SUB-KILOPARSEC IMAGING OF COOL MOLECULAR GAS IN
... each line derived from short baselines in which the source is unresolved. We separate the two velocity components seen in these and other spectral lines as in Bothwell et al. (2013b). Top center and right panels: Channel maps of CO(1–0) of each of the colored velocity bins in the top left panel. The ...
... each line derived from short baselines in which the source is unresolved. We separate the two velocity components seen in these and other spectral lines as in Bothwell et al. (2013b). Top center and right panels: Channel maps of CO(1–0) of each of the colored velocity bins in the top left panel. The ...
G030020-00 - DCC
... Einstein’s Theory of Gravitation gravitational waves • a necessary consequence of Special Relativity with its finite speed for information transfer • time dependent gravitational fields come from the acceleration of masses and propagate away from their sources as a spacetime warpage at the speed of ...
... Einstein’s Theory of Gravitation gravitational waves • a necessary consequence of Special Relativity with its finite speed for information transfer • time dependent gravitational fields come from the acceleration of masses and propagate away from their sources as a spacetime warpage at the speed of ...
A Zoo of Galaxies - Portsmouth Research Portal
... Figure 2. The first map of the Milky Way showing it as a collection of stars, and based on observational data. (Herschel 1785) ...
... Figure 2. The first map of the Milky Way showing it as a collection of stars, and based on observational data. (Herschel 1785) ...
A Zoo of Galaxies
... Figure 2. The first map of the Milky Way showing it as a collection of stars, and based on observational data. (Herschel 1785) ...
... Figure 2. The first map of the Milky Way showing it as a collection of stars, and based on observational data. (Herschel 1785) ...
Stellar Helium Burning in Other Universes: A
... partial derivatives are to be evaluated at the values realized within our universe. This expression represents the leading order correction and is limited to small changes in the binding energies. In this context, the total binding energy of 8 Be (or twice that of 4 He) is of order 56 MeV, whereas w ...
... partial derivatives are to be evaluated at the values realized within our universe. This expression represents the leading order correction and is limited to small changes in the binding energies. In this context, the total binding energy of 8 Be (or twice that of 4 He) is of order 56 MeV, whereas w ...
The Celestial Origin of Atoms
... lithium-7, the stars for carbon to uranium, and cosmic rays for lithium, beryllium and boron. By the 1990s, nuclear astrophysics was no longer suspended in theoretical limbo. It had ceased to be a purely speculative discipline and was becoming a science in its own right, with its own quantitative an ...
... lithium-7, the stars for carbon to uranium, and cosmic rays for lithium, beryllium and boron. By the 1990s, nuclear astrophysics was no longer suspended in theoretical limbo. It had ceased to be a purely speculative discipline and was becoming a science in its own right, with its own quantitative an ...
The Cosmos & the Bible
... • Most cosmologists are working with varieties of this today, at least to the extent that our universe is finite in size and began with the big bang. • Many are apparently hoping that our universe is just a subset of an infinite, eternal universe, of which ours is just a transient bubble, but it is ...
... • Most cosmologists are working with varieties of this today, at least to the extent that our universe is finite in size and began with the big bang. • Many are apparently hoping that our universe is just a subset of an infinite, eternal universe, of which ours is just a transient bubble, but it is ...
Stellar populations in the nuclear regions of nearby radio galaxies
... range in the blue and covers the l3810–5420 A red arm, at 2.6- and 1.7-Å resolution respectively. Just one radio galaxy (DA 240) was observed with this alternative setup. The dichroics 5700 and 6100 were used in 1997 November and 1998 February, and in both runs we used a filter to avoid second-or ...
... range in the blue and covers the l3810–5420 A red arm, at 2.6- and 1.7-Å resolution respectively. Just one radio galaxy (DA 240) was observed with this alternative setup. The dichroics 5700 and 6100 were used in 1997 November and 1998 February, and in both runs we used a filter to avoid second-or ...
Neutrinos and Supernovae
... That confirmation was a climactic ter are just that—weak. Under typical off the enormous amount of energy moment in a long history of supernovae conditions, a neutrino is observations. For centuries, 100 billion billion (1020) mankind has been fascinattimes less likely than light to ed by the sudden ...
... That confirmation was a climactic ter are just that—weak. Under typical off the enormous amount of energy moment in a long history of supernovae conditions, a neutrino is observations. For centuries, 100 billion billion (1020) mankind has been fascinattimes less likely than light to ed by the sudden ...
Galaxy Sorting
... In 1924, astronomer Edwin Hubble proved that galaxies are very distant "island universes" each one a collection of millions or billions of stars bound together by gravity. Within a few years, he had set up a system to classify them that is still used today, albeit with some modifications and a ...
... In 1924, astronomer Edwin Hubble proved that galaxies are very distant "island universes" each one a collection of millions or billions of stars bound together by gravity. Within a few years, he had set up a system to classify them that is still used today, albeit with some modifications and a ...
