CoRoT III programme
... Because CoRoT is probing effects that were not detectable so far, new types of signal analysis as well as new theoretical tools are being developed. All these data are being interpreted in terms of planetary systems evolution and physical processes in stellar interiors. Most of these results are pub ...
... Because CoRoT is probing effects that were not detectable so far, new types of signal analysis as well as new theoretical tools are being developed. All these data are being interpreted in terms of planetary systems evolution and physical processes in stellar interiors. Most of these results are pub ...
Unfolding the Milky Way bulge - International Max Planck Research
... 5.5 (J − K s ) and (J − H) color difference between our control field and those measured in the subfields of tiles b317, b303 and b275. The size of the subfields corresponds to the same resolution described in Fig. 2. The blue dashed line shows the relation E(J − H) = 0.638E(J − K s ) corresponding ...
... 5.5 (J − K s ) and (J − H) color difference between our control field and those measured in the subfields of tiles b317, b303 and b275. The size of the subfields corresponds to the same resolution described in Fig. 2. The blue dashed line shows the relation E(J − H) = 0.638E(J − K s ) corresponding ...
Particle Physics from Stars
... where the nonlinear interplay of the equations of stellar structure is represented in a simple analytic fashion [ 16]. The solar luminosity is well measured, yet this brightening effect is not observable because all else need not be equal. The present-day luminosity of the Sun depends on its unknown ...
... where the nonlinear interplay of the equations of stellar structure is represented in a simple analytic fashion [ 16]. The solar luminosity is well measured, yet this brightening effect is not observable because all else need not be equal. The present-day luminosity of the Sun depends on its unknown ...
The Lupus clouds - European Southern Observatory
... The Lupus clouds are projected on the sky against the nearest and one of the best studied OB associations, Scorpius-Centaurus (e.g. Blaauw 1991, de Geus et al. 1989, de Geus 1992, Preibisch et al. 2002; see also chapter by Preibisch & Mamajek). The Scorpius-Centaurus association is a vast complex in ...
... The Lupus clouds are projected on the sky against the nearest and one of the best studied OB associations, Scorpius-Centaurus (e.g. Blaauw 1991, de Geus et al. 1989, de Geus 1992, Preibisch et al. 2002; see also chapter by Preibisch & Mamajek). The Scorpius-Centaurus association is a vast complex in ...
Communications in Asteroseismology
... the first results from space asteroseismology are available? Isn’t it odd to celebrate the 65th birthday of a renowned asteroseismologist who is far from retirement at this point? The answer to the first question is easy: at the outset of this meeting, MOST was already in space and COROT was soon to b ...
... the first results from space asteroseismology are available? Isn’t it odd to celebrate the 65th birthday of a renowned asteroseismologist who is far from retirement at this point? The answer to the first question is easy: at the outset of this meeting, MOST was already in space and COROT was soon to b ...
Protoplanetary Disks and their Evolution
... quickly and that the flow of material from the envelope, which declines in mass by almost an order of magnitude between these two classes (Young et al. 2003), is rapidly transported through the disk. One possibility for the rapid transport is disk instabilities. Laughlin & Bodenheimer (1994) first s ...
... quickly and that the flow of material from the envelope, which declines in mass by almost an order of magnitude between these two classes (Young et al. 2003), is rapidly transported through the disk. One possibility for the rapid transport is disk instabilities. Laughlin & Bodenheimer (1994) first s ...
Understanding Variable Stars - Central Florida Astronomical Society
... Understanding Variable Stars Variable stars are those that change brightness. Their variability may be due to geometric processes such as rotation, or eclipse by a companion star, or physical processes such as vibration, flares, or cataclysmic explosions. In each case, variable stars provide unique ...
... Understanding Variable Stars Variable stars are those that change brightness. Their variability may be due to geometric processes such as rotation, or eclipse by a companion star, or physical processes such as vibration, flares, or cataclysmic explosions. In each case, variable stars provide unique ...
A spectroscopic study of detached binary systems using precise radial velocities
... fundamental properties of stars. One of these properties is the stellar mass, which is regarded as being the most important of all, since most other stellar characteristics are very sensitive to the mass. Therefore, empirical masses, combined with measurements of other stellar properties, such as ra ...
... fundamental properties of stars. One of these properties is the stellar mass, which is regarded as being the most important of all, since most other stellar characteristics are very sensitive to the mass. Therefore, empirical masses, combined with measurements of other stellar properties, such as ra ...
