The quick brown fox jumps over the lazy dog
... impending event. Initially unconcern - why should I worry about some fireworks near Neptune. Slowly, two suns in the sky forces it to be noticed. Then heat, earthquakes, tidal waves, impossible weather - panic. Story ends on a sobering note that will resonate in some Ray Bradbury stories later: 'The ...
... impending event. Initially unconcern - why should I worry about some fireworks near Neptune. Slowly, two suns in the sky forces it to be noticed. Then heat, earthquakes, tidal waves, impossible weather - panic. Story ends on a sobering note that will resonate in some Ray Bradbury stories later: 'The ...
ppt - 2006 Mitchell Symposium
... Proto-neutron star will radiate binding energy in neutrinos, contract, spin up. de-leptonization ~ 1 s; less than time for blast wave to propagate out of C/O, He core. De-leptonization does not occur in the vacuum of space, but takes place within the matter-filled environment in the center of the s ...
... Proto-neutron star will radiate binding energy in neutrinos, contract, spin up. de-leptonization ~ 1 s; less than time for blast wave to propagate out of C/O, He core. De-leptonization does not occur in the vacuum of space, but takes place within the matter-filled environment in the center of the s ...
SUB-KILOPARSEC IMAGING OF COOL MOLECULAR GAS IN
... evidence that the clumps are offset towards higher star formation efficiency compared to the galaxy as a whole. Bright lensed galaxies are rare, but recent large surveys conducted by the South Pole Telsecope (SPT; Carlstrom et al. 2011; Vieira et al. 2010; Mocanu et al. 2013) and Herschel (Negrello ...
... evidence that the clumps are offset towards higher star formation efficiency compared to the galaxy as a whole. Bright lensed galaxies are rare, but recent large surveys conducted by the South Pole Telsecope (SPT; Carlstrom et al. 2011; Vieira et al. 2010; Mocanu et al. 2013) and Herschel (Negrello ...
Review: How does a star`s mass determine its life story?
... – It is a ball of neutrons left over from a massive star supernova and supported by neutron degeneracy pressure. ...
... – It is a ball of neutrons left over from a massive star supernova and supported by neutron degeneracy pressure. ...
The Lagoon Nebula and its Vicinity
... away, associated with the young (1–3 Myr) open cluster NGC 6530, which contains several O stars and several dozen B stars. Lower-mass cluster members, detected by X-ray and Hα emission, and by near-IR excess, number more than a thousand. Myr-old star formation is traced by the optically-visible H II ...
... away, associated with the young (1–3 Myr) open cluster NGC 6530, which contains several O stars and several dozen B stars. Lower-mass cluster members, detected by X-ray and Hα emission, and by near-IR excess, number more than a thousand. Myr-old star formation is traced by the optically-visible H II ...
Study of variation of gravitational constant (G) in very strong
... Tomasz Borowski: “The new theory of gravitation representing the movement of planets.” International Letters of Chemistry, Physics and Astronomy 1 (2012) 1-5. ...
... Tomasz Borowski: “The new theory of gravitation representing the movement of planets.” International Letters of Chemistry, Physics and Astronomy 1 (2012) 1-5. ...
Type II Supernovae
... Evidence exists that 60 Ni/58 Ni ratios in primitive meteorites are lower than samples from Earth, Mars and the chondrite parent bodies. ...
... Evidence exists that 60 Ni/58 Ni ratios in primitive meteorites are lower than samples from Earth, Mars and the chondrite parent bodies. ...
Astronomy Astrophysics - Utrecht University Repository
... over the 5 years of observations. The size of the symbols corresponds to the RE -band amplitude of variability during the period of EROS II observations. The figure shows that the stars are distributed on an increasingly wider range of ∆R with increasing near-IR excess. This suggests that the maximu ...
... over the 5 years of observations. The size of the symbols corresponds to the RE -band amplitude of variability during the period of EROS II observations. The figure shows that the stars are distributed on an increasingly wider range of ∆R with increasing near-IR excess. This suggests that the maximu ...
Searching for RR Lyrae Stars in M15
... pulsate radially with short periods. They were first discovered in nearby globular clusters about a 120 years ago. Today, around 1,500 RR Lyrae stars have been found in globular clusters (GCs) and around 6,000 isolated stars are known to be RR Lyrae [5]. They pulsate in radius and luminosity over sh ...
... pulsate radially with short periods. They were first discovered in nearby globular clusters about a 120 years ago. Today, around 1,500 RR Lyrae stars have been found in globular clusters (GCs) and around 6,000 isolated stars are known to be RR Lyrae [5]. They pulsate in radius and luminosity over sh ...
The Parallax Activity: Measuring the Distances to
... of less than 10% using ground-based measurements. Other techniques must be used (see Extension Activity D) beyond 200 light years. 4. The Hipparcos satellite (1989-93) measured the positions of stars with great accuracy, since it was above the fluctuat- ing ...
... of less than 10% using ground-based measurements. Other techniques must be used (see Extension Activity D) beyond 200 light years. 4. The Hipparcos satellite (1989-93) measured the positions of stars with great accuracy, since it was above the fluctuat- ing ...