Bez nadpisu
... are different because we view the region where the stream and the outer parts of the disk interact from different angles. On the other hand, the depths of the minima are different because the “nose” of the red star, which is turned toward the white dwarf, is heated by radiation from the disk. After ...
... are different because we view the region where the stream and the outer parts of the disk interact from different angles. On the other hand, the depths of the minima are different because the “nose” of the red star, which is turned toward the white dwarf, is heated by radiation from the disk. After ...
arXiv:1502.03605v2 [astro-ph.EP] 24 Apr 2015
... For case B, prior bounds on Fe/Si} and Mg/Si} are derived from Fe/Si and Mg/Si inferred from the host star’s photospheric abundance: (1) Since all Si and Mg is assumed to be in the mantle, Mg/Si defines the prior bounds on Mg/Si} ; (2) Fe, on the other hand, is distributed between core and mantle ...
... For case B, prior bounds on Fe/Si} and Mg/Si} are derived from Fe/Si and Mg/Si inferred from the host star’s photospheric abundance: (1) Since all Si and Mg is assumed to be in the mantle, Mg/Si defines the prior bounds on Mg/Si} ; (2) Fe, on the other hand, is distributed between core and mantle ...
from z=0 to z=1
... 5. The z~0 counterparts of LBGs are a population of compact luminous UV galaxies (UVLG). In terms of Ltot (SFR), UVLGs are more than 10 times fainter than ULIRGs. 6. LBGs and SCUBA galaxies (UV and IR selected galaxies at z~3) do not overlap with each other very much. SCUBA galaxies have significant ...
... 5. The z~0 counterparts of LBGs are a population of compact luminous UV galaxies (UVLG). In terms of Ltot (SFR), UVLGs are more than 10 times fainter than ULIRGs. 6. LBGs and SCUBA galaxies (UV and IR selected galaxies at z~3) do not overlap with each other very much. SCUBA galaxies have significant ...
Clusters as laboratories for the study of galaxy evolution
... “The difference in the degree of evolution between our field sample and published cluster galaxies suggests a more recent formation epoch, around z=1.5 for field galaxies compared to z>2.0 for cluster galaxies. The magnitude difference implies that the field early-type galaxies are about 2 Gyr young ...
... “The difference in the degree of evolution between our field sample and published cluster galaxies suggests a more recent formation epoch, around z=1.5 for field galaxies compared to z>2.0 for cluster galaxies. The magnitude difference implies that the field early-type galaxies are about 2 Gyr young ...
Galaxies
... The radiation from these galaxies is called nonstellar radiation Many luminous galaxies are experiencing an outburst of star formation, probably due to interactions with a neighbor These galaxies are called starburst galaxies, and we will discuss them later The galaxies we will discuss now are those ...
... The radiation from these galaxies is called nonstellar radiation Many luminous galaxies are experiencing an outburst of star formation, probably due to interactions with a neighbor These galaxies are called starburst galaxies, and we will discuss them later The galaxies we will discuss now are those ...
Article PDF - IOPscience
... and its two-dimensional shape. The correlation between the sizes and masses of galaxies suggests that to first order the size of a galaxy is an important clue for understanding origins. Sizes, however, depend upon knowledge of the distances to galaxies, something that is often not know. The importanc ...
... and its two-dimensional shape. The correlation between the sizes and masses of galaxies suggests that to first order the size of a galaxy is an important clue for understanding origins. Sizes, however, depend upon knowledge of the distances to galaxies, something that is often not know. The importanc ...
Astronomical Picture of the Day
... galaxies Abell 1185. There at least two galaxies, cataloged as Arp 105 and dubbed The Guitar for their familiar appearance, are pulling each other apart gravitationally. Most of Abell 1185's hundreds of galaxies are elliptical galaxies, although spiral, lenticular, and irregular galaxies are all cle ...
... galaxies Abell 1185. There at least two galaxies, cataloged as Arp 105 and dubbed The Guitar for their familiar appearance, are pulling each other apart gravitationally. Most of Abell 1185's hundreds of galaxies are elliptical galaxies, although spiral, lenticular, and irregular galaxies are all cle ...
8-4.9 - S2TEM Centers SC
... 2. Ask them to share what they know about it. 3. Make sure they are aware that a galaxy is a very large collection of stars, dust, and gas held together by the force of gravity. They should also be aware that not all galaxies look the same. 4. Provide students with copies of the activity sheet and t ...
... 2. Ask them to share what they know about it. 3. Make sure they are aware that a galaxy is a very large collection of stars, dust, and gas held together by the force of gravity. They should also be aware that not all galaxies look the same. 4. Provide students with copies of the activity sheet and t ...
Astronomy and Astrophysics (ASTRO)
... Quasars. Cosmology, the Big Bang and the future of the universe. Prospects and searches for extraterrestrial life. ...
... Quasars. Cosmology, the Big Bang and the future of the universe. Prospects and searches for extraterrestrial life. ...
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.