structure and evolution of white dwarfs and their
... of matter known to 19th and early 20th century physicists. Within a number of years, a handful of stars similar to Sirius B were found, mostly in binaries. The term “white dwarf” was coined later, on the basis of the visual colour and small size, when compared to other stars. The answer to the riddl ...
... of matter known to 19th and early 20th century physicists. Within a number of years, a handful of stars similar to Sirius B were found, mostly in binaries. The term “white dwarf” was coined later, on the basis of the visual colour and small size, when compared to other stars. The answer to the riddl ...
The secular evolution of the Kuiper belt after a close stellar encounter
... Many others studies have attempted to better understand the properties of the KBOs. Gomes (2003) investigated how the outward migration of Neptune, as proposed by (Malhotra 1993, 1995), could have scattered objects from 25 AU onto high-i orbits leading to the current classical Kuiper belt region. He ...
... Many others studies have attempted to better understand the properties of the KBOs. Gomes (2003) investigated how the outward migration of Neptune, as proposed by (Malhotra 1993, 1995), could have scattered objects from 25 AU onto high-i orbits leading to the current classical Kuiper belt region. He ...
Testing the evolution of the DB white dwarf GD 358: first results of a
... a relatively constant C/O ratio near the center, with a size determined by the extent of the helium-burning convective region. Further out the oxygen mass fraction decreases as a result of the ...
... a relatively constant C/O ratio near the center, with a size determined by the extent of the helium-burning convective region. Further out the oxygen mass fraction decreases as a result of the ...
Injection mechanisms of short-lived radionuclides and their
... The competing X-wind model predicts a heterogeneous distribution of 26Al due to its formation by irradiation near the Sun. In this model, the Al–Mg system has no chronological significance. For example, it predicts that CAIs and chondrules formed contemporaneously in spatially distinct regions close ...
... The competing X-wind model predicts a heterogeneous distribution of 26Al due to its formation by irradiation near the Sun. In this model, the Al–Mg system has no chronological significance. For example, it predicts that CAIs and chondrules formed contemporaneously in spatially distinct regions close ...
Accretion of brown dwarfs
... - positive correlation between rotation period and mass - rotational evolution determined by contraction + winds - change of dynamo in very low mass regime 2. Spectroscopic variability: close-up view on accretion behaviour - strong accretion rate variations in stars and brown dwarfs - evidence for a ...
... - positive correlation between rotation period and mass - rotational evolution determined by contraction + winds - change of dynamo in very low mass regime 2. Spectroscopic variability: close-up view on accretion behaviour - strong accretion rate variations in stars and brown dwarfs - evidence for a ...
Downloadable Full Text
... The derivation of Equation (3) involves the assumption that the parameters α and β are constant throughout the mass-transfer phase; this approximation seems justified in light of the other theoretical uncertainties for this phase of the evolution. In order to study the range of possible progenitor s ...
... The derivation of Equation (3) involves the assumption that the parameters α and β are constant throughout the mass-transfer phase; this approximation seems justified in light of the other theoretical uncertainties for this phase of the evolution. In order to study the range of possible progenitor s ...
Neutrinos in an Expanding Universe Paper (IOP)
... expanding in proportion to the size of the Universe. Even though the particles may well be nonrelativistic at the present time, their momentum spectrum is still described by the same relativistic equation (1), albeit that the momenta have been redshifted by 10 orders of magnitude and the temperature ...
... expanding in proportion to the size of the Universe. Even though the particles may well be nonrelativistic at the present time, their momentum spectrum is still described by the same relativistic equation (1), albeit that the momenta have been redshifted by 10 orders of magnitude and the temperature ...
– 1 – 1. Discrete Spectral Lines – DRAFT, INCOMPLETE
... In the statistical theory, consider only the nearest neighbor, at distance d. We need the probability distribution for d, P (d), then take P (d)Cp/dp . This results in a function which is almost a Lorentz profile. ...
