The Main Sequence
... • How dense can something get? • How strong can the force of gravity be? • What if the escape velocity is faster than light? ...
... • How dense can something get? • How strong can the force of gravity be? • What if the escape velocity is faster than light? ...
Introducing Photochemistry
... these frequencies. A perfect absorber is defined as one which absorbs all the radiation falling on it and, under steady state conditions, emits all frequencies with unit efficiency. Such an absorber is called a black body. When a system is in thermal equilibrium with its environment rates of absorpt ...
... these frequencies. A perfect absorber is defined as one which absorbs all the radiation falling on it and, under steady state conditions, emits all frequencies with unit efficiency. Such an absorber is called a black body. When a system is in thermal equilibrium with its environment rates of absorpt ...
General Relativity Einstein`s Theory of Gravity Paul Woodward
... region ever seen in space. The so-called Lynx arc is 1 million times brighter than the well-known Orion Nebula, a nearby prototypical star-birth region visible with small telescopes. The newly identified super-cluster contains a million blue-white stars that are twice as hot as similar stars in our ...
... region ever seen in space. The so-called Lynx arc is 1 million times brighter than the well-known Orion Nebula, a nearby prototypical star-birth region visible with small telescopes. The newly identified super-cluster contains a million blue-white stars that are twice as hot as similar stars in our ...
Fluorescence Spectroscopy
... energy level of the ground state (10-9 s) • The energy of the emitted photon is lower than that of the incident photons • Emission E i i S Spectrum t ...
... energy level of the ground state (10-9 s) • The energy of the emitted photon is lower than that of the incident photons • Emission E i i S Spectrum t ...
Binary star formation
... Although very common, not obvious how to form binary stars: • Never observed the process happening • Wide range of scales involved in different binaries Possible mechanisms that have been suggested: • Fission - one star splits into two • Capture - one star captures another initially unbound star int ...
... Although very common, not obvious how to form binary stars: • Never observed the process happening • Wide range of scales involved in different binaries Possible mechanisms that have been suggested: • Fission - one star splits into two • Capture - one star captures another initially unbound star int ...
AGN Workshop
... • Is “satellite-ness” the same as “merger-ness”? • More concentrated distribution of subhalos that ...
... • Is “satellite-ness” the same as “merger-ness”? • More concentrated distribution of subhalos that ...
Exploring the Early Universe - Solar Physics and Space Weather
... content increased • At about t = 1 second, temperature fell below 6 X 109 K, electrons and positions annihilated to form low energy gamma-ray photons that can not reverse the process, which further raising the radiation content in the universe • From 1 second to 380,000 years, the universe is domina ...
... content increased • At about t = 1 second, temperature fell below 6 X 109 K, electrons and positions annihilated to form low energy gamma-ray photons that can not reverse the process, which further raising the radiation content in the universe • From 1 second to 380,000 years, the universe is domina ...
Slide 1 - Indiana University Astronomy
... When a neutron star and a black hole orbit each other, the gases sucked off of the neutron star cause what kind of disk around the black hole before disappearing into it? A. Chandrasekhar Disk B. Double Disk C. Funnel Disk D. Accretion Disk ...
... When a neutron star and a black hole orbit each other, the gases sucked off of the neutron star cause what kind of disk around the black hole before disappearing into it? A. Chandrasekhar Disk B. Double Disk C. Funnel Disk D. Accretion Disk ...
Lecture 10: Stellar Evolution
... Role of Mass • A star’s mass determines its entire life story because it determines its core temperature • High-mass stars with >8MSun have short lives, eventually becoming hot enough to make iron, and end in supernova explosions • Low-mass stars with <2MSun have long lives, never become hot e ...
... Role of Mass • A star’s mass determines its entire life story because it determines its core temperature • High-mass stars with >8MSun have short lives, eventually becoming hot enough to make iron, and end in supernova explosions • Low-mass stars with <2MSun have long lives, never become hot e ...
present
... Cassiopeia was the queen of an ancient land. She and her husband, Cepheus, had a daughter named Andromeda. Cassiopeia would always say she was prettier than the sea nymphs. A monster called Cetus was sent to punish her. It was about to eat Andromeda, when Perseus saved her. All five are now constell ...
