Document
... (sun: 1033 erg/sec; supernova: 1051 ergs on a month time scale) • GRBs have been observed up to z ~ 6.3 -> hope to use GRB as cosmological tool (similar as Type Ia supernovae) SASS ...
... (sun: 1033 erg/sec; supernova: 1051 ergs on a month time scale) • GRBs have been observed up to z ~ 6.3 -> hope to use GRB as cosmological tool (similar as Type Ia supernovae) SASS ...
The redshift of extragalactic nebulae
... Since at the time of Stromberg's investigation there was still no known reliable estimate of the distances of the nebulae, K. LUNDMARK tried to bring the observed large velocities into context with the "compactness" of photographic images of nebulae. This later proved to be an attempt in the right d ...
... Since at the time of Stromberg's investigation there was still no known reliable estimate of the distances of the nebulae, K. LUNDMARK tried to bring the observed large velocities into context with the "compactness" of photographic images of nebulae. This later proved to be an attempt in the right d ...
Extragalactic Distances from Planetary Nebulae
... The density of PN within a galaxy should follow that of the galaxy’s light. Intracluster PN should not; they should scale with the area surveyed. “Overluminous” (foreground) objects should therefore be (primarily) found in the outskirts of galaxies. ...
... The density of PN within a galaxy should follow that of the galaxy’s light. Intracluster PN should not; they should scale with the area surveyed. “Overluminous” (foreground) objects should therefore be (primarily) found in the outskirts of galaxies. ...
The Extragalactic Group of MPE and USM
... • at all z, L>L* galaxies contribute ~1/3 to total SFR, but less to SSFR • at all z, massive galaxies are older than low mass galaxies • high mass galaxies form their stars earlier and faster ...
... • at all z, L>L* galaxies contribute ~1/3 to total SFR, but less to SSFR • at all z, massive galaxies are older than low mass galaxies • high mass galaxies form their stars earlier and faster ...
The Swift satellite lives up to its name, revealing cosmic
... panying supernova component (expected for nearby long GRBs) found nothing to stringent limits, and together with the elliptical host galaxy this provided evidence in support of an origin for short bursts which is completely different from the massive star origins of their long-duration cousins: the ...
... panying supernova component (expected for nearby long GRBs) found nothing to stringent limits, and together with the elliptical host galaxy this provided evidence in support of an origin for short bursts which is completely different from the massive star origins of their long-duration cousins: the ...
R585 EXPLORERS OF THE SOUTHERN SKY
... axact solutions of the theory of relativity. More preciseley, it describes those models that fit with astronomical observations of galaxy clusters, cosmic voids and ohter key features of our Universe. This authoritative account achieves two important goals. Firstly, it collects together all independ ...
... axact solutions of the theory of relativity. More preciseley, it describes those models that fit with astronomical observations of galaxy clusters, cosmic voids and ohter key features of our Universe. This authoritative account achieves two important goals. Firstly, it collects together all independ ...
Finding Dark Matter
... Classifying events using follow-up • Multi-band observations - “poor man’s spectroscopy” • The ratio of brightness in different “filters” gives a crude measure of the event’s wavelength spectrum – The ratios for “vanilla” stars (i.e. microlensing) differ from supernovae ...
... Classifying events using follow-up • Multi-band observations - “poor man’s spectroscopy” • The ratio of brightness in different “filters” gives a crude measure of the event’s wavelength spectrum – The ratios for “vanilla” stars (i.e. microlensing) differ from supernovae ...
A Cantorian Superfluid Vortex and the Quantization of Planetary
... Furthermore, Castro et al. (2000, 2001) have proposed that the exact dimension of the universe is only a bit higher than Minkowskian 4D (less than 5D). They arrived at this conclusion after reconciling Cantorian spacetime geometry with the so-called Golden Section. Therefore instead of proposing a t ...
... Furthermore, Castro et al. (2000, 2001) have proposed that the exact dimension of the universe is only a bit higher than Minkowskian 4D (less than 5D). They arrived at this conclusion after reconciling Cantorian spacetime geometry with the so-called Golden Section. Therefore instead of proposing a t ...
Dark Weak Force and Condensed Matter Contents
... with nuclei can become dark in this sense and have size of order atomic radius so that dark nuclear physics would have a direct relevance for condensed matter physics. If this happens, it becomes impossible to make a reductionistic separation between nuclear physics and condensed matter physics and ...
... with nuclei can become dark in this sense and have size of order atomic radius so that dark nuclear physics would have a direct relevance for condensed matter physics. If this happens, it becomes impossible to make a reductionistic separation between nuclear physics and condensed matter physics and ...
