Local Group Encyclopedia of Astronomy & Astrophysics eaa.iop.org Mario L Mateo
... our own. These nearby systems also provide our clearest views of how galaxies interact with one another in the relatively small volume of space of the Local Group. The brightest members of the Local Group are so close to us that on a clear, dark night away from city lights it is possible to see them ...
... our own. These nearby systems also provide our clearest views of how galaxies interact with one another in the relatively small volume of space of the Local Group. The brightest members of the Local Group are so close to us that on a clear, dark night away from city lights it is possible to see them ...
PH607lec08
... Lower low (less metals) Dynamics Bulge/halo Disk dominated, so dom. rotation The Colour-Magnitude Diagram: ...
... Lower low (less metals) Dynamics Bulge/halo Disk dominated, so dom. rotation The Colour-Magnitude Diagram: ...
Dynamical properties of a large young disk galaxy at z=2.03⋆
... They constitute half of the most rest-frame luminous galaxies (LV > 6 × 1010 h−2 70 L⊙ ) and their number density exceeds model predictions (e.g., Mo et al., 1998) by a factor of two. Obviously, the first and foremost question that needs to be resolved is whether these objects are truly rotationally ...
... They constitute half of the most rest-frame luminous galaxies (LV > 6 × 1010 h−2 70 L⊙ ) and their number density exceeds model predictions (e.g., Mo et al., 1998) by a factor of two. Obviously, the first and foremost question that needs to be resolved is whether these objects are truly rotationally ...
Rest-frame Optical Spectra: A Window into Galaxy Formation at z~2
... • With a statistical sample already in early MOSDEF data, we can see that the offset is real! • If line ratios are different in high redshift galaxies, suggests differences in physical conditions in HII regions. • Higher ionization parameter (geometry of stars relative to gas); harder ionizing ra ...
... • With a statistical sample already in early MOSDEF data, we can see that the offset is real! • If line ratios are different in high redshift galaxies, suggests differences in physical conditions in HII regions. • Higher ionization parameter (geometry of stars relative to gas); harder ionizing ra ...
Summary of Talks at Growing Black Holes 2004 in Garching
... High X/O objects don’t seem to have any local counterparts. They have redder colors in near IR than even EROs. (E.g., z-K of 3 to 6 <-> z-K of 2 for other AGN) They are studying them with Spitzer as part of the GOODS program. Using both CDFS, CDFN. Spitzer detects all of them! They are red at al ...
... High X/O objects don’t seem to have any local counterparts. They have redder colors in near IR than even EROs. (E.g., z-K of 3 to 6 <-> z-K of 2 for other AGN) They are studying them with Spitzer as part of the GOODS program. Using both CDFS, CDFN. Spitzer detects all of them! They are red at al ...
Module 11.1.1: Galaxies: Morphology and the Hubble Sequence
... [slide 2] First, we'll talk about morphology and classification. You can think of galaxies as the basic constituents of the universe, obviously distinct units when you look at the sky. And the reason ...
... [slide 2] First, we'll talk about morphology and classification. You can think of galaxies as the basic constituents of the universe, obviously distinct units when you look at the sky. And the reason ...
A non-LTE analysis of the hot subdwarf O star BD+28°4211
... in the optical with model lines bear important uncertainties. This is mostly due to the so-called Balmer line problem, first reported by Napiwotzki (1992, 1993) in hot central stars of old planetary nebulae. Basically, this problem is the inability of simultaneously reproducing the observed Balmer l ...
... in the optical with model lines bear important uncertainties. This is mostly due to the so-called Balmer line problem, first reported by Napiwotzki (1992, 1993) in hot central stars of old planetary nebulae. Basically, this problem is the inability of simultaneously reproducing the observed Balmer l ...
Project Description - SDSS-III
... Universe imprint a characteristic scale on the clustering of dark matter, galaxies, and intergalactic gas. By measuring this scale with tracers seen at different redshifts, we can create a “Hubble diagram” of unprecedented precision covering most of cosmic history and can thereby pin down the prope ...
... Universe imprint a characteristic scale on the clustering of dark matter, galaxies, and intergalactic gas. By measuring this scale with tracers seen at different redshifts, we can create a “Hubble diagram” of unprecedented precision covering most of cosmic history and can thereby pin down the prope ...
IXO as an observatory in the large telescopes era
... , and the estimated number density is even higher than that of Compton-thin AGNs at the same luminosity and redshift range. If there is a large population of such objects at cosmological redshifts, they could make a major contribution to the total accretion power (Fabian & Iwasawa 1999). This can ch ...
... , and the estimated number density is even higher than that of Compton-thin AGNs at the same luminosity and redshift range. If there is a large population of such objects at cosmological redshifts, they could make a major contribution to the total accretion power (Fabian & Iwasawa 1999). This can ch ...
Mylavaram - Intellectual Archive
... but converts time as a relative concept. This is the most serious blunder which the physicists have committed. In Special Theory of Relativity, Einstein without assigning any reason to the invariability of velocity of electromagnetic radiation in the first postulate has assumed that laws of physics ...
... but converts time as a relative concept. This is the most serious blunder which the physicists have committed. In Special Theory of Relativity, Einstein without assigning any reason to the invariability of velocity of electromagnetic radiation in the first postulate has assumed that laws of physics ...
Astrophysics Lab “A”
... Ṁ (sun): approx. 10−14 M⊙ /yr (corresponding to a “Baltic Sea mass” per year or a “Great Salt Lake mass” per day). ...