... Cassiopeia was the queen of an ancient land. She and her husband, Cepheus, had a daughter named Andromeda. Cassiopeia would always say she was prettier than the sea nymphs. A monster called Cetus was sent to punish her. It was about to eat Andromeda, when Perseus saved her. All five are now constell ...
Catch a Star 2016 Title: The lost planet
... Can our young students make deep studies on Astronomy? Can they enter in the rigorous worlds of calculus and physics in an entertaining and fun way also? Yes, we are confident: curiosity born through the fiction, contrasted investigation of possible realities, conducting numerous experiments and lar ...
... Can our young students make deep studies on Astronomy? Can they enter in the rigorous worlds of calculus and physics in an entertaining and fun way also? Yes, we are confident: curiosity born through the fiction, contrasted investigation of possible realities, conducting numerous experiments and lar ...
Wave nature of matter: de Broglie wavelength
... one needs two or more diracting centres such as pinholes, slits or atoms. For diraction to occur the centres must be separated by a distance about the same size as the wavelength. Theoretically, all objects, not just sub-atomic particles, exhibit wave properties according to the de Broglie hypothe ...
... one needs two or more diracting centres such as pinholes, slits or atoms. For diraction to occur the centres must be separated by a distance about the same size as the wavelength. Theoretically, all objects, not just sub-atomic particles, exhibit wave properties according to the de Broglie hypothe ...
The 22 First Magnitude Stars
... • We are on the Earth’s surface • Earth’s radius (4000 mi) is insignificant compared to stellar distances (25 trillion miles to nearest star) • So we can simplify: – move our origin to the center of the Earth – ignore distance and deal only in ...
... • We are on the Earth’s surface • Earth’s radius (4000 mi) is insignificant compared to stellar distances (25 trillion miles to nearest star) • So we can simplify: – move our origin to the center of the Earth – ignore distance and deal only in ...
The behaviour of dark matter associated with 4 bright cluster
... (labelled A in figure 1) was originally identified in Gemini imaging by Carrasco et al. (2010), who also used long-slit Gemini spectroscopy to obtain a redshift z = 0.204. However, our IFU spectroscopy did not confirm this. We instead found only one bright emission line at 835.5 nm, which is not ass ...
... (labelled A in figure 1) was originally identified in Gemini imaging by Carrasco et al. (2010), who also used long-slit Gemini spectroscopy to obtain a redshift z = 0.204. However, our IFU spectroscopy did not confirm this. We instead found only one bright emission line at 835.5 nm, which is not ass ...
Lesson 13 - Oregon State University
... was 76% by mass protons, 24% alpha particles with traces of deuterium, 3He and 7Li. The /n/p ratio is 109/13/87. The relative ratio of p/4He/d/3He/7Li is a sensitive function of the baryon density of the Universe. Chemistry began about 106 years later, when the temperature had fallen to 2000K and t ...
... was 76% by mass protons, 24% alpha particles with traces of deuterium, 3He and 7Li. The /n/p ratio is 109/13/87. The relative ratio of p/4He/d/3He/7Li is a sensitive function of the baryon density of the Universe. Chemistry began about 106 years later, when the temperature had fallen to 2000K and t ...
Lecture 6-1: Schematic Evolution of Stars as seen from the core
... The precise upper mass is not well known but is somewhere between 100 and 300 Mo (Lecture 3-4, slide 22ff). Minimum mass limit is set by minimum temperature required to ignite H (T~3x106 K), which yields M≈0.08 Mo.(see slide ...
... The precise upper mass is not well known but is somewhere between 100 and 300 Mo (Lecture 3-4, slide 22ff). Minimum mass limit is set by minimum temperature required to ignite H (T~3x106 K), which yields M≈0.08 Mo.(see slide ...
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.