High mass-to-light ratios of UCDs
... ❒ Later tidal stripping leaves only the nuclear star cluster behind which becomes a UCD. ❒ Dark matter might therefore be another way to explain the high massto-light ratios of UCDs. =⇒ Since a similar formation scenario is discussed for a few globular clusters as well (e.g. Omega Cen), one would ex ...
... ❒ Later tidal stripping leaves only the nuclear star cluster behind which becomes a UCD. ❒ Dark matter might therefore be another way to explain the high massto-light ratios of UCDs. =⇒ Since a similar formation scenario is discussed for a few globular clusters as well (e.g. Omega Cen), one would ex ...
Document
... „There remains one very much more serious discrepancy, namely, that for hydrogen, helium and oxygen. Here I am convinced that there is something seriously wrong with the present theory. It is clearly impossible that hydrogen should be a million times more abundant than the metals, and I have no dou ...
... „There remains one very much more serious discrepancy, namely, that for hydrogen, helium and oxygen. Here I am convinced that there is something seriously wrong with the present theory. It is clearly impossible that hydrogen should be a million times more abundant than the metals, and I have no dou ...
wk11noQ
... MACHOs for MAssive Compact Halo Objects), these lumps can act as micro gravitational lenses. • Such lenses should cause the occasional apparent brightening of a background star for a brief period (days or months) as the MACHO happens to line up with the background star. • While microlensing events h ...
... MACHOs for MAssive Compact Halo Objects), these lumps can act as micro gravitational lenses. • Such lenses should cause the occasional apparent brightening of a background star for a brief period (days or months) as the MACHO happens to line up with the background star. • While microlensing events h ...
Structure of Neutron Stars
... Remember about the difference between baryonic and gravitational masses in the case of neutron stars! ...
... Remember about the difference between baryonic and gravitational masses in the case of neutron stars! ...
Supermassive black hole activity in local field early
... and Virgo samples; also holds for detections only, as well as for the weighted subsamples Intercept slightly higher for the field sample ...
... and Virgo samples; also holds for detections only, as well as for the weighted subsamples Intercept slightly higher for the field sample ...
The Designed `Just So` Universe Dr. Walter L. Bradley Walter L
... the plaza and then I can use Eq. 1 to determine the initial velocity with which I need to throw the balloon. Just dropping the balloon is also fine; I just set v0 = 0 and solve for the correct time to drop the balloon. The precision with which I must specify the velocity of the thrown balloon depen ...
... the plaza and then I can use Eq. 1 to determine the initial velocity with which I need to throw the balloon. Just dropping the balloon is also fine; I just set v0 = 0 and solve for the correct time to drop the balloon. The precision with which I must specify the velocity of the thrown balloon depen ...
How we found about BLACK HOLES
... A, but it would be quite bright just the same. Since Sirius B is even hotter than our Sun, it should shine at that distance even more brightly than the Sun—yet it does not. Sirius B shines with only 1/400 the brightness that our Sun would show if it was at that the same distance. How is that possibl ...
... A, but it would be quite bright just the same. Since Sirius B is even hotter than our Sun, it should shine at that distance even more brightly than the Sun—yet it does not. Sirius B shines with only 1/400 the brightness that our Sun would show if it was at that the same distance. How is that possibl ...
Physics case for Antares+
... in ”hidden” regions where the particle accelerators could be located. This concerns, first of all, the regions associated with compact objects - black holes, pulsars, the initial epochs of supernovae explosions, etc. The penetrating potential of neutrinos is important not only for extremely dense en ...
... in ”hidden” regions where the particle accelerators could be located. This concerns, first of all, the regions associated with compact objects - black holes, pulsars, the initial epochs of supernovae explosions, etc. The penetrating potential of neutrinos is important not only for extremely dense en ...
PowerPoint
... • These are objects that are below 80 Jupiter masses. • The central density and temperature do not get large enough for nuclear fusion to occur. • These failed stars, gradually cool down and contract. • Recently, there have been a number of discovered brown dwarves. ...
... • These are objects that are below 80 Jupiter masses. • The central density and temperature do not get large enough for nuclear fusion to occur. • These failed stars, gradually cool down and contract. • Recently, there have been a number of discovered brown dwarves. ...
Life (Briefly) Near a Supernova
... story The Star (Clarke, 1959), Arthur C. Clarke described a voyage to a supernova remnant where, against all expectations, a lone surviving distant planet was found. An intelligent race in that solar system, foreseeing the coming cataclysm, had created a vast archive of their civilization for future ...
