Galaxy Assembly through Mergers
... of star formation to severe morphological changes. On the other hand, for mergers between elliptical, gas-poor galaxies, the apparent absence of strong perturbations poses another challenge, even though, given their massive nature, they may be responsible for the high mass end of the mass function. ...
... of star formation to severe morphological changes. On the other hand, for mergers between elliptical, gas-poor galaxies, the apparent absence of strong perturbations poses another challenge, even though, given their massive nature, they may be responsible for the high mass end of the mass function. ...
Niraj D. Welikala Thesis - D-Scholarship@Pitt
... dark matter halos and just like the dark matter halos, undergo hierarchical merging, with smaller galaxies merging to become larger ones. In this picture, the clusters of galaxies we see today, such as the Coma cluster, shown in the top left panel of Figure 1.2 must have been assembled from this mas ...
... dark matter halos and just like the dark matter halos, undergo hierarchical merging, with smaller galaxies merging to become larger ones. In this picture, the clusters of galaxies we see today, such as the Coma cluster, shown in the top left panel of Figure 1.2 must have been assembled from this mas ...
The VIMOS Ultra-Deep Survey (VUDS): Fast Increase in the Fraction
... tons are easily scattered, shifted in frequency, and absorbed by the neutral hydrogen and/or by the dust. As a result, in general, Lyα emission is more attenuated than other UV photons, with the Lyα escape fraction (i.e., the fraction of the Lyα photons that escape the galaxies) that depends strongl ...
... tons are easily scattered, shifted in frequency, and absorbed by the neutral hydrogen and/or by the dust. As a result, in general, Lyα emission is more attenuated than other UV photons, with the Lyα escape fraction (i.e., the fraction of the Lyα photons that escape the galaxies) that depends strongl ...
ROSAT Ian R. Stevens* and David K. Strickland*
... and NGC 5408) and were detected (though the case is marginal for NGC 2366), while the other three were observed serendipitously and were not detected. A similar dichotomy was also found for the WR galaxies in SS98. WR galaxies are a subset of emission-line (EL) galaxies. Conti (1991) listed a small ...
... and NGC 5408) and were detected (though the case is marginal for NGC 2366), while the other three were observed serendipitously and were not detected. A similar dichotomy was also found for the WR galaxies in SS98. WR galaxies are a subset of emission-line (EL) galaxies. Conti (1991) listed a small ...
... The relative importance of the different physical processes of galaxy evolution (Figure 1) changes as the Universe expands. Rapid processes that happen in discrete events are giving way to slow, ongoing processes. At early times, galactic evolution was dominated by a combination of dissipative colla ...
The Evolution of Star Formation Activity in . Cory R. Wagner
... z ∼ 1.5 → 1.16, we find that new cluster early-type galaxies are likely being formed i ...
... z ∼ 1.5 → 1.16, we find that new cluster early-type galaxies are likely being formed i ...
doc
... DOES THE CRONIN PEAK DISAPPEAR? P34 ARE JETS QUENCHED IN COLD NUCLEI? P35 ENERGY LOSS OF HIGH ENERGY PARTONS IN HOT QGP AND HIGH PT PHOTONS P35 Calculation of Hard Probe - Medium Interactions in 3D-Hydrodynamics P36 Quark and gluon jet conversions in the quark-gluon plasma P36 Parton Energy Loss at ...
... DOES THE CRONIN PEAK DISAPPEAR? P34 ARE JETS QUENCHED IN COLD NUCLEI? P35 ENERGY LOSS OF HIGH ENERGY PARTONS IN HOT QGP AND HIGH PT PHOTONS P35 Calculation of Hard Probe - Medium Interactions in 3D-Hydrodynamics P36 Quark and gluon jet conversions in the quark-gluon plasma P36 Parton Energy Loss at ...
PHYSICS AND ASTRONOMY
... to describe and provide an understanding of both our world and our universe. Physics serves as the underpinning of many different disciplines including the other natural sciences and technological areas. Graduates are proficient in the methods of rigorous scientific analysis, relevant mathematical t ...
... to describe and provide an understanding of both our world and our universe. Physics serves as the underpinning of many different disciplines including the other natural sciences and technological areas. Graduates are proficient in the methods of rigorous scientific analysis, relevant mathematical t ...
THE UV-OPTICAL COLOR MAGNITUDE DIAGRAM. II. PHYSICAL
... We use the UV-optical color magnitude diagram in combination with spectroscopic and photometric measurements derived from the SDSS spectroscopic sample to measure the distribution of galaxies in the local universe (z < 0:25) and their physical properties as a function of specific star formation rate ...