Here - NASA/IPAC Extragalactic Database
... H ii regions are ionized clouds of gas associated with zones of recent star formation. They are powered by one, a few, or a cluster of massive stars (depending on the resolution at which one is working). The effective temperatures T? of the ionizing stars lie in the range 35 000 – 50 000 K. The nebu ...
... H ii regions are ionized clouds of gas associated with zones of recent star formation. They are powered by one, a few, or a cluster of massive stars (depending on the resolution at which one is working). The effective temperatures T? of the ionizing stars lie in the range 35 000 – 50 000 K. The nebu ...
Worlds Beyond The Poles
... press as “More daring than anything Jules Verne ever conceived.” Today, thirty years later, the United States, Russia, Argentina, and other nations have bases on that realistic land extent which is beyond the Earth. It is not space, as theory dictated; it is land and water of the same order that co ...
... press as “More daring than anything Jules Verne ever conceived.” Today, thirty years later, the United States, Russia, Argentina, and other nations have bases on that realistic land extent which is beyond the Earth. It is not space, as theory dictated; it is land and water of the same order that co ...
The VIMOS Ultra-Deep Survey (VUDS): Fast Increase in the Fraction
... the neutral hydrogen and/or by the dust. As a result, in general, Lyα emission is more attenuated than other UV photons, with the Lyα escape fraction (i.e., the fraction of the Lyα photons that escape the galaxies) that depends strongly on the relative kinematics of the HII and HI regions, dust cont ...
... the neutral hydrogen and/or by the dust. As a result, in general, Lyα emission is more attenuated than other UV photons, with the Lyα escape fraction (i.e., the fraction of the Lyα photons that escape the galaxies) that depends strongly on the relative kinematics of the HII and HI regions, dust cont ...
c Copyright by Jonathan C. McKinney, 2004
... and rout = 600GM/c2 ). Shown are the density (upper left), Bernoulli parameter (Be = (1/2)v 2 + c2s /(γ − 1) + Ψ) (upper right; dotted line is a negative contour), scaled mass flux r2 sin θ(ρ0 v) (lower left), and scaled angular momentum flux r3 sin2 θ(ρ0 vvφ + Π · φ̂) (lower right). The flow is not ...
... and rout = 600GM/c2 ). Shown are the density (upper left), Bernoulli parameter (Be = (1/2)v 2 + c2s /(γ − 1) + Ψ) (upper right; dotted line is a negative contour), scaled mass flux r2 sin θ(ρ0 v) (lower left), and scaled angular momentum flux r3 sin2 θ(ρ0 vvφ + Π · φ̂) (lower right). The flow is not ...
X-ray astronomy of stellar coronae (Review)
... While this review is entirely devoted to (non-solar) stellar studies, an important anchor point would be missing if the success of the Skylab mission in the early seventies were not mentioned. The high-quality images of the full-disk Sun in X-rays formed, together with data from previous rocket flig ...
... While this review is entirely devoted to (non-solar) stellar studies, an important anchor point would be missing if the success of the Skylab mission in the early seventies were not mentioned. The high-quality images of the full-disk Sun in X-rays formed, together with data from previous rocket flig ...
8th Grade Science
... At the center of an atom is the nucleus (plural, nuclei). The nucleus contains most of the atom’s mass. However, in size, it’s just a tiny part of the atom. The model in Figure above is not to scale. If an atom were the size of a football stadium, the nucleus would be only about the size of a pea. T ...
... At the center of an atom is the nucleus (plural, nuclei). The nucleus contains most of the atom’s mass. However, in size, it’s just a tiny part of the atom. The model in Figure above is not to scale. If an atom were the size of a football stadium, the nucleus would be only about the size of a pea. T ...
Observations and Theory of Dynamical Triggers for Star Formation
... or recollects into denser cores in which star clusters eventually form. Large scale triggering (Table 3): accumulation of gas into an expanding shell or ring partially surrounding the pressure source, with star formation in the shell or ring presumably triggered by gravitational collapse of swept-up ...
