Optically polarized atoms_ch_4
... If, instead of light, we had a right-handed wood screw, it would move opposite to the light propagation direction ...
... If, instead of light, we had a right-handed wood screw, it would move opposite to the light propagation direction ...
In situ Raman Spectroscopic Study of Supported Molten Salt
... role in a number of industrial processes, which due to the associated sulfur oxide emissions have significant environmental impact. Although the main source of SO2 emissions to the atmosphere is the coal-fired power generation, large amounts of SO2 are also emitted from sulfuric acid manufacturers a ...
... role in a number of industrial processes, which due to the associated sulfur oxide emissions have significant environmental impact. Although the main source of SO2 emissions to the atmosphere is the coal-fired power generation, large amounts of SO2 are also emitted from sulfuric acid manufacturers a ...
Slide 1
... • hp-DGFEM uses completely discontinuous finite element spaces, hence we can easily deal with elements of various shape and order. ...
... • hp-DGFEM uses completely discontinuous finite element spaces, hence we can easily deal with elements of various shape and order. ...
Transparencies - Rencontres de Moriond
... • Astrometry : 0".16 (Tycho sources) • 0.5-7 keV : diffuse emission + 119 point sources • One source coincident with SgrA* within 0".27 ...
... • Astrometry : 0".16 (Tycho sources) • 0.5-7 keV : diffuse emission + 119 point sources • One source coincident with SgrA* within 0".27 ...
Evaluating Gaia performances on eclipsing binaries
... and by Patkós & Hempelmann (1994). Consequently we include in the analysis only the radial velocity curve of the hotter, more luminous component. This means that, from our data, the mass ratio is not independently determined by spectroscopic means, and its determination must depend on the curvature ...
... and by Patkós & Hempelmann (1994). Consequently we include in the analysis only the radial velocity curve of the hotter, more luminous component. This means that, from our data, the mass ratio is not independently determined by spectroscopic means, and its determination must depend on the curvature ...
Search for giant planets in M67 III: excess of Hot Jupiters in dense
... explain the larger frequency of HJs in these clusters, but this is not the case of M67, which has a well established solar metallicity and abundance pattern (Randich et al. 2005). The hypothesis that the high frequency of HJs in M67 or in OCs in general originates from the larger mass of the host st ...
... explain the larger frequency of HJs in these clusters, but this is not the case of M67, which has a well established solar metallicity and abundance pattern (Randich et al. 2005). The hypothesis that the high frequency of HJs in M67 or in OCs in general originates from the larger mass of the host st ...
The European Large Area ISO Survey – IV. The preliminary 90
... function defined below and are excluded from the luminosity function analysis. Two galaxies (ELAISP90_J003721-434228 and ELAISP90_J003021-423657) are Seyfert 2 galaxies, and two further galaxies (ELAISP90_J003431-433806 and ELAISP90_ J003133-425100) have an early-type spectrum; all the remainder (in ...
... function defined below and are excluded from the luminosity function analysis. Two galaxies (ELAISP90_J003721-434228 and ELAISP90_J003021-423657) are Seyfert 2 galaxies, and two further galaxies (ELAISP90_J003431-433806 and ELAISP90_ J003133-425100) have an early-type spectrum; all the remainder (in ...
Sunstruck
... universe. Recent discoveries have shown, however, that there are many more red dwarf stars than expected. This makes our star brighter than about 85% of all stars. This shouldn’t be taken to mean it is close to the brightest stars out there. In fact, the brightest (and most massive) known star, R136 ...
... universe. Recent discoveries have shown, however, that there are many more red dwarf stars than expected. This makes our star brighter than about 85% of all stars. This shouldn’t be taken to mean it is close to the brightest stars out there. In fact, the brightest (and most massive) known star, R136 ...
Asymptotic Giant Branch stars viewed up-close and far-off
... burning has occurred. This first dredge-up mixes up material enriched in 4 He, and 14 N and 13 C to the surface. The change in the surface abundance ratio of 12 C/13 C is from ≈ 90 to ≈ 20 (Charbonnel 1994). The helium core continues to contract. Eventually, helium ignites through the triple-alpha p ...
... burning has occurred. This first dredge-up mixes up material enriched in 4 He, and 14 N and 13 C to the surface. The change in the surface abundance ratio of 12 C/13 C is from ≈ 90 to ≈ 20 (Charbonnel 1994). The helium core continues to contract. Eventually, helium ignites through the triple-alpha p ...
VII-3
... media without obstacles Huygens’ principle gives us the same results as ray (geometrical) optics including effects as reflection and refraction. • However, when there is e.g. an obstacle then wave fronts will be not only distorted but new effects of interference and diffraction will appear. There wi ...
... media without obstacles Huygens’ principle gives us the same results as ray (geometrical) optics including effects as reflection and refraction. • However, when there is e.g. an obstacle then wave fronts will be not only distorted but new effects of interference and diffraction will appear. There wi ...
Astronomy 5682 Problem Set 6: Supernova Cosmology Due
... class) that relates “luminosity distance” to the value of Ω0 . You don’t need to solve the integral that enters this formula, but you should describe about how changing the value of Ω0 influences the value of the integral. The value of Ω0 enters into this argument both through its effect on a(t) and ...
... class) that relates “luminosity distance” to the value of Ω0 . You don’t need to solve the integral that enters this formula, but you should describe about how changing the value of Ω0 influences the value of the integral. The value of Ω0 enters into this argument both through its effect on a(t) and ...
