Doppler effect
... Situations where the Doppler effect can be utilized EXAMPLE: If you look at a rotating luminous object like the sun, you see that one side is moving away from the observer while the other side is approaching the observer. Once again, the formula v = c∆f / f comes into play. The sun’s right side will ...
... Situations where the Doppler effect can be utilized EXAMPLE: If you look at a rotating luminous object like the sun, you see that one side is moving away from the observer while the other side is approaching the observer. Once again, the formula v = c∆f / f comes into play. The sun’s right side will ...
The dynamical lives of high redshift galaxies - dragons
... a WMAP-5 cosmology. Halo finding and tree building was performed in the same way and with the same code versions used for Tiamat. For the purposes of the work we present here, this simulation should provide an adequate comparison between our highest mass high-z Tiamat halos and halos of similar mass ...
... a WMAP-5 cosmology. Halo finding and tree building was performed in the same way and with the same code versions used for Tiamat. For the purposes of the work we present here, this simulation should provide an adequate comparison between our highest mass high-z Tiamat halos and halos of similar mass ...
AN INTENSIVE HUBBLE SPACE TELESCOPE
... this reason, cluster fields were targeted in early SN surveys (e.g., Norgaard-Nielson et al. 1989; Perlmutter et al. 1995; Reiss et al. 1998). Although this strategy became less advantageous with wide field capabilities on ground-based telescopes, the expected boost in the yield of SNe due to the pr ...
... this reason, cluster fields were targeted in early SN surveys (e.g., Norgaard-Nielson et al. 1989; Perlmutter et al. 1995; Reiss et al. 1998). Although this strategy became less advantageous with wide field capabilities on ground-based telescopes, the expected boost in the yield of SNe due to the pr ...
Rest-frame Optical Spectra: A Window into Galaxy Formation at z~2
... • It is now possible to obtain robust, unbiased statistical samples of the gaseous and stellar contents of galaxies at z>1. • We are conducting the MOSDEF survey with MOSFIRE on Keck. The survey leverages existing multi-wavelength datasets in the COSMOS, AEGIS, and GOODS-N fields, and will address ...
... • It is now possible to obtain robust, unbiased statistical samples of the gaseous and stellar contents of galaxies at z>1. • We are conducting the MOSDEF survey with MOSFIRE on Keck. The survey leverages existing multi-wavelength datasets in the COSMOS, AEGIS, and GOODS-N fields, and will address ...
Mnassa Report 2005 - (UCT)
... Dr Medupe visited Bamako and Timbuktu in Mali in January to work with translators on the Astronomy Manuscripts of Timbuktu. He also spent a month at the Department of Physics and Astronomy in Aarhus, Denmark in September to work on a research paper titled “Radial nonadiabatic eigenfunctions in A sta ...
... Dr Medupe visited Bamako and Timbuktu in Mali in January to work with translators on the Astronomy Manuscripts of Timbuktu. He also spent a month at the Department of Physics and Astronomy in Aarhus, Denmark in September to work on a research paper titled “Radial nonadiabatic eigenfunctions in A sta ...
P1 09 Red Shift - Animated Science
... Explain, as fully as you can, how cosmic microwave background radiation fits in with the idea that the Universe, as it now is, began with a big bang. ...
... Explain, as fully as you can, how cosmic microwave background radiation fits in with the idea that the Universe, as it now is, began with a big bang. ...
Indroduction
... The chemical and spectro-photometric aspect are investigated by means of the so-called Evolutionary Population Synthesis (EPS) originally due to Tinsley (1978) (see Tinsley (1980a), and Bruzual (1993) for review), and since then used by many authors (see below for complete referencing). The great ad ...
... The chemical and spectro-photometric aspect are investigated by means of the so-called Evolutionary Population Synthesis (EPS) originally due to Tinsley (1978) (see Tinsley (1980a), and Bruzual (1993) for review), and since then used by many authors (see below for complete referencing). The great ad ...
LISENFELD Ute: Suppression of star formation in compact groups
... Galaxy transi/on in Compact Groups • Galaxies in Compact Groups are interes/ng systems to study galaxy transforma/on because interac/ons between galaxies and with the intragroup medium are frequent. • A gap/canyon was found in their Spitzer IR colors between ac/ve and quiescent galaxies ...
... Galaxy transi/on in Compact Groups • Galaxies in Compact Groups are interes/ng systems to study galaxy transforma/on because interac/ons between galaxies and with the intragroup medium are frequent. • A gap/canyon was found in their Spitzer IR colors between ac/ve and quiescent galaxies ...
ASPEN WORKSHOP 2003
... ellipticals, larger in bluer galaxies, up to few tenths. AI(Red), or AI(Blue) >0.3 suggests interaction, as in half of ULIRGS [as long as they are identified as “single galaxy”!] Simulations show that AI stays above 0.35 for about 700 Myears, but NOT for face-on HDF application: rest frame B morphol ...
