the capture of magnetic inelastic dark matter in the sun.
... energy is equal to one half of the total potential energy (hT i = 12 hU i). If one assumes that the only interaction present is the gravity, the virial theorem becomes a relation between average velocity and mass. In this way, Zwicky calculated that the total mass of the cluster was Mcluster ≈ 4.5 × ...
... energy is equal to one half of the total potential energy (hT i = 12 hU i). If one assumes that the only interaction present is the gravity, the virial theorem becomes a relation between average velocity and mass. In this way, Zwicky calculated that the total mass of the cluster was Mcluster ≈ 4.5 × ...
On the origin of lopsidedness in galaxies as determined
... studies of disk asymmetries face. First, one wants to measure the asymmetry in the underlying stellar mass, not light. This desire tends to push the studies to redder bandpasses to avoid the strong influence of recent star formation episodes. However, as noted since the early near-IR studies (for ex ...
... studies of disk asymmetries face. First, one wants to measure the asymmetry in the underlying stellar mass, not light. This desire tends to push the studies to redder bandpasses to avoid the strong influence of recent star formation episodes. However, as noted since the early near-IR studies (for ex ...
Course Outline - Tony Bacigalupo
... The clusters’ three-dimensional distribution in space is roughly spherical, with a 30 kpc diameter ...
... The clusters’ three-dimensional distribution in space is roughly spherical, with a 30 kpc diameter ...
The formation of disc galaxies in high-resolution moving
... Recently, some authors suggested that a high star formation threshold is a key factor in allowing the successful formation of a late-type spiral galaxy like the Milky Way (Guedes et al. 2011). On the other hand, Agertz et al. (2011) find that a low star formation efficiency, particularly at high red ...
... Recently, some authors suggested that a high star formation threshold is a key factor in allowing the successful formation of a late-type spiral galaxy like the Milky Way (Guedes et al. 2011). On the other hand, Agertz et al. (2011) find that a low star formation efficiency, particularly at high red ...
The Strikingly Uniform, Highly Turbulent Interstellar Medium of the
... ionized gas in the most luminous Hot DOGs, we were awarded 8.1h in bands 7 and 8 to study the red-shifted 157.7µm (2 P3/2 → 2 P1/2 ) fine-structure transition of ionized carbon, [C ii], and the underlying dust continuum emission in a sample of Hot DOGs spanning a range of redshifts and luminosities. ...
... ionized gas in the most luminous Hot DOGs, we were awarded 8.1h in bands 7 and 8 to study the red-shifted 157.7µm (2 P3/2 → 2 P1/2 ) fine-structure transition of ionized carbon, [C ii], and the underlying dust continuum emission in a sample of Hot DOGs spanning a range of redshifts and luminosities. ...
Little Higgs dark matter and its collider signals
... LHC: Abut 10% accuracy (Model-dependent analysis) ILC(500): Better than 10% accuracy (Model-independent analysis) ILC(1000): 2% accuracy!! (Model-independent analysis) ...
... LHC: Abut 10% accuracy (Model-dependent analysis) ILC(500): Better than 10% accuracy (Model-independent analysis) ILC(1000): 2% accuracy!! (Model-independent analysis) ...
sections 23-25 powerpoint
... Elliptical galaxy (E). A spheroidal galaxy containing millions to billions of old low-mass stars and no gas or dust. Spiral Galaxy (S). A galaxy with a spheroidal bulge of several million old low-mass stars and a flattened pancake-like disk of billions of old low-mass and young high-mass stars, alon ...
... Elliptical galaxy (E). A spheroidal galaxy containing millions to billions of old low-mass stars and no gas or dust. Spiral Galaxy (S). A galaxy with a spheroidal bulge of several million old low-mass stars and a flattened pancake-like disk of billions of old low-mass and young high-mass stars, alon ...
