Institute for Astrophysical Research Seminar Series
... Finding the Answer to the 35 Year Problem of the Unidentified Infrared Emission Features ...
... Finding the Answer to the 35 Year Problem of the Unidentified Infrared Emission Features ...
Small Wonders: Cygnus
... components of the Summer triangle – the others being Vega (Lyra) and Altair (Aquila). At mag 1.25 Deneb is the 19th brightest star in the night sky. Its brightness is somewhat amazing in relation to its distance. Most bright stars are relatively close. Not Deneb. Distance estimates place it at 3229 ...
... components of the Summer triangle – the others being Vega (Lyra) and Altair (Aquila). At mag 1.25 Deneb is the 19th brightest star in the night sky. Its brightness is somewhat amazing in relation to its distance. Most bright stars are relatively close. Not Deneb. Distance estimates place it at 3229 ...
How to deal with the Equations in the homeworks
... seeks to acquire knowledge that supersedes the natural world, giving “reason” or “purpose” to the seemingly arbitrary or capricious nature of what happens to people on a day-to-day basis, or across one life or across many generations. Revelation is also strongly person-centric, meaning its goals are ...
... seeks to acquire knowledge that supersedes the natural world, giving “reason” or “purpose” to the seemingly arbitrary or capricious nature of what happens to people on a day-to-day basis, or across one life or across many generations. Revelation is also strongly person-centric, meaning its goals are ...
Archaeoastronomical Study of the Main Pyramids of Giza
... 2. Comparison between the Positions of the Giza Pyramids and Those of Orion Belt Stars A very famous archaeological site where the astronomical knowledge of the Egyptians, joint to their religious credence, could have played a relevant role in the monument building is the pyramid complex located in ...
... 2. Comparison between the Positions of the Giza Pyramids and Those of Orion Belt Stars A very famous archaeological site where the astronomical knowledge of the Egyptians, joint to their religious credence, could have played a relevant role in the monument building is the pyramid complex located in ...
Stellar populations
... 2. Compare with MV vs (B-V) for Hyades (MV is known from moving cluster method) ...
... 2. Compare with MV vs (B-V) for Hyades (MV is known from moving cluster method) ...
Fluorine abundances in dwarf stars of the solar neighbourhood⋆
... Cloud and in the globular cluster ω Cen. They found that the abundance ratio of F/O declines as the oxygen abundance decreases. They therefore suggested that the observed low values of F/O exclude AGB synthesis as the dominant source of fluorine in their targeted stellar populations. In particular, ...
... Cloud and in the globular cluster ω Cen. They found that the abundance ratio of F/O declines as the oxygen abundance decreases. They therefore suggested that the observed low values of F/O exclude AGB synthesis as the dominant source of fluorine in their targeted stellar populations. In particular, ...
Time, quantum and information
... the sun hit the chlorine-37 nuclei, they occasionally produced argon-37 nuclei, which were extracted and counted by their radioactive decay. The results were published in 1968 [11]. However, these were neutrinos with higher energies which are not produced in the main branch of the proton-proton cycl ...
... the sun hit the chlorine-37 nuclei, they occasionally produced argon-37 nuclei, which were extracted and counted by their radioactive decay. The results were published in 1968 [11]. However, these were neutrinos with higher energies which are not produced in the main branch of the proton-proton cycl ...
Chapter 5 Energy transport in stellar interiors
... and, more importantly, their mean free paths increase (most of the quantum cells of phase space are occupied, so an electron has to travel further to find an empty cell and transfer its momentum). At very high densities, when ℓe ≫ ℓph , electron conduction becomes a much more efficient way of transp ...
... and, more importantly, their mean free paths increase (most of the quantum cells of phase space are occupied, so an electron has to travel further to find an empty cell and transfer its momentum). At very high densities, when ℓe ≫ ℓph , electron conduction becomes a much more efficient way of transp ...
Next Generation VLA Science White Paper
... A next generation VLA offers the chance to change this: it will make detailed cmand mm-wave spectroscopy a survey tool, allowing it to be deployed to study all kinds of objects and not only a few bright regions. For example, if the telescope is optimized to this purpose it will be possible to • Surv ...
... A next generation VLA offers the chance to change this: it will make detailed cmand mm-wave spectroscopy a survey tool, allowing it to be deployed to study all kinds of objects and not only a few bright regions. For example, if the telescope is optimized to this purpose it will be possible to • Surv ...
PDF format
... what would happen if a star orbiting in a direction opposite the neutron's star rotation fell onto a neutron star? A. The neutron star's rotation would speed up. B. The neutron star's rotation would slow down. C. Nothing. The directions would cancel each other out. ...
... what would happen if a star orbiting in a direction opposite the neutron's star rotation fell onto a neutron star? A. The neutron star's rotation would speed up. B. The neutron star's rotation would slow down. C. Nothing. The directions would cancel each other out. ...
ASTRONOMY AND ASTROPHYSICS Barium abundances in cool
... results of Magain (1989) or Peterson et al. (1990). Such discrepances are probably arising from the use of giants and supergiants in most of the studies due to the fact that Ba II lines are more easily measured in spectra of luminous stars than in dwarfs. But two points should be carefully considere ...
... results of Magain (1989) or Peterson et al. (1990). Such discrepances are probably arising from the use of giants and supergiants in most of the studies due to the fact that Ba II lines are more easily measured in spectra of luminous stars than in dwarfs. But two points should be carefully considere ...
Neutron Stars
... A neutron star is the collapsed core of a massive star left behind after a supernova explosion. The original massive star contained between 8 and 25 M . (More massive stars collapse into black holes.) The remnant neutron star compresses at least 1.4M into a sphere only about 10-16 km across. This ...
