The Celestial Sphere If you look out from an empty field into a dark
... position of stars in altitude and azimuth, making it easier for one to find them on the night sky. The celestial sphere is also a natural system for showing the motion of the sun, which always appears to travel parallel to the celestial equator. In order to explore these concepts, however, it is nec ...
... position of stars in altitude and azimuth, making it easier for one to find them on the night sky. The celestial sphere is also a natural system for showing the motion of the sun, which always appears to travel parallel to the celestial equator. In order to explore these concepts, however, it is nec ...
Evidence for wavelength dependence of the scattering phase
... A 25-cm path-length WET Labs AC-9 was used to measure the absorption coefficient (an) and beam attenuation coefficient (cn) of materials other than water at nine wavelengths (10 nm FWHM) across the visible spectrum. Optical blanks for the AC-9 were regularly measured with ultrapure Millipore water t ...
... A 25-cm path-length WET Labs AC-9 was used to measure the absorption coefficient (an) and beam attenuation coefficient (cn) of materials other than water at nine wavelengths (10 nm FWHM) across the visible spectrum. Optical blanks for the AC-9 were regularly measured with ultrapure Millipore water t ...
High Oxygen Pressures and the Stabilization of the Highest
... lies in the gap U between successive redox energies M (n+1)+/n+ and M n+/(n−1)+ , the lower redox couple becomes pinned to the top of the O:2p bands and the effective gap between the pinned redox couple (O 2− : 2p6 ) and the upper couple (M (n+/(n−1)+ ) is referred to as a charge-transfer gap (∆ < ...
... lies in the gap U between successive redox energies M (n+1)+/n+ and M n+/(n−1)+ , the lower redox couple becomes pinned to the top of the O:2p bands and the effective gap between the pinned redox couple (O 2− : 2p6 ) and the upper couple (M (n+/(n−1)+ ) is referred to as a charge-transfer gap (∆ < ...
mm {0.84 M PASS
... selected III-valance semiconductor elements and one or more selected V-valence semiconductor elements. The ...
... selected III-valance semiconductor elements and one or more selected V-valence semiconductor elements. The ...
Detached WD/BD binaries as progenitors of CVs
... • Need to spectroscopically confirm remaining substellar candidates • Determine periods and secondary masses for candidate close binaries – Optical/IR photometric variability c.f. WD0137-349 – Radial velocities of brown dwarfs from Halpha emission (WD0137-349) or near-IR spectroscopy (GD1400) ...
... • Need to spectroscopically confirm remaining substellar candidates • Determine periods and secondary masses for candidate close binaries – Optical/IR photometric variability c.f. WD0137-349 – Radial velocities of brown dwarfs from Halpha emission (WD0137-349) or near-IR spectroscopy (GD1400) ...
Herschel far-infrared observations of the Carina Nebula complex⋆
... For this, the lists of point-like sources detected in each individual Herschel band were matched. The matching radius was chosen as 15 to account for the different angular resolution in the five bands. Starting with the shortest wavelength of 70 μm, i.e. the band with the best angular resolution, e ...
... For this, the lists of point-like sources detected in each individual Herschel band were matched. The matching radius was chosen as 15 to account for the different angular resolution in the five bands. Starting with the shortest wavelength of 70 μm, i.e. the band with the best angular resolution, e ...
light is - msmcgartland
... Light Ray Model Explains the Formation of Shadows • Consider the shadow produced by a point light source. The light rays are given off in all directions from the light source. • Some of the light rays strike an opaque object and are absorbed, forming an umbra behind the object. • The other light ra ...
... Light Ray Model Explains the Formation of Shadows • Consider the shadow produced by a point light source. The light rays are given off in all directions from the light source. • Some of the light rays strike an opaque object and are absorbed, forming an umbra behind the object. • The other light ra ...
Orbital angular momentum of light
... Gaussian beam, two Laguerre-Gaussian beams of higher order with opposite phases. This is a direct consequence of the conservation of angular momentum. Since a Gaussian beam has ` = 0, two LaguerreGaussian beams must be created with opposite `. These two beams travel at an angle with respect to the o ...
... Gaussian beam, two Laguerre-Gaussian beams of higher order with opposite phases. This is a direct consequence of the conservation of angular momentum. Since a Gaussian beam has ` = 0, two LaguerreGaussian beams must be created with opposite `. These two beams travel at an angle with respect to the o ...
Dust formation in the winds of AGBs: the contribution at low
... with an α-enhancement of +0.4, corresponds to [Fe/H] = −2). Dust formation is described by following the growth of dust grains of various types as the wind expands from the stellar surface. Models with mass M ≥ 3 M experience hot bottom burning, thus maintaining the surface C/O below unity. Unlike ...
... with an α-enhancement of +0.4, corresponds to [Fe/H] = −2). Dust formation is described by following the growth of dust grains of various types as the wind expands from the stellar surface. Models with mass M ≥ 3 M experience hot bottom burning, thus maintaining the surface C/O below unity. Unlike ...
