White dwarfs, black holes, dark matter
... a heavy mass is strongly attracted by gravity, e.g. from Earth; a low mass less so it takes more effort to bring a heavy mass into motion than a light mass: the inert mass of a heavy object is bigger as a result a low-mass object falls equally fast as a heavy one: heavy mass = inert mass. Accidental ...
... a heavy mass is strongly attracted by gravity, e.g. from Earth; a low mass less so it takes more effort to bring a heavy mass into motion than a light mass: the inert mass of a heavy object is bigger as a result a low-mass object falls equally fast as a heavy one: heavy mass = inert mass. Accidental ...
Blue horizontal branch stars in the Sloan Digital Sky Survey:
... et al. 2002; Eisenstein et al. 2001; Strauss et al. 2002). BHB stars appear in the SDSS spectroscopic sample via two main routes. At redshifts around 2.7, the quasar color locus crosses the BHB color locus (Richards et al. 2002) and many BHB stars are targeted as candidate quasars. BHB stars are als ...
... et al. 2002; Eisenstein et al. 2001; Strauss et al. 2002). BHB stars appear in the SDSS spectroscopic sample via two main routes. At redshifts around 2.7, the quasar color locus crosses the BHB color locus (Richards et al. 2002) and many BHB stars are targeted as candidate quasars. BHB stars are als ...
PPT Lecture Notes
... • What are the evolutionary advantages of being sensitive to light, per se (versus some other part of the E.M. spectrum)? • Light is “bouncy”. Unlike longer-wave energy, which passes through many opaque objects, light can be reflected (‘bounced’) off of objects, making them visible. Light’s a better ...
... • What are the evolutionary advantages of being sensitive to light, per se (versus some other part of the E.M. spectrum)? • Light is “bouncy”. Unlike longer-wave energy, which passes through many opaque objects, light can be reflected (‘bounced’) off of objects, making them visible. Light’s a better ...
Surface temperature distribution and absorption features in Isolated
... magnetized. These systems have been used to make radius measurements [8]. The most reliable way of determining astronomical masses is via Kepler’s third law, therefore it is necessary to use a binary system, where at least one of star spectra can be detected. From Kepler’s law we can obtain the mass ...
... magnetized. These systems have been used to make radius measurements [8]. The most reliable way of determining astronomical masses is via Kepler’s third law, therefore it is necessary to use a binary system, where at least one of star spectra can be detected. From Kepler’s law we can obtain the mass ...
Protecting planets from their stars
... magnetic field strengths of a few G, for example, would emit at a frequency that could not be observed from the ground either due to the Earth’s ionospheric cut-off, or because it does not correspond to the operating frequencies of available instruments. In that regard, the lowoperating frequency of ...
... magnetic field strengths of a few G, for example, would emit at a frequency that could not be observed from the ground either due to the Earth’s ionospheric cut-off, or because it does not correspond to the operating frequencies of available instruments. In that regard, the lowoperating frequency of ...
A hypervelocity star from the Large Magellanic Cloud
... initial velocity between the binary and the single star as the total energy of the system is dominated by the binding energy of the binary rather than by the kinetic energy of the incoming star. Additional experiments performed with initial velocities of 5 and 10 km s−1 showed no appreciable differe ...
... initial velocity between the binary and the single star as the total energy of the system is dominated by the binding energy of the binary rather than by the kinetic energy of the incoming star. Additional experiments performed with initial velocities of 5 and 10 km s−1 showed no appreciable differe ...
Lives of the Stars Lecture 3: What makes a star?
... E = mc2 Since stars are largely hydrogen, they provide this energy by the simplest method: fusing four hydrogen atoms together to form helium. ...
... E = mc2 Since stars are largely hydrogen, they provide this energy by the simplest method: fusing four hydrogen atoms together to form helium. ...
Multiple Jets from the High-Mass (Proto) stellar Cluster AFGL5142
... resolution. Copious near infrared H2 emission knots are associated with the outflow lobes (Hunter et al. 1999; Chen et al. 2005). The high resolution NH3 studies with the VLA reveal a compact disk-like structure of 1′′ .2 in size with large line width of 6.4 km s−1 , and a velocity gradient over a s ...
... resolution. Copious near infrared H2 emission knots are associated with the outflow lobes (Hunter et al. 1999; Chen et al. 2005). The high resolution NH3 studies with the VLA reveal a compact disk-like structure of 1′′ .2 in size with large line width of 6.4 km s−1 , and a velocity gradient over a s ...
Characterizing the Atmospheres of Hot Jupiters: From Spectra to
... this theory by observing three secondary eclipses of TrES-4 over a period of two weeks in Oct. 2007 using the Spitzer Space Telescope, obtaining data at 3.6, 4.5, 5.8, 8.0, and 16 μm. We used the Infrared Spectrograph (IRS) on UT 2007 Oct. 8 to observe an eclipse in the 16 μm peak-up imaging mode. N ...
... this theory by observing three secondary eclipses of TrES-4 over a period of two weeks in Oct. 2007 using the Spitzer Space Telescope, obtaining data at 3.6, 4.5, 5.8, 8.0, and 16 μm. We used the Infrared Spectrograph (IRS) on UT 2007 Oct. 8 to observe an eclipse in the 16 μm peak-up imaging mode. N ...
