Chapter 5
... Imaging Camera and Spectrograph) on the E-ELT (Kasper et al. 2010) will further increase the detections and help pushing the lower mass limit of our detections closer to Earth–like objects. Observations of our Solar System planets show that a common feature of almost all planets is inhomogeneity. Oc ...
... Imaging Camera and Spectrograph) on the E-ELT (Kasper et al. 2010) will further increase the detections and help pushing the lower mass limit of our detections closer to Earth–like objects. Observations of our Solar System planets show that a common feature of almost all planets is inhomogeneity. Oc ...
Chapter 37 - UBC Physics
... shifts of the light waves. Only the air between the plates produces a phase shift which varies along the horizontal direction. nglass > nair, therefore there is a π phase shift when light reflects from the bottom surface of the air cavity but no phase shift when light reflects from the top surface o ...
... shifts of the light waves. Only the air between the plates produces a phase shift which varies along the horizontal direction. nglass > nair, therefore there is a π phase shift when light reflects from the bottom surface of the air cavity but no phase shift when light reflects from the top surface o ...
First Measurement of the Atomic Electric Dipole
... only at higher orders [2], resulting in EDM values too small to be detected in the foreseeable future. On the other hand, extensions of the SM, such as supersymmetry, naturally provide additional sources of CP violation that explain the matter-antimatter asymmetry of the Universe and result in obser ...
... only at higher orders [2], resulting in EDM values too small to be detected in the foreseeable future. On the other hand, extensions of the SM, such as supersymmetry, naturally provide additional sources of CP violation that explain the matter-antimatter asymmetry of the Universe and result in obser ...
arXiv: 1106.2158
... first moments, increasing in scale by a factor of &1025 in a mere ∼10−33 second. This massive expansion left the universe nearly spatially-flat and remarkably homogeneous and isotropic on its largest scales. Quantum fluctuations in the “inflaton” field (or fields) that caused this expansion seeded t ...
... first moments, increasing in scale by a factor of &1025 in a mere ∼10−33 second. This massive expansion left the universe nearly spatially-flat and remarkably homogeneous and isotropic on its largest scales. Quantum fluctuations in the “inflaton” field (or fields) that caused this expansion seeded t ...
Waves
... • The color you see is the light wave that is being reflected. • White objects are reflecting all light waves • Black object are absorbing all light waves Primary light colors are Red, green and blue. ...
... • The color you see is the light wave that is being reflected. • White objects are reflecting all light waves • Black object are absorbing all light waves Primary light colors are Red, green and blue. ...
Chapter 1 (Lectures 1
... The plan of these chapters is to begin with a review of various aspects of the physics of an atom in a magnetic field, particularly the Zeeman effect, and to explore how such physics enables us to observe and study magnetic fields in stars. Then observations of stellar magnetism in the Sun and in up ...
... The plan of these chapters is to begin with a review of various aspects of the physics of an atom in a magnetic field, particularly the Zeeman effect, and to explore how such physics enables us to observe and study magnetic fields in stars. Then observations of stellar magnetism in the Sun and in up ...
Lecture 2, the physics of atoms in magnetic fields
... so a few lines may be in Pachen-Back limit at much smaller B than normal (e.g. Fe II 6147 and 6149 A). Paschen-Back splitting occurs in H and Li below 30 kG Above about 100 kG quadratic term becomes important. Quadratic Zeeman effect is observed in lines of H in WDs Above about 10 MG magnetic terms ...
... so a few lines may be in Pachen-Back limit at much smaller B than normal (e.g. Fe II 6147 and 6149 A). Paschen-Back splitting occurs in H and Li below 30 kG Above about 100 kG quadratic term becomes important. Quadratic Zeeman effect is observed in lines of H in WDs Above about 10 MG magnetic terms ...
Generalized laws of refraction that can lead to
... be resolved by an observer and at the same time large compared to the wavelength [8], this compromise can be as unnoticeable as a computer monitor’s pixelation; METATOYs then appear to refract light according to exotic generalized laws of refraction. The generalized laws of refraction that have been ...
... be resolved by an observer and at the same time large compared to the wavelength [8], this compromise can be as unnoticeable as a computer monitor’s pixelation; METATOYs then appear to refract light according to exotic generalized laws of refraction. The generalized laws of refraction that have been ...
Further VLBA Observations of SiO Masers toward Mira
... The compressed total intensity images for each epoch and transition with superposed polarization “E” vectors are shown in Figures 1 – 3. (Expanded views of these figures with and without polarization vectors are avaliable in electronic form.) The fitted ring diameters and width are shown in Table 2 ...
