Document
... 1. Why is it important that telescopes be large? 2. Why do most modern telescopes use a large mirror rather than a large lens? 3. Why are observatories in such remote locations? 4. Do astronomers use ordinary photographic film to take pictures of the sky? Do they actually look through large telescop ...
... 1. Why is it important that telescopes be large? 2. Why do most modern telescopes use a large mirror rather than a large lens? 3. Why are observatories in such remote locations? 4. Do astronomers use ordinary photographic film to take pictures of the sky? Do they actually look through large telescop ...
Survey of the Universe
... The farther an object is from us, the faster it is moving away from us. ...
... The farther an object is from us, the faster it is moving away from us. ...
l~ JHd 111
... in the Iight-eurve which repeats every 111 min. during outburst, while its orbital period is only 107 min.! What is the physical meaning of another period, 4 per cent longer than the orbital? A new feature-unexpeeted, observed, not understood. Scienee is like the old Greek legen.dary snake Hydra wit ...
... in the Iight-eurve which repeats every 111 min. during outburst, while its orbital period is only 107 min.! What is the physical meaning of another period, 4 per cent longer than the orbital? A new feature-unexpeeted, observed, not understood. Scienee is like the old Greek legen.dary snake Hydra wit ...
Slide 1
... Iron in clusters (ICM+stars) easy to detect and to deduce total iron mass. Balestra et al. (2007) ...
... Iron in clusters (ICM+stars) easy to detect and to deduce total iron mass. Balestra et al. (2007) ...
For stars
... Earth’s Orbital Motion The Twelve constellations (some say thirteen) that the Sun moves through during the year are called the zodiac; The view of the night sky changes as Earth moves in its orbit about the Sun. As drawn here, the night side of Earth faces a different set of constellations at diffe ...
... Earth’s Orbital Motion The Twelve constellations (some say thirteen) that the Sun moves through during the year are called the zodiac; The view of the night sky changes as Earth moves in its orbit about the Sun. As drawn here, the night side of Earth faces a different set of constellations at diffe ...
X-ray binaries
... Donors can be WDs, or normal low-mass stars (main sequence or sub-giants). Many sources are found in globular clusters. Also there are more and more LMXBs found in more distant galaxies. In optics the emission is dominated by an accretion disc around a compact object. Clear classification is based o ...
... Donors can be WDs, or normal low-mass stars (main sequence or sub-giants). Many sources are found in globular clusters. Also there are more and more LMXBs found in more distant galaxies. In optics the emission is dominated by an accretion disc around a compact object. Clear classification is based o ...
18th Cambridge Workshop on Cool Stars, Stellar Systems, and the... Proceedings of Lowell Observatory (9-13 June 2014)
... “Superflares” are a strong type of flare with energy E > 1033 erg. Their associated CMEs and energetic particles can damage satellites, power grids and astronauts/air travellers. They can ionise, alter and strip atmospheres of surrounding planets; damage their ozone layers and increase mutagenic rad ...
... “Superflares” are a strong type of flare with energy E > 1033 erg. Their associated CMEs and energetic particles can damage satellites, power grids and astronauts/air travellers. They can ionise, alter and strip atmospheres of surrounding planets; damage their ozone layers and increase mutagenic rad ...
484
... s:une as that 01’tlie emitting particles, but their divergence is the convolution of the angular distribution of the particles with the opening of the light cone. For the sake of simplicity, J shall assume this cone to habe :I gaussian profile. The photon flux will then also be bignuhsian. and one c ...
... s:une as that 01’tlie emitting particles, but their divergence is the convolution of the angular distribution of the particles with the opening of the light cone. For the sake of simplicity, J shall assume this cone to habe :I gaussian profile. The photon flux will then also be bignuhsian. and one c ...
CHAPTER 15. LASER AND FIBER OPTICS The laser is essentially
... Lasers are classified in many ways. Sometimes they are grouped according to the state of matter represented by the laser medium: gas, liquid, or solid. Sometimes they are classified according to how they are pumped: flashlamp, electrical discharge, chemical actions, and so on. Other classifications ...
... Lasers are classified in many ways. Sometimes they are grouped according to the state of matter represented by the laser medium: gas, liquid, or solid. Sometimes they are classified according to how they are pumped: flashlamp, electrical discharge, chemical actions, and so on. Other classifications ...
Ans. - Testlabz.com
... Ans. A football which is placed near us will appear more bigger than a football placed at a distance of 100 m. Q.33. The star Alpha Centauri is at a distance of about 40,000, 000,000,000 km from the Earth. Can you read this distance in kilometers conveniently? Ans. 40,000,000,000,000 = 4 × 1013 km. ...
... Ans. A football which is placed near us will appear more bigger than a football placed at a distance of 100 m. Q.33. The star Alpha Centauri is at a distance of about 40,000, 000,000,000 km from the Earth. Can you read this distance in kilometers conveniently? Ans. 40,000,000,000,000 = 4 × 1013 km. ...
Structure of Neutron Stars - Relativistic Astrophysics Department
... Kv – observed semi-amplitude of line of sight velocity of the normal star (in km/s), P – orbital period (in days), e – orbital eccentricity, i – orbital inclination (the angle between the prbital plane and line of sight). ...
