Teaching Tips Table of Contents - Hubble Deep Field
... By the end of 8th grade, students should know that ...
... By the end of 8th grade, students should know that ...
original version
... interacting and merging galaxies (Classes C, B and A) form stars at a lower rate than might be expected from their mass and type. We thus see that many interacting galaxies have no enhanced (S)SFR at all. 3.3. Interactions Do Increase the (S)SFR, but Not by Much The median SFR and SSFR enhancement v ...
... interacting and merging galaxies (Classes C, B and A) form stars at a lower rate than might be expected from their mass and type. We thus see that many interacting galaxies have no enhanced (S)SFR at all. 3.3. Interactions Do Increase the (S)SFR, but Not by Much The median SFR and SSFR enhancement v ...
CONNECTING ANGULAR MOMENTUM AND GALACTIC DYNAMICS
... type and concluded that disks are predominantly formed in halos where the freshly accreted gas has similar angular momentum to that of earlier accretion, whereas spheroids tend to form in halos where gas streams in along misaligned cold flows. Kimm et al. (2011) studied the different behavior of the ...
... type and concluded that disks are predominantly formed in halos where the freshly accreted gas has similar angular momentum to that of earlier accretion, whereas spheroids tend to form in halos where gas streams in along misaligned cold flows. Kimm et al. (2011) studied the different behavior of the ...
Quasars and Blazars
... is capable of taking spectra of 400 objects simultaneously. It thus is able to observe many more sources than previous surveys. The input catalogue contains over 46,000 objects, selected according to their U −B/B −R colours (from APM scans of UK Schmidt plates), and the survey is expected to find so ...
... is capable of taking spectra of 400 objects simultaneously. It thus is able to observe many more sources than previous surveys. The input catalogue contains over 46,000 objects, selected according to their U −B/B −R colours (from APM scans of UK Schmidt plates), and the survey is expected to find so ...
A fundamental metallicity relation for galaxies at z = 0.84–1.47 from
... In total we observed six FMOS fields of view, integrating for one hour each in both the J-Long and H-Long wavebands on the nights of 2012 May 4 and 5 in 0.6–0.8 arcsec optical seeing conditions (Proposal ID: S12A-062). These are divided into two COSMOS fields, three Bootes fields and one Elais-N1 fi ...
... In total we observed six FMOS fields of view, integrating for one hour each in both the J-Long and H-Long wavebands on the nights of 2012 May 4 and 5 in 0.6–0.8 arcsec optical seeing conditions (Proposal ID: S12A-062). These are divided into two COSMOS fields, three Bootes fields and one Elais-N1 fi ...
here - ISAS/JAXA
... Christopher Fuller Galaxy Evolution in Coma, Fornax and Virgo nearby and Clusters as seen by Herschel Yusei Koyama SPICA distant cluster survey: unveiling the dust-obscured star formation activity triggered by young cluster environments Kazumi Murata Environmental dependence of galaxy properties rev ...
... Christopher Fuller Galaxy Evolution in Coma, Fornax and Virgo nearby and Clusters as seen by Herschel Yusei Koyama SPICA distant cluster survey: unveiling the dust-obscured star formation activity triggered by young cluster environments Kazumi Murata Environmental dependence of galaxy properties rev ...
FY1995 Q1 Oct-Dec NO.. - National Optical Astronomy Observatory
... 2. Detection of Lens Candidates for the Double Quasar Q2345+007 The object called Q2345+007 AB is actually a pair of quasars that appear to lie about 7" apart on the sky. The two components (A and B) have very similar spectra and redshifts (z = 2.15), raising the possibility that the pair is part of ...
... 2. Detection of Lens Candidates for the Double Quasar Q2345+007 The object called Q2345+007 AB is actually a pair of quasars that appear to lie about 7" apart on the sky. The two components (A and B) have very similar spectra and redshifts (z = 2.15), raising the possibility that the pair is part of ...
Rich Clusters of Galaxies
... Module 8: Clusters of Galaxies. • General properties, masses and mass-to-light ratios, galaxy interactions, dynamic stability, the inter-galactic medium, magnetic fields, x-ray emission, • Virial temperature, gravitational lensing, dark matter content, mass derived ...
... Module 8: Clusters of Galaxies. • General properties, masses and mass-to-light ratios, galaxy interactions, dynamic stability, the inter-galactic medium, magnetic fields, x-ray emission, • Virial temperature, gravitational lensing, dark matter content, mass derived ...
The KMOS Redshift One Spectroscopic Survey
... high redshift galaxies with much greater efficiency. KMOS allows for simultaneous observations with up to 24 IFUs within a 7.2 arcminute diameter radius and is thus perfectly suited to such a task. The KMOS Redshift One Spectroscopic Survey (KROSS) is a European Southern Observatory (ESO) guaranteed ...
... high redshift galaxies with much greater efficiency. KMOS allows for simultaneous observations with up to 24 IFUs within a 7.2 arcminute diameter radius and is thus perfectly suited to such a task. The KMOS Redshift One Spectroscopic Survey (KROSS) is a European Southern Observatory (ESO) guaranteed ...
Galactic Evolution - Harvard-Smithsonian Center for Astrophysics
... Chance and Necessity Chance is surely a factor throughout all aspects of cosmic evolution. Although we now know that chance cannot be the sole instrument of change in the Universe, chance does play an integral role across the arrow of time. Even as long ago as 1692, Newton reasoned that a uniform, s ...
... Chance and Necessity Chance is surely a factor throughout all aspects of cosmic evolution. Although we now know that chance cannot be the sole instrument of change in the Universe, chance does play an integral role across the arrow of time. Even as long ago as 1692, Newton reasoned that a uniform, s ...
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).