... The compressed total intensity images for each epoch and transition with superposed polarization “E” vectors are shown in Figures 1 – 3. (Expanded views of these figures with and without polarization vectors are avaliable in electronic form.) The fitted ring diameters and width are shown in Table 2 ...
Effect of Ionosphere on Radio Wave Propagation
... the radio wave The most common polarizations in use for microwave links are vertical and horizontal. A vertical half-wave dipole antenna will radiate with vertical polarization. The direction of the electric field does not necessarily remain the same as it travels forwards through space. It is possi ...
... the radio wave The most common polarizations in use for microwave links are vertical and horizontal. A vertical half-wave dipole antenna will radiate with vertical polarization. The direction of the electric field does not necessarily remain the same as it travels forwards through space. It is possi ...
egg nebula - IOPscience
... sweeping up the surrounding dense gas like a snowplow, creating hollow structures with thin dense walls. The linear extent of the polar spindles measured in both NICMOS and WFPC2 images indicates that this hydrodynamic interaction has been taking place for about 200 yr. The origin of the equatorial ...
... sweeping up the surrounding dense gas like a snowplow, creating hollow structures with thin dense walls. The linear extent of the polar spindles measured in both NICMOS and WFPC2 images indicates that this hydrodynamic interaction has been taking place for about 200 yr. The origin of the equatorial ...
–1– Order of Magnitude Astrophysics
... A particular useful way of looking at scattering, which leads to important order-of-magnitude estimates, is by means of random walks. It is possible to view the processes of absorption, emission, and propagation in probabilistic terms for a single photon rather than the average behavior of large num ...
... A particular useful way of looking at scattering, which leads to important order-of-magnitude estimates, is by means of random walks. It is possible to view the processes of absorption, emission, and propagation in probabilistic terms for a single photon rather than the average behavior of large num ...
Measurement of the earthshine polarization in the B, V, R, and I
... 30◦ and 110◦ with a new, specially designed wide field polarimeter. In the observations the light from the bright lunar crescent is blocked with focal plane masks. Because the entire Moon is imaged, the earthshine observations can be well corrected for the stray light from the bright lunar crescent ...
... 30◦ and 110◦ with a new, specially designed wide field polarimeter. In the observations the light from the bright lunar crescent is blocked with focal plane masks. Because the entire Moon is imaged, the earthshine observations can be well corrected for the stray light from the bright lunar crescent ...
Correcting Systematic Poalrization Effects in Keck LRISp
... these SNRs on faint targets with the 10m aperture of the Keck telescope, provided several instrumental artifacts can be suppressed. We describe here several methods to overcome instrumental error sources that are required to achieve these high SNRs on LRISp. We explore high SNR techniques such as de ...
... these SNRs on faint targets with the 10m aperture of the Keck telescope, provided several instrumental artifacts can be suppressed. We describe here several methods to overcome instrumental error sources that are required to achieve these high SNRs on LRISp. We explore high SNR techniques such as de ...
A Mach-Zehnder interferometer based on orbital angular momentum
... radial fast axis orientation operating in the mid infrared domain. When placed at the the focus of a telescope element provides a continuous helical phase ramp for an on axis sources, which creates the orbital angular momentum. Thanks to that phase, the intensity of the central source is canceled by ...
... radial fast axis orientation operating in the mid infrared domain. When placed at the the focus of a telescope element provides a continuous helical phase ramp for an on axis sources, which creates the orbital angular momentum. Thanks to that phase, the intensity of the central source is canceled by ...
status report on polarimetric high contrast results
... By rotating a half-wave plate (HWP2) far upstream in the optical path by 45◦, the sign of the incoming Stokes Q polarization is reversed. The instrumental aberrations, on the other hand, remain unchanged, resulting in the same background landscape as before. If the polarization images before and aft ...
... By rotating a half-wave plate (HWP2) far upstream in the optical path by 45◦, the sign of the incoming Stokes Q polarization is reversed. The instrumental aberrations, on the other hand, remain unchanged, resulting in the same background landscape as before. If the polarization images before and aft ...
the magnetic field properties of radio galaxies in different
... McKinney & Blandford (2009): powerful jet formed, through BZ mechanism, with initial dipolar magnetic field, and stable out to 103 Rg, bulk relativistic outflow up to Γ ~10, opening angle φ ~ 5o ...
... McKinney & Blandford (2009): powerful jet formed, through BZ mechanism, with initial dipolar magnetic field, and stable out to 103 Rg, bulk relativistic outflow up to Γ ~10, opening angle φ ~ 5o ...
