here
... - Results : biasing properties up to z=1.5 • Cosmological implication of our results - Test of the Gravitational Instability Paradigm (GIP) ...
... - Results : biasing properties up to z=1.5 • Cosmological implication of our results - Test of the Gravitational Instability Paradigm (GIP) ...
AST1001.ch15
... The highly redshifted spectra of quasars indicate large distances. From brightness and distance, we find that luminosities of some quasars are >1012 LSun! Variability shows that all this energy comes from a region smaller than the solar system. ...
... The highly redshifted spectra of quasars indicate large distances. From brightness and distance, we find that luminosities of some quasars are >1012 LSun! Variability shows that all this energy comes from a region smaller than the solar system. ...
Galaxies
... Dark Matter in the Universe There is evidence for intracluster superhot gas (about 106 K) throughout clusters, densest in the center This head–tail radio galaxy’s lobes are being swept back, probably because of collisions with intracluster gas It is believed this gas is primordial—dating from ...
... Dark Matter in the Universe There is evidence for intracluster superhot gas (about 106 K) throughout clusters, densest in the center This head–tail radio galaxy’s lobes are being swept back, probably because of collisions with intracluster gas It is believed this gas is primordial—dating from ...
presentation source
... near center of the galaxy •Hole grows as dust/gas within galaxy falls into it •If large enough, the Black Hole could swallow entire stars and grow very massive, maybe millions of MO •If galaxy massive enough, or through encounters with other galaxies, could grow even more massive •As galaxy ages, av ...
... near center of the galaxy •Hole grows as dust/gas within galaxy falls into it •If large enough, the Black Hole could swallow entire stars and grow very massive, maybe millions of MO •If galaxy massive enough, or through encounters with other galaxies, could grow even more massive •As galaxy ages, av ...
An analogy
... – distant galaxies are younger than those used to define the Hubble Sequence – more peculiar galaxies are observed: could be due to patchy star formation (younger age) or to interactions being more frequent (denser Universe) – resolution is poor compared to local galaxies and usually limited to a fe ...
... – distant galaxies are younger than those used to define the Hubble Sequence – more peculiar galaxies are observed: could be due to patchy star formation (younger age) or to interactions being more frequent (denser Universe) – resolution is poor compared to local galaxies and usually limited to a fe ...
The Next 2-3 Weeks
... • Used these to calibrate secondary distance indicators in same galaxies. ...
... • Used these to calibrate secondary distance indicators in same galaxies. ...
Determining Distances to Other Galaxies
... • contain little or no gas (only ~1% of mass) • no current star formation • mostly older, redder stars - like those in the halo of our galaxy • Unlike halo stars, metal abundances of these stars are high (about twice solar metallicity) ...
... • contain little or no gas (only ~1% of mass) • no current star formation • mostly older, redder stars - like those in the halo of our galaxy • Unlike halo stars, metal abundances of these stars are high (about twice solar metallicity) ...
The Milky Way Galaxy
... velocities along the line of sight can be determined From these radial velocities, the fact that the Milky Way Galaxy is a spiral structure was determined ...
... velocities along the line of sight can be determined From these radial velocities, the fact that the Milky Way Galaxy is a spiral structure was determined ...
Lecture 15a - Sierra College Astronomy Home Page
... cover-up.) President Truman started the “Majestic 12” secret committee of scientists. The FBIT denies this. – Area 51 is a high-security Air Force installation in Nevada (130 km NW of Las Vegas). Its contents are secret, but may contain alien aircraft and bodies. – In the 1970s, cattle were found in ...
... cover-up.) President Truman started the “Majestic 12” secret committee of scientists. The FBIT denies this. – Area 51 is a high-security Air Force installation in Nevada (130 km NW of Las Vegas). Its contents are secret, but may contain alien aircraft and bodies. – In the 1970s, cattle were found in ...
- EPJ Web of Conferences
... The trend in mean metallicity with system luminosity is also interesting, and full of information. The trend establishes that the present-day system luminosity is correlated tightly with system properties when the stars were forming, and the self-enrichment was being established. That was at very ea ...
