Ay123 Fall 2011 STELLAR STRUCTURE AND EVOLUTION Problem Set 1
... e. Write down an explicit expression for the total gravitational potential energy of this toy star, and verify that the virial theorem is exactly satisfied. Be sure to discuss matter with a general equation of state, not just an ideal monatomic nonrelativistic gas. 2. The Kelvin-Helmholtz timescale: ...
... e. Write down an explicit expression for the total gravitational potential energy of this toy star, and verify that the virial theorem is exactly satisfied. Be sure to discuss matter with a general equation of state, not just an ideal monatomic nonrelativistic gas. 2. The Kelvin-Helmholtz timescale: ...
Chapter 20 (Answers are all A`s) 1. Find the displacement of a
... Formula: asinθp = pλ 5. Light from a He-Ne laser of wavelength 633 nm passes through a circular aperture. It is observed on a screen 4.0 m behind the aperture. The width of the central maximum is 5.4 cm. What is the diameter of the hole? A) 110 µm B) 2.0 µm C) 6600 µm D) 960 µm Formula: asinθp = 1.2 ...
... Formula: asinθp = pλ 5. Light from a He-Ne laser of wavelength 633 nm passes through a circular aperture. It is observed on a screen 4.0 m behind the aperture. The width of the central maximum is 5.4 cm. What is the diameter of the hole? A) 110 µm B) 2.0 µm C) 6600 µm D) 960 µm Formula: asinθp = 1.2 ...
The Universe
... astronomy. It is also a favorable portion of the spectrum for observing ionized H II regions, and for examining the distribution of dusty arms. The dust present in the interstellar medium is opaque to visual light. It is more transparent to far-infrared, which can be used to observe the interior reg ...
... astronomy. It is also a favorable portion of the spectrum for observing ionized H II regions, and for examining the distribution of dusty arms. The dust present in the interstellar medium is opaque to visual light. It is more transparent to far-infrared, which can be used to observe the interior reg ...
The Universe
... astronomy. It is also a favorable portion of the spectrum for observing ionized H II regions, and for examining the distribution of dusty arms. The dust present in the interstellar medium is opaque to visual light. It is more transparent to far-infrared, which can be used to observe the interior reg ...
... astronomy. It is also a favorable portion of the spectrum for observing ionized H II regions, and for examining the distribution of dusty arms. The dust present in the interstellar medium is opaque to visual light. It is more transparent to far-infrared, which can be used to observe the interior reg ...
Ancient Astronomy - Mrs. Petersen`s Earth Science
... to do it automatically. The delay caused by the probe requesting instructions from Earth and getting commands back might be nearly an hour, plenty of time for the probe to crash. The delay caused by the speed of light can sometimes be noticed here on Earth during telephone calls. Long distance calls ...
... to do it automatically. The delay caused by the probe requesting instructions from Earth and getting commands back might be nearly an hour, plenty of time for the probe to crash. The delay caused by the speed of light can sometimes be noticed here on Earth during telephone calls. Long distance calls ...
Stellar Evolution
... Occurs because the zone of hydrogen fusion continually moves outward When all the hydrogen is consumed, the core no longer has outward pressure supporting it, and will contract The core will grow hotter, the heat is radiated outward and expands the surface As the surface expands, it cools down, prod ...
... Occurs because the zone of hydrogen fusion continually moves outward When all the hydrogen is consumed, the core no longer has outward pressure supporting it, and will contract The core will grow hotter, the heat is radiated outward and expands the surface As the surface expands, it cools down, prod ...
Objectives for grade E - Particle and Astroparticle Physics
... Light travels through empty space at a speed of 300,000 km/s • In 1676, Danish astronomer ...
... Light travels through empty space at a speed of 300,000 km/s • In 1676, Danish astronomer ...
The Many Faces of the Sun
... Coronal Loops High resolution image of the corona obtained by TRACE satellite. ...
... Coronal Loops High resolution image of the corona obtained by TRACE satellite. ...
parallax in arc seconds
... Proxima Centauri. It is a member of a triple star system called the Alpha Centauri ...
... Proxima Centauri. It is a member of a triple star system called the Alpha Centauri ...
AST 207 Final Exam, Answers 15 December 2010
... Kepler’s 3rd Law. P2=R3/M P=1year/(3e6)1/2 =0.58e-4year=5hour. 5. You are transported back in time to when the universe was 13 million years old and the expansion parameter was 1/100. a. (3 pts.) What was the temperature of the radiation from the Big Bang? (You must show your work.) What has a compa ...
