Cosmic Microwave Background Anisotropies:
... • We have a program of Japanese government, Global Center of Excellence Program (GCOE). This Global COE recruits graduate students. For those who are interested in doing their PhD work on particle physics, cosmology, astrophysics, please contact me! We are also planning to have a winter school in Fe ...
... • We have a program of Japanese government, Global Center of Excellence Program (GCOE). This Global COE recruits graduate students. For those who are interested in doing their PhD work on particle physics, cosmology, astrophysics, please contact me! We are also planning to have a winter school in Fe ...
Feedback in low-mass galaxies in the early Universe
... lthough feedback from star formation is a complex phenomenon involving many processes over a wide range of physical scales, its most basic consequences are not difficult to understand: stars form out of gas, and therefore any process which either removes gas from a galaxy or prevents gas from conden ...
... lthough feedback from star formation is a complex phenomenon involving many processes over a wide range of physical scales, its most basic consequences are not difficult to understand: stars form out of gas, and therefore any process which either removes gas from a galaxy or prevents gas from conden ...
The evolution of spiral galaxies in clusters Kutdemir, Elif
... Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. ...
... Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. ...
ASTR 610 Theory of Galaxy Formation
... As is immediate evident from its definition, ⇠12 is the excess probability, relative to Poisson, that two galaxies (points) are separated by a distance r12 The two-point correlation function of galaxies is typically measured using ...
... As is immediate evident from its definition, ⇠12 is the excess probability, relative to Poisson, that two galaxies (points) are separated by a distance r12 The two-point correlation function of galaxies is typically measured using ...
page proofs
... In parallel to the experimental work of Shapley, Hubble and other astronomers, theoretical physics was making tremendous progress. In particular, Albert Einstein published his General Theory of Relativity in 1915, which provided a new way of understanding gravity. Until then, scientists had used Isa ...
... In parallel to the experimental work of Shapley, Hubble and other astronomers, theoretical physics was making tremendous progress. In particular, Albert Einstein published his General Theory of Relativity in 1915, which provided a new way of understanding gravity. Until then, scientists had used Isa ...
FIRST LIGHT IN THE UNIVERSE
... • In practice, these samples are contaminated by foreground stars, z~2 galaxies etc to an extent which remains controversial. We are unlikely to resolve this definitively with spectroscopy until era of ELTs. • Comoving SF rate declines from z~3 to z~6 (and probably beyond) suggesting insufficient 6< ...
... • In practice, these samples are contaminated by foreground stars, z~2 galaxies etc to an extent which remains controversial. We are unlikely to resolve this definitively with spectroscopy until era of ELTs. • Comoving SF rate declines from z~3 to z~6 (and probably beyond) suggesting insufficient 6< ...
Star formation in luminous quasar host galaxies at z = 1–2 ⋆
... the luminosity range −24 ≤ MV ≤ −25, allowing them to be compared directly to each other and to the quasars in our lower redshift samples (M99; D03; F04). However, the results presented by K01 were at odds with this criterion, with one z ∼ 2 quasar shining close to MV = −27, and the z ≈ 2 RQQs being ...
... the luminosity range −24 ≤ MV ≤ −25, allowing them to be compared directly to each other and to the quasars in our lower redshift samples (M99; D03; F04). However, the results presented by K01 were at odds with this criterion, with one z ∼ 2 quasar shining close to MV = −27, and the z ≈ 2 RQQs being ...
URL
... both small, then the ratio of galaxy to matter density must be close to unity, (1 + hOM )/(l + OM) = 1. It follows that the bias will be close to unity at later, non-linear epochs when OM is no longer small. Conversely, if bias is in fact important at the present, non-linear epoch (as may well be th ...
... both small, then the ratio of galaxy to matter density must be close to unity, (1 + hOM )/(l + OM) = 1. It follows that the bias will be close to unity at later, non-linear epochs when OM is no longer small. Conversely, if bias is in fact important at the present, non-linear epoch (as may well be th ...
Joint formation of QSOs and spheroids: QSOs as clocks of star
... In the introduction we have reviewed several pieces of evidence suggesting that star formation begins in the hosting spheroids at a time t* and proceeds vigoursly at least until the time tQSO, when the QSO shines. Here we estimate the duration of the star formation phase and its possible dependence ...
... In the introduction we have reviewed several pieces of evidence suggesting that star formation begins in the hosting spheroids at a time t* and proceeds vigoursly at least until the time tQSO, when the QSO shines. Here we estimate the duration of the star formation phase and its possible dependence ...
Galaxy Classification Much of modern extragalactic astronomy deals
... In this method, supergiant galaxies with well-developed bright spiral arms and bars have the Roman numeral I (like supergiant stars), and small, low-surface-brightness, irregular galaxies have the roman numeral V. Of course, since one doesn’t usually know a galaxy’s distance, it is somewhat difficul ...
... In this method, supergiant galaxies with well-developed bright spiral arms and bars have the Roman numeral I (like supergiant stars), and small, low-surface-brightness, irregular galaxies have the roman numeral V. Of course, since one doesn’t usually know a galaxy’s distance, it is somewhat difficul ...
Recent star formation in local, morphologically disturbed
... of this paper, we do not find compelling evidence of strong AGN activity in the vD05 sample. 3.2 Spatial distributions and UV–optical colours We begin by studying some basic properties of the vD05 objects. Fig. 2 indicates the spatial coordinates (RA, Dec. and redshift) of the galaxy sample (top) an ...
... of this paper, we do not find compelling evidence of strong AGN activity in the vD05 sample. 3.2 Spatial distributions and UV–optical colours We begin by studying some basic properties of the vD05 objects. Fig. 2 indicates the spatial coordinates (RA, Dec. and redshift) of the galaxy sample (top) an ...
A bright, dust-obscured, millimetre
... (PSF) of the instrument by less than 0.5 arcsec and suppresses the point source response by an amount that is negligible compared to the photometric error. To identify the correct optical/IR counterpart to MMJ065837−5557.0 we next check for any systematic offset in the pointing, which could be mecha ...
... (PSF) of the instrument by less than 0.5 arcsec and suppresses the point source response by an amount that is negligible compared to the photometric error. To identify the correct optical/IR counterpart to MMJ065837−5557.0 we next check for any systematic offset in the pointing, which could be mecha ...
Quasars
... Lobes sometimes linked to nucleus by thin filaments called radio jets (relativistic: particles moving at velocities close to c) ...
... Lobes sometimes linked to nucleus by thin filaments called radio jets (relativistic: particles moving at velocities close to c) ...
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).