polymerized formaldehyde may explain why the surface of Halley’s comet is so dark (albedo is about 0.04). If this overall view is correct, then the ...
Fluorine abundances in dwarf stars of the solar neighbourhood⋆
... Very Large Telescope on Cerro Paranal observatory to observe nine cool main-sequence dwarfs of the solar neighbourhood. The resolving power of the spectra was R ∼ 50 000 and the exposure times were chosen to achieve a signal-to-noise ratio (S/N) larger than 200. The reduction and calibration of the ...
... Very Large Telescope on Cerro Paranal observatory to observe nine cool main-sequence dwarfs of the solar neighbourhood. The resolving power of the spectra was R ∼ 50 000 and the exposure times were chosen to achieve a signal-to-noise ratio (S/N) larger than 200. The reduction and calibration of the ...
Meteorites and the Early Solar System
... On 6 October 2008, a small asteroid was discovered with a flat reflectance spectrum in the 554–995 nm wavelength range, and designated 2008 TC3. It subsequently hit the Earth. Because it exploded at 37 km altitude, no macroscopic fragments were expected to survive. A dedicated search along the appr ...
... On 6 October 2008, a small asteroid was discovered with a flat reflectance spectrum in the 554–995 nm wavelength range, and designated 2008 TC3. It subsequently hit the Earth. Because it exploded at 37 km altitude, no macroscopic fragments were expected to survive. A dedicated search along the appr ...
Module3: Life of a Star
... Use real scientific data and scientific method to investigate a hypothesis and present your findings. Practise communication skill when presenting your results to the group. ...
... Use real scientific data and scientific method to investigate a hypothesis and present your findings. Practise communication skill when presenting your results to the group. ...
Venus express: Highlights of the nominal mission - HAL
... orbit. In particular, fundamental problems in the fields of atmospheric structure and composition, morphology and distribution of clouds and hazes, atmospheric dynamics, properties of plasma and magnetic field, and escape processes, are all addressed by the Venus Express observations. These investig ...
... orbit. In particular, fundamental problems in the fields of atmospheric structure and composition, morphology and distribution of clouds and hazes, atmospheric dynamics, properties of plasma and magnetic field, and escape processes, are all addressed by the Venus Express observations. These investig ...
Advanced Composition Explorer
Advanced Composition Explorer (ACE) is a NASA Explorers program Solar and space exploration mission to study matter comprising energetic particles from the solar wind, the interplanetary medium, and other sources. Real-time data from ACE is used by the NOAA Space Weather Prediction Center to improve forecasts and warnings of solar storms. The ACE robotic spacecraft was launched August 25, 1997 and entered a Lissajous orbit close to the L1 Lagrangian point (which lies between the Sun and the Earth at a distance of some 1.5 million km from the latter) on December 12, 1997. The spacecraft is currently operating at that orbit. Because ACE is in a non-Keplerian orbit, and has regular station-keeping maneuvers, the orbital parameters at right are only approximate. The spacecraft is still in generally good condition in 2015, and is projected to have enough fuel to maintain its orbit until 2024. NASA Goddard Space Flight Center managed the development and integration of the ACE spacecraft.