... or recollects into denser cores in which star clusters eventually form. Large scale triggering (Table 3): accumulation of gas into an expanding shell or ring partially surrounding the pressure source, with star formation in the shell or ring presumably triggered by gravitational collapse of swept-up ...
harlow shapley - National Academy of Sciences
... brightness of every variable star on a photograph had to be performed, and the period of light variation and median apparent magnitude for every star of interest had to be determined with care. Shapley did not have available calibrated median absolute luminosities for the stars in which he was inter ...
... brightness of every variable star on a photograph had to be performed, and the period of light variation and median apparent magnitude for every star of interest had to be determined with care. Shapley did not have available calibrated median absolute luminosities for the stars in which he was inter ...
The evolution of close binaries with white dwarf components
... When one of the stars overflows its Roche lobe, it tends to lose most of its envelope. The evolution of the star is significantly shortened or even stopped prematurely. In the latter case, nuclear burning ceases after the mass transfer phase. Consequently, the inert core contracts and cools down to fo ...
... When one of the stars overflows its Roche lobe, it tends to lose most of its envelope. The evolution of the star is significantly shortened or even stopped prematurely. In the latter case, nuclear burning ceases after the mass transfer phase. Consequently, the inert core contracts and cools down to fo ...
The Day We Found the Universe
... happily changed to civil reckoning for determining the start of a day. No longer would the astronomical day begin at high noon, a tradition launched in the days of Ptolemy that often led to great bookkeeping confusion. Instead, it now began at midnight, just as it did for everyone else. “It will pro ...
... happily changed to civil reckoning for determining the start of a day. No longer would the astronomical day begin at high noon, a tradition launched in the days of Ptolemy that often led to great bookkeeping confusion. Instead, it now began at midnight, just as it did for everyone else. “It will pro ...
The impact of mass-loss on the evolution and pre
... When extended blue loops or blue ward excursions are produced by enhanced mass-loss, the models predict that a majority of blue (yellow) supergiants are post RSG objects. These post RSG stars are predicted to show much smaller surface rotational velocities than similar blue supergiants on their firs ...
... When extended blue loops or blue ward excursions are produced by enhanced mass-loss, the models predict that a majority of blue (yellow) supergiants are post RSG objects. These post RSG stars are predicted to show much smaller surface rotational velocities than similar blue supergiants on their firs ...
Giant star seismology
... tremendously using these seismic inferences, and we anticipate that more information is still hidden in the data. Unraveling this will further improve our understanding of stellar evolution. This will also have significant impact on our knowledge of the Milky Way Galaxy as well as on exo-planet host ...
... tremendously using these seismic inferences, and we anticipate that more information is still hidden in the data. Unraveling this will further improve our understanding of stellar evolution. This will also have significant impact on our knowledge of the Milky Way Galaxy as well as on exo-planet host ...
PDF hosted at the Radboud Repository of the Radboud University
... It should be noted that despite the general homogeneity of type Ia supernova explosions, there is growing observational evidence of a number of distinctive sub-groups (e.g. several subclasses of sub- and super-luminous events) which exhibit small, yet noticeable and systematic spectroscopic and phot ...
... It should be noted that despite the general homogeneity of type Ia supernova explosions, there is growing observational evidence of a number of distinctive sub-groups (e.g. several subclasses of sub- and super-luminous events) which exhibit small, yet noticeable and systematic spectroscopic and phot ...
Report from the Subaru Telescope for External
... dark matter. Lensing studies of clusters have indeed confirmed several important predictions of the standard-cold dark matter dominated (CDM) model. Okabe et al.(2010) used high-quality Subaru Telescope/Suprime-Cam imaging data to conduct a detailed weak lensing study of the distribution of dark matt ...
... dark matter. Lensing studies of clusters have indeed confirmed several important predictions of the standard-cold dark matter dominated (CDM) model. Okabe et al.(2010) used high-quality Subaru Telescope/Suprime-Cam imaging data to conduct a detailed weak lensing study of the distribution of dark matt ...
1 Globular Cluster Systems - McMaster Physics and Astronomy
... there are still a few clusters with exceptionally high reddenings embedded deep in the Galactic bulge about which we know almost nothing (see the listings in Harris 1996a). However, progress over the years has been steady and substantial: compare the two graphs in Fig. 1.4. One (from the data of Sha ...
... there are still a few clusters with exceptionally high reddenings embedded deep in the Galactic bulge about which we know almost nothing (see the listings in Harris 1996a). However, progress over the years has been steady and substantial: compare the two graphs in Fig. 1.4. One (from the data of Sha ...