The Earth in Context - Washington State University
... The Nature of Our Solar System Eventually, astronomical study demonstrated that our Sun is a rather ordinary, medium-sized star. It looks like a sphere, instead of a point of light, because it is much closer to the Earth than are the stars. The Sun is “only” 150 million km (93 million miles) from t ...
... The Nature of Our Solar System Eventually, astronomical study demonstrated that our Sun is a rather ordinary, medium-sized star. It looks like a sphere, instead of a point of light, because it is much closer to the Earth than are the stars. The Sun is “only” 150 million km (93 million miles) from t ...
Coding Einstein`s Legacy - the Neukom Institute
... The most direct evidence of a black hole to this day is the observation of the center of the Milky Way. It was discovered in 1974 by the astronomers Bruce Balick (University of California, Santa Cruz) and Robert L. Brown (National Radio Astronomy Observatory) that there existed in the center of our ...
... The most direct evidence of a black hole to this day is the observation of the center of the Milky Way. It was discovered in 1974 by the astronomers Bruce Balick (University of California, Santa Cruz) and Robert L. Brown (National Radio Astronomy Observatory) that there existed in the center of our ...
Persistence of uranium emission in laser
... analytical applications, signal-to-noise (S/N) and signal-tobackground (S/B) ratios are important. In Fig. 3, the background-subtracted line intensity and signal to background ratio are plotted versus laser energy for the U I 356.18 nm line. The spectra were taken 2 mm from the target with 100 Torr ...
... analytical applications, signal-to-noise (S/N) and signal-tobackground (S/B) ratios are important. In Fig. 3, the background-subtracted line intensity and signal to background ratio are plotted versus laser energy for the U I 356.18 nm line. The spectra were taken 2 mm from the target with 100 Torr ...
Studying the Stars
... Now that we can be more accurate in our measurements, stars can have more specific magnitudes like 1.5, 6.73, etc. and even negative numbers for those stars that are brighter than 1st order. ...
... Now that we can be more accurate in our measurements, stars can have more specific magnitudes like 1.5, 6.73, etc. and even negative numbers for those stars that are brighter than 1st order. ...
BP4301373380
... postulation of the neutrino to conserve energy and momentum in beta decays, dark matter would be simply a book-keeping device - one can infer nothing about it other than its distribution and the fact that it acts gravitationally like regular matter. Still, the experimental fact remains that a majori ...
... postulation of the neutrino to conserve energy and momentum in beta decays, dark matter would be simply a book-keeping device - one can infer nothing about it other than its distribution and the fact that it acts gravitationally like regular matter. Still, the experimental fact remains that a majori ...
Pulsating Stars: Stars that Breathe
... temperature and brightness of Cepheid variables were caused by radial pulsation. He argued that binary theories of stellar pulsation should be discarded and that astronomers should seek a mechanism by which single stars could rhythmically ‘breathe’ in and out. Radial pulsations had been proposed by ...
... temperature and brightness of Cepheid variables were caused by radial pulsation. He argued that binary theories of stellar pulsation should be discarded and that astronomers should seek a mechanism by which single stars could rhythmically ‘breathe’ in and out. Radial pulsations had been proposed by ...
J. M. Greenberg, J. S. Gillette, G. Muñoz Caro, T. B. Mahajan, R. N.
... injection into the time-of-flight apparatus. Only molecules with multiple aromatic rings or an extended conjugation system are appreciably ionized owing to their low-ionization potentials and resonant absorbances at 266 nm (Clemett & Zare 1997). Although the mL2MS system is quite selective, the spec ...
... injection into the time-of-flight apparatus. Only molecules with multiple aromatic rings or an extended conjugation system are appreciably ionized owing to their low-ionization potentials and resonant absorbances at 266 nm (Clemett & Zare 1997). Although the mL2MS system is quite selective, the spec ...
Infrared Photometry of Red Supergiants in Young Clusters in the
... molecular opacity and input physics such as the presence of convective undershoot. αP is a free parameter with in each model hence its value is potentially a resting place for the effects of assumptions and uncertainties within the particular model. To investigate the model dependence of αP we show ...
... molecular opacity and input physics such as the presence of convective undershoot. αP is a free parameter with in each model hence its value is potentially a resting place for the effects of assumptions and uncertainties within the particular model. To investigate the model dependence of αP we show ...
X-ray and UV Transients
... >10 events y-1 even if the sensitivity is 102 less. • The observed signals have UV flux~host, so confusion with (even mildly) variable sources is an issue unless additional information is available • A combined UV survey+optical SN survey like PTF will be powerful to get retrospective measurements ...