... Ṁ (sun): approx. 10−14 M⊙ /yr (corresponding to a “Baltic Sea mass” per year or a “Great Salt Lake mass” per day). ...
A Brief History of Time - Stephen Hawking
... toward every other body by a force that was stronger the more massive the bodies and the closer they were to each other. It was this same force that caused objects to fall to the ground. (The story that Newton was inspired by an apple hitting his head is almost certainly apocryphal. All Newton himse ...
... toward every other body by a force that was stronger the more massive the bodies and the closer they were to each other. It was this same force that caused objects to fall to the ground. (The story that Newton was inspired by an apple hitting his head is almost certainly apocryphal. All Newton himse ...
ASTRONOMY AND ASTROPHYSICS (ASTRO)
... stars, to understand the past and future of our Sun, the Milky Way galaxy and the other galaxies in the universe. Basic concepts of cosmology, dark matter and dark energy. Use of computer models to calculate the structure and evolution of stars and protostars, and to analyze actual astronomical data ...
... stars, to understand the past and future of our Sun, the Milky Way galaxy and the other galaxies in the universe. Basic concepts of cosmology, dark matter and dark energy. Use of computer models to calculate the structure and evolution of stars and protostars, and to analyze actual astronomical data ...
The chemical enrichment of the ICM from hydrodynamical simulations
... galaxy formation is studied (e.g., Diaferio et al. 2001; De Lucia et al. 2004; Nagashima et al. 2005, for applications of SAMs to the cluster galaxies). In this sense, the description of the chemical evolution model, as we provide here, can be used for both hydrodynamical simulations and for SAMs. I ...
... galaxy formation is studied (e.g., Diaferio et al. 2001; De Lucia et al. 2004; Nagashima et al. 2005, for applications of SAMs to the cluster galaxies). In this sense, the description of the chemical evolution model, as we provide here, can be used for both hydrodynamical simulations and for SAMs. I ...
Chapter 1: Our Place in the Universe
... • How big is the Earth compared to our solar system? • On a scale of 1-to-10 billion, the Sun is about the size of a grapefruit. The Earth is the size of a ball point about 15 m away. The distance between planets are huge compared to their ...
... • How big is the Earth compared to our solar system? • On a scale of 1-to-10 billion, the Sun is about the size of a grapefruit. The Earth is the size of a ball point about 15 m away. The distance between planets are huge compared to their ...
How To Find Newborn Black Holes Kazumi Kashiyama (UCB)
... evaluated the strength of the shock that reached the hydrogen envelope. Using the full neutrino loss model, we found in every case tested for RSG15 and in 3 of 6 tested for RSG25 that the shock produced was larger than 1×1047 ergs, the approximate binding energy of the envelope (see Table 3). We can ...
... evaluated the strength of the shock that reached the hydrogen envelope. Using the full neutrino loss model, we found in every case tested for RSG15 and in 3 of 6 tested for RSG25 that the shock produced was larger than 1×1047 ergs, the approximate binding energy of the envelope (see Table 3). We can ...
ASTRONOMIA SPAIN inglés.qxd
... first brown dwarf, the confirmation of the presence of black holes in binary stars, models for novae and supernovae, the role of magnetic fields in the rotation pattern of galaxies, sunspots phenomena, the methane cycle in Titan, the impacts of volatile material on the Moon, the discovery of a spher ...
... first brown dwarf, the confirmation of the presence of black holes in binary stars, models for novae and supernovae, the role of magnetic fields in the rotation pattern of galaxies, sunspots phenomena, the methane cycle in Titan, the impacts of volatile material on the Moon, the discovery of a spher ...
Gas fraction and star formation efficiency at z \< 1.0⋆⋆⋆⋆⋆⋆
... 2008). The average molecular gas density can be traced by the CO excitation, measured from line ratios of the CO ladder (e.g. Weiss et al. 2007). Another intervening factor is an external dynamical trigger of star formation, such as galaxy interactions or accretion by cold gas. Both effects are expec ...
... 2008). The average molecular gas density can be traced by the CO excitation, measured from line ratios of the CO ladder (e.g. Weiss et al. 2007). Another intervening factor is an external dynamical trigger of star formation, such as galaxy interactions or accretion by cold gas. Both effects are expec ...
Lambda-CDM model
The ΛCDM (Lambda cold dark matter) or Lambda-CDM model is a parametrization of the Big Bang cosmological model in which the universe contains a cosmological constant, denoted by Lambda (Greek Λ), associated with dark energy, and cold dark matter (abbreviated CDM). It is frequently referred to as the standard model of Big Bang cosmology, because it is the simplest model that provides a reasonably good account of the following properties of the cosmos: the existence and structure of the cosmic microwave background the large-scale structure in the distribution of galaxies the abundances of hydrogen (including deuterium), helium, and lithium the accelerating expansion of the universe observed in the light from distant galaxies and supernovaeThe model assumes that general relativity is the correct theory of gravity on cosmological scales.It emerged in the late 1990s as a concordance cosmology, after a period of time when disparate observed properties of the universe appeared mutually inconsistent, and there was no consensus on the makeup of the energy density of the universe.The ΛCDM model can be extended by adding cosmological inflation, quintessence and other elements that are current areas of speculation and research in cosmology.Some alternative models challenge the assumptions of the ΛCDM model. Examples of these are modified Newtonian dynamics, modified gravity and theories of large-scale variations in the matter density of the universe.