Interference with monochromatic light
... of incidence ϑ. Due to multiple reflection between the mirrors there is an infinite number of beams leaving the device to the right side; they are all laterally displaced by the same amount with respect to their neighbour. We suppose a small angle ϑ, so that the displacement is negligible. There is ...
... of incidence ϑ. Due to multiple reflection between the mirrors there is an infinite number of beams leaving the device to the right side; they are all laterally displaced by the same amount with respect to their neighbour. We suppose a small angle ϑ, so that the displacement is negligible. There is ...
NUCLEOSYNTHESIS
... These lecture notes are intended for an advanced astrophysics course on Nucleosynthesis given at Bonn University. It is based on a course developed at Utrecht University in collaboration with Dr. Onno Pols. These Notes provide a schematic but more or less complete overview of the subject, and as suc ...
... These lecture notes are intended for an advanced astrophysics course on Nucleosynthesis given at Bonn University. It is based on a course developed at Utrecht University in collaboration with Dr. Onno Pols. These Notes provide a schematic but more or less complete overview of the subject, and as suc ...
Starry Night Companion - Starry Night Education
... is 5°. The sides of the Great Square of Pegasus average 15° in length. The distance from one end of the W of Cassiopeia to the other is 13°. The distance from Betelgeuse to Rigel in Orion is 19°, and the length of Orion’s belt is just under 3°. Your hand is a portable angle measurer. The width of yo ...
... is 5°. The sides of the Great Square of Pegasus average 15° in length. The distance from one end of the W of Cassiopeia to the other is 13°. The distance from Betelgeuse to Rigel in Orion is 19°, and the length of Orion’s belt is just under 3°. Your hand is a portable angle measurer. The width of yo ...
Slides
... Ways the CMB is useful for DE: Provides an inventory of virtually everything else in the Universe. Acts as a standard ruler on the surface of last scattering with which we can measure the geometry of the Universe. Some CMB anisotropies are created very recently: Integrated Sachs-Wolfe (ISW) ...
... Ways the CMB is useful for DE: Provides an inventory of virtually everything else in the Universe. Acts as a standard ruler on the surface of last scattering with which we can measure the geometry of the Universe. Some CMB anisotropies are created very recently: Integrated Sachs-Wolfe (ISW) ...
... star, did any of our programme stars show variations during observation exceeding these 1u limits. The photometric precisions determined for the constant field stars are in good agreement with those determined by Aspin, Sandell & Russell (1994). The J and K magnitudes determined for our programme st ...
Galaxy Formation
... • What is the dark matter? • What is the dark energy? • What happened in the first 10 s after the Big Bang? • How, in detail, did stars and galaxies form? • How much farther will the simulations go? ...
... • What is the dark matter? • What is the dark energy? • What happened in the first 10 s after the Big Bang? • How, in detail, did stars and galaxies form? • How much farther will the simulations go? ...
On the Spiral Structure of the Milky Way Galaxy
... A concentration of young clusters and OB associations in the solar neighborhood was detected long ago in three fragments of spiral arms, known as the Carina–Sagittarius, Perseus, and Cygnus– Orion arms (on the history of this problem, see, for example, [5]). There is no doubt that the first two of th ...
... A concentration of young clusters and OB associations in the solar neighborhood was detected long ago in three fragments of spiral arms, known as the Carina–Sagittarius, Perseus, and Cygnus– Orion arms (on the history of this problem, see, for example, [5]). There is no doubt that the first two of th ...
Homework Due
... T = Temperature (of surface, in K) σ = Stefan-Boltzmann constant – just a number to make units work right ...
... T = Temperature (of surface, in K) σ = Stefan-Boltzmann constant – just a number to make units work right ...
Wind-Blown Bubbles around Evolved Stars
... coefficient. This model has been extended to include the effect of expansion in a power-law density distribution and non-spherical (but uniform) expansion by Garcı́a-Segura & Mac Low (1995a), but the same dependence on the similarity variable r/Rs is retained. It has been argued (e.g., Dyson, 1981) ...
... coefficient. This model has been extended to include the effect of expansion in a power-law density distribution and non-spherical (but uniform) expansion by Garcı́a-Segura & Mac Low (1995a), but the same dependence on the similarity variable r/Rs is retained. It has been argued (e.g., Dyson, 1981) ...
PSCWest Orientation - GBT
... • The pulsar story will be told by our astronomers next time • We will look at and review the electromagnetic spectrum, frequency, period, etc. ...
... • The pulsar story will be told by our astronomers next time • We will look at and review the electromagnetic spectrum, frequency, period, etc. ...
Adaptive secondary mirrors
... – Size on sky has to be diffraction limit of a WFS sub-aperture • Laser guide stars have PROS and CONS: – Pluses: can put them anywhere, can be bright – Minuses: NGS give better AO performance than LGS even when both are working perfectly. High-powered lasers are tricky to build and work with. Las ...
