Photometric Variability and Rotation in Magnetic White Dwarfs
... emerged between the spin period and magnetic field strength and temperature, suggesting hotter MWDs spin faster and have higher field strengths, characteristics possibly associated with MWDs that might have formed in binary mergers. A similar investigation is carried out on longer timescales (months ...
... emerged between the spin period and magnetic field strength and temperature, suggesting hotter MWDs spin faster and have higher field strengths, characteristics possibly associated with MWDs that might have formed in binary mergers. A similar investigation is carried out on longer timescales (months ...
Planetary System Disruption by Galactic
... separation, or a∗ ), Figure 2a demonstrates that ∼30–60% of planetary systems in simulation set A experience instabilities causing one or more planetary ejections after 10 Gyrs (the approximate age of our galaxy’s thin disk). Even though binaries with smaller semimajor axes are less affected by gala ...
... separation, or a∗ ), Figure 2a demonstrates that ∼30–60% of planetary systems in simulation set A experience instabilities causing one or more planetary ejections after 10 Gyrs (the approximate age of our galaxy’s thin disk). Even though binaries with smaller semimajor axes are less affected by gala ...
Sisay M THESIS - Addis Ababa University Institutional Repository
... Those techniques that involve interference of wave fronts provide full-field refractive index data for the evaluation of concentration profiles. But the main limitation of the interferometric methods is their sensitivity to vibrations, and so they require precise optical conditions and limits their ...
... Those techniques that involve interference of wave fronts provide full-field refractive index data for the evaluation of concentration profiles. But the main limitation of the interferometric methods is their sensitivity to vibrations, and so they require precise optical conditions and limits their ...
Models for circumstellar nebulae around red and blue supergiants
... Classification and evolution Stars spend most of their life in the Main Sequence (MS). In this stage of their evolution the source of energy production is the fusion of hydrogen into helium in their core. This energy escapes from the star in the form of radiation and, to a minor fraction, in the for ...
... Classification and evolution Stars spend most of their life in the Main Sequence (MS). In this stage of their evolution the source of energy production is the fusion of hydrogen into helium in their core. This energy escapes from the star in the form of radiation and, to a minor fraction, in the for ...
Liquid-crystal photonic applications
... the molecules tend to align their long axes in a common direction (denoted by the director L), as shown in Fig. 2(a). However, no long-range positional order of the molecules with respect to each other is present. The chiral nematic phase is very similar as for achiral mesogens, but the asymmetry of ...
... the molecules tend to align their long axes in a common direction (denoted by the director L), as shown in Fig. 2(a). However, no long-range positional order of the molecules with respect to each other is present. The chiral nematic phase is very similar as for achiral mesogens, but the asymmetry of ...
Infrared Observations of Interstellar Ices Adwin Boogert NASA Herschel Science Center
... Far less ices than gas phase species detected because ices can only be detected by ...
... Far less ices than gas phase species detected because ices can only be detected by ...
PowerPoint
... Calibration Sources: Other Evolved Stars Other stellar sources have also been used for years as mm/submm primary calibration sources. These include one particularly interesting source: MWC 349. This is a star with (apparently) a stellar wind with nearly constant power law density falloff, resulting ...
... Calibration Sources: Other Evolved Stars Other stellar sources have also been used for years as mm/submm primary calibration sources. These include one particularly interesting source: MWC 349. This is a star with (apparently) a stellar wind with nearly constant power law density falloff, resulting ...
Slides - AO4ELT3
... High spatial resolution separates black hole region from host galaxy contamination TMT/MIRES will put JWST observations in context as done with Spitzer and today’s 8m telescopes ...
... High spatial resolution separates black hole region from host galaxy contamination TMT/MIRES will put JWST observations in context as done with Spitzer and today’s 8m telescopes ...
Sublimation temperature of circumstellar dust particles and its importance Hiroshi Kobayashi
... collisions and v is the collisional velocity. From the hydrodynamical simulations and laboratory experiments, Q ∗D ∝ m −0.2 to m 0 for small dust particles (Holsapple, 1993; Benz and Asphaug, 1999). Since p = −0.2 to 0 for a constant v with mass, b is estimated to be 1.8–1.9. This means that the sma ...
... collisions and v is the collisional velocity. From the hydrodynamical simulations and laboratory experiments, Q ∗D ∝ m −0.2 to m 0 for small dust particles (Holsapple, 1993; Benz and Asphaug, 1999). Since p = −0.2 to 0 for a constant v with mass, b is estimated to be 1.8–1.9. This means that the sma ...
LD Didactic (LEYBOLD) Scientific Teaching Manual
... energy levels of the isolated Nd atom split into a number Fig. 1.3: Absorption for three neighbouring transitions with of states. This gives rise to the ground state 4I9/2 from 5 sub-states different absorption strengths and the state 4F5/2, which can be pumped from 5 subs-tates. In principle an ato ...
... energy levels of the isolated Nd atom split into a number Fig. 1.3: Absorption for three neighbouring transitions with of states. This gives rise to the ground state 4I9/2 from 5 sub-states different absorption strengths and the state 4F5/2, which can be pumped from 5 subs-tates. In principle an ato ...
Cavity quantum electrodynamics with three
... and the laser thus immediately switches on [20]. Moreover, since 3D photonic bandgap crystals are typically semiconductor devices, the on-chip integration of such a thresholdless laser is readily foreseeable. Fourth, an important research theme in cQED is the breaking of the weak-coupling approximat ...
... and the laser thus immediately switches on [20]. Moreover, since 3D photonic bandgap crystals are typically semiconductor devices, the on-chip integration of such a thresholdless laser is readily foreseeable. Fourth, an important research theme in cQED is the breaking of the weak-coupling approximat ...
Stellar Wind Mechanisms and Instabilities
... ≈ 2.7 × 104 cm/s2 , this gives a pressure scale height of H ≈ 300 km, which is very much less than the solar radius R⊙ ≈ 700, 000 km. This implies a sharp edge to the visible solar photosphere, with the emergent spectrum well described by a planar atmospheric model fixed by just two parameters – typ ...
... ≈ 2.7 × 104 cm/s2 , this gives a pressure scale height of H ≈ 300 km, which is very much less than the solar radius R⊙ ≈ 700, 000 km. This implies a sharp edge to the visible solar photosphere, with the emergent spectrum well described by a planar atmospheric model fixed by just two parameters – typ ...
Introduction to super-resolution microscopy
... These localization-based super-resolution techniques were introduced by three different groups in 2006. These microscopes are termed photoactivation localization microscopy (PALM) [3], fluorescence photoactivation localization microscopy (FPALM) [4] and stochastic optical reconstruction microscopy (S ...
... These localization-based super-resolution techniques were introduced by three different groups in 2006. These microscopes are termed photoactivation localization microscopy (PALM) [3], fluorescence photoactivation localization microscopy (FPALM) [4] and stochastic optical reconstruction microscopy (S ...
Sample pages 1 PDF
... The so-called spectral colors are the purest producible colors. They are characterized by a wavelength width of less than 1 nm (i.e., with a laser). On the other hand, if the radiation contains nearly all wavelengths of the visible spectrum and of equal intensity, the resulting color impression is w ...
... The so-called spectral colors are the purest producible colors. They are characterized by a wavelength width of less than 1 nm (i.e., with a laser). On the other hand, if the radiation contains nearly all wavelengths of the visible spectrum and of equal intensity, the resulting color impression is w ...
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.