A Legacy Study of Stellar Life Cycles in the Galactic Center
... Radio images of the Galactic center show numerous “filaments”, powered by synchrotron emission from relativistic electrons spiraling along mGauss magnetic fields ...
... Radio images of the Galactic center show numerous “filaments”, powered by synchrotron emission from relativistic electrons spiraling along mGauss magnetic fields ...
21 cm observation of large-scale structures at z ~ 1
... distance, and σv the source velocity dispersion. The 1 MHz bandwidth mentioned above is only used for computing the galaxy detection thresholds and does not determine the total bandwidth or frequency resolution of an intensity mapping survey. In Table 1 (right), we show the 21 cm brightness for comp ...
... distance, and σv the source velocity dispersion. The 1 MHz bandwidth mentioned above is only used for computing the galaxy detection thresholds and does not determine the total bandwidth or frequency resolution of an intensity mapping survey. In Table 1 (right), we show the 21 cm brightness for comp ...
A transparent material like glass allows light to pass
... the two blunt corners of the crystal. Blunt corner is the corner at which three parallelograms meet with obtuse angles. There will be two blunt corners. In a uniaxial crystal there is only one optic axis. There some other crystals with more than one optic axis and they may be called biaxial crystals ...
... the two blunt corners of the crystal. Blunt corner is the corner at which three parallelograms meet with obtuse angles. There will be two blunt corners. In a uniaxial crystal there is only one optic axis. There some other crystals with more than one optic axis and they may be called biaxial crystals ...
Atomic Spectroscopy
... Quantum Transitions Photoelectric Effect • Heinrich Hertz in 1887 • Found that light whose frequency was lower than a certain critical value did not eject any electrons at all. • This dependence on frequency didn't make any sense in terms of the classical wave theory of light. Chem 4631 ...
... Quantum Transitions Photoelectric Effect • Heinrich Hertz in 1887 • Found that light whose frequency was lower than a certain critical value did not eject any electrons at all. • This dependence on frequency didn't make any sense in terms of the classical wave theory of light. Chem 4631 ...
The Properties of Super Star Clusters in A Sample of
... mountains. Along with my classmates, Marc DeRosa (DeRosa) and Marc Swisdak (Swisdak) were a fundamental part of my support network. Because DeRosa had his office only a few yards away from my own, he was often the recipient of random questions (both technical and scientific). Swisdak was always will ...
... mountains. Along with my classmates, Marc DeRosa (DeRosa) and Marc Swisdak (Swisdak) were a fundamental part of my support network. Because DeRosa had his office only a few yards away from my own, he was often the recipient of random questions (both technical and scientific). Swisdak was always will ...
this PDF file - University of Leicester
... use λI = 10μm and λX = 0.1 nm [8] we get that Metroid Prime would have a temperature range of: 298 ≤ T ≤ 2.98 × 107 K. ...
... use λI = 10μm and λX = 0.1 nm [8] we get that Metroid Prime would have a temperature range of: 298 ≤ T ≤ 2.98 × 107 K. ...
the Launching of Be-Star Disks
... Before discussing speci c driving mechanisms, it is helpful to review the general requirements for propelling material into orbit from a rotating surface. As re ected in the choice of launch sites for terrestrial satellites, this is easiest when the launch occurs from near the equator and into the d ...
... Before discussing speci c driving mechanisms, it is helpful to review the general requirements for propelling material into orbit from a rotating surface. As re ected in the choice of launch sites for terrestrial satellites, this is easiest when the launch occurs from near the equator and into the d ...
Extreme Optics and the Search for Earth-Like Planets
... the extremely high contrast needed to image planets around nearby stars. We have a close-up view of only one star, our Sun. As we all known this particular star has circling it a wealth of smaller objects such as planets, comets, and asteroids. And one of those planets is Earth, our home. All other ...
... the extremely high contrast needed to image planets around nearby stars. We have a close-up view of only one star, our Sun. As we all known this particular star has circling it a wealth of smaller objects such as planets, comets, and asteroids. And one of those planets is Earth, our home. All other ...
PPT
... Some common myths about black holes • Black hole sucks in everything around it. A black hole is not really much different from a regular star of the same mass. If our Sun were to suddenly become a black hole, it’s gravitational field would look exactly the same! The planets will keep moving around ...
... Some common myths about black holes • Black hole sucks in everything around it. A black hole is not really much different from a regular star of the same mass. If our Sun were to suddenly become a black hole, it’s gravitational field would look exactly the same! The planets will keep moving around ...
THE DEARTH OF UV-BRIGHT STARS IN M32
... clusters (the traditional testing ground for stellar evolution), while distance and reddening uncertainties hamper their study in the Galactic field population. In an elliptical galaxy with little or no star formation, the UV-bright stars will consist of stars residing on the hot end of the horizont ...
... clusters (the traditional testing ground for stellar evolution), while distance and reddening uncertainties hamper their study in the Galactic field population. In an elliptical galaxy with little or no star formation, the UV-bright stars will consist of stars residing on the hot end of the horizont ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.