... – Size on sky has to be diffraction limit of a WFS sub-aperture • Laser guide stars have PROS and CONS: – Pluses: can put them anywhere, can be bright – Minuses: NGS give better AO performance than LGS even when both are working perfectly. High-powered lasers are tricky to build and work with. Las ...
Numerical Star-Formation Studies-
... apply these numerical schemes to real astrophysical problems. It is this integrated view of stellar birth that is at the heart of this review. Our goal is to provide an overview of the recent advances in star formation theory with a special focus on the numerical aspects of the problem. We do not ai ...
... apply these numerical schemes to real astrophysical problems. It is this integrated view of stellar birth that is at the heart of this review. Our goal is to provide an overview of the recent advances in star formation theory with a special focus on the numerical aspects of the problem. We do not ai ...
Abundance Patterns and Star Formation
... The Milky Way, typical or not? It is always regarded that the MWG is the typical spiral in the universe, especially at its mass range. Is this true? How about M31 galaxy, it is a spiral that is comparable with MWG in the Local Group, and now it is possible to have detailed observations. ...
... The Milky Way, typical or not? It is always regarded that the MWG is the typical spiral in the universe, especially at its mass range. Is this true? How about M31 galaxy, it is a spiral that is comparable with MWG in the Local Group, and now it is possible to have detailed observations. ...
CEA - The Sun
... 300,000 kilometers per second and than 100 times the light emitted by the Sun requires only eight minutes to reach our planet, the radius of the whereas light from the next nearest Earth) and a mass star to us, Proxima Centauri (a distance of 4.2 light-years from the 330,000 times Earth), takes more ...
... 300,000 kilometers per second and than 100 times the light emitted by the Sun requires only eight minutes to reach our planet, the radius of the whereas light from the next nearest Earth) and a mass star to us, Proxima Centauri (a distance of 4.2 light-years from the 330,000 times Earth), takes more ...
Growth and characterization of Urea Lead nitrate
... ULN crystals are belongs to hexagonal system. From the absorption spectrum, the optical band gap energy is found to be 4.32 eV. The low value of dielectric loss (εr) at high frequencies suggests that the sample possess enhanced optical quality with lesser defects and this parameter is of vital impor ...
... ULN crystals are belongs to hexagonal system. From the absorption spectrum, the optical band gap energy is found to be 4.32 eV. The low value of dielectric loss (εr) at high frequencies suggests that the sample possess enhanced optical quality with lesser defects and this parameter is of vital impor ...
The PAH emission spectra of Large Magellanic Cloud H II regions
... investigate the differences – if any – in the PAH spectra between Galactic and Magellanic Cloud H ii regions. Here we want to study variations in the relative strength of the PAH bands to each other, not the differences in absolute intensities due to intrinsic luminosity and distance of the sources. ...
... investigate the differences – if any – in the PAH spectra between Galactic and Magellanic Cloud H ii regions. Here we want to study variations in the relative strength of the PAH bands to each other, not the differences in absolute intensities due to intrinsic luminosity and distance of the sources. ...
TS2
... Rays of light in the core, striking the interface with the cladding, are completely reflected. The wave nature of light dictates that guidance occurs only at certain angles, i.e., that only a small number of discrete “modes” can form. If only one mode exists, the fiber is known as “single mode.” In ...
... Rays of light in the core, striking the interface with the cladding, are completely reflected. The wave nature of light dictates that guidance occurs only at certain angles, i.e., that only a small number of discrete “modes” can form. If only one mode exists, the fiber is known as “single mode.” In ...
fulltext (9)
... were synthesized, including silver (Ag) (Huang et al. 2004), gold (Au). (Esumi et al. 2003; Huang et al. 2005; Huang et al. 2004), platinum (Pt) (Huang et al. 2004), and palladium (Pd) (Huang et al. 2004) by the reduction of corresponding metal cations with NaBH4 in the presence of chitosan as the s ...
... were synthesized, including silver (Ag) (Huang et al. 2004), gold (Au). (Esumi et al. 2003; Huang et al. 2005; Huang et al. 2004), platinum (Pt) (Huang et al. 2004), and palladium (Pd) (Huang et al. 2004) by the reduction of corresponding metal cations with NaBH4 in the presence of chitosan as the s ...
INDEPENDENT STUDY Astronomy.cwk (DR)
... They are the one-stop-shopping places for learning all about the nature and variety of stars. Clusters are unique, as all their stars were born at about the same time, from the same material & are about the same distance away. DVD #13: “Another Earth”, The UNIVERSE (season 3) Could we be unique in t ...
... They are the one-stop-shopping places for learning all about the nature and variety of stars. Clusters are unique, as all their stars were born at about the same time, from the same material & are about the same distance away. DVD #13: “Another Earth”, The UNIVERSE (season 3) Could we be unique in t ...
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.