... In the statistical theory, consider only the nearest neighbor, at distance d. We need the probability distribution for d, P (d), then take P (d)Cp/dp . This results in a function which is almost a Lorentz profile. ...
Galaxies on Sub-Galactic Scales
... et al. 1999, Diemand et al. 2005). If these subhalos have accumulated sufficient primordial hydrogen gas and turned it into stars like their more massive brethren they should be visible as small Milky Way satellite galaxies today. However, there were only eleven. Taking these numbers from computer s ...
... et al. 1999, Diemand et al. 2005). If these subhalos have accumulated sufficient primordial hydrogen gas and turned it into stars like their more massive brethren they should be visible as small Milky Way satellite galaxies today. However, there were only eleven. Taking these numbers from computer s ...
The solution of the radiative transfer equation in axial symmetry
... star independently. The radiative transfer equation is solved at every plane using a combination of short and long characteristics methods. This allows us to take into account the global character of the radiation field and the necessary computing time is not too long. The velocity field (with veloc ...
... star independently. The radiative transfer equation is solved at every plane using a combination of short and long characteristics methods. This allows us to take into account the global character of the radiation field and the necessary computing time is not too long. The velocity field (with veloc ...
WASP-35b, WASP-48b, AND HAT-P-30b/WASP
... field of view each, on a single fork mount. The cameras scan repeatedly through eight to ten sets of fields each night, taking 30 s exposures. See Pollacco et al. (2006) for more details on the WASP project and the data reduction procedure, and Collier Cameron et al. (2007) and Pollacco et al. (2008 ...
... field of view each, on a single fork mount. The cameras scan repeatedly through eight to ten sets of fields each night, taking 30 s exposures. See Pollacco et al. (2006) for more details on the WASP project and the data reduction procedure, and Collier Cameron et al. (2007) and Pollacco et al. (2008 ...
Number Theory and the Periodicity of Matter
... significance and predictions. The consequences are enormous. It shows why periodicity cannot be fully described by the quantum theory of electrons. The role of protons and neutrons, the other stable sub-atomic particles, are of equal importance. Only by taking the number of all these particles (calle ...
... significance and predictions. The consequences are enormous. It shows why periodicity cannot be fully described by the quantum theory of electrons. The role of protons and neutrons, the other stable sub-atomic particles, are of equal importance. Only by taking the number of all these particles (calle ...
1 H NMR—Number of Signals
... • Most protons absorb between 0-10 ppm. • The terms “upfield” and “downfield” describe the relative location of peaks. Upfield means to the right. Downfield means to the left. • NMR absorptions are measured relative to the position of a reference peak at 0 ppm on the scale due to tetramethylsilane ...
... • Most protons absorb between 0-10 ppm. • The terms “upfield” and “downfield” describe the relative location of peaks. Upfield means to the right. Downfield means to the left. • NMR absorptions are measured relative to the position of a reference peak at 0 ppm on the scale due to tetramethylsilane ...
The white dwarf cooling sequence of 47 Tucanae
... them to attribute its origin to some missing piece of physics in all the existing models at moderate temperatures. The results of our population synthesis simulations for our reference model are also shown, and also include the 1σ statistical deviations (upper and lower red lines). As can be seen, o ...
... them to attribute its origin to some missing piece of physics in all the existing models at moderate temperatures. The results of our population synthesis simulations for our reference model are also shown, and also include the 1σ statistical deviations (upper and lower red lines). As can be seen, o ...
Review Game
... images have been modified from original version. This presentation may not be sold, or redistributed without written permission, and may only be used for non-profit educational use. Using and Distributing this Template You are free to use this template in non-profit educational settings. If you impr ...
... images have been modified from original version. This presentation may not be sold, or redistributed without written permission, and may only be used for non-profit educational use. Using and Distributing this Template You are free to use this template in non-profit educational settings. If you impr ...
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.