... A neutron star is the collapsed core of a massive star left behind after a supernova explosion. The original massive star contained between 8 and 25 M . (More massive stars collapse into black holes.) The remnant neutron star compresses at least 1.4M into a sphere only about 10-16 km across. This ...
Chapter14 The Bizarre Stellar Graveyard-pptx
... the speed of light. • What would it be like to visit a black hole? – You can orbit a black hole like any other object of the same mass—black holes don't suck! – Near the event horizon, time slows down and ...
... the speed of light. • What would it be like to visit a black hole? – You can orbit a black hole like any other object of the same mass—black holes don't suck! – Near the event horizon, time slows down and ...
Radial Velocity - Yale Exoplanet
... angles are randomly distributed in space, angles close to shift mainly depends on the projection of the velocity vector 90◦ (edge-on systems) are much more frequent than pole- along the line of sight, i.e. the radial velocity of the source. on configurations. Indeed, the distribution function for i ...
... angles are randomly distributed in space, angles close to shift mainly depends on the projection of the velocity vector 90◦ (edge-on systems) are much more frequent than pole- along the line of sight, i.e. the radial velocity of the source. on configurations. Indeed, the distribution function for i ...
Science performance of Gaia, ESA`s space
... The Gaia focal-plane assembly (Laborie et al. 2007) is the largest ever developed for space application, with 106 CCDs (Fig. 6), a total of almost 1,000 million pixels, and a physical dimension of 1.0 m × 0.5 m. The focal-plane assembly is common to both telescopes and serves five main functions: • ...
... The Gaia focal-plane assembly (Laborie et al. 2007) is the largest ever developed for space application, with 106 CCDs (Fig. 6), a total of almost 1,000 million pixels, and a physical dimension of 1.0 m × 0.5 m. The focal-plane assembly is common to both telescopes and serves five main functions: • ...
Written Transcript of this video lesson
... So now that you understand a little bit about how you can use the color of the star to determine its velocity, we can see what Vera Rubin has done. Here’s a graph superimposed on top of the galaxy with her velocity measurements as a function of radius. She did this by just focusing her telescope at ...
... So now that you understand a little bit about how you can use the color of the star to determine its velocity, we can see what Vera Rubin has done. Here’s a graph superimposed on top of the galaxy with her velocity measurements as a function of radius. She did this by just focusing her telescope at ...
PHY 375 - DePaul University
... The strategy in this derivation is to invert the situation. That is, instead of considering a ray of light (hence a point) moving along and striking a star surface of radius R⋆ , think instead of the light as a circular surface of radius R⋆ and the star as a point. In other words, the light moves al ...
... The strategy in this derivation is to invert the situation. That is, instead of considering a ray of light (hence a point) moving along and striking a star surface of radius R⋆ , think instead of the light as a circular surface of radius R⋆ and the star as a point. In other words, the light moves al ...
dark matter - University of Texas Astronomy Home Page
... 2. At right is a picture of a spiral galaxy similar to the Milky Way. The orbits of three stars are labeled. Star A is on the edge of the bulge. The Sun’s orbit is marked by Star B and Star C is farther out in the disk than the Sun. Which star do you think is traveling fastest and which is traveling ...
... 2. At right is a picture of a spiral galaxy similar to the Milky Way. The orbits of three stars are labeled. Star A is on the edge of the bulge. The Sun’s orbit is marked by Star B and Star C is farther out in the disk than the Sun. Which star do you think is traveling fastest and which is traveling ...
3 - Celestial Sphere
... 4) The points on the ecliptic that are farthest from the celestial equator are called solstices. In the northern hemisphere, the June Solstice, when the Sun is in the northern hemisphere, is the Summer Solstice, and the December Solstice, when the Sun is in the southern hemisphere, is the Winter Sol ...
... 4) The points on the ecliptic that are farthest from the celestial equator are called solstices. In the northern hemisphere, the June Solstice, when the Sun is in the northern hemisphere, is the Summer Solstice, and the December Solstice, when the Sun is in the southern hemisphere, is the Winter Sol ...
Chapter 1: Introduction to Galaxies File - QMplus
... very little gas (and therefore very little dust), so almost all of the visible component is in the form of stars. With so little gas, there is no appreciable star formation, with the result that elliptical galaxies contain almost only old stars. Their colours are therefore red. K-type giant stars do ...
... very little gas (and therefore very little dust), so almost all of the visible component is in the form of stars. With so little gas, there is no appreciable star formation, with the result that elliptical galaxies contain almost only old stars. Their colours are therefore red. K-type giant stars do ...
CH14.AST1001.S15.EDS
... • Observed changes in orbit of a binary system consisting of two neutron stars agree precisely with predictions of general relativity • Orbital energy is being carried away by gravitational waves ...
... • Observed changes in orbit of a binary system consisting of two neutron stars agree precisely with predictions of general relativity • Orbital energy is being carried away by gravitational waves ...
Non-thermal hard X-ray emission from stellar coronae
... Ingredients: X-ray photoionization, viscous heating, radiative cooling, and turbulent mixing of gas, dust and grain phases, with ...
... Ingredients: X-ray photoionization, viscous heating, radiative cooling, and turbulent mixing of gas, dust and grain phases, with ...
R136a1
RMC 136a1 (usually abbreviated to R136a1) is a Wolf-Rayet star located at the center of R136, the central condensation of stars of the large NGC 2070 open cluster in the Tarantula Nebula. It lies at a distance of about 50 kiloparsecs (163,000 light-years) in the Large Magellanic Cloud. It has the highest mass and luminosity of any known star, at 265 M☉ and 8.7 million L☉, and also one of the hottest at over 50,000 K.