Astronomy 201 Cosmology
... • Planets do not move on perfect ellipses, but ellipses are precessing. This effects is caused by the perturbing effect of the other planets gravitational field. • Mercury’s precession amounts to 5600” per century, but only 5557” can be explained by Newtonian gravity, leaves a discrepancy of ...
... • Planets do not move on perfect ellipses, but ellipses are precessing. This effects is caused by the perturbing effect of the other planets gravitational field. • Mercury’s precession amounts to 5600” per century, but only 5557” can be explained by Newtonian gravity, leaves a discrepancy of ...
Fall 2007 Joint Meeting American Physical Society American
... case that one can anticipate where great breakthroughs in science will occur, and even harder to anticipate where these breakthroughs will find applications to benefit mankind. In this talk the speaker will trace the development of NMR as an example of a development for which the applications were n ...
... case that one can anticipate where great breakthroughs in science will occur, and even harder to anticipate where these breakthroughs will find applications to benefit mankind. In this talk the speaker will trace the development of NMR as an example of a development for which the applications were n ...
Poetry of Physics and the Physics of Poetry
... the significance of this information. These two activities are by no means independent of each other. One requires a worldview to acquire new knowledge and vice versa one needs knowledge with which to create a worldview. But how does this process begin? Which comes first, the knowledge or the worldv ...
... the significance of this information. These two activities are by no means independent of each other. One requires a worldview to acquire new knowledge and vice versa one needs knowledge with which to create a worldview. But how does this process begin? Which comes first, the knowledge or the worldv ...
A New Science Strategy for Space Astronomy and Astrophysics
... NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The members of the committee ...
... NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The members of the committee ...
Hyperbolic Geometrodynamic Warp Drives
... The initial intent of this E-book was to give a general survey over what has become to be known as the “Warp Drive” class of metrics associated with gravitational physics or more specifically general relativity. The purpose of the warp drive metric survey and related fields given within this E-Book ...
... The initial intent of this E-book was to give a general survey over what has become to be known as the “Warp Drive” class of metrics associated with gravitational physics or more specifically general relativity. The purpose of the warp drive metric survey and related fields given within this E-Book ...
21_Testbank
... C) quasars emit approximately equal power at all wavelengths from infrared to gamma rays D) very high speed orbital motions around galactic nuclei E) all of the above Answer: E 22) The most active galactic nuclei are usually found at large distances from us; relatively few nearby galaxies have activ ...
... C) quasars emit approximately equal power at all wavelengths from infrared to gamma rays D) very high speed orbital motions around galactic nuclei E) all of the above Answer: E 22) The most active galactic nuclei are usually found at large distances from us; relatively few nearby galaxies have activ ...
PH607 – Galaxies
... remarkable trend: virtually all the galaxies they observed were moving away from our galaxy (redshifted) and the recession speed increased with distance. Hubble's first dataset included only a few dozen galaxies which were < 2 Mpc away but his basic conclusion has not changed as more and more gala ...
... remarkable trend: virtually all the galaxies they observed were moving away from our galaxy (redshifted) and the recession speed increased with distance. Hubble's first dataset included only a few dozen galaxies which were < 2 Mpc away but his basic conclusion has not changed as more and more gala ...
Document
... integrated stellar mass of blue galaxies with young stars has not significantly changed since z ~ 1…instead, the growth of the total stellar mass density is dominated by the growth of the total mass in the largely passive galaxies on the red sequence.” Cimatti et al. 2006 A&A 453, L29 -- same conclu ...
... integrated stellar mass of blue galaxies with young stars has not significantly changed since z ~ 1…instead, the growth of the total stellar mass density is dominated by the growth of the total mass in the largely passive galaxies on the red sequence.” Cimatti et al. 2006 A&A 453, L29 -- same conclu ...
THE PRIMORDIAL HELIUM ABUNDANCE Manuel Peimbert
... absorption produced by the ionizing stars, even if in the determination of the Y abundances of nearby H II regions like NGC 346 in the Small Magellanic Cloud it is possible to avoid the ionizing stars in the observing slit, a good fraction of the observed nebular continuum is due to dust scattered l ...
... absorption produced by the ionizing stars, even if in the determination of the Y abundances of nearby H II regions like NGC 346 in the Small Magellanic Cloud it is possible to avoid the ionizing stars in the observing slit, a good fraction of the observed nebular continuum is due to dust scattered l ...
PDF
... can, knowing its redshift, search for companions to a fixed luminosity limit and within 20 kiloparsecs. Projected line-of-sight pairs can be removed statistically. This study revealed, for the first time, a dramatic rise with redshift in the number of likely associated pairs (figure 3). Broadly spea ...
