CPW
... stars formed from the same cloud of gas and dust, but that chemical composiAon varies among stars formed from different clouds of gas and dust. Student 2 would most likely agree with which of ...
... stars formed from the same cloud of gas and dust, but that chemical composiAon varies among stars formed from different clouds of gas and dust. Student 2 would most likely agree with which of ...
YAA Activity Book - MicroObservatory
... This activity was designed to be an introductory activity for anyone with little or no background in astronomy, to peak interest and to begin a discussion using some of the language of astronomy. A key concept is that astronomy has influence outside the field of science. Astronomy actually plays a m ...
... This activity was designed to be an introductory activity for anyone with little or no background in astronomy, to peak interest and to begin a discussion using some of the language of astronomy. A key concept is that astronomy has influence outside the field of science. Astronomy actually plays a m ...
Holography
... object, and hologram are not on the same axis anymore. The hologram represents the outer area of a fresnel zone lens. Again a virtual and a real image are formed during construction. The advantage of off-axis holography is that both images do not interfere during observation and image disturbances a ...
... object, and hologram are not on the same axis anymore. The hologram represents the outer area of a fresnel zone lens. Again a virtual and a real image are formed during construction. The advantage of off-axis holography is that both images do not interfere during observation and image disturbances a ...
Brightest Stars : Discovering the Universe Through the Sky`s Most
... to teach them about the most outstanding individual stars, using those stars as powerful exemplars. One could do this by selecting the most technically interesting stars, even ones so distant or hidden that the largest amateur telescope could never show them. But the best form of learning is learnin ...
... to teach them about the most outstanding individual stars, using those stars as powerful exemplars. One could do this by selecting the most technically interesting stars, even ones so distant or hidden that the largest amateur telescope could never show them. But the best form of learning is learnin ...
X-ray spectra of highly magnetized neutron stars in binary systems
... whole surface of the neutron star, but from one or two hot spots. This again revealed another striking feature of neutron stars: magnetic fields with a strength B of the order of ∼1012 G. These magnetic fields disrupt the accretion flow and funnel the material along the magnetic field lines to the m ...
... whole surface of the neutron star, but from one or two hot spots. This again revealed another striking feature of neutron stars: magnetic fields with a strength B of the order of ∼1012 G. These magnetic fields disrupt the accretion flow and funnel the material along the magnetic field lines to the m ...
Measuring and Modelling Light Scattering in Paper
... This thesis is about measuring and modelling light reflected from paper by using goniophotometric measurements. Measuring bidirectional reflectance requires highly accurate instruments, and a large part of the work in this thesis is about establishing the requirements that must be fulfilled to ensur ...
... This thesis is about measuring and modelling light reflected from paper by using goniophotometric measurements. Measuring bidirectional reflectance requires highly accurate instruments, and a large part of the work in this thesis is about establishing the requirements that must be fulfilled to ensur ...
Solex110
... velocities) or as classical osculating elements. The solar system starting conditions are read from the last-called library (or from DE406 if the option is called at startup), but if the bodies are satellites, the solar system is limited to the planets from Venus to Saturn and to the Moon. The defau ...
... velocities) or as classical osculating elements. The solar system starting conditions are read from the last-called library (or from DE406 if the option is called at startup), but if the bodies are satellites, the solar system is limited to the planets from Venus to Saturn and to the Moon. The defau ...
Intense, ultrashort light and dense, hot matter
... as shown in figure 2. This enhances the power of the beam. Today we routinely produce pulses as short as a few femtoseconds and the frontier has ‘shrunk’ to the attosecond (10−18 s) level. Obviously the peak powers accessed by the lasers have grown by many orders of magnitude. 2. Light–matter intera ...
... as shown in figure 2. This enhances the power of the beam. Today we routinely produce pulses as short as a few femtoseconds and the frontier has ‘shrunk’ to the attosecond (10−18 s) level. Obviously the peak powers accessed by the lasers have grown by many orders of magnitude. 2. Light–matter intera ...
Formation of binary alloy cluster ions from group
... because the elements of group 14 can form alloys with many metal and non-metal elements. Transition metal silicides and germanides are potential materials for solid-state electronic devices. Binary T/Ge and ternary T/Ge/Si alloys (where T is a transition metal) are currently receiving much attention ...
... because the elements of group 14 can form alloys with many metal and non-metal elements. Transition metal silicides and germanides are potential materials for solid-state electronic devices. Binary T/Ge and ternary T/Ge/Si alloys (where T is a transition metal) are currently receiving much attention ...
Few-cycle terahertz generation and spectroscopy of nanostructures
... has recently been demonstrated (Sarakura et al . 1997). A saturable Bragg reflector (SBR) with a single quantum well (SQW) as a saturable absorber was employed. The radiation was generated by means of quantum beats in the quantum well. More efficient intracavity THz generation was obtained when the SQW ...
... has recently been demonstrated (Sarakura et al . 1997). A saturable Bragg reflector (SBR) with a single quantum well (SQW) as a saturable absorber was employed. The radiation was generated by means of quantum beats in the quantum well. More efficient intracavity THz generation was obtained when the SQW ...
Statistics of gamma-ray point sources below the Fermi detection limit
... e.g., Colombi et al. (2011) and references therein. In this paper, we extend the prior analysis (Slatyer & Finkbeiner 2010) and use the points in cells statistics to understand the population of gamma-ray point sources. In a larger context, the problem is to separate different sources of gamma-ray em ...
... e.g., Colombi et al. (2011) and references therein. In this paper, we extend the prior analysis (Slatyer & Finkbeiner 2010) and use the points in cells statistics to understand the population of gamma-ray point sources. In a larger context, the problem is to separate different sources of gamma-ray em ...
On the Difference between Seeing and Image Quality: When the
... We attempt to clarify the frequent confusion between seeing and image quality for large telescopes. The full width at half maximum of a stellar image is commonly considered to be equal to the atmospheric seeing. However the outer scale of the turbulence, which corresponds to a reduction in the low f ...
... We attempt to clarify the frequent confusion between seeing and image quality for large telescopes. The full width at half maximum of a stellar image is commonly considered to be equal to the atmospheric seeing. However the outer scale of the turbulence, which corresponds to a reduction in the low f ...
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... Phenomena related to light propagation in optically inhomogeneous media are being studied for many purposes. Amongst them, the medical applications occupy a special place, since it has been proven that scattering of optical radiation can be used as a noninvasive investigation tool. Remarkable advanc ...
... Phenomena related to light propagation in optically inhomogeneous media are being studied for many purposes. Amongst them, the medical applications occupy a special place, since it has been proven that scattering of optical radiation can be used as a noninvasive investigation tool. Remarkable advanc ...
H i AND CO IN BLUE COMPACT DWARF GALAXIES: HARO 2 AND
... led many BCDs to be classified as H ii galaxies (although, in general, not all H ii galaxies are necessary dwarf systems). At their current star formation rates (SFRs), these systems would exhaust their total available gas in considerably less than a Hubble time; for this reason, it is generally acc ...
... led many BCDs to be classified as H ii galaxies (although, in general, not all H ii galaxies are necessary dwarf systems). At their current star formation rates (SFRs), these systems would exhaust their total available gas in considerably less than a Hubble time; for this reason, it is generally acc ...
Numerical solution of the radiative transfer equation: X
... Comptonization region is τ > ∼ 1. The regime of low temperature and high optical depth of the plasma indeed ensures that the spectrum is almost isotropized, so that it is possible to use ...
... Comptonization region is τ > ∼ 1. The regime of low temperature and high optical depth of the plasma indeed ensures that the spectrum is almost isotropized, so that it is possible to use ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.