What About Astrology? - The Evangelization Station
... strength of its influence from time to time. Yet most astrologers do not take these important considerations into account. And all astrologers forget that the light we see from heavenly bodies indicates only apparent location. All stars—many of which are billions upon billions of miles away—only app ...
... strength of its influence from time to time. Yet most astrologers do not take these important considerations into account. And all astrologers forget that the light we see from heavenly bodies indicates only apparent location. All stars—many of which are billions upon billions of miles away—only app ...
IGR J18483-0311: a new intermediate supergiant fast X
... period. They also derived a periodicity of about 21.05 s in the JEM-X light curve of the first outburst, which is likely a neutron star pulse period. Finally, from archival Swift observations, the authors obtained a very accurate position of IGR J18483−0311, which allowed them to pinpoint its USNO B ...
... period. They also derived a periodicity of about 21.05 s in the JEM-X light curve of the first outburst, which is likely a neutron star pulse period. Finally, from archival Swift observations, the authors obtained a very accurate position of IGR J18483−0311, which allowed them to pinpoint its USNO B ...
Homework #2 1. There are two ways to estimate the energy carried
... longer than the gravitational free-fall time of the cloud, tf f ≈ 1/ Ghρi, where hρi is the mean density of the cloud. What happens if tKH < tf f ? b) Estimate the critical radius Rc (in R ) at which tKH ≈ tf f , i.e, at which KH contraction begins, for a given cloud of mass M (in M ). Assume, as ...
... longer than the gravitational free-fall time of the cloud, tf f ≈ 1/ Ghρi, where hρi is the mean density of the cloud. What happens if tKH < tf f ? b) Estimate the critical radius Rc (in R ) at which tKH ≈ tf f , i.e, at which KH contraction begins, for a given cloud of mass M (in M ). Assume, as ...
Reprocessing the Hipparcos data of evolved stars
... Establishment of P–L relationships for nearby LPVs is difficult, however. Even after Hipparcos (ESA 1997) there are relatively few well determined parallaxes for these rare, luminous stars, and their use requires attention to statistical biases (cf. Arenou & Luri 1999). Several studies have assumed ...
... Establishment of P–L relationships for nearby LPVs is difficult, however. Even after Hipparcos (ESA 1997) there are relatively few well determined parallaxes for these rare, luminous stars, and their use requires attention to statistical biases (cf. Arenou & Luri 1999). Several studies have assumed ...
Next Lecture
... o Power from source crossing normal to unit area at specified location a distance D from source o f = L/4πD 2 if source isotropic, no absorption o Units: egs s−1 cm−2 • Specific Intensity (or “surface brightness”) (I) o Power from source crossing unit area at specified location and moving into unit ...
... o Power from source crossing normal to unit area at specified location a distance D from source o f = L/4πD 2 if source isotropic, no absorption o Units: egs s−1 cm−2 • Specific Intensity (or “surface brightness”) (I) o Power from source crossing unit area at specified location and moving into unit ...
Photo-induced metal–ligand bond weakening, potential
... tetragonal splitting parameter. The ‘g’ subscripts that appear with the states on the right side of Fig. 1 are valid under D4h symmetry. Under C46 symmetry the g subscript is dropped. The actual order in any particular complex must either be determined experimentally (for example by using single cry ...
... tetragonal splitting parameter. The ‘g’ subscripts that appear with the states on the right side of Fig. 1 are valid under D4h symmetry. Under C46 symmetry the g subscript is dropped. The actual order in any particular complex must either be determined experimentally (for example by using single cry ...
Planet-finding Activity Guide How do we find planets around other
... Direct Imaging/Starlight Suppression – Have your audience pretend to be a telescope staring at the star. Hold the star so that the view of the planet is not obstructed and so that it does not appear to be transiting the star. Have participants hold their thumb out in front of their view to block ...
... Direct Imaging/Starlight Suppression – Have your audience pretend to be a telescope staring at the star. Hold the star so that the view of the planet is not obstructed and so that it does not appear to be transiting the star. Have participants hold their thumb out in front of their view to block ...
Be stars: one ring to rule them all
... Be stars are fast, though under-critical, rotators (Frémat et al. 2005). Comparing the angular momentum per unit mass in a disc at Keplerian rotation J = (GM∗ R)1/2 and at a distance R from the star to that at the stellar surface, assumed at critical rotation (Keplerian too), J∗ = (GM∗ R∗ )1/2 , we ...
... Be stars are fast, though under-critical, rotators (Frémat et al. 2005). Comparing the angular momentum per unit mass in a disc at Keplerian rotation J = (GM∗ R)1/2 and at a distance R from the star to that at the stellar surface, assumed at critical rotation (Keplerian too), J∗ = (GM∗ R∗ )1/2 , we ...
Dublin - University of Warwick
... tmin ~ R*3/2 MBH1/2 Duration of event: WD = hours MS = months - years RG = decades - centuries ...
... tmin ~ R*3/2 MBH1/2 Duration of event: WD = hours MS = months - years RG = decades - centuries ...
Lectures Part 7 - John Boccio Website
... it balances out gravity. Outer part becomes Red Giant and then diffuses into space while Inner part stabilizes → white dwarf. Hot core creates heavy elements . It can shine for quite awhile - why call it “white”. Really dense: object with mass of Sun shrunk to size of Earth - why call it a “dwarf”. ...
... it balances out gravity. Outer part becomes Red Giant and then diffuses into space while Inner part stabilizes → white dwarf. Hot core creates heavy elements . It can shine for quite awhile - why call it “white”. Really dense: object with mass of Sun shrunk to size of Earth - why call it a “dwarf”. ...
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.