... We use the UV-optical color magnitude diagram in combination with spectroscopic and photometric measurements derived from the SDSS spectroscopic sample to measure the distribution of galaxies in the local universe (z < 0:25) and their physical properties as a function of specific star formation rate ...
Probing nuclear activity versus star formation at z ∼ 0.8 using near
... as the AGN contributes to both the continuum and the emission line spectrum. Thus, estimates of the SFRs of powerful AGN, as for example quasars, will be contaminated with AGN emission to a certain extent. On the other hand, the SFRs of deeply buried and optically dull AGN obtained from Hα emission ...
... as the AGN contributes to both the continuum and the emission line spectrum. Thus, estimates of the SFRs of powerful AGN, as for example quasars, will be contaminated with AGN emission to a certain extent. On the other hand, the SFRs of deeply buried and optically dull AGN obtained from Hα emission ...
environmental effects on galaxy evolution in nearby clusters
... The environmental effects on galaxy evolution in nearby clusters are investigated using a multiwavelength dataset. The present analysis is focused on the properties of three (Abell 1367, Virgo and Coma) among the best studied clusters in the local Universe. Due to the variety of their environmental ...
... The environmental effects on galaxy evolution in nearby clusters are investigated using a multiwavelength dataset. The present analysis is focused on the properties of three (Abell 1367, Virgo and Coma) among the best studied clusters in the local Universe. Due to the variety of their environmental ...
Hubble 2006: Science Year in Review
... The servicing mission in 1999 enhanced many of Hubble’s subsystems, including the central computer, a new solid-state data-recording system to replace the aging magnetic tape drives, and the gyroscopes needed for pointing control. A month prior to launch, a gyroscope failure had forced Hubble into ...
... The servicing mission in 1999 enhanced many of Hubble’s subsystems, including the central computer, a new solid-state data-recording system to replace the aging magnetic tape drives, and the gyroscopes needed for pointing control. A month prior to launch, a gyroscope failure had forced Hubble into ...
The most metal-poor galaxies
... the process of formation, because of their extreme metal under-abundance, more than 10 times less than solar, and even more extreme than that of HII regions found in the outskirts of spiral galaxies. At the time of this discovery the general wisdom that most galaxies (in particular the ellipticals) ...
... the process of formation, because of their extreme metal under-abundance, more than 10 times less than solar, and even more extreme than that of HII regions found in the outskirts of spiral galaxies. At the time of this discovery the general wisdom that most galaxies (in particular the ellipticals) ...
The correlation between galaxy morphology and star
... to ∼ 2-orbit depth within all five CANDELS fields. In this study, we use the 4-epoch ( about 2 orbits) CANDELS F160W(H-band) imaging that covers about 115 square arc minutes (∼ 2/3 of the whole GOODS-S) including the GOODS-S deep region, plus the ERS (Windhorst et al. 2011). This survey has a 5σ lim ...
... to ∼ 2-orbit depth within all five CANDELS fields. In this study, we use the 4-epoch ( about 2 orbits) CANDELS F160W(H-band) imaging that covers about 115 square arc minutes (∼ 2/3 of the whole GOODS-S) including the GOODS-S deep region, plus the ERS (Windhorst et al. 2011). This survey has a 5σ lim ...
SEARCHING for a QCD MIXED PHASE at the NUCLOTRON
... • Just two years ago, Rob Pisarski and Larry McLerran found out that in dense QCD chiral symmetry restoration may not be accompanied with deconfinement and suggested that in the yet unexplored highdensity corner of the QCD phase diagram we shall find “quarkyonic matter”, a quantum liquid of confine ...
... • Just two years ago, Rob Pisarski and Larry McLerran found out that in dense QCD chiral symmetry restoration may not be accompanied with deconfinement and suggested that in the yet unexplored highdensity corner of the QCD phase diagram we shall find “quarkyonic matter”, a quantum liquid of confine ...
The Einstein Hoax
... Collected Papers of Albert Einstein, Princeton University Press). Where he failed was in his French test; the Swiss were very picky about French, and although it seems Einstein's French essay was very good, it was not good enough to satisfy the high standards of the picky French professors. Further ...
... Collected Papers of Albert Einstein, Princeton University Press). Where he failed was in his French test; the Swiss were very picky about French, and although it seems Einstein's French essay was very good, it was not good enough to satisfy the high standards of the picky French professors. Further ...
