How laser works
... 1023 photons to be precise. As the photons encounter each other inside the laser amplifier, they vibrate coherently with the same frequency and direction. In essence, the photons "clone" themselves, creating a perfect copy of the first photon. Coherence causes the light to shine in a beam that is ex ...
... 1023 photons to be precise. As the photons encounter each other inside the laser amplifier, they vibrate coherently with the same frequency and direction. In essence, the photons "clone" themselves, creating a perfect copy of the first photon. Coherence causes the light to shine in a beam that is ex ...
The Evolution of the Mass-Size relation to z = 3.5 in the GOODS
... have smaller half-light radii. Their “norm optical sizes are thus perhaps not strong galaxies between 10 < log(M ...
... have smaller half-light radii. Their “norm optical sizes are thus perhaps not strong galaxies between 10 < log(M ...
PDF only - at www.arxiv.org.
... Color has been invaluable in the study of stars using the Hertzsprung-‐Russell diagram, but despite this precedent there is a sparse literature discussing terrestrial exoplanet characterization using pho ...
... Color has been invaluable in the study of stars using the Hertzsprung-‐Russell diagram, but despite this precedent there is a sparse literature discussing terrestrial exoplanet characterization using pho ...
GOODS: Great Observatories Origins Deep Survey
... • No Hubble Sequence apparently observed at z>2. When and how did it form? • What kind of galaxies are LBGs – Bursting dwarfs? Massive? – What did they evolve into? How much stellar mass did they contribute? – Up to which redshift are there LBGs? When did SF on galactic scale start? ...
... • No Hubble Sequence apparently observed at z>2. When and how did it form? • What kind of galaxies are LBGs – Bursting dwarfs? Massive? – What did they evolve into? How much stellar mass did they contribute? – Up to which redshift are there LBGs? When did SF on galactic scale start? ...
targets - siamois
... What do we need after CoRoT, that Kepler, and hopefully PLATO, will not provide? Doppler velocity (Space-borne observations are photometric) ...
... What do we need after CoRoT, that Kepler, and hopefully PLATO, will not provide? Doppler velocity (Space-borne observations are photometric) ...
The Evolution of Molecular Clouds
... estimate for the solar neighborhood, where the timescales are somewhat longer than the Galactic average, yields a formation timescale for molecular clouds of about 50 Myr (Larson 1991a, 1992b). Note that this estimated formation time is not much longer than the cloud lifetime of ∼ 20 Myr (Section 2) ...
... estimate for the solar neighborhood, where the timescales are somewhat longer than the Galactic average, yields a formation timescale for molecular clouds of about 50 Myr (Larson 1991a, 1992b). Note that this estimated formation time is not much longer than the cloud lifetime of ∼ 20 Myr (Section 2) ...
The AG Carinae nebula: abundant evidence for a red supergiant
... nebular abundances should reflect the surface composition of the star at the time of the eruption. Garcia-Segura, Mac Low & Langer (1996a) have followed the dynamical interaction of a 60-M0 star with its environment as it evolves through the LBV phase to a WR star. They predict that the nebula forme ...
... nebular abundances should reflect the surface composition of the star at the time of the eruption. Garcia-Segura, Mac Low & Langer (1996a) have followed the dynamical interaction of a 60-M0 star with its environment as it evolves through the LBV phase to a WR star. They predict that the nebula forme ...
Photometric transit search for planets around cool stars from the
... the wide-field approach can only be carried out effectively utilizing 4-m class telescopes, and shifting to near-infrared observing wavelengths in order to be able to probe tens of thousands of M dwarfs which would be otherwise too faint in the visible, as it is done for example by the WFCAM/UKIRT T ...
... the wide-field approach can only be carried out effectively utilizing 4-m class telescopes, and shifting to near-infrared observing wavelengths in order to be able to probe tens of thousands of M dwarfs which would be otherwise too faint in the visible, as it is done for example by the WFCAM/UKIRT T ...
Dust in Protoplanetary Disks: Properties and Evolution
... grown to centimeter size by the time the central star becomes optically visible. However, one should remember that this technique is limited today by the sensitivity and resolution of existing millimeter interferometers. For example, studies of the radial dependence of the dust properties are still ...
... grown to centimeter size by the time the central star becomes optically visible. However, one should remember that this technique is limited today by the sensitivity and resolution of existing millimeter interferometers. For example, studies of the radial dependence of the dust properties are still ...
Chapter 6 in the LSST Science Book
... have begun bound to one another, and both may be on their first approach to the Milky Way, not already bound to it. Attempts to model the motion of the Clouds together with a formation model for the Magellanic Stream in light of the new data (e.g., Besla et al. 2009) are very much works in progress. ...
... have begun bound to one another, and both may be on their first approach to the Milky Way, not already bound to it. Attempts to model the motion of the Clouds together with a formation model for the Magellanic Stream in light of the new data (e.g., Besla et al. 2009) are very much works in progress. ...
