UvA-DARE (Digital Academic Repository)
... massive enough, they continue to grow further by pulling in gas from the surrounding disk, forming giant planets in what is known as the core-accretion scenario (Pollack et al. 1996). This whole process spans around 40 orders of magnitude in mass or 13 orders of magnitude in radius (Figure 1.5), and ...
... massive enough, they continue to grow further by pulling in gas from the surrounding disk, forming giant planets in what is known as the core-accretion scenario (Pollack et al. 1996). This whole process spans around 40 orders of magnitude in mass or 13 orders of magnitude in radius (Figure 1.5), and ...
Non-thermal laser-induced desorption of metal atoms with bimodal
... a substrate for small Na particles. Being mounted to a manipulator, it could be cooled to 80 K and heated to about 750 K for cleaning. A thermal atomic beam of Na atoms with well-defined constant flux was generated and directed onto the substrate in order to deposit a predetermined coverage of atoms ...
... a substrate for small Na particles. Being mounted to a manipulator, it could be cooled to 80 K and heated to about 750 K for cleaning. A thermal atomic beam of Na atoms with well-defined constant flux was generated and directed onto the substrate in order to deposit a predetermined coverage of atoms ...
Laser Collimation of a Chromium Beam Using Doppler Force Wen
... beam was then collimated by one-dimensional optical molasses located 20 mm downstream from the square aperture. For chromium atoms, the 7 S3 → 7 P40 dipole transition was used for cooling at a wavelength of λ = 425.55 nm (in vacuum), with a line-width of Γ = 5 MHz and saturation intensity I0 = 85 W/ ...
... beam was then collimated by one-dimensional optical molasses located 20 mm downstream from the square aperture. For chromium atoms, the 7 S3 → 7 P40 dipole transition was used for cooling at a wavelength of λ = 425.55 nm (in vacuum), with a line-width of Γ = 5 MHz and saturation intensity I0 = 85 W/ ...
Carbon-enhanced metal-poor stars: a window on AGB
... we analyse a sample of 15 CEMP binary stars with known orbital periods: through the comparison with the observed abundances while matching the measured periods we put new constraints on our models of binary stellar evolution and AGB nucleosynthesis. In most of the systems a combination of large mass ...
... we analyse a sample of 15 CEMP binary stars with known orbital periods: through the comparison with the observed abundances while matching the measured periods we put new constraints on our models of binary stellar evolution and AGB nucleosynthesis. In most of the systems a combination of large mass ...
Quantifying substructure in galaxy clusters
... Mulchaey (1998) for 6 poor groups, and by Solanes, SalvadorSolé & González-Casado (1998) for 67 rich clusters from the ENACS survey. These different analyses agreed in (30 − 40)% of clusters which showed statistically significant substructure. But it appears that this amount depends on the analysi ...
... Mulchaey (1998) for 6 poor groups, and by Solanes, SalvadorSolé & González-Casado (1998) for 67 rich clusters from the ENACS survey. These different analyses agreed in (30 − 40)% of clusters which showed statistically significant substructure. But it appears that this amount depends on the analysi ...
Transcendental syntax I: deterministic case
... ∆, A ` B, deduce Γ, ∆ ` B. But are we that sure those two A are the same? The fact that we can both create and use word is at the very heart of syntheticity, i.e., meaning. The balance between the creation of words and their use is the main presupposition of logic, and thus the heart of transcendent ...
... ∆, A ` B, deduce Γ, ∆ ` B. But are we that sure those two A are the same? The fact that we can both create and use word is at the very heart of syntheticity, i.e., meaning. The balance between the creation of words and their use is the main presupposition of logic, and thus the heart of transcendent ...
Stellar evolution models for Z = 0.0001 to 0.03
... isochrones for arbitrary age and metallicity from the models, and the performance of these isochrones for several intermediate-age and old open clusters. All original models are available in electronic form and we describe the means by which they may be obtained. Key words: convection – stars: evolu ...
... isochrones for arbitrary age and metallicity from the models, and the performance of these isochrones for several intermediate-age and old open clusters. All original models are available in electronic form and we describe the means by which they may be obtained. Key words: convection – stars: evolu ...
Technological Education Institute (TEI) of Piraeus
... - Such changes can be caused either externally through induced microbend loss or through measurand induced changes in cladding loss - Mechanical changes can be induced through modifications to the local chemical ...
... - Such changes can be caused either externally through induced microbend loss or through measurand induced changes in cladding loss - Mechanical changes can be induced through modifications to the local chemical ...
