Pickup protons at quasi-perpendicular shocks: full - HAL-Insu
... fraction of pickup ions decreases with increasing mass. This is at variance with the conclusion drawn from ACR observations in the outer heliosphere: the injection efficiency for ACRs seems to be higher for higher mass pickup ions (Cummings and Stone, 1996). To circumvent this problem Zank et al. (2 ...
... fraction of pickup ions decreases with increasing mass. This is at variance with the conclusion drawn from ACR observations in the outer heliosphere: the injection efficiency for ACRs seems to be higher for higher mass pickup ions (Cummings and Stone, 1996). To circumvent this problem Zank et al. (2 ...
When is star formation episodic? A delay differential equation
... massive stars, that for gas pushed into the halo to return and interact with the disk and that for spiral density wave evolution, respectively. ...
... massive stars, that for gas pushed into the halo to return and interact with the disk and that for spiral density wave evolution, respectively. ...
Cosmic Radiation
... the nucleus to gain entry. Neutrons on the other hand do not experience any repulsion from positively charged nuclei. Also neutrons can change into protons while inside the nucleus thus allowing one element to change into another element (the dream of the alchemists). In the beginning of the Univers ...
... the nucleus to gain entry. Neutrons on the other hand do not experience any repulsion from positively charged nuclei. Also neutrons can change into protons while inside the nucleus thus allowing one element to change into another element (the dream of the alchemists). In the beginning of the Univers ...
"Seeing" Dark Matter
... the theory of nucleosynthesis—the original production of atomic nuclei—in the Big Bang. According to this theory, the Big Bang initially created all ordinary matter in the form of hydrogen. For a brief period—only a few minutes long—while the universe was still small, the density of matter was high ...
... the theory of nucleosynthesis—the original production of atomic nuclei—in the Big Bang. According to this theory, the Big Bang initially created all ordinary matter in the form of hydrogen. For a brief period—only a few minutes long—while the universe was still small, the density of matter was high ...
HMM词性标注
... rate is a maximum possible accretion rate for mass M. This critical rate can easily be exceeded with the models that are not spherically symmetric, such as mass accretion occurs in a disk. （accrete ionized hydrogen gas） The major problem with fuelling a quasar by gravitational accretion is not the e ...
... rate is a maximum possible accretion rate for mass M. This critical rate can easily be exceeded with the models that are not spherically symmetric, such as mass accretion occurs in a disk. （accrete ionized hydrogen gas） The major problem with fuelling a quasar by gravitational accretion is not the e ...
Radioactive Decay
... Fermi Theory of β Decay The theory to explain β Decay should include the following information : 1) The electron and the neutrino do not preexist in the nucleus 2) The electron and the neutrino are relativistic. 3) The continuous distribution of electron energies Enrico Fermi proposed, in 1934, a th ...
... Fermi Theory of β Decay The theory to explain β Decay should include the following information : 1) The electron and the neutrino do not preexist in the nucleus 2) The electron and the neutrino are relativistic. 3) The continuous distribution of electron energies Enrico Fermi proposed, in 1934, a th ...
Element Segregation in Low Metallicity Stars and the Primordial
... gas-mixture cannot be in complete equilibrium and remain chemically homogeneous. During ...
... gas-mixture cannot be in complete equilibrium and remain chemically homogeneous. During ...
Stellar Structure and Evolution
... stellar evolution. However, there is another side to the importance of stellar evolution calculations, to which we return in section 1.4: the calculations depend on knowledge of the physical properties of the matter in the stars; hence by testing the computed models against observations we are effec ...
... stellar evolution. However, there is another side to the importance of stellar evolution calculations, to which we return in section 1.4: the calculations depend on knowledge of the physical properties of the matter in the stars; hence by testing the computed models against observations we are effec ...
Stellar Evolution - Astrophysics
... a star’s evolutionary state, the mass-loss rate is another critical parameter in the case of massive, binary and giant stars. The neutrino flux where it can be observed, as in the case of the Sun, gives vital information about conditions in the stellar core. Further insight into the internal structu ...
... a star’s evolutionary state, the mass-loss rate is another critical parameter in the case of massive, binary and giant stars. The neutrino flux where it can be observed, as in the case of the Sun, gives vital information about conditions in the stellar core. Further insight into the internal structu ...
On superconductivity of matter at hight density and the
... from one another. But in the crystalline solid, in many cases it is, as performed by Pasteur. To date no such easy experiment has been performed which has allowed one to separate chiral nuclei or nucleons. Note that the chiral objects of Pasteur had lifetimes and interactions with each other and the ...
... from one another. But in the crystalline solid, in many cases it is, as performed by Pasteur. To date no such easy experiment has been performed which has allowed one to separate chiral nuclei or nucleons. Note that the chiral objects of Pasteur had lifetimes and interactions with each other and the ...
Chemical analysis of 24 dusty (pre-) main
... Non-LTE effects have not been taken into account. We have computed abundances with both programs for the stars with effective temperatures in the range from 7500K and 9500K, and found good agreement. The stellar parameters were refined – when necessary and/or possible– in the usual way: the effectiv ...
