Neutron stars as probes of extreme energy density matter
... predominantly thermal emission from the surface has been detected (see table 2). Recent reviews, from which the data below are extracted, can be found in, e.g., [17,20], and references therein. The observed flux (in all cases in X-rays, and when the star is near enough, in optical as well) can be ap ...
... predominantly thermal emission from the surface has been detected (see table 2). Recent reviews, from which the data below are extracted, can be found in, e.g., [17,20], and references therein. The observed flux (in all cases in X-rays, and when the star is near enough, in optical as well) can be ap ...
Experiment VI Polarized Light
... the first polarizer, then its field strength is E cosθ after passing through the second polarizer. ...
... the first polarizer, then its field strength is E cosθ after passing through the second polarizer. ...
Circum-stellar medium around rotating massive stars at solar
... the self-similar evolution phase of the bubble is well recovered, demonstrating the suitability of the chosen approach for the astrophysical problem under consideration (see Fig. 13 and the discussion in Sect. 4.6). The second new tool is an elaborate, object-oriented implementation of the descripti ...
... the self-similar evolution phase of the bubble is well recovered, demonstrating the suitability of the chosen approach for the astrophysical problem under consideration (see Fig. 13 and the discussion in Sect. 4.6). The second new tool is an elaborate, object-oriented implementation of the descripti ...
Nanocrystalline silicon prepared at high growth rate using helium
... By extrapolating the straight portion of the Tauc’s plot to α = 0 at the onset of optical absorption (as shown by the inset of figure 1), the optical gap (Eg) of the samples was estimated and that shows its gradual widening, as presented in table 1. Systematic reduction in α and simultaneous widenin ...
... By extrapolating the straight portion of the Tauc’s plot to α = 0 at the onset of optical absorption (as shown by the inset of figure 1), the optical gap (Eg) of the samples was estimated and that shows its gradual widening, as presented in table 1. Systematic reduction in α and simultaneous widenin ...
The spin and orbit of the newly discovered pulsar IGR J17480-2446
... a velocity of 85 ± 10 km s−1 (Ferraro et al. 2009), the measured value of the spin frequency is affected by a systematic offset of ∼ +3 × 10−3 Hz, though this is unimportant when making conclusions about the source properties. In order to extend the range of fluxes at which the source was observed and ...
... a velocity of 85 ± 10 km s−1 (Ferraro et al. 2009), the measured value of the spin frequency is affected by a systematic offset of ∼ +3 × 10−3 Hz, though this is unimportant when making conclusions about the source properties. In order to extend the range of fluxes at which the source was observed and ...
Mid-infrared imaging of the dust shell around the post
... spatial resolution allows us to image the thermal emission from the warm dust and to resolve the structure of the inner envelope. The observations are modelled using an axisymmetric radiation transport (RT) code to determine the detailed density distribution of dust within the CSE. 2 O B S E RVAT I ...
... spatial resolution allows us to image the thermal emission from the warm dust and to resolve the structure of the inner envelope. The observations are modelled using an axisymmetric radiation transport (RT) code to determine the detailed density distribution of dust within the CSE. 2 O B S E RVAT I ...
Near-Infrared Spectroscopy
... to differentiate between light attenuation caused by skull and overlying tissues and light attenuation caused by cerebral tissue. This is called the multi-distance approach and is used in several types of spectrometer, such as spatially resolved spectroscopy and functional NIRS. In most of the NIRS ...
... to differentiate between light attenuation caused by skull and overlying tissues and light attenuation caused by cerebral tissue. This is called the multi-distance approach and is used in several types of spectrometer, such as spatially resolved spectroscopy and functional NIRS. In most of the NIRS ...
The Intensity of Ligand Absorption - TopSCHOLAR
... I would like to express gratitude to my research advisor, Dr. Earl F. Pearson, who has given freely of his time and knowledge to show me the way to scientific research. His critical advice and encouragement are especially appreciated. In addition, I wish to thank the members of the Department of Che ...
... I would like to express gratitude to my research advisor, Dr. Earl F. Pearson, who has given freely of his time and knowledge to show me the way to scientific research. His critical advice and encouragement are especially appreciated. In addition, I wish to thank the members of the Department of Che ...
Extrasolar planets - Astronomisk Ungdom
... All work around extra solar planets is fairly new and current. At present time the transit method is moderate for detecting planets of smaller sizes which are normally difficult to identify due to the strongly ablaze host stars. Furthermore, this system does not only uncover planets around other sta ...
... All work around extra solar planets is fairly new and current. At present time the transit method is moderate for detecting planets of smaller sizes which are normally difficult to identify due to the strongly ablaze host stars. Furthermore, this system does not only uncover planets around other sta ...
Rapid Rotation of Low-Mass Red Giants Using APOKASC: A
... the cross-correlation peak between the observed spectrum and its template to the width of the cross-correlation peak between the template and an artificially rotationally broadened version of the template, a rotational broadening is determined (see White & Hillenbrand 2004, with additions by Will Fi ...
... the cross-correlation peak between the observed spectrum and its template to the width of the cross-correlation peak between the template and an artificially rotationally broadened version of the template, a rotational broadening is determined (see White & Hillenbrand 2004, with additions by Will Fi ...