... The trend in mean metallicity with system luminosity is also interesting, and full of information. The trend establishes that the present-day system luminosity is correlated tightly with system properties when the stars were forming, and the self-enrichment was being established. That was at very ea ...
Name - Thomas C. Cario Middle School
... Name: _____________________________________ Date: ____________ Per: _____ ...
... Name: _____________________________________ Date: ____________ Per: _____ ...
The formation of the galaxy is believed to be similar
... stars have higher metallicity, which is most likely? Gas ejected from the a) spheroid stars enriched the material now in the disk stars. b) spheroid stars decreased their metallicity. c) spheroid decreased its angular momentum. d) disk stars puffed out the spheroid stars into a rounder shape. ...
... stars have higher metallicity, which is most likely? Gas ejected from the a) spheroid stars enriched the material now in the disk stars. b) spheroid stars decreased their metallicity. c) spheroid decreased its angular momentum. d) disk stars puffed out the spheroid stars into a rounder shape. ...
MS 1512–CB58 - Columbia University Department of Astronomy
... 2. Element Abundances As can be seen from Figure 2, the ambient interstellar medium of cB58 is highly enriched in the elements released by Type II supernovae (SN); O, Mg, Si, P and S all have abundances of ∼ 2/5 solar. Thus, even at this relatively early epoch (corresponding to a look-back time of 8 ...
... 2. Element Abundances As can be seen from Figure 2, the ambient interstellar medium of cB58 is highly enriched in the elements released by Type II supernovae (SN); O, Mg, Si, P and S all have abundances of ∼ 2/5 solar. Thus, even at this relatively early epoch (corresponding to a look-back time of 8 ...
UNIVERSITY OF BRISTOL
... How do the Hertzsprung-Russell diagrams of simple stellar populations (with all their stars formed at the same epoch) vary as the system ages? How is this reflected in the overall photometric properties of the system? (b) A globular cluster has a mass of 106 solar masses and a mass-to-light ratio of ...
... How do the Hertzsprung-Russell diagrams of simple stellar populations (with all their stars formed at the same epoch) vary as the system ages? How is this reflected in the overall photometric properties of the system? (b) A globular cluster has a mass of 106 solar masses and a mass-to-light ratio of ...
Andromeda Galaxy
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The Andromeda Galaxy (/ænˈdrɒmɨdə/), also known as Messier 31, M31, or NGC 224, is a spiral galaxy approximately 780 kiloparsecs (2.5 million light-years) from Earth. It is the nearest major galaxy to the Milky Way and was often referred to as the Great Andromeda Nebula in older texts. It received its name from the area of the sky in which it appears, the constellation of Andromeda, which was named after the mythological princess Andromeda. Being approximately 220,000 light years across, it is the largest galaxy of the Local Group, which also contains the Milky Way, the Triangulum Galaxy, and about 44 other smaller galaxies.The Andromeda Galaxy is the most massive galaxy in the Local Group as well. Despite earlier findings that suggested that the Milky Way contains more dark matter and could be the most massive in the grouping, the 2006 observations by the Spitzer Space Telescope revealed that Andromeda contains one trillion (1012) stars: at least twice the number of stars in the Milky Way, which is estimated to be 200–400 billion.The Andromeda Galaxy is estimated to be 1.5×1012 solar masses, while the mass of the Milky Way is estimated to be 8.5×1011 solar masses. In comparison, a 2009 study estimated that the Milky Way and M31 are about equal in mass, while a 2006 study put the mass of the Milky Way at ~80% of the mass of the Andromeda Galaxy. The Milky Way and Andromeda are expected to collide in 3.75 billion years, eventually merging to form a giant elliptical galaxy or perhaps a large disk galaxy.At 3.4, the apparent magnitude of the Andromeda Galaxy is one of the brightest of any of the Messier objects, making it visible to the naked eye on moonless nights even when viewed from areas with moderate light pollution. Although it appears more than six times as wide as the full Moon when photographed through a larger telescope, only the brighter central region is visible to the naked eye or when viewed using binoculars or a small telescope and would it hence appear to be but another star.