... Non-LTE effects have not been taken into account. We have computed abundances with both programs for the stars with effective temperatures in the range from 7500K and 9500K, and found good agreement. The stellar parameters were refined – when necessary and/or possible– in the usual way: the effectiv ...
Lecture 2: The Chemical Shift
... resonances. This means that one must either find a solvent in which the degree of overlap is acceptable, or work with a composite data collected from a variety of solvents. In the spectra above, it seems the protons moved upfield. In general, aromatic, dish-like solvents like benzene move shifts upf ...
... resonances. This means that one must either find a solvent in which the degree of overlap is acceptable, or work with a composite data collected from a variety of solvents. In the spectra above, it seems the protons moved upfield. In general, aromatic, dish-like solvents like benzene move shifts upf ...
Radio emissions from terrestrial planets around white dwarfs
... a combination of bow shock and tidal drag forces. (iv) For systems which evolve to a white-dwarf/terrestrial-planet system, the planet’s orbit will decay further due to electrical dissipation in the unipolar inductor system (Li et al. 1998), as discussed in the previous section. It is thus conceivab ...
... a combination of bow shock and tidal drag forces. (iv) For systems which evolve to a white-dwarf/terrestrial-planet system, the planet’s orbit will decay further due to electrical dissipation in the unipolar inductor system (Li et al. 1998), as discussed in the previous section. It is thus conceivab ...
Indroduction
... emission has a minimum level in M32 and reaches intensities which are almost an order of magnitude higher in other galaxies such as NGC 4486 and NGC 4649 (Code & Welch, 1979 Bertola et al., 1980 Bertola et al., 1982 Burstein et al., 1988), ranging from 2.05{4.50 mag. The source of this emission s ...
... emission has a minimum level in M32 and reaches intensities which are almost an order of magnitude higher in other galaxies such as NGC 4486 and NGC 4649 (Code & Welch, 1979 Bertola et al., 1980 Bertola et al., 1982 Burstein et al., 1988), ranging from 2.05{4.50 mag. The source of this emission s ...
WHITE DWARFS AS A SOURCE OF CONSTRAINTS ON EXOTIC …
... theories in understanding stellar structure and evolution Stars serves as a source of constraints on non standard ideas Some of these constraints turn out to be more stringent than laboratory ones First idea: weakly interacting particles (axions, Kaluza-Klein gravitons, etc.) produced in hot and ...
... theories in understanding stellar structure and evolution Stars serves as a source of constraints on non standard ideas Some of these constraints turn out to be more stringent than laboratory ones First idea: weakly interacting particles (axions, Kaluza-Klein gravitons, etc.) produced in hot and ...
Reconciling Dwarf Galaxies with LCDM Cosmology Andrew Wetzel F RE
... higher (e.g. if Vet were underestima 1/2al Garrison-Kimmel et vanish al 2014 (cyan lines) would but the nu and black lines) would remain unch Fig. 4 summarizes the results of complete set of 48 hosts, where eac “too3. big fail” problem: dark-matter in CDM assumed density profile are shape. Bl Figure ...
... higher (e.g. if Vet were underestima 1/2al Garrison-Kimmel et vanish al 2014 (cyan lines) would but the nu and black lines) would remain unch Fig. 4 summarizes the results of complete set of 48 hosts, where eac “too3. big fail” problem: dark-matter in CDM assumed density profile are shape. Bl Figure ...
The cosmic origin of fluorine and sulphur
... being formed, in different processes in different types of stars. is means that all atoms, except hydrogen and helium, that build up all things, plants, animals, and humans in our surroundings have been formed in stars. When stars have formed new elements, these can either be locked up inside the sta ...
... being formed, in different processes in different types of stars. is means that all atoms, except hydrogen and helium, that build up all things, plants, animals, and humans in our surroundings have been formed in stars. When stars have formed new elements, these can either be locked up inside the sta ...
Reconstructing the evolution of double helium white dwarfs
... Key words: stars: white dwarfs – stars: mass loss – binaries: close – stars: evolution ...
... Key words: stars: white dwarfs – stars: mass loss – binaries: close – stars: evolution ...
Magnetic fields generated by r-modes in accreting quark stars
... instability, the toroidal component of the field produces a new poloidal component as a result of its decay, which can then be wound up itself, closing the dynamo loop. When the differential rotation stops, the field can evolve into a stable configuration of a mixed poloidal-toroidal twisted-torus sh ...
... instability, the toroidal component of the field produces a new poloidal component as a result of its decay, which can then be wound up itself, closing the dynamo loop. When the differential rotation stops, the field can evolve into a stable configuration of a mixed poloidal-toroidal twisted-torus sh ...
P-nuclei
p-Nuclei (p stands for proton-rich) are certain proton-rich, naturally occurring isotopes of some elements between selenium and mercury which cannot be produced in either s- or r-process.