Twenty-one new light curves of OGLE-TR-56b: New Please share
... curves using aperture photometry. Most of the photometry was done using the IRAF routine phot, part of the apphot package. A wide range of apertures and different comparison stars were examined, depending on the nightly conditions (e.g., seeing) and specific field of view, in the same way as describ ...
... curves using aperture photometry. Most of the photometry was done using the IRAF routine phot, part of the apphot package. A wide range of apertures and different comparison stars were examined, depending on the nightly conditions (e.g., seeing) and specific field of view, in the same way as describ ...
optical fibre communication
... Light changes its speed when it travels from one material to another, such as from air into glass. This cause an effect called refraction. Hence bending of the light at the surface of a material is expected. The speed of the light in the vacuum is highest. ...
... Light changes its speed when it travels from one material to another, such as from air into glass. This cause an effect called refraction. Hence bending of the light at the surface of a material is expected. The speed of the light in the vacuum is highest. ...
Article PDF - IOPscience
... Turbulence associated with the viscous evolution of gas disks can also redistribute metals (Clarke 1989; Sommer-Larsen & Yoshii 1989, 1990; Tsujimoto et al. 1995; Thon & Meusinger 1998). Beyond these gas-dynamical processes, radial migration of stars can alter stellar metallicity distributions indep ...
... Turbulence associated with the viscous evolution of gas disks can also redistribute metals (Clarke 1989; Sommer-Larsen & Yoshii 1989, 1990; Tsujimoto et al. 1995; Thon & Meusinger 1998). Beyond these gas-dynamical processes, radial migration of stars can alter stellar metallicity distributions indep ...
Lab Handout
... • Watch your tick marks. The spreadsheet automatically selects the spacing, which may not be appropriate for your graph (see General Considerations). • Be careful with the use of color to distinguish different data sets on the same graph. Yellow and light blue do not show up very well when printed e ...
... • Watch your tick marks. The spreadsheet automatically selects the spacing, which may not be appropriate for your graph (see General Considerations). • Be careful with the use of color to distinguish different data sets on the same graph. Yellow and light blue do not show up very well when printed e ...
Microscopy Tutorial - Fred Hutch Shared Resources
... series of sinusoidal ripples. Similarly, a beam of light passing through a small pinhole is not projected as a discrete point, but rather as a larger disc surrounded by concentric rings of decreasing intensity (Airy pattern). These rings are generated by interference of the different diffracted rays ...
... series of sinusoidal ripples. Similarly, a beam of light passing through a small pinhole is not projected as a discrete point, but rather as a larger disc surrounded by concentric rings of decreasing intensity (Airy pattern). These rings are generated by interference of the different diffracted rays ...
Polarization quantum beat spectroscopy of HCF„A˜1A …. II. Renner
... of the region of the K a ⫽1←0 subband of 2 40 , together with a simulated spectrum generated from the rotational constants determined by fitting unperturbed lines in the K a ⫽0←1 and 2←1 subbands.33 Two K a ⫽1←0 subbands are clearly observed, a situation similar to that found for 2 10 , where the pe ...
... of the region of the K a ⫽1←0 subband of 2 40 , together with a simulated spectrum generated from the rotational constants determined by fitting unperturbed lines in the K a ⫽0←1 and 2←1 subbands.33 Two K a ⫽1←0 subbands are clearly observed, a situation similar to that found for 2 10 , where the pe ...
The physics of neutron stars
... for recording gravitational waves from merging neutron stars [36, 37]. While gravitational waves have not yet been detected by ground-based antennas, they have already been registered in observations of “space antennas” – double neutron stars. Two stars orbiting a common center of masses are known t ...
... for recording gravitational waves from merging neutron stars [36, 37]. While gravitational waves have not yet been detected by ground-based antennas, they have already been registered in observations of “space antennas” – double neutron stars. Two stars orbiting a common center of masses are known t ...
System for measuring the angular response of radiometers
... The optics of this system was simulated in the ZEMAX program to estimate errors due to alignments in positioning of the radiometers. It was considered in this simulation an ideal radiometer and errors up to 5% in the measurements at large angles were verified for misalignments of 1o. Figure 3 resume ...
... The optics of this system was simulated in the ZEMAX program to estimate errors due to alignments in positioning of the radiometers. It was considered in this simulation an ideal radiometer and errors up to 5% in the measurements at large angles were verified for misalignments of 1o. Figure 3 resume ...
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.