SHADES paper VII (b)
... radio sources (blazars; De Zotti et al. 2005) STRONGLY LENSED proto-spheroids (black dashed line; Negrello et al. 2007) ...
... radio sources (blazars; De Zotti et al. 2005) STRONGLY LENSED proto-spheroids (black dashed line; Negrello et al. 2007) ...
The Sun as the prime example of stellar structure and evolution
... Corona shines at level of one millionth the photosphere. It is Thompson scattered sunlight ...
... Corona shines at level of one millionth the photosphere. It is Thompson scattered sunlight ...
optical quality standards
... OPTICAL QUALITY STANDARDS The U.S. Military defines Quality Level or Grade as different striae levels per Din 3140 and according to MIL-G-174-B. Striae is localized inhomogeneity within the optical material. Test is ...
... OPTICAL QUALITY STANDARDS The U.S. Military defines Quality Level or Grade as different striae levels per Din 3140 and according to MIL-G-174-B. Striae is localized inhomogeneity within the optical material. Test is ...
Cosmology questions (Introduction)
... A space tourist spends a day (Sunrise to Sunrise) on each planet in the Solar System, before travelling to the next planet aboard a futuristic spacecraft which can travel at 0.1% of the speed of light, c 2.998 108 ms-1 Ignoring relativistic effects and also differences in distances between the pl ...
... A space tourist spends a day (Sunrise to Sunrise) on each planet in the Solar System, before travelling to the next planet aboard a futuristic spacecraft which can travel at 0.1% of the speed of light, c 2.998 108 ms-1 Ignoring relativistic effects and also differences in distances between the pl ...
The Luminosity
... - Overall luminosity of star goes up and becomes a red giant. - 300million yrs later: Core gets hot enough to fuse helium. - Helium Flash! Burns helium for about another billion years. (back on main sequence - Eventually the core contains only inert carbon, and a shell around the core starts burnin ...
... - Overall luminosity of star goes up and becomes a red giant. - 300million yrs later: Core gets hot enough to fuse helium. - Helium Flash! Burns helium for about another billion years. (back on main sequence - Eventually the core contains only inert carbon, and a shell around the core starts burnin ...
Document
... If the Sun (spin rate 1/25 days, radius 7108 m) were to collapse to a neutron star with a radius of 12 km, how fast would it be spinning? ...
... If the Sun (spin rate 1/25 days, radius 7108 m) were to collapse to a neutron star with a radius of 12 km, how fast would it be spinning? ...
Chapter 16
... cluster sizes to 100 times the mass of the Milky Way – Census of galaxies nearby: Most are dim dwarf E and dwarf Irr sparsely populated with stars – Census of distant galaxies: In clusters, 60% of members are spirals and S0, while in sparsely populated regions it is 80% – Early (very young) galaxies ...
... cluster sizes to 100 times the mass of the Milky Way – Census of galaxies nearby: Most are dim dwarf E and dwarf Irr sparsely populated with stars – Census of distant galaxies: In clusters, 60% of members are spirals and S0, while in sparsely populated regions it is 80% – Early (very young) galaxies ...
Unresolved Stellar Populations
... age t, Φ(M )dM is the IMF (assumed to be the Salpeter IMF here). while Ml and Mu are the lower and upper limit to the mass of the stars. The choice of Ml , as long as sufficiently small, should not affect significantly the value of Fλ , whereas Mu is not an independent parameter and is the function ...
... age t, Φ(M )dM is the IMF (assumed to be the Salpeter IMF here). while Ml and Mu are the lower and upper limit to the mass of the stars. The choice of Ml , as long as sufficiently small, should not affect significantly the value of Fλ , whereas Mu is not an independent parameter and is the function ...
Frontiers of Astronomy. Fred Hoyle. The Expanding Universe
... Frontiers of Astronomy. Fred Hoyle. The Expanding Universe Elements other than hydrogen are built up by nuclear reactions occurring inside evolving stars. Such elements are constantly being blown out into the interstellar gas by the exploding stars. Heavy element content of a star can be interpreted ...
... Frontiers of Astronomy. Fred Hoyle. The Expanding Universe Elements other than hydrogen are built up by nuclear reactions occurring inside evolving stars. Such elements are constantly being blown out into the interstellar gas by the exploding stars. Heavy element content of a star can be interpreted ...
File
... Rather than use such large numbers, we can compare a star’s luminosity relative to the Sun. ...
... Rather than use such large numbers, we can compare a star’s luminosity relative to the Sun. ...
Infrared Spectrometry
... result of passing through the interferometer, the frequency information in the time domain signal can now be detected. I(t) = ∫ I(ν) cos2πtdν This cos Fourier transform finds the frequencies and intensities which fit the time domain spectrum using a computer algorithm. For a continuous source (used ...
... result of passing through the interferometer, the frequency information in the time domain signal can now be detected. I(t) = ∫ I(ν) cos2πtdν This cos Fourier transform finds the frequencies and intensities which fit the time domain spectrum using a computer algorithm. For a continuous source (used ...
abstract english
... group of stars bound by their gravitational interaction, also known as a galaxy. Moreover, it turns out that some of the “stars” we see on the sky are actually galaxies. In fact, we now know that there are more than a hundred billion galaxies in our vast Universe. Remarkably, their collective motion ...
... group of stars bound by their gravitational interaction, also known as a galaxy. Moreover, it turns out that some of the “stars” we see on the sky are actually galaxies. In fact, we now know that there are more than a hundred billion galaxies in our vast Universe. Remarkably, their collective motion ...
energy - Edublogs
... • For example: our money is measured in a quantum of one cent. You can have 1 cent, 2 cents, 8 cents, etc., but you can’t have 1.24 cents or 19.68 cents! You must jump from 1 to 2 to 3 to 4, etc. • Electric charge, which ultimately comes from either a proton or an electron, is QUANTIZED. • There is ...
... • For example: our money is measured in a quantum of one cent. You can have 1 cent, 2 cents, 8 cents, etc., but you can’t have 1.24 cents or 19.68 cents! You must jump from 1 to 2 to 3 to 4, etc. • Electric charge, which ultimately comes from either a proton or an electron, is QUANTIZED. • There is ...
feb18_rg
... 2. Consider a warm, mainly neutral IS cloud: no nearby continuum sources, no Lyman ...
... 2. Consider a warm, mainly neutral IS cloud: no nearby continuum sources, no Lyman ...
New Discoveries in Planetary Systems and Star Formation through
... disks and debris disks will inspire new ideas to explain how planets form and migrate within young systems. We will not only continue to discover new and interesting planets but we will also begin to characterize and classify the properties of these planets and their atmospheres and cores. The disco ...
... disks and debris disks will inspire new ideas to explain how planets form and migrate within young systems. We will not only continue to discover new and interesting planets but we will also begin to characterize and classify the properties of these planets and their atmospheres and cores. The disco ...
Star Formation 1 - Center for Astrostatistics
... faster (i.e., when the temperature of the gas is higher). Gas pressure P = n k T where n is the density of atoms, k is Boltzmann's constant, and T is the temperature (Ideal gas law, Boltzmann mid-1800s) So, the cloud of atoms starts gravitational collapse, gas heats up as density increase, and colla ...
... faster (i.e., when the temperature of the gas is higher). Gas pressure P = n k T where n is the density of atoms, k is Boltzmann's constant, and T is the temperature (Ideal gas law, Boltzmann mid-1800s) So, the cloud of atoms starts gravitational collapse, gas heats up as density increase, and colla ...
Document
... long P, high amplitude High density short P, low amplitude Density profile decides how deep the pulsations penetrate in the star. ...
... long P, high amplitude High density short P, low amplitude Density profile decides how deep the pulsations penetrate in the star. ...
The Properties of Light Review: The distance between similar
... models. Light doesn’t have to match our models, we have to match our models to light. Double slit pattern with very low intensity light ...
... models. Light doesn’t have to match our models, we have to match our models to light. Double slit pattern with very low intensity light ...
PHY2083 ASTRONOMY
... Fairly average star, but with a very unique feature: it is extremely nearby, only 1.49 x 1011m! Only 8 light mins. away, c.f. our next nearest neighbour, alpha Cen ~ 300 000x further away (4.3 ly) ...
... Fairly average star, but with a very unique feature: it is extremely nearby, only 1.49 x 1011m! Only 8 light mins. away, c.f. our next nearest neighbour, alpha Cen ~ 300 000x further away (4.3 ly) ...
sma_overview - Harvard-Smithsonian Center for Astrophysics
... The SMA is a collaborative project of the Smithsonian Astrophysical Observatory, part of the Harvard-Smithsonian Center for Astrophysics, and the Academia Sinica Institute of Astronomy and Astrophysics (Taiwan) ...
... The SMA is a collaborative project of the Smithsonian Astrophysical Observatory, part of the Harvard-Smithsonian Center for Astrophysics, and the Academia Sinica Institute of Astronomy and Astrophysics (Taiwan) ...
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.