Zinc and chromium abundances in a third
... indicated. The former appears to be an extended object of low surface brightness and low metallicity ([Zn/H] = −1.21), consistent with the reduced star formation efficiencies typical of such galaxies (McGaugh 1994). The latter also has a relatively low abundance, [Zn/H] = −0.85, and a rest frame B-b ...
... indicated. The former appears to be an extended object of low surface brightness and low metallicity ([Zn/H] = −1.21), consistent with the reduced star formation efficiencies typical of such galaxies (McGaugh 1994). The latter also has a relatively low abundance, [Zn/H] = −0.85, and a rest frame B-b ...
Building` a Galaxy SED
... growth of structure in our Universe in linear + non-linear regimes (spherical collapse) Gaussian random fields, Press-Schechter theory, dark matter halo mass functions baryonic physics of galaxy formation (gas accretion, cooling, feedback processes) formation & evolution of supermassive black holes ...
... growth of structure in our Universe in linear + non-linear regimes (spherical collapse) Gaussian random fields, Press-Schechter theory, dark matter halo mass functions baryonic physics of galaxy formation (gas accretion, cooling, feedback processes) formation & evolution of supermassive black holes ...
In Pursuit of the Least Luminous Galaxies
... the most direct measurement of the mass spectrum, spatial distribution, and clustering scale of dark matter. What was initially viewed as a problem now provides an opportunity to simultaneously learn about dark matter and galaxy formation physics. Many studies have invoked simple models of galaxy fo ...
... the most direct measurement of the mass spectrum, spatial distribution, and clustering scale of dark matter. What was initially viewed as a problem now provides an opportunity to simultaneously learn about dark matter and galaxy formation physics. Many studies have invoked simple models of galaxy fo ...
Dark matter
Dark matter is a hypothetical kind of matter that cannot be seen with telescopes but would account for most of the matter in the universe. The existence and properties of dark matter are inferred from its gravitational effects on visible matter, on radiation, and on the large-scale structure of the universe. Dark matter has not been detected directly, making it one of the greatest mysteries in modern astrophysics.Dark matter neither emits nor absorbs light or any other electromagnetic radiation at any significant level. According to the Planck mission team, and based on the standard model of cosmology, the total mass–energy of the known universe contains 4.9% ordinary matter, 26.8% dark matter and 68.3% dark energy. Thus, dark matter is estimated to constitute 84.5% of the total matter in the universe, while dark energy plus dark matter constitute 95.1% of the total mass–energy content of the universe.Astrophysicists hypothesized the existence of dark matter to account for discrepancies between the mass of large astronomical objects determined from their gravitational effects, and their mass as calculated from the observable matter (stars, gas, and dust) that they can be seen to contain. Their gravitational effects suggest that their masses are much greater than the observable matter survey suggests. Dark matter was postulated by Jan Oort in 1932, albeit based upon insufficient evidence, to account for the orbital velocities of stars in the Milky Way. In 1933, Fritz Zwicky was the first to use the virial theorem to infer the existence of unseen matter, which he referred to as dunkle Materie 'dark matter'. More robust evidence from galaxy rotation curves was discovered by Horace W. Babcock in 1939, but was not attributed to dark matter. The first hypothesis to postulate ""dark matter"" based upon robust evidence was formulated by Vera Rubin and Kent Ford in the 1960s–1970s, using galaxy rotation curves. Subsequently, many other observations have indicated the presence of dark matter in the universe, including gravitational lensing of background objects by galaxy clusters such as the Bullet Cluster, the temperature distribution of hot gas in galaxies and clusters of galaxies and, more recently, the pattern of anisotropies in the cosmic microwave background. According to consensus among cosmologists, dark matter is composed primarily of a not yet characterized type of subatomic particle.The search for this particle, by a variety of means, is one of the major efforts in particle physics today.Although the existence of dark matter is generally accepted by the mainstream scientific community, some alternative theories of gravity have been proposed, such as MOND and TeVeS, which try to account for the anomalous observations without requiring additional matter. However, these theories cannot account for the properties of galaxy clusters.