The Sun The Sun is a very typical main sequence star. It contains 100
... Convec9on occurs because the gas becomes increasingly opaque to radia9on as the temperature decreases and atomic nuclei begin to recombine with electrons. A simple picture of convec9on imagines a local el ...
... Convec9on occurs because the gas becomes increasingly opaque to radia9on as the temperature decreases and atomic nuclei begin to recombine with electrons. A simple picture of convec9on imagines a local el ...
PRINCIPAL COMPONENT ANALYSIS OF VARIABLE STAR LIGHT
... NSF Office of International Science and Engineering award number 1065093 ...
... NSF Office of International Science and Engineering award number 1065093 ...
Background Information on Galaxy Classification
... probably so many dwarf galaxies that their combined mass probably exceeds that of all the larger galaxies taken together. But their small size and dimness make them hard to detect and we have only been able to discover them when they are relatively nearby. Hubble based his classification scheme sole ...
... probably so many dwarf galaxies that their combined mass probably exceeds that of all the larger galaxies taken together. But their small size and dimness make them hard to detect and we have only been able to discover them when they are relatively nearby. Hubble based his classification scheme sole ...
MASS – LUMINOSITY RELATION FOR MASSIVE STARS
... stellar luminosity is reduced as well. For this reason the mass luminosity relation (equations s2.7, s2.8, and s2.9) gives un upper limit to the luminosity of stars approximated with the Eddington ...
... stellar luminosity is reduced as well. For this reason the mass luminosity relation (equations s2.7, s2.8, and s2.9) gives un upper limit to the luminosity of stars approximated with the Eddington ...
HW7-3
... (260) RQ 3: What is a brown dwarf? A brown dwarf is a “failed star.” They are balls of gas without fusion. The upper end of brown dwarfs is well defined: 8% M☉ = 80 Jupiters. There is a not-so-welldefined line between small brown dwarfs and large planets. (260) RQ 6: Why do expanding stars become co ...
... (260) RQ 3: What is a brown dwarf? A brown dwarf is a “failed star.” They are balls of gas without fusion. The upper end of brown dwarfs is well defined: 8% M☉ = 80 Jupiters. There is a not-so-welldefined line between small brown dwarfs and large planets. (260) RQ 6: Why do expanding stars become co ...
Slide 1
... like ours develop. Stars less than one solar mass are so dim so that planets should be very close. They will then behave like our Moon in synchronous rotation showing one face to the star, the other face in frigid darkness. Conclusion: we need solar-like stars and the estimation of the Astronomer is ...
... like ours develop. Stars less than one solar mass are so dim so that planets should be very close. They will then behave like our Moon in synchronous rotation showing one face to the star, the other face in frigid darkness. Conclusion: we need solar-like stars and the estimation of the Astronomer is ...
Weighing the universe—6 Dec AST207 F2010 12/6/2010
... • A Type II supernova is a massive star that explodes when it runs out of fuel and pressure is insufficient to counter gravity. • A Type I supernova is a white dwarf that explodes. – A WD and giant orbit each other. – Mass moves from the giant to the WD. – WD explodes when it gets so much mass f ...
... • A Type II supernova is a massive star that explodes when it runs out of fuel and pressure is insufficient to counter gravity. • A Type I supernova is a white dwarf that explodes. – A WD and giant orbit each other. – Mass moves from the giant to the WD. – WD explodes when it gets so much mass f ...
Notes on Quantum Theory
... (Note that each photon releases a tiny “pulse” of light, but with so many emissions each second, the resulting light would appear “continuous”.) The Photoelectric Effect In the above example, matter (consisting of large numbers of atoms) gives off light as a result of absorbing energy. It turns out ...
... (Note that each photon releases a tiny “pulse” of light, but with so many emissions each second, the resulting light would appear “continuous”.) The Photoelectric Effect In the above example, matter (consisting of large numbers of atoms) gives off light as a result of absorbing energy. It turns out ...
Chemical Evolution of the Galaxy and its satellites
... • The SFR is the star formation rate (how many solar masses go into stars per unit time) • The IMF is the initial stellar mass function describing the distribution of stars as a function of stellar mass ...
... • The SFR is the star formation rate (how many solar masses go into stars per unit time) • The IMF is the initial stellar mass function describing the distribution of stars as a function of stellar mass ...
Midterm Exam - 2 Set B Solution
... b.) If the self inductance of the coil is 300 mH find (i) the rate at which induced current changes in the loop and (ii) the direction (clockwise/anticlockwise) of the induced current. (7+3s points) SOLN: a.) The emf induced in the loop is ...
... b.) If the self inductance of the coil is 300 mH find (i) the rate at which induced current changes in the loop and (ii) the direction (clockwise/anticlockwise) of the induced current. (7+3s points) SOLN: a.) The emf induced in the loop is ...
Cosmic scaffolding and the growth of structure
... missions in space. Various problems encountered, but all HST-specific and none generic to space. Know what needs to be done better! Comparison of the large-scale distribution of baryons to that of mass, which could not have been done from the ground. In general, mass traces light - consistent with a ...
... missions in space. Various problems encountered, but all HST-specific and none generic to space. Know what needs to be done better! Comparison of the large-scale distribution of baryons to that of mass, which could not have been done from the ground. In general, mass traces light - consistent with a ...
The Milky Way
... A. Star Birth in Giant Molecular Clouds B. Heating By Contraction C. Protostars II. The Orion Nebula: Evidence of Star Formation A. Observing Star Formation B. Contagious Star Formation III. Young Stellar Objects and Protostellar Disks ...
... A. Star Birth in Giant Molecular Clouds B. Heating By Contraction C. Protostars II. The Orion Nebula: Evidence of Star Formation A. Observing Star Formation B. Contagious Star