Astronomy 201 Cosmology
... • White holes - a phenomenon analogous to a black hole from which light can only escape. No obvious way to make or power one • Wormholes - conduits between two points in spacetime. Unstable, difficult to avoid singularity without going faster than c, solutions with timelike paths only size of elemen ...
... • White holes - a phenomenon analogous to a black hole from which light can only escape. No obvious way to make or power one • Wormholes - conduits between two points in spacetime. Unstable, difficult to avoid singularity without going faster than c, solutions with timelike paths only size of elemen ...
Full text - UvA/FNWI - University of Amsterdam
... sources in our sample in lighter colors as a reference. All components exceed a 3σ confidence level except for the 2.0σ detection in a selection of observations (from region Ei in the color-color diagram) of a Lorentzian with ν = 65 Hz that follows the same relation with νu as Lh . The simultaneousl ...
... sources in our sample in lighter colors as a reference. All components exceed a 3σ confidence level except for the 2.0σ detection in a selection of observations (from region Ei in the color-color diagram) of a Lorentzian with ν = 65 Hz that follows the same relation with νu as Lh . The simultaneousl ...
Polarization of Light: from Basics to Instruments
... • Achromatic retarders: made of 2 different materials with opposite variations of index of refraction as a function of wavelength ...
... • Achromatic retarders: made of 2 different materials with opposite variations of index of refraction as a function of wavelength ...
Light Pollution and Astronomy
... fascination for thousands of people in the UK. Many witnesses spoke of awe–inspiring observations in their childhood sparking off a lifetime of scientific study, with travels around the country or world in search of clearer skies, or the simple pleasure of studying the stars with a telescope from th ...
... fascination for thousands of people in the UK. Many witnesses spoke of awe–inspiring observations in their childhood sparking off a lifetime of scientific study, with travels around the country or world in search of clearer skies, or the simple pleasure of studying the stars with a telescope from th ...
Influence of Hydrogen Atoms on the Growth of carbon based
... physical properties similar to diamond and therefore they got the name diamondlike carbon films (DLC). Few years later, in 1976, Holland and Ojha [2] used an RF plasma enhanced chemical vapour deposition technique (PECVD) to produce films containing some amount of hydrogen. These films also showed v ...
... physical properties similar to diamond and therefore they got the name diamondlike carbon films (DLC). Few years later, in 1976, Holland and Ojha [2] used an RF plasma enhanced chemical vapour deposition technique (PECVD) to produce films containing some amount of hydrogen. These films also showed v ...
The Inner Coma and Nucleus of Comet Hale–Bopp
... fairly symmetric valley in the lightcurve of about one minute in length, shorter than the time scale for the effects of passing clouds, but longer than the time scale for a drop and rise in flux due to the position of the target in the aperture. Cases (b) and (c) above were caused by the telescope n ...
... fairly symmetric valley in the lightcurve of about one minute in length, shorter than the time scale for the effects of passing clouds, but longer than the time scale for a drop and rise in flux due to the position of the target in the aperture. Cases (b) and (c) above were caused by the telescope n ...
Book Describing Techniques to Detect Transiting ExoPlanets
... that a transiting exoplanet has been identified. Armed with this information the professionals are justified in requesting observing time on a large telescope to measure radial velocity on several dates, and thereby determine the mass of the secondary. If the mass is small it must be an exoplanet. A ...
... that a transiting exoplanet has been identified. Armed with this information the professionals are justified in requesting observing time on a large telescope to measure radial velocity on several dates, and thereby determine the mass of the secondary. If the mass is small it must be an exoplanet. A ...
An Improved Distance and Mass Estimate for Sgr A* from a Multistar
... before applying speckle holography as was done in the original SAA analysis. This is the first complete application of speckle holography to the Galactic Center speckle imaging data set from Keck Observatory. After the final speckle holography images are constructed for each observation epoch, an in ...
... before applying speckle holography as was done in the original SAA analysis. This is the first complete application of speckle holography to the Galactic Center speckle imaging data set from Keck Observatory. After the final speckle holography images are constructed for each observation epoch, an in ...
Mercury`s sodium exosphere - OpenBU
... In this dissertation, I examine the properties and origins of the most energetic component of Mercury’s atmosphere and how it couples to the planet’s magnetosphere and space environment. Mercury’s atmosphere consists of particles liberated from its surface that follow ballistic, collisionless trajec ...
... In this dissertation, I examine the properties and origins of the most energetic component of Mercury’s atmosphere and how it couples to the planet’s magnetosphere and space environment. Mercury’s atmosphere consists of particles liberated from its surface that follow ballistic, collisionless trajec ...
J. Am. Chem. SOC. 1993,115, 7685-7695
... 6 2.99 ( J = 188 Hz) and a CsHs IH resonance shifted 0.4 ppm upfield of the C-H insertion product. These features parallel the NMR data for the q2-1,4-C6H4(CF3)2complex described above. On this basis we assign the minor product as (CsHs)Rh(PMe3)[4,5-s2-1,3-C6H4(CF3)~] (eq 5). This molecule should ha ...