THE STAR FORMATION AND NUCLEAR ACCRETION HISTORIES OF NORMAL GALAXIES
... ∼ 1 and, if so, they could produce a substantial fraction of the “normal” galaxy X-ray flux at these redshifts. Given their similar evolution, spectral shapes (e.g., Ptak et al. 1999), and potentially similar luminosities, it may be difficult to disentangle the X-ray emission from AGNs and star form ...
... ∼ 1 and, if so, they could produce a substantial fraction of the “normal” galaxy X-ray flux at these redshifts. Given their similar evolution, spectral shapes (e.g., Ptak et al. 1999), and potentially similar luminosities, it may be difficult to disentangle the X-ray emission from AGNs and star form ...
Chapter 5 The Evolutionary Paths Of Nearby Galaxies
... factor ∼2, while surprisingly the stellar mass density of the blue cloud has remained ...
... factor ∼2, while surprisingly the stellar mass density of the blue cloud has remained ...
Stellar Populations of Dwarf Elliptical Galaxies: UBVRI Photometry
... Group, dwarf elliptical galaxies out number high luminosity galaxies by a factor of 6 (Mateo 1998), and more than 50% of the galaxies in the Virgo cluster are dEs (Sandage, Binggeli, & Tammann 1985). However, while the clustering properties of dwarf elliptical galaxies appear to be an extension of t ...
... Group, dwarf elliptical galaxies out number high luminosity galaxies by a factor of 6 (Mateo 1998), and more than 50% of the galaxies in the Virgo cluster are dEs (Sandage, Binggeli, & Tammann 1985). However, while the clustering properties of dwarf elliptical galaxies appear to be an extension of t ...
Type Ia supernovae as stellar endpoints and cosmological tools
... because dark energy is so dilute (1 m3 contains the energy equivalent to a few atoms of hydrogen), its effects can only be seen on vast scales. We must compare supernovae across ~10 Gyr of cosmic time, during which stars and galaxies have undergone substantial evolution. Therefore, it is critical to ...
... because dark energy is so dilute (1 m3 contains the energy equivalent to a few atoms of hydrogen), its effects can only be seen on vast scales. We must compare supernovae across ~10 Gyr of cosmic time, during which stars and galaxies have undergone substantial evolution. Therefore, it is critical to ...
Introduction: A Road Well-Traveled
... fathers, the God of Abraham, of Isaac, and of Jacob, appeared unto me, saying, I have surely visited you, and seen that which is done to you in Egypt: 17 And I have said, I will bring you up out of the affliction of Egypt unto the land of the Canaanites, and the Hittites, and the Amorites, and the P ...
... fathers, the God of Abraham, of Isaac, and of Jacob, appeared unto me, saying, I have surely visited you, and seen that which is done to you in Egypt: 17 And I have said, I will bring you up out of the affliction of Egypt unto the land of the Canaanites, and the Hittites, and the Amorites, and the P ...
Spectacular Evidence of the Greatness of Almighty Allah
... Allah Almighty created the planet Jupiter, the larger than ...
... Allah Almighty created the planet Jupiter, the larger than ...
Preliminary Talk Abstract Book - MoCA
... from dark matter halos to the Inter-Galactic Medium. I will first review the microphysics of this process, highlighting the various forms of feedback that emerge from star formation: radiation pressure, ionising light, stellar winds, SN explosions not to mention the production of metals and dust. Th ...
... from dark matter halos to the Inter-Galactic Medium. I will first review the microphysics of this process, highlighting the various forms of feedback that emerge from star formation: radiation pressure, ionising light, stellar winds, SN explosions not to mention the production of metals and dust. Th ...
The Day We Found the Universe
... clouds were being sighted in the heavens; these faint celestial objects were lurking wherever a telescope gazed away from the Milky Way into deep space. Were these spiral nebulae close to us or were they farther o ? No one knew, because at the turn of the twentieth century astronomers didn't yet hav ...
... clouds were being sighted in the heavens; these faint celestial objects were lurking wherever a telescope gazed away from the Milky Way into deep space. Were these spiral nebulae close to us or were they farther o ? No one knew, because at the turn of the twentieth century astronomers didn't yet hav ...
Worlds Beyond The Poles
... Universe of land, water, oxygen, and vegetation, where human and other forms of animal life abound. This is not a work of fiction, nor is it a technical analysis of anything. It is a simple recital of fact which transcends the most elaborate fiction ever conceived. It is diametrically opposed to the ...
... Universe of land, water, oxygen, and vegetation, where human and other forms of animal life abound. This is not a work of fiction, nor is it a technical analysis of anything. It is a simple recital of fact which transcends the most elaborate fiction ever conceived. It is diametrically opposed to the ...
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.