Photonics Workshop Program and Worksheets
... Fibre optics is the most rapidly growing portion of optics study in the world. It has grown so dramatically that some people may not think of it as even being part of the optics field. In terms of data communications they could be right, because fibre optic communications utilizes electronic and las ...
... Fibre optics is the most rapidly growing portion of optics study in the world. It has grown so dramatically that some people may not think of it as even being part of the optics field. In terms of data communications they could be right, because fibre optic communications utilizes electronic and las ...
A DESIGN CONCEPT FOR A VERY LARGE ARRAY SKY SURVEY
... and perhaps unwarranted given the reduction in photometric accuracy for extended objects that comes with higher resolution. However, it must be emphasized that good resolution is key. For example, Figure 1 from Hodge et al. (2011) shows that there is important morphological information to be gained ...
... and perhaps unwarranted given the reduction in photometric accuracy for extended objects that comes with higher resolution. However, it must be emphasized that good resolution is key. For example, Figure 1 from Hodge et al. (2011) shows that there is important morphological information to be gained ...
Andromeda: Daughter of Cassiopeia Ἀνδρομέδη Kaitlyn Heaton
... To find the Andromeda Constellation, you must be able to find Pegasus first. That's because Andromeda's face is actually Pegasus's bellybutton (assuming horses have a bellybutton). Andromeda looks like a curvy triangle hanging off the corner of the Great Square (which forms Pegasus's body). This is ...
... To find the Andromeda Constellation, you must be able to find Pegasus first. That's because Andromeda's face is actually Pegasus's bellybutton (assuming horses have a bellybutton). Andromeda looks like a curvy triangle hanging off the corner of the Great Square (which forms Pegasus's body). This is ...
IMCCE - Observer pages
... Lecture provided for amateur and professional astronomers for natural satellite event observations. ...
... Lecture provided for amateur and professional astronomers for natural satellite event observations. ...
feature article
... The calculation of molecular optical two-photon processes (fluorescence and Raman spectra and two-photon absorption) in large anharmonic molecules is one of the fundamental problems in molecular dynamics and spectroscopy. Recent experiments, particularly involving ultracold molecules in supersonic b ...
... The calculation of molecular optical two-photon processes (fluorescence and Raman spectra and two-photon absorption) in large anharmonic molecules is one of the fundamental problems in molecular dynamics and spectroscopy. Recent experiments, particularly involving ultracold molecules in supersonic b ...
SHIFTS: Simulator for the Herschel Imaging Fourier
... scan length produces spectral resolutions up to 0.047 cm−1 . This section outlines the smecMPD module that simulates the mechanical path difference (MPD) of SMEC. SMEC operates in a continuous scan mode at a constant velocity controlled by a digital feedback loop.1 In reality, a constant velocity is ...
... scan length produces spectral resolutions up to 0.047 cm−1 . This section outlines the smecMPD module that simulates the mechanical path difference (MPD) of SMEC. SMEC operates in a continuous scan mode at a constant velocity controlled by a digital feedback loop.1 In reality, a constant velocity is ...
Stellar Lifetimes
... Open cluster: A few thousand loosely packed stars © 2007 Pearson Education Inc., publishing as Pearson Addison-Wesley ...
... Open cluster: A few thousand loosely packed stars © 2007 Pearson Education Inc., publishing as Pearson Addison-Wesley ...
bowser - Colorado Space Grant Consortium
... • Diurnal functioning. • Can focus on multiple objects in the time it takes for HST to observe one • Easy to maintain • May not be as stable of a • HST cost nearly 6 billion platform as HST ...
... • Diurnal functioning. • Can focus on multiple objects in the time it takes for HST to observe one • Easy to maintain • May not be as stable of a • HST cost nearly 6 billion platform as HST ...
The electron temperature of the inner halo of the Planetary Nebula
... spectral type [WC 8]. The P Cygni profiles of, for example, C iv and N iv in its spectrum indicate a terminal wind velocity of V (∞) = 2150 km s−1 (Castor et al. 1981). The chemical abundances in NGC 6543 are likely to be position dependent (Hyung et al. 2000). Its distance is not well known; values ...
... spectral type [WC 8]. The P Cygni profiles of, for example, C iv and N iv in its spectrum indicate a terminal wind velocity of V (∞) = 2150 km s−1 (Castor et al. 1981). The chemical abundances in NGC 6543 are likely to be position dependent (Hyung et al. 2000). Its distance is not well known; values ...
Craig Miles, The Anthropic and Temporal Conditions for the Mormon
... the water will freeze; if it is too close the water will evaporate. Thus, the planet must have a nearly circular orbit at a proper distance from its star. The gravity at the surface of the planet must not be too large or too small. If it is too large, land masses will not rise above the oceans. Even ...
... the water will freeze; if it is too close the water will evaporate. Thus, the planet must have a nearly circular orbit at a proper distance from its star. The gravity at the surface of the planet must not be too large or too small. If it is too large, land masses will not rise above the oceans. Even ...
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.