Stellar-Mass Black Holes and Ultraluminous X
... or neutron degeneracy pressure (which would otherwise result in a white dwarf, or neutron star, respectively). Within the framework of classical general relativity (GR), the core collapses to a singularity that is cloaked in an event horizon before it can be viewed. Like a giant elementary particle, ...
... or neutron degeneracy pressure (which would otherwise result in a white dwarf, or neutron star, respectively). Within the framework of classical general relativity (GR), the core collapses to a singularity that is cloaked in an event horizon before it can be viewed. Like a giant elementary particle, ...
Interacting Binary Star System Activity
... transferred from the late-type star to the white dwarf. Unless the white dwarf has an extremely strong magnetic field, the transferred mass forms an accretion disk around the white dwarf. Because of the instabilities caused by the white dwarf pulling mass off of the late-type star, eruptions can occ ...
... transferred from the late-type star to the white dwarf. Unless the white dwarf has an extremely strong magnetic field, the transferred mass forms an accretion disk around the white dwarf. Because of the instabilities caused by the white dwarf pulling mass off of the late-type star, eruptions can occ ...
Outlook: Disk structure models
... - comparison with observations by scanning through the disk with e.g. VISIR, IRAM, ALMA in the NIR to submm feedback for the models - evaporation of the inner disk as a function of spectral-type of central star ...
... - comparison with observations by scanning through the disk with e.g. VISIR, IRAM, ALMA in the NIR to submm feedback for the models - evaporation of the inner disk as a function of spectral-type of central star ...
T Einstein’s Mirage Paul L. Schechter
... to be a close pair of virtually identical quasars was observed. Quasars are very bright distant sources, so light from them sometimes passes near galaxies on its way to us. The suspicion that they were the multiple images of a single quasar expected for a gravitational mirage was confirmed Perhaps t ...
... to be a close pair of virtually identical quasars was observed. Quasars are very bright distant sources, so light from them sometimes passes near galaxies on its way to us. The suspicion that they were the multiple images of a single quasar expected for a gravitational mirage was confirmed Perhaps t ...
Evolution of the barium abundance in the early Galaxy from a NLTE
... in the line frequencies Jν exceeds the Planck intensity Bν , then an enhanced photoexcitation depopulates the lower atomic levels and overpopulates the upper ones (this “pumping” is described e.g. in Bruls et al. 1992, or Asplund 2005). The depth of the effective formation of the radiation in b-b tra ...
... in the line frequencies Jν exceeds the Planck intensity Bν , then an enhanced photoexcitation depopulates the lower atomic levels and overpopulates the upper ones (this “pumping” is described e.g. in Bruls et al. 1992, or Asplund 2005). The depth of the effective formation of the radiation in b-b tra ...
ppt
... particles: electron and positron; these particles in some way, the combination of two particles with opposite charge may result in the electric neutralization from a certain distance, like atom, ...
... particles: electron and positron; these particles in some way, the combination of two particles with opposite charge may result in the electric neutralization from a certain distance, like atom, ...
Shockingly Bright Pulsar - Astronomical Society of the Pacific
... The Big Picture The chart illustrates the relative masses of super-dense cosmic objects, from white dwarf stars to supermassive black holes inhabiting the cores of most galaxies. Credit: NASA/JPLCaltech/SAO. ...
... The Big Picture The chart illustrates the relative masses of super-dense cosmic objects, from white dwarf stars to supermassive black holes inhabiting the cores of most galaxies. Credit: NASA/JPLCaltech/SAO. ...
Clouds in the atmospheres of extrasolar planets
... Earth-like planets orbiting different types of stars. Clouds have an important influence on such planetary emission spectra due to their wavelength dependent absorption and scattering properties. We also investigate the influence of clouds on the ability to derive information about planetary surface ...
... Earth-like planets orbiting different types of stars. Clouds have an important influence on such planetary emission spectra due to their wavelength dependent absorption and scattering properties. We also investigate the influence of clouds on the ability to derive information about planetary surface ...
The evolution of Red Supergiants to supernova in the LMC cluster
... better determination of RSG mass-loss rates to improve the stellar modeling at this evolved stage of the star’s life. In addition to the effect on RSG evolution, it has ...
... better determination of RSG mass-loss rates to improve the stellar modeling at this evolved stage of the star’s life. In addition to the effect on RSG evolution, it has ...
Star formation
Star formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as ""stellar nurseries"" or ""star-forming regions"", collapse to form stars. As a branch of astronomy, star formation includes the study of the interstellar medium (ISM) and giant molecular clouds (GMC) as precursors to the star formation process, and the study of protostars and young stellar objects as its immediate products. It is closely related to planet formation, another branch of astronomy. Star formation theory, as well as accounting for the formation of a single star, must also account for the statistics of binary stars and the initial mass function.In June 2015, astronomers reported evidence for Population III stars in the Cosmos Redshift 7 galaxy at z = 6.60. Such stars are likely to have existed in the very early universe (i.e., at high redshift), and may have started the production of chemical elements heavier than hydrogen that are needed for the later formation of planets and life as we know it.