... story The Star (Clarke, 1959), Arthur C. Clarke described a voyage to a supernova remnant where, against all expectations, a lone surviving distant planet was found. An intelligent race in that solar system, foreseeing the coming cataclysm, had created a vast archive of their civilization for future ...
bildstencifar2010
... Bright Supernovae powered by Magnetars • We don’t need extreme rotation or B to modify the core collapse event • Maximum radiated luminosity is set by rotation, and some expansion losses, to 1052 ergs. • Events as bright as 2005ap and 2008es should be <<10% of all core collapse events, as they requ ...
... Bright Supernovae powered by Magnetars • We don’t need extreme rotation or B to modify the core collapse event • Maximum radiated luminosity is set by rotation, and some expansion losses, to 1052 ergs. • Events as bright as 2005ap and 2008es should be <<10% of all core collapse events, as they requ ...
FOE 2017 Poster Contributions - College of Science | Oregon State
... core-collapse of a massive star or from the thermonuclear detonation of a white dwarf, is a central problem of modern astrophysics. For a handful of SNe, we have been able to identify the progenitor from pre-explosion images (e.g., Gerke et al., 2015; Adams et al., 2016); however, for supernova remn ...
... core-collapse of a massive star or from the thermonuclear detonation of a white dwarf, is a central problem of modern astrophysics. For a handful of SNe, we have been able to identify the progenitor from pre-explosion images (e.g., Gerke et al., 2015; Adams et al., 2016); however, for supernova remn ...
14stardeath
... • Because nothing can move faster than light, a white dwarf cannot be more massive than 1.4MSun, the white dwarf limit (or Chandrasekhar limit). © 2010 Pearson Education, Inc. ...
... • Because nothing can move faster than light, a white dwarf cannot be more massive than 1.4MSun, the white dwarf limit (or Chandrasekhar limit). © 2010 Pearson Education, Inc. ...
chapter3_finalv
... (2) The hydrogen atom is precisely neutral (3) The neutron is precisely neutral - but has a magnetic moment - an internal charge structure - and so a composite object net hydrogen charge is less than 1 x 10-21 e Hydrogen n=4 level ...
... (2) The hydrogen atom is precisely neutral (3) The neutron is precisely neutral - but has a magnetic moment - an internal charge structure - and so a composite object net hydrogen charge is less than 1 x 10-21 e Hydrogen n=4 level ...
Wilderness House Literary Review Volume 8 Number 2
... earth its found in such microscopic quantities it’s called manmade whenever we speak of it. Plutonium has a half life of just 24 thousand years compared to 4 billion years for Uranium 238. Out there, however, it’s made whenever a star explodes and independent fragments of atom nuclei are fuzed toget ...
... earth its found in such microscopic quantities it’s called manmade whenever we speak of it. Plutonium has a half life of just 24 thousand years compared to 4 billion years for Uranium 238. Out there, however, it’s made whenever a star explodes and independent fragments of atom nuclei are fuzed toget ...
Rapid neutral–neutral reactions at low temperatures
... down to low temperatures (Chastaing et al. 1998), it definitely does not react with HCN because of a barrier (Fukuzawa & Osamura 1997). Even in the absence of activation energy, the inverse temperature dependence detected for rapid neutral–neutral reactions is not exactly the same from one system to ...
... down to low temperatures (Chastaing et al. 1998), it definitely does not react with HCN because of a barrier (Fukuzawa & Osamura 1997). Even in the absence of activation energy, the inverse temperature dependence detected for rapid neutral–neutral reactions is not exactly the same from one system to ...
NGC 1808 - Rencontres de Moriond
... NGC 1068 nucleus, contributing to most of the observed UV continuun, the energetics in the other ranges is dominated by the active source: + The contribution to soft X-rays might be non-negligible, but is is any case below 30%. + The contribution to hard X-rays is negligible. + The SSC could produce ...
... NGC 1068 nucleus, contributing to most of the observed UV continuun, the energetics in the other ranges is dominated by the active source: + The contribution to soft X-rays might be non-negligible, but is is any case below 30%. + The contribution to hard X-rays is negligible. + The SSC could produce ...
Most-likely Black Holes
... If BH formation through Case B (in giant stage) is possible, contrary to the observation, we should see about 10 times more BHs in our Galaxy. ...
... If BH formation through Case B (in giant stage) is possible, contrary to the observation, we should see about 10 times more BHs in our Galaxy. ...
Chapter 7 Stellar models and stellar stability
... Stellar models and stellar stability In the previous chapters we have reviewed the most important physical processes taking place in stellar interiors, and we derived the differential equations that determine the structure and evolution of a star. By putting these ingredients together we can constru ...
... Stellar models and stellar stability In the previous chapters we have reviewed the most important physical processes taking place in stellar interiors, and we derived the differential equations that determine the structure and evolution of a star. By putting these ingredients together we can constru ...
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.