... >10 events y-1 even if the sensitivity is 102 less. • The observed signals have UV flux~host, so confusion with (even mildly) variable sources is an issue unless additional information is available • A combined UV survey+optical SN survey like PTF will be powerful to get retrospective measurements ...
ppt
... • On the other hand, according to the postulate “1a”, photon must have its “field” part far ∞ so, according to the postulate “1b”, it must have an interaction with other PO in this “field”, this interaction can be only the gravitational. In other words, photon have the gravitational interaction as ...
... • On the other hand, according to the postulate “1a”, photon must have its “field” part far ∞ so, according to the postulate “1b”, it must have an interaction with other PO in this “field”, this interaction can be only the gravitational. In other words, photon have the gravitational interaction as ...
spatially resolved spitzer irs spectroscopy of the central region of m82
... features at 6.2, 7.7, 8.6, 11.3, 12.6, and 14.2 m, as well as the 16Y18 m complex are listed in Table 3. Their values were derived using PAHFIT (Smith et al. 2007b), an IDL tool that decomposes low-resolution spectra of PAH emission sources using a physically motivated model. This model includes s ...
... features at 6.2, 7.7, 8.6, 11.3, 12.6, and 14.2 m, as well as the 16Y18 m complex are listed in Table 3. Their values were derived using PAHFIT (Smith et al. 2007b), an IDL tool that decomposes low-resolution spectra of PAH emission sources using a physically motivated model. This model includes s ...
script
... On the contrary, the line shape of a CCC Auger transition is determined by the type of interaction of the two-hole state. We differentiate three principal cases:16 a. In the light elements, the Russel-Sounders coupling (Coulomb) dominates. b. For the heavy elements, mainly spin-orbit (jj) coupling i ...
... On the contrary, the line shape of a CCC Auger transition is determined by the type of interaction of the two-hole state. We differentiate three principal cases:16 a. In the light elements, the Russel-Sounders coupling (Coulomb) dominates. b. For the heavy elements, mainly spin-orbit (jj) coupling i ...
The Milky Way Laboratory
... Next Steps: The Skeleton of the Milky Way • Identify more Bones of the Milky Way. Combine with other tracers (e.g. CO, HI, dense gas) to develop a model of Galactic structure • Measure physical properties and kinematics of Bones – compare directly with simulations. Develop improved Galactic-scale s ...
... Next Steps: The Skeleton of the Milky Way • Identify more Bones of the Milky Way. Combine with other tracers (e.g. CO, HI, dense gas) to develop a model of Galactic structure • Measure physical properties and kinematics of Bones – compare directly with simulations. Develop improved Galactic-scale s ...
HST04-Cosmology - Indico
... the universe is accelerating! No ordinary form of (dark) matter can lead to accelerating expansion, so one needs to introduce another form of energy, called dark energy, which does not cluster, one example being a cosmological constant Cosmic Microwave Background anisotropies: Geometry of the univer ...
... the universe is accelerating! No ordinary form of (dark) matter can lead to accelerating expansion, so one needs to introduce another form of energy, called dark energy, which does not cluster, one example being a cosmological constant Cosmic Microwave Background anisotropies: Geometry of the univer ...
Environment and self-regulation in galaxy formation
... best visible through the well-known morphology-density relationship. It is less clear, though, whether the environment is equally important at a given galaxy morphology. In this paper we study the effect of environment on the evolution of early-type galaxies as imprinted in the fossil record by anal ...
... best visible through the well-known morphology-density relationship. It is less clear, though, whether the environment is equally important at a given galaxy morphology. In this paper we study the effect of environment on the evolution of early-type galaxies as imprinted in the fossil record by anal ...
New Scientist - Quark Nova Project
... confirmed, it proves that quarks can exist freely at high densities and low temperatures, rather than bound up in hadrons – the catchall name given to any particle made of quarks. Second, for the explosive quark nova model Ouyed’s team has shown that the density at which quarks get freed is intimate ...
... confirmed, it proves that quarks can exist freely at high densities and low temperatures, rather than bound up in hadrons – the catchall name given to any particle made of quarks. Second, for the explosive quark nova model Ouyed’s team has shown that the density at which quarks get freed is intimate ...
A New Model without Dark Matter for the Rotation of Spiral Galaxies
... in the gas, there is often measurable expansion with higher radial velocities occurring near the nucleus” and also they show that “radially progressive bursts of star format ion can account for a wide range of these observed phenomena and could be related to the presence of liners in the interstella ...
... in the gas, there is often measurable expansion with higher radial velocities occurring near the nucleus” and also they show that “radially progressive bursts of star format ion can account for a wide range of these observed phenomena and could be related to the presence of liners in the interstella ...
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.