... Kepler’s 3rd Law. P2=R3/M P=1year/(3e6)1/2 =0.58e-4year=5hour. 5. You are transported back in time to when the universe was 13 million years old and the expansion parameter was 1/100. a. (3 pts.) What was the temperature of the radiation from the Big Bang? (You must show your work.) What has a compa ...
PPT file
... Eventually, an intermediate mass star expands into a red giant and sheds much of its material into space It then collapses in on itself and slowly shrinks into a small, dim white dwarf As it cools more, it turns into a black dwarf, a dense, dark body made up mostly of carbon and oxygen ...
... Eventually, an intermediate mass star expands into a red giant and sheds much of its material into space It then collapses in on itself and slowly shrinks into a small, dim white dwarf As it cools more, it turns into a black dwarf, a dense, dark body made up mostly of carbon and oxygen ...
Zinc and chromium abundances in a third
... The finding that the only two abundance measurements available at z < 1 are both well below solar – and quite typical of the sample at z > 1.5 – has caused concerns as to whether DLAs are really unbiased tracers of the chemical evolution history of the universe. Here we report measurements of the ab ...
... The finding that the only two abundance measurements available at z < 1 are both well below solar – and quite typical of the sample at z > 1.5 – has caused concerns as to whether DLAs are really unbiased tracers of the chemical evolution history of the universe. Here we report measurements of the ab ...
Cosmic Survey
... Many people (adults and students alike) are familiar with the names of objects in space, but have an incomplete mental model of where those objects are in space, their relative size and scale, and how they fit into the cosmic scheme of things. Understanding the sizes and distances of celestial objec ...
... Many people (adults and students alike) are familiar with the names of objects in space, but have an incomplete mental model of where those objects are in space, their relative size and scale, and how they fit into the cosmic scheme of things. Understanding the sizes and distances of celestial objec ...
Data Tables - AlmaMiddleSchoolScience
... Name________________________ Date___________ Hour _____ ...
... Name________________________ Date___________ Hour _____ ...
Chapter 4 Arrangement of Electrons in Atoms
... • Ground state: atoms whose electrons are in their ___________ energy level ...
... • Ground state: atoms whose electrons are in their ___________ energy level ...
Homework 4: Special relativity, synchrotron sources
... distribution of the (relativistic) electrons obeys a power-law with a index p = 2.5 [N() ~ p] from min = 100 to max = 104 . (a) Calculate the energy density of the magnetic field [erg/cm3]. (b) Assuming energy equipartition between fields and particles, and that the ratio of ion to electron ene ...
... distribution of the (relativistic) electrons obeys a power-law with a index p = 2.5 [N() ~ p] from min = 100 to max = 104 . (a) Calculate the energy density of the magnetic field [erg/cm3]. (b) Assuming energy equipartition between fields and particles, and that the ratio of ion to electron ene ...
Infrared Spectroscopy_03
... =2 or 3, and their frequencies are less than two or three times the fundamental frequency (=1) because of anharmonicity. Typical energy spacings for vibrational levels are on the order of 10-20 J. from the Bolzmann distribution, it can be shown that at room temperature typically 1% or less of th ...
... =2 or 3, and their frequencies are less than two or three times the fundamental frequency (=1) because of anharmonicity. Typical energy spacings for vibrational levels are on the order of 10-20 J. from the Bolzmann distribution, it can be shown that at room temperature typically 1% or less of th ...
The Family of Stars
... d = 1/p = 1.3 pc = 4.3 LY With ground-based telescopes, we can measure parallaxes p ≥ 0.02 arc sec => d ≤ 50 pc ...
... d = 1/p = 1.3 pc = 4.3 LY With ground-based telescopes, we can measure parallaxes p ≥ 0.02 arc sec => d ≤ 50 pc ...
Introduction to Radio Astronomy
... RF is non-thermal in origin and arises from shock fronts which form as the stellar wind from the Wolf Rayet star collides with the stellar wind of the O-star. Monitoring continuum RF at 3, 6, 13 and 20 cm over a three-month period. Initial results indicate that radio variability is indeed present. ...
... RF is non-thermal in origin and arises from shock fronts which form as the stellar wind from the Wolf Rayet star collides with the stellar wind of the O-star. Monitoring continuum RF at 3, 6, 13 and 20 cm over a three-month period. Initial results indicate that radio variability is indeed present. ...
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.