1. INTRODUCTION 2. MASS AND LIGHT
... 2. The argument of ° 2 fails because the intervening structures happen to be contained within 5¡ of the LMC center (although they must extend over at least the inner D3¡ to account for the observed events). This possibility could only apply to a self-gravitating structure and not to an intrinsically ...
... 2. The argument of ° 2 fails because the intervening structures happen to be contained within 5¡ of the LMC center (although they must extend over at least the inner D3¡ to account for the observed events). This possibility could only apply to a self-gravitating structure and not to an intrinsically ...
Calculations of Gamma Ray Dose from Gamma Ray Bursters and
... Gamma ray bursters (GRB) were first identified over 30 years ago but their origin was unknown until very recently. There is a growing consensus that they are the result of extremely high-energy supernovae events that have been dubbed “GRB” and they can be detected at cosmological distances, but many ...
... Gamma ray bursters (GRB) were first identified over 30 years ago but their origin was unknown until very recently. There is a growing consensus that they are the result of extremely high-energy supernovae events that have been dubbed “GRB” and they can be detected at cosmological distances, but many ...
White dwarf dynamical interactions and fast optical transients
... were employed. Moreover, reliable equations of state, and large numbers of SPH particles (ranging from 4 × 105 to 2 × 106 ) were adopted. Finally, Garcı́a-Senz et al. (2013) studied the head-on collision of two twin white dwarfs of mass 0.7 M , but although they used a very high mass resolution, th ...
... were employed. Moreover, reliable equations of state, and large numbers of SPH particles (ranging from 4 × 105 to 2 × 106 ) were adopted. Finally, Garcı́a-Senz et al. (2013) studied the head-on collision of two twin white dwarfs of mass 0.7 M , but although they used a very high mass resolution, th ...
Dark Matter, EDM and bariogenesis
... Traditional “scattering-off-nuclei” searches for heavy WIMP dark matter particles (χ) have not yet produced a strong positive result. ...
... Traditional “scattering-off-nuclei” searches for heavy WIMP dark matter particles (χ) have not yet produced a strong positive result. ...
Manuscript - Kapteyn Astronomical Institute
... indirectly, lead to significant changes in the characteristics of these galaxies (T. K. Starkenburg et al., in prep). To establish whether observations support that disks of dwarf galaxies are thicker than those of larger systems, we have compiled measurements of the thickness of stellar disks (quan ...
... indirectly, lead to significant changes in the characteristics of these galaxies (T. K. Starkenburg et al., in prep). To establish whether observations support that disks of dwarf galaxies are thicker than those of larger systems, we have compiled measurements of the thickness of stellar disks (quan ...
Investigating Black Hole Kicks
... Abstract It has been known for some time that neutron stars receive kicks (so-called natal kicks) when they are formed in core-collapse supernovae. Whether black holes receive these kicks too is still a matter of debate. We study Galactic low-mass X-ray binaries containing a black hole as the accret ...
... Abstract It has been known for some time that neutron stars receive kicks (so-called natal kicks) when they are formed in core-collapse supernovae. Whether black holes receive these kicks too is still a matter of debate. We study Galactic low-mass X-ray binaries containing a black hole as the accret ...
Metallicity maps
... Ram-pressure stripping can produce considerably more metals than galactic winds (depending on cluster mass and other cluster properties) Schindler et al. 2005, Kapferer et al. 2007, 2009 ...
... Ram-pressure stripping can produce considerably more metals than galactic winds (depending on cluster mass and other cluster properties) Schindler et al. 2005, Kapferer et al. 2007, 2009 ...
Synthetic Stellar Populations Encyclopedia of Astronomy & Astrophysics eaa.iop.org Guy Worthey
... gave rise to the notion of two distinct stellar populations in the Milky Way around 1944 (W Baade is credited with this idea). By the 1960s it became evident that there were several, rather than two, distinct populations. For instance, old but metal-rich stars exist both in the disk and in the bulge ...
... gave rise to the notion of two distinct stellar populations in the Milky Way around 1944 (W Baade is credited with this idea). By the 1960s it became evident that there were several, rather than two, distinct populations. For instance, old but metal-rich stars exist both in the disk and in the bulge ...
All About Elements
... in the universe. Only Hydrogen is more abundant! These two elements were copiously formed during the creation of the universe. In the early stages of the universe, helium and hydrogen nuclei were actually formed. No atoms were formed until about 300,000 years after the Big Bang took place, when the ...
... in the universe. Only Hydrogen is more abundant! These two elements were copiously formed during the creation of the universe. In the early stages of the universe, helium and hydrogen nuclei were actually formed. No atoms were formed until about 300,000 years after the Big Bang took place, when the ...
Chapter 16 Option E: ASTROPHYSICS
... local cluster is another cluster of galaxies, the Virgo cluster, which contains about a thousand galaxies. here are other clusters that can contain as many as ten thousand galaxies. Amazingly, all these diferent clusters are grouped into a socalled “super cluster”. Between these superclusters are va ...
... local cluster is another cluster of galaxies, the Virgo cluster, which contains about a thousand galaxies. here are other clusters that can contain as many as ten thousand galaxies. Amazingly, all these diferent clusters are grouped into a socalled “super cluster”. Between these superclusters are va ...
All About MACHO
... that we still don’t know what is the most common physical substance in the Universe. This mysterious “dark matter” completely dominates the gravity of all systems that have been measured; it controls the motion of the Sun through the Galaxy, the motion of galaxies in clusters of galaxies, and the fo ...
... that we still don’t know what is the most common physical substance in the Universe. This mysterious “dark matter” completely dominates the gravity of all systems that have been measured; it controls the motion of the Sun through the Galaxy, the motion of galaxies in clusters of galaxies, and the fo ...
exemplars and commentary
... Red dwarfs are often covered by starspots, reducing stellar output by as much as 40% for months at a time. At other times, some red dwarfs, called flare stars, can emit gigantic flares, doubling their brightness in minutes. These are the result of the convection currents .Barnard’s star was thought ...
... Red dwarfs are often covered by starspots, reducing stellar output by as much as 40% for months at a time. At other times, some red dwarfs, called flare stars, can emit gigantic flares, doubling their brightness in minutes. These are the result of the convection currents .Barnard’s star was thought ...
The potential of the variable DA white dwarf G117–B15A as
... interacting massive particles. This was recognized early by several authors (see, for instance Raffelt, 1996). There is, however, another important reason for this: white dwarfs are well studied stellar objects since the relative simplicity of the physics governing their evolution at moderately high ...
... interacting massive particles. This was recognized early by several authors (see, for instance Raffelt, 1996). There is, however, another important reason for this: white dwarfs are well studied stellar objects since the relative simplicity of the physics governing their evolution at moderately high ...
Z - STScI
... Late time tail powered by radioactive 56Ni 56Ni explosively created from Si burning after corecollapse Direct probe of the explosion How Is it related to progenitor mass ? ...
... Late time tail powered by radioactive 56Ni 56Ni explosively created from Si burning after corecollapse Direct probe of the explosion How Is it related to progenitor mass ? ...
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.