... 6 2.99 ( J = 188 Hz) and a CsHs IH resonance shifted 0.4 ppm upfield of the C-H insertion product. These features parallel the NMR data for the q2-1,4-C6H4(CF3)2complex described above. On this basis we assign the minor product as (CsHs)Rh(PMe3)[4,5-s2-1,3-C6H4(CF3)~] (eq 5). This molecule should ha ...
Higher Physics Resources Guide - Glow Blogs
... contains hyperlinks to resources which are relevant to the mandatory course key areas. Please note: Practitioners are not required to use the resources listed – they are only included as helpful suggestions. Practitioners should also refer to the SQA website for the most up to date Course and Unit S ...
... contains hyperlinks to resources which are relevant to the mandatory course key areas. Please note: Practitioners are not required to use the resources listed – they are only included as helpful suggestions. Practitioners should also refer to the SQA website for the most up to date Course and Unit S ...
The COMPLETE Survey of Outflows in Perseus
... cloud may be inappropriate. However, accurate distance estimates require maser parallaxes with high accuracy (e.g., Hirota et al. 2008), which do not yet exist for the entire cloud. To simplify our calculations, we adopt a single fiducial distance of 250±50 pc, similar to other recent cloud-wide stu ...
... cloud may be inappropriate. However, accurate distance estimates require maser parallaxes with high accuracy (e.g., Hirota et al. 2008), which do not yet exist for the entire cloud. To simplify our calculations, we adopt a single fiducial distance of 250±50 pc, similar to other recent cloud-wide stu ...
Care of the Dynamics System carts
... The free running nature of the carts mean that steep angles are not required for good results. If the angle of the track becomes too steep, the carts will gather a lot of speed on their journey and any simple stop mechanism may cause the cart to leave the track and fall, with force, onto the table o ...
... The free running nature of the carts mean that steep angles are not required for good results. If the angle of the track becomes too steep, the carts will gather a lot of speed on their journey and any simple stop mechanism may cause the cart to leave the track and fall, with force, onto the table o ...
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... focused on the entrance slit of a single pass monochromator. The light was detected with a PMT. The monochromator slits were set to 0.25 mm to give a spectral resolution of 0.5 nm. The sample was cooled by liquid nitrogen in a dewar. As a result of the limited sensitivity of our detection system for ...
... focused on the entrance slit of a single pass monochromator. The light was detected with a PMT. The monochromator slits were set to 0.25 mm to give a spectral resolution of 0.5 nm. The sample was cooled by liquid nitrogen in a dewar. As a result of the limited sensitivity of our detection system for ...
Document
... class of variables because it was: – Among one of the brightest members of the new class – The best studied of the sample – Showed a good range of the absorption/emission features used to characterize the set of stars ...
... class of variables because it was: – Among one of the brightest members of the new class – The best studied of the sample – Showed a good range of the absorption/emission features used to characterize the set of stars ...
Fibre-Loop Ring-Down Spectroscopy Using Liquid Core Waveguides
... of the light intensity in the cavity is measured, thereby rendering the techniques insensitive to light intensity fluctuations. Optical waveguides are used to build the optical cavities presented in this work. The geometries of such waveguides permit the use of very small liquid sample volumes while ...
... of the light intensity in the cavity is measured, thereby rendering the techniques insensitive to light intensity fluctuations. Optical waveguides are used to build the optical cavities presented in this work. The geometries of such waveguides permit the use of very small liquid sample volumes while ...
Polarization properties of coherent VUV light at 125
... radiation will produce spin-polarized electrons from single crystal and gases [10, 11, 12]. It was also recently demonstrated that photoelectron spectro-microscopy is a powerful method to study the electronic structure and dynamical properties of molecules adsorbed on surfaces [13]. During the last ...
... radiation will produce spin-polarized electrons from single crystal and gases [10, 11, 12]. It was also recently demonstrated that photoelectron spectro-microscopy is a powerful method to study the electronic structure and dynamical properties of molecules adsorbed on surfaces [13]. During the last ...
Reflectance Spectral Characteristics of Lunar Surface Materials
... as well as gravity waves, sound waves and magnetic currents. The intensity of the energy flux of electromagnetic waves is far greater than that of any other forms, which can therefore be neglected, and solar radiation is usually regarded simply as solar electromagnetic wave radiation. The wavelength ...
... as well as gravity waves, sound waves and magnetic currents. The intensity of the energy flux of electromagnetic waves is far greater than that of any other forms, which can therefore be neglected, and solar radiation is usually regarded simply as solar electromagnetic wave radiation. The wavelength ...
here
... illuminated, 30.26 a.u., Aquarius), and Pluto on May 16th (magnitude +14.2, 0.1", 100% illuminated, 32.72 a.u., Sagittarius). In the evening, Mars is in the northeast and Jupiter in the southeast. Jupiter is located in the southwest and Saturn in the southeast at midnight. Mercury and Venus can be ...
... illuminated, 30.26 a.u., Aquarius), and Pluto on May 16th (magnitude +14.2, 0.1", 100% illuminated, 32.72 a.u., Sagittarius). In the evening, Mars is in the northeast and Jupiter in the southeast. Jupiter is located in the southwest and Saturn in the southeast at midnight. Mercury and Venus can be ...
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.