Extrasolar Planets: An Amateur`s Search
... system, is described in quantitative terms due to the binary nature of that data. Three sets of distributions are presented for each of the four factors being analyzed in this way. The first set of distributions show the respective factor distributions for all 226 stars known to play host to extraso ...
... system, is described in quantitative terms due to the binary nature of that data. Three sets of distributions are presented for each of the four factors being analyzed in this way. The first set of distributions show the respective factor distributions for all 226 stars known to play host to extraso ...
Astrophysical Journal - Harvard-Smithsonian Center for Astrophysics
... timescales of stars from their brightness or velocity variations, is a powerful means of probing stellar interiors. Asteroseismic measurements derived from photometry require a long observational baseline at high cadence (to detect typically mHz frequencies) and photometric precision at the level of ...
... timescales of stars from their brightness or velocity variations, is a powerful means of probing stellar interiors. Asteroseismic measurements derived from photometry require a long observational baseline at high cadence (to detect typically mHz frequencies) and photometric precision at the level of ...
440400 - IDEALS @ Illinois
... In phenol-benzene complexes, the spectral shifts of phenolic ∆νOH increase with successive ring fluorine substitution, and the sequence follows aqueous phase acidity of the fluorophenols. This behavior is similar to what has been observed in the case of phenol-water complexes. The major contribu ...
... In phenol-benzene complexes, the spectral shifts of phenolic ∆νOH increase with successive ring fluorine substitution, and the sequence follows aqueous phase acidity of the fluorophenols. This behavior is similar to what has been observed in the case of phenol-water complexes. The major contribu ...
suggested
... light by the interposition of obscure bodies, or aggregations of bodies, invisibly thronging space’’. It was not until the work of Trumpler in 1930 [2] that the first evidence for interstellar reddening was found; which would imply that many stars were cooler than predicted. This reddening has nothin ...
... light by the interposition of obscure bodies, or aggregations of bodies, invisibly thronging space’’. It was not until the work of Trumpler in 1930 [2] that the first evidence for interstellar reddening was found; which would imply that many stars were cooler than predicted. This reddening has nothin ...
Monte Carlo simulations of X-ray absorption in the interstellar medium
... binary system Scorpius X-1. Still a long time after this discovery, the physical process leading to the observed luminosities was mysterious. Several years later, the idea that the radiation originates from mass accretion onto a compact object, for example, a neutron star or a black hole, became gen ...
... binary system Scorpius X-1. Still a long time after this discovery, the physical process leading to the observed luminosities was mysterious. Several years later, the idea that the radiation originates from mass accretion onto a compact object, for example, a neutron star or a black hole, became gen ...
MASSIVE GALAXIES IN COSMOLOGICAL SIMULATIONS: ULTRAVIOLET-SELECTED
... ticles. This grouping method consists of two discrete steps: in the first step, the code computes the overdensity at the location of each particle, and in the second step, it then merges density peaks based on a set of overdensity threshold parameters specified by the user. There are three threshold ...
... ticles. This grouping method consists of two discrete steps: in the first step, the code computes the overdensity at the location of each particle, and in the second step, it then merges density peaks based on a set of overdensity threshold parameters specified by the user. There are three threshold ...
Paper
... and this has led to the optical laser and the atom laser, respectively. Recently, Bose-Einstein condensates illuminated by an off-resonant laser beam (“dressed condensates”) were used to realize phase-coherent amplification of matter waves [1,2]. The amplification process involved the scattering of ...
... and this has led to the optical laser and the atom laser, respectively. Recently, Bose-Einstein condensates illuminated by an off-resonant laser beam (“dressed condensates”) were used to realize phase-coherent amplification of matter waves [1,2]. The amplification process involved the scattering of ...
The Story of the Peppered Moth
... Revolution moths are an excellent example of this. Until the last quarter of the 20th century, tree trunks grew darker in color with the pollution of Industrial Revolution. Therefore, the light-colored moths alighting on these trees became more visible to predators, and since they were more easily c ...
... Revolution moths are an excellent example of this. Until the last quarter of the 20th century, tree trunks grew darker in color with the pollution of Industrial Revolution. Therefore, the light-colored moths alighting on these trees became more visible to predators, and since they were more easily c ...
Title
... An accretion disk is formed around the hot star. In some cases magnetic fields of 103-104 Tesla are found in these systems, which then disrupt the disk ...
... An accretion disk is formed around the hot star. In some cases magnetic fields of 103-104 Tesla are found in these systems, which then disrupt the disk ...
Dark baryonic matter
... Dark matter at different scales • Observations at different scales : more matter in the universe than what is measured as electromagnetic radiation (visible light, radio, IR, X-rays, γ-rays) • Visible matter = stars, interstellar gas, dust : light & atomic spectra (mainly H) • Velocities of galaxie ...
... Dark matter at different scales • Observations at different scales : more matter in the universe than what is measured as electromagnetic radiation (visible light, radio, IR, X-rays, γ-rays) • Visible matter = stars, interstellar gas, dust : light & atomic spectra (mainly H) • Velocities of galaxie ...
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.