... Kv – observed semi-amplitude of line of sight velocity of the normal star (in km/s), P – orbital period (in days), e – orbital eccentricity, i – orbital inclination (the angle between the prbital plane and line of sight). ...
Supernovae — Oct 21 10/21/2011 • Outline
... Pressure on the walls of the box is caused by the gas hitting the walls. Gas transfers momentum to the walls. Mental picture: Marbles hit the walls; wall pushes back. ...
... Pressure on the walls of the box is caused by the gas hitting the walls. Gas transfers momentum to the walls. Mental picture: Marbles hit the walls; wall pushes back. ...
Astrophotography Manual
... The faster the film the bigger the crystals The bigger the crystals, the easier you lose stars as stars in between the crystals are not recorded and the more disgusting the photos will look. So to avoid loss of image, never exceed film speed of ISO 3200. There is only one type of film that i ...
... The faster the film the bigger the crystals The bigger the crystals, the easier you lose stars as stars in between the crystals are not recorded and the more disgusting the photos will look. So to avoid loss of image, never exceed film speed of ISO 3200. There is only one type of film that i ...
Three Coordinate Systems
... as a time going east – 0 to 24 hours is 360o “Prime meridian” – point where sun is located at the vernal equinox (spring) (called vernal equinoctial colure) ...
... as a time going east – 0 to 24 hours is 360o “Prime meridian” – point where sun is located at the vernal equinox (spring) (called vernal equinoctial colure) ...
Importance of the bonus lines (depends on excitation)
... Very simple geometry which allows detailed modeling ...
... Very simple geometry which allows detailed modeling ...
Three Coordinate Systems
... as a time going east – 0 to 24 hours is 360o “Prime meridian” – point where sun is located at the vernal equinox (spring) (called vernal equinoctial colure) ...
... as a time going east – 0 to 24 hours is 360o “Prime meridian” – point where sun is located at the vernal equinox (spring) (called vernal equinoctial colure) ...
optical_phenomena
... Here tree and buildings on a distant shore line appear taller than they really are. They've effectively been stretched vertically. (Here's the source of this image) ...
... Here tree and buildings on a distant shore line appear taller than they really are. They've effectively been stretched vertically. (Here's the source of this image) ...
Diffraction Grating - UCSD Department of Physics
... A binary star system has one massive star at rest and another smaller star rotating about it. The hydrogen a line for the rotating star is Doppler shifted from =656.272nm to =656.215nm. What order spectrum is required for astronomers to resolve these lines when using a grating that is 2.5cm wide w ...
... A binary star system has one massive star at rest and another smaller star rotating about it. The hydrogen a line for the rotating star is Doppler shifted from =656.272nm to =656.215nm. What order spectrum is required for astronomers to resolve these lines when using a grating that is 2.5cm wide w ...
From ATLASGAL to SEDIGISM: Towards a Complete 3D View of the
... sizes of the clumps. Therefore, an extensive programme of follow-up observations in ammonia lines was started; such observations have the advantage of providing gas temperatures in the clumps, by combining the information about the simultaneously observed (1,1) and (2,2) ammonia inversion transition ...
... sizes of the clumps. Therefore, an extensive programme of follow-up observations in ammonia lines was started; such observations have the advantage of providing gas temperatures in the clumps, by combining the information about the simultaneously observed (1,1) and (2,2) ammonia inversion transition ...
Chemical Evolution
... All stellar components of the Milky Way contain very old stars (but where are first stars?) Little evidence for variations in stellar IMF, over wide range of metallicity, age, local density… Small-scale problems with CDM persist, but things are evolving rapidly and the next few years will reall ...
... All stellar components of the Milky Way contain very old stars (but where are first stars?) Little evidence for variations in stellar IMF, over wide range of metallicity, age, local density… Small-scale problems with CDM persist, but things are evolving rapidly and the next few years will reall ...
Explosion and remnants of massive stars
... with the core collapse of massive stars. Instead they are caused by the thermonuclear explosion of a CO white dwarf that reaches a critical mass for carbon ignition. Carbon-burning reactions can occur in a low-temperature degenerate gas if the density is sufficiently high, about 2 × 109 g/cm3 (these ...
... with the core collapse of massive stars. Instead they are caused by the thermonuclear explosion of a CO white dwarf that reaches a critical mass for carbon ignition. Carbon-burning reactions can occur in a low-temperature degenerate gas if the density is sufficiently high, about 2 × 109 g/cm3 (these ...
Global Warming and the Next Ice Age
... Major galaxy mergers are in fact a prediction of the Cold Dark Matter cosmology and are predicted to occur in simulations of galaxy formation (1). But understanding and tracing the extent of major mergers in the early universe is difficult. Recently it was shown that high-resolution Hubble Space Tel ...
... Major galaxy mergers are in fact a prediction of the Cold Dark Matter cosmology and are predicted to occur in simulations of galaxy formation (1). But understanding and tracing the extent of major mergers in the early universe is difficult. Recently it was shown that high-resolution Hubble Space Tel ...
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.