... can, knowing its redshift, search for companions to a fixed luminosity limit and within 20 kiloparsecs. Projected line-of-sight pairs can be removed statistically. This study revealed, for the first time, a dramatic rise with redshift in the number of likely associated pairs (figure 3). Broadly spea ...
The DRIFT Dark Matter Project - School of Physics and Astronomy
... Through the use of a Monte Carlo simulation the neutron and gamma-ray background experienced by DRIFT has been determined and the experimental implications assessed. In addition, the activity of the main neutron calibration source used to calibrate DRIFT modules has been measured and was found to be ...
... Through the use of a Monte Carlo simulation the neutron and gamma-ray background experienced by DRIFT has been determined and the experimental implications assessed. In addition, the activity of the main neutron calibration source used to calibrate DRIFT modules has been measured and was found to be ...
The Bible, Science and Creation
... Origin of universe by the Big Bang Solar system is one of many Earth, moon and planets should have same composition and structure ...
... Origin of universe by the Big Bang Solar system is one of many Earth, moon and planets should have same composition and structure ...
The Celestial Origin of Atoms
... it, we have been working with star dust, carried to us by the wind, and we drink the Universe in a raindrop.” Or again: “We are ash and dust, that may be true, but we are the ash and dust of stars.” This qualitative and poetic, but emotional and even violent, face of astrophysics is the one I lean t ...
... it, we have been working with star dust, carried to us by the wind, and we drink the Universe in a raindrop.” Or again: “We are ash and dust, that may be true, but we are the ash and dust of stars.” This qualitative and poetic, but emotional and even violent, face of astrophysics is the one I lean t ...
eXtremely Fast Tr
... The AGASA cosmic ray experiment has found that the spectrum seems to continue beyond this energy without evidence for a cutoff. This leaves us with a two-fold problem: while it is already difficult to explain how ``traditional'' astrophysical sources can accelerate protons to energies above 10^20 eV ...
... The AGASA cosmic ray experiment has found that the spectrum seems to continue beyond this energy without evidence for a cutoff. This leaves us with a two-fold problem: while it is already difficult to explain how ``traditional'' astrophysical sources can accelerate protons to energies above 10^20 eV ...
Folie 1 - Pi of the Sky
... Probing the high-redshift Universe with Gamma-ray bursts M.I. Andersen ...
... Probing the high-redshift Universe with Gamma-ray bursts M.I. Andersen ...
Relativity and Gravitation
... quadrupole; similar solutions exist in general relativity if the quadrupole moment is not too small. The motion is stable in a wide region, up to a maximum value of the radius, reached at the plane of symmetry; this value coincides exactly with the minimum value of the radius for stable circular orb ...
... quadrupole; similar solutions exist in general relativity if the quadrupole moment is not too small. The motion is stable in a wide region, up to a maximum value of the radius, reached at the plane of symmetry; this value coincides exactly with the minimum value of the radius for stable circular orb ...
Physical cosmology
Physical cosmology is the study of the largest-scale structures and dynamics of the Universe and is concerned with fundamental questions about its origin, structure, evolution, and ultimate fate. For most of human history, it was a branch of metaphysics and religion. Cosmology as a science originated with the Copernican principle, which implies that celestial bodies obey identical physical laws to those on Earth, and Newtonian mechanics, which first allowed us to understand those physical laws.Physical cosmology, as it is now understood, began with the development in 1915 of Albert Einstein's general theory of relativity, followed by major observational discoveries in the 1920s: first, Edwin Hubble discovered that the universe contains a huge number of external galaxies beyond our own Milky Way; then, work by Vesto Slipher and others showed that the universe is expanding. These advances made it possible to speculate about the origin of the universe, and allowed the establishment of the Big Bang Theory, by Georges Lemaitre, as the leading cosmological model. A few researchers still advocate a handful of alternative cosmologies; however, most cosmologists agree that the Big Bang theory explains the observations better.Dramatic advances in observational cosmology since the 1990s, including the cosmic microwave background, distant supernovae and galaxy redshift surveys, have led to the development of a standard model of cosmology. This model requires the universe to contain large amounts of dark matter and dark energy whose nature is currently not well understood, but the model gives detailed predictions that are in excellent agreement with many diverse observations.Cosmology draws heavily on the work of many disparate areas of research in theoretical and applied physics. Areas relevant to cosmology include particle physics experiments and theory, theoretical and observational astrophysics, general relativity, quantum mechanics, and plasma physics.