... ellipticals, larger in bluer galaxies, up to few tenths. AI(Red), or AI(Blue) >0.3 suggests interaction, as in half of ULIRGS [as long as they are identified as “single galaxy”!] Simulations show that AI stays above 0.35 for about 700 Myears, but NOT for face-on HDF application: rest frame B morphol ...
A dozen new galaxies caught in the act: Gas stripping and extended
... designed for observing Hα emitting objects in the Coma cluster at z=0.0225, and has bell-shaped transmission with a central wavelength of 6712 Å and FWHM of 120 Å (Yagi et al. 2007; ...
... designed for observing Hα emitting objects in the Coma cluster at z=0.0225, and has bell-shaped transmission with a central wavelength of 6712 Å and FWHM of 120 Å (Yagi et al. 2007; ...
General relativity and Its applications - UoN Repository
... Physicists have tried to test and apply the predictions. The aim of this study was to establish the tests , applications and future development of general relativity such as how general relativity can be reconciled with the laws of quantum physics to produce a complete and self-consistent theory of ...
... Physicists have tried to test and apply the predictions. The aim of this study was to establish the tests , applications and future development of general relativity such as how general relativity can be reconciled with the laws of quantum physics to produce a complete and self-consistent theory of ...
Memristors by Quantum Mechanics
... response of resistors, but a QM approach is suggested at the nanoscale where memristive effects are observed. QED radiation precludes any temperature increase to conserve Joule heat. Conservation proceeds by the creation of QED photons that by Einstein’s photoelectric effect create excitons, the pos ...
... response of resistors, but a QM approach is suggested at the nanoscale where memristive effects are observed. QED radiation precludes any temperature increase to conserve Joule heat. Conservation proceeds by the creation of QED photons that by Einstein’s photoelectric effect create excitons, the pos ...
REVIEW Early star-forming galaxies and the reionization of the Universe
... and reionization because detailed studies of this period of cosmic history will reveal the physical processes that originally shaped the galaxies of various luminosities and masses we see around us today. Alternative sources of reionizing photons include material collapsing into early black holes th ...
... and reionization because detailed studies of this period of cosmic history will reveal the physical processes that originally shaped the galaxies of various luminosities and masses we see around us today. Alternative sources of reionizing photons include material collapsing into early black holes th ...
Practical cosmology with the Local Volume galaxies
... While having accurate velocities and distances for ~250 LV galaxies, one can study distribution of peculiar velocities within the Volume. A peculiar velocity map for the LV galaxies in the LG reference frame shows the local Hubble flow to be generally calm with peculiar velocity variations within ± ...
... While having accurate velocities and distances for ~250 LV galaxies, one can study distribution of peculiar velocities within the Volume. A peculiar velocity map for the LV galaxies in the LG reference frame shows the local Hubble flow to be generally calm with peculiar velocity variations within ± ...
Redshift
In physics, redshift happens when light or other electromagnetic radiation from an object is increased in wavelength, or shifted to the red end of the spectrum. In general, whether or not the radiation is within the visible spectrum, ""redder"" means an increase in wavelength – equivalent to a lower frequency and a lower photon energy, in accordance with, respectively, the wave and quantum theories of light.Some redshifts are an example of the Doppler effect, familiar in the change of apparent pitches of sirens and frequency of the sound waves emitted by speeding vehicles. A redshift occurs whenever a light source moves away from an observer. Another kind of redshift is cosmological redshift, which is due to the expansion of the universe, and sufficiently distant light sources (generally more than a few million light years away) show redshift corresponding to the rate of increase in their distance from Earth. Finally, gravitational redshift is a relativistic effect observed in electromagnetic radiation moving out of gravitational fields. Conversely, a decrease in wavelength is called blueshift and is generally seen when a light-emitting object moves toward an observer or when electromagnetic radiation moves into a gravitational field. However, redshift is a more common term and sometimes blueshift is referred to as negative redshift.Knowledge of redshifts and blueshifts has been applied to develop several terrestrial technologies such as Doppler radar and radar guns. Redshifts are also seen in the spectroscopic observations of astronomical objects. Its value is represented by the letter z.A special relativistic redshift formula (and its classical approximation) can be used to calculate the redshift of a nearby object when spacetime is flat. However, in many contexts, such as black holes and Big Bang cosmology, redshifts must be calculated using general relativity. Special relativistic, gravitational, and cosmological redshifts can be understood under the umbrella of frame transformation laws. There exist other physical processes that can lead to a shift in the frequency of electromagnetic radiation, including scattering and optical effects; however, the resulting changes are distinguishable from true redshift and are not generally referred to as such (see section on physical optics and radiative transfer).