Modelling magnetic fields in spiral galaxies
... at finite magnitude, but after considerable dispute it is becoming accepted that “catastrophic quenching” – in which the growth of large-scale fields is limited at very low strengths – does not inevitably occur. Outflows from the disc – galactic winds and fountains, for example – probably play an im ...
... at finite magnitude, but after considerable dispute it is becoming accepted that “catastrophic quenching” – in which the growth of large-scale fields is limited at very low strengths – does not inevitably occur. Outflows from the disc – galactic winds and fountains, for example – probably play an im ...
Multi-band Dual-Polarization Lens-coupled Planar
... is the average polarization rotation angle will be slightly different for each frequency band. This effect can be mitigated by doing a polarization calibration of the entire experiment for each frequency band. The second effect is depolarization, or signal loss, if there is significant polarization ...
... is the average polarization rotation angle will be slightly different for each frequency band. This effect can be mitigated by doing a polarization calibration of the entire experiment for each frequency band. The second effect is depolarization, or signal loss, if there is significant polarization ...
T Tauri stars Optical lucky imaging polarimetry of HL and XZ Tau
... The idea that stars are formed out of interstellar clouds have been present for several centuries. The initial idea, that the Sun and Planets formed out of a rotating cloud or disk of material was called the Nebular Hypothesis, which was formulated by Emanuel Swedenborg in 1734. It sprung from the r ...
... The idea that stars are formed out of interstellar clouds have been present for several centuries. The initial idea, that the Sun and Planets formed out of a rotating cloud or disk of material was called the Nebular Hypothesis, which was formulated by Emanuel Swedenborg in 1734. It sprung from the r ...
Variability of Be stars
... A disk can be produced by mass transfer in binary systems (Kriz & Harmanec 1975, BAICz, 26, 65), where the mass gainer spins-up to critical rotation. Can explain formation of 20-40 % of all Be stars (Pols et al. 1991, A&A, 241, 419) or even less (~5%, Van Bever & ...
... A disk can be produced by mass transfer in binary systems (Kriz & Harmanec 1975, BAICz, 26, 65), where the mass gainer spins-up to critical rotation. Can explain formation of 20-40 % of all Be stars (Pols et al. 1991, A&A, 241, 419) or even less (~5%, Van Bever & ...
here
... – where Sν is the flux density, κν is the mass absorption coefficient [e.g. Hildebrand 1983] – Fits typically invoke a spectral index for the opacity, and one or two temperature components, – can have significant optical depths at λ < 60µm and may have to consider non-thermal contributions from v ...
... – where Sν is the flux density, κν is the mass absorption coefficient [e.g. Hildebrand 1983] – Fits typically invoke a spectral index for the opacity, and one or two temperature components, – can have significant optical depths at λ < 60µm and may have to consider non-thermal contributions from v ...
Effect of the geomagnetic field on the intensity of sodium laser guide
... theoretically by a factor of more than 2 compared to non-polarized excitation of the ! = 2 hyperfine ground state1. The increase on the return light for circularly over linearly polarized light has been reported by Ge "#$ %&'2 to be 30%, Rabien "#$%&'3 find 30"50%. Denman "#$%&'4 measured a return f ...
... theoretically by a factor of more than 2 compared to non-polarized excitation of the ! = 2 hyperfine ground state1. The increase on the return light for circularly over linearly polarized light has been reported by Ge "#$ %&'2 to be 30%, Rabien "#$%&'3 find 30"50%. Denman "#$%&'4 measured a return f ...
Stellar Magnetic Field_1
... The pi-quadratic shift exceed the linear displacement of the sigmacomponents When H > 1010 n-4 ; for Balmer H10 this occurs if H > 106 gauss ...
... The pi-quadratic shift exceed the linear displacement of the sigmacomponents When H > 1010 n-4 ; for Balmer H10 this occurs if H > 106 gauss ...
Circular polarization
In electrodynamics, circular polarization of an electromagnetic wave is a polarization in which the electric field of the passing wave does not change strength but only changes direction in a rotary manner.In electrodynamics the strength and direction of an electric field is defined by what is called an electric field vector. In the case of a circularly polarized wave, as seen in the accompanying animation, the tip of the electric field vector, at a given point in space, describes a circle as time progresses. If the wave is frozen in time, the electric field vector of the wave describes a helix along the direction of propagation.Circular polarization is a limiting case of the more general condition of elliptical polarization. The other special case is the easier-to-understand linear polarization.The phenomenon of polarization arises as a consequence of the fact that light behaves as a two-dimensional transverse wave.