18.1 Raman Scattering
... When light travels through a vacuum it cannot be seen unless it is impinging on the detector (eye). This is because the waves destructively interfere in all directions except the direction of travel. When light travels through a transparent material the electric vector polarizes the electron cloud. ...
... When light travels through a vacuum it cannot be seen unless it is impinging on the detector (eye). This is because the waves destructively interfere in all directions except the direction of travel. When light travels through a transparent material the electric vector polarizes the electron cloud. ...
Astronomy Astrophysics Rotational spectrum of C
... Herschel sub-mm facilities will provide large amounts of highprecision (Δν ≤ 1 MHz) spectroscopic data in the wavelength range down to 150 μm (corresponding to 2 THz in frequency). The international interferometer ALMA, in addition, will provide an unprecedented spatial resolution and a sensitivity ...
... Herschel sub-mm facilities will provide large amounts of highprecision (Δν ≤ 1 MHz) spectroscopic data in the wavelength range down to 150 μm (corresponding to 2 THz in frequency). The international interferometer ALMA, in addition, will provide an unprecedented spatial resolution and a sensitivity ...
A method for controlling the bandwidth of high-energy, few
... using multiple back-and-forth reflections inside multiple-path absorption cells. Finally, it is possible to tune the laser wavelength very fast over the whole spectral region to match the molecular absorption. In this way rapid relaxation or transient absorption processes can be investigated, using ...
... using multiple back-and-forth reflections inside multiple-path absorption cells. Finally, it is possible to tune the laser wavelength very fast over the whole spectral region to match the molecular absorption. In this way rapid relaxation or transient absorption processes can be investigated, using ...
The Cosmos & the Bible
... – Light from objects that look thousands of lightyears away must have made many circuits and taken thousands of years to do so. ...
... – Light from objects that look thousands of lightyears away must have made many circuits and taken thousands of years to do so. ...
Photoelectron spectroscopy of chromium
... out computational studies of the electronic structures of numerous transition metal atoms in Si12 hexagonal prism cages, finding the 18 electron rule to have only limited applicability in these systems. Along with fundamental interest in the stabilities of metal-doped silicon clusters, there are als ...
... out computational studies of the electronic structures of numerous transition metal atoms in Si12 hexagonal prism cages, finding the 18 electron rule to have only limited applicability in these systems. Along with fundamental interest in the stabilities of metal-doped silicon clusters, there are als ...
astro-ph/9808039 PDF
... given by Cardelli, Clayton & Mathis (1989) with the parameter RV set to 3.1; hereafter, the term Galactic in reference to extinction always means this curve. Hα/Hβ ratios are converted to reddenings using the formula E(B − V ) = −1.00 + 2.184 log(Hα/Hβ), which is computed from the Galactic curve. To ...
... given by Cardelli, Clayton & Mathis (1989) with the parameter RV set to 3.1; hereafter, the term Galactic in reference to extinction always means this curve. Hα/Hβ ratios are converted to reddenings using the formula E(B − V ) = −1.00 + 2.184 log(Hα/Hβ), which is computed from the Galactic curve. To ...
A Tale of Two Physics
... acceleration as it does now. This begat the non-mathematical [4.] inflation theory as the "solution" to a problem that should have been a warning that physics was on the wrong track when the WMAP showed too much homogeneity for the universe to only be 13.8 billion years old. Thus, begins another rou ...
... acceleration as it does now. This begat the non-mathematical [4.] inflation theory as the "solution" to a problem that should have been a warning that physics was on the wrong track when the WMAP showed too much homogeneity for the universe to only be 13.8 billion years old. Thus, begins another rou ...
Stellar Mass Loss in Globular - Jodrell Bank Centre for Astrophysics
... surrounded by circumstellar silicate dust. ω Cen V42 may also be surrounded by carbon-rich dust. Much of this work is devoted to finding the threshold for dust production and the mass-loss rates from cluster stars with both chromospherically- and dust- or pulsationdriven winds. Using very-high-resolu ...
... surrounded by circumstellar silicate dust. ω Cen V42 may also be surrounded by carbon-rich dust. Much of this work is devoted to finding the threshold for dust production and the mass-loss rates from cluster stars with both chromospherically- and dust- or pulsationdriven winds. Using very-high-resolu ...
The diameter of the CoRoT target HD 49933
... We use the state-of-the-art radiative hydrodynamical code (STAGGER CODE, Nordlund & Galsgaard2) to simulate the surface convection and stratification of HD 49933. In a local box, the code solves the full set of conservative hydrodynamical equations coupled to an accurate treatment of the radiative t ...
... We use the state-of-the-art radiative hydrodynamical code (STAGGER CODE, Nordlund & Galsgaard2) to simulate the surface convection and stratification of HD 49933. In a local box, the code solves the full set of conservative hydrodynamical equations coupled to an accurate treatment of the radiative 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.