Origin of Life - BlackSage.com
... • Galaxies appear to be moving away from our galaxy • Initially observed by Edward Hubble in 1927 • Galaxies have a red shift in light produced by the Doppler effect similar to sound (also used in radar) • The movement of galaxies away from us corresponds to an equation called "Hubble's Law" • The t ...
... • Galaxies appear to be moving away from our galaxy • Initially observed by Edward Hubble in 1927 • Galaxies have a red shift in light produced by the Doppler effect similar to sound (also used in radar) • The movement of galaxies away from us corresponds to an equation called "Hubble's Law" • The t ...
Slide 1
... Digression: what makes the jet? • Jets are ubiquitous in nature: AGNs, QSOs, XRBs, YSOs, GRBs... • They are not required by any physical law (such as energy conservation). • The 3 proposed mechanisms of jet acceleration: – Radiation pressure – Thermal expansion – Magnetic fields and rotation • Jet ...
... Digression: what makes the jet? • Jets are ubiquitous in nature: AGNs, QSOs, XRBs, YSOs, GRBs... • They are not required by any physical law (such as energy conservation). • The 3 proposed mechanisms of jet acceleration: – Radiation pressure – Thermal expansion – Magnetic fields and rotation • Jet ...
Acrobat ® file - Numerical Recipes
... Note that since N is conserved (Liouville) and E is constant for each photon, I is conserved too! If you look at a source while moving farther and farther away, its brightness (in this context often called \surface brightness") doesn't change. It gets smaller but not dimmer (per unit apparent size) ...
... Note that since N is conserved (Liouville) and E is constant for each photon, I is conserved too! If you look at a source while moving farther and farther away, its brightness (in this context often called \surface brightness") doesn't change. It gets smaller but not dimmer (per unit apparent size) ...
January 2005
... The asteroids, named Spirit and Opportunity after NASA’s Mars Exploration Rovers, were discovered on Sept. 24, 1960 by Ingrid van Houten-Groeneveld, Cees J. van Houten, and Tom Gehrels. The trio spotted the moving masses of rock on photographic plates of the night sky taken with telescopes at Caltec ...
... The asteroids, named Spirit and Opportunity after NASA’s Mars Exploration Rovers, were discovered on Sept. 24, 1960 by Ingrid van Houten-Groeneveld, Cees J. van Houten, and Tom Gehrels. The trio spotted the moving masses of rock on photographic plates of the night sky taken with telescopes at Caltec ...
Stellar Evolution: The Live and Death of a Star
... It continues to spread out over time, and eventually disperses into interstellar space, enriching it with atoms of helium, carbon, oxygen & heavier elements • These elements eventually get swept up into nebulae (see ch. 18) and formed into new stars and planets ...
... It continues to spread out over time, and eventually disperses into interstellar space, enriching it with atoms of helium, carbon, oxygen & heavier elements • These elements eventually get swept up into nebulae (see ch. 18) and formed into new stars and planets ...
Carrier plasma shift in GaInAsP photonic crystal point defect cavity
... Spectra near l ¼ 1.536 mm under such light irradiation are shown in Fig. 3b and c. The resonant peak blue-shifted by <1 nm for an absorbed power of 13 mW and 5.6 nm for 850 mW. Considering the surface recombination at airholes [7] and assuming a carrier lifetime of 4 ns, a pump power of 850 mW corre ...
... Spectra near l ¼ 1.536 mm under such light irradiation are shown in Fig. 3b and c. The resonant peak blue-shifted by <1 nm for an absorbed power of 13 mW and 5.6 nm for 850 mW. Considering the surface recombination at airholes [7] and assuming a carrier lifetime of 4 ns, a pump power of 850 mW corre ...
Weaknesses in Gravity and Cosmology Theories-19-06-11
... that the velocity of the stars is fairly constant, beginning at a distance of 2 kpc. The centre of the bulge has no specific (average) velocity, which result in a zero velocity in the figure. The first part of the disk outside the bulge, at nearly 2,5 kpc has often got a some higher velocity. And ov ...
... that the velocity of the stars is fairly constant, beginning at a distance of 2 kpc. The centre of the bulge has no specific (average) velocity, which result in a zero velocity in the figure. The first part of the disk outside the bulge, at nearly 2,5 kpc has often got a some higher velocity. And ov ...
Origin of Planetary Systems
... Nebula, showing a large column of interstellar gas. The two images of this cluster, which is roughly 1300 light years from us, were captured by two different cameras connected to the Hubble Space Telescope. (a) In this image taken at visible light (the same light that our eyes perceive), we can see ...
... Nebula, showing a large column of interstellar gas. The two images of this cluster, which is roughly 1300 light years from us, were captured by two different cameras connected to the Hubble Space Telescope. (a) In this image taken at visible light (the same light that our eyes perceive), we can see ...
Properties of Light
... reactions. Gas in clusters of galaxies; supernova remnants; solar corona. Supernova remnants; very hot stars. Stars ...
... reactions. Gas in clusters of galaxies; supernova remnants; solar corona. Supernova remnants; very hot stars. Stars ...
Discussion Session A: “Evidence”
... • A) Correla8ons between nuclear SFR and instantaneous LAGN • B) Correla8on of SFR and average LAGN (or BH accre8on rate) • C) Increased AGN frac'on in SF galaxies • D) Radio AGN are associated ...
... • A) Correla8ons between nuclear SFR and instantaneous LAGN • B) Correla8on of SFR and average LAGN (or BH accre8on rate) • C) Increased AGN frac'on in SF galaxies • D) Radio AGN are associated ...
From Big Bang to Biospheres: The Scope and Limits of Explanation
... (iv) The stars then assemble into galaxies. Fusion processes within the stars synthesis the periodic table from pristine hydrogen. Short-lived stars of high mass end their lives as supernovae, and fling this processed material back into space. Second-generation stars (our Sun among them) condense fr ...
... (iv) The stars then assemble into galaxies. Fusion processes within the stars synthesis the periodic table from pristine hydrogen. Short-lived stars of high mass end their lives as supernovae, and fling this processed material back into space. Second-generation stars (our Sun among them) condense fr ...
Synchrotron Radiation: Examples
... Large extragalactic jets have an enormous amount of particle energy as It is, so putting more energy into particles makes theory more difficult ...
... Large extragalactic jets have an enormous amount of particle energy as It is, so putting more energy into particles makes theory more difficult ...
슬라이드 1
... using NYU value-added galaxy catalog (Blanton et al. 2005) based on SDSS DR7 and GALEX GR4/5 (Martin et al 2005). We have used the galaxy morphological classification scheme invented by Park & Choi (2005). 91,752 galaxies in total and 35,147 early-types (~38%) ...
... using NYU value-added galaxy catalog (Blanton et al. 2005) based on SDSS DR7 and GALEX GR4/5 (Martin et al 2005). We have used the galaxy morphological classification scheme invented by Park & Choi (2005). 91,752 galaxies in total and 35,147 early-types (~38%) ...
Linking Asteroids and Meteorites through Reflectance
... • Event Horizon is the boundary between the inside and outside of the Black Hole • Within the Event Horizon, the escape velocity is greater than the speed of light ...
... • Event Horizon is the boundary between the inside and outside of the Black Hole • Within the Event Horizon, the escape velocity is greater than the speed of light ...
Weighing a Galaxy—31 Oct Test 2 Ast 207 F2005 Oct-08
... Under influence of the gravity of a mass, a test object moves a given distance. If the time is short, the mass is greater. Alien astronomers want to measure the mass of the sun using the Doppler effect of light emitted by Jupiter. If the mass of the sun is greater, they would measure a shift in wave ...
... Under influence of the gravity of a mass, a test object moves a given distance. If the time is short, the mass is greater. Alien astronomers want to measure the mass of the sun using the Doppler effect of light emitted by Jupiter. If the mass of the sun is greater, they would measure a shift in wave ...
The first stars, as seen by supercomputers
... technique.2 The technique was not novel in and of itself—the engineering and aerodynamics literature of the 1980s includes discussions of adaptive meshes—but the application to first-star formation required a much enhanced dynamic range.3 Simulations employing an adaptive mesh start with as large a ...
... technique.2 The technique was not novel in and of itself—the engineering and aerodynamics literature of the 1980s includes discussions of adaptive meshes—but the application to first-star formation required a much enhanced dynamic range.3 Simulations employing an adaptive mesh start with as large a ...
Physical Cosmology
... • At z <~ 20 the “first” star (clusters)/small galaxies form. • At z ~ 6-10 these gradually photo-ionize the hydrogen in the IGM (“Reionization”). • At z<6 galaxies form most of their stars and grow by merging. • At z<1 massive galaxy clusters are assembled. ...
... • At z <~ 20 the “first” star (clusters)/small galaxies form. • At z ~ 6-10 these gradually photo-ionize the hydrogen in the IGM (“Reionization”). • At z<6 galaxies form most of their stars and grow by merging. • At z<1 massive galaxy clusters are assembled. ...
el-1
... Light in transparent media Glass and other transparent media transmit light, which travels at different speeds inside of various materials (media). The speed is given in terms of a parameter called the refractive index, denoted by n, of the medium. The wavelength of a light wave inside a medium als ...
... Light in transparent media Glass and other transparent media transmit light, which travels at different speeds inside of various materials (media). The speed is given in terms of a parameter called the refractive index, denoted by n, of the medium. The wavelength of a light wave inside a medium als ...
Lecture notes 1: The human eye
... of the field of view. Weak objects are thus most easily visible with averted vision, ie when it is not looked at directly. In sum with all these effects the eye is usable over a range of illuminations differing by a factor 109 – 1010 . Note that in regions of high contrast the brighter region is oft ...
... of the field of view. Weak objects are thus most easily visible with averted vision, ie when it is not looked at directly. In sum with all these effects the eye is usable over a range of illuminations differing by a factor 109 – 1010 . Note that in regions of high contrast the brighter region is oft ...
Stellar Evolution II
... Larger clouds of gas (GMCs) tend to fragment into smaller ones before collapsing to form stars – very massive stars are rare • Stars with masses above 50 MSUN are unstable – nuclear reactions in their core produce energy at such a fast rate that they blow off their outer layers, losing mass. ...
... Larger clouds of gas (GMCs) tend to fragment into smaller ones before collapsing to form stars – very massive stars are rare • Stars with masses above 50 MSUN are unstable – nuclear reactions in their core produce energy at such a fast rate that they blow off their outer layers, losing mass. ...
Part 1
... can be used to relate the frequency of light () to its wavelength (). Use 3.00 x 108 m/s as an approximation for the speed of light, c. Part 2: Different solutions have different spectral (color) properties depending on the wavelengths of light absorbed by the molecules in the solution. For instan ...
... can be used to relate the frequency of light () to its wavelength (). Use 3.00 x 108 m/s as an approximation for the speed of light, c. Part 2: Different solutions have different spectral (color) properties depending on the wavelengths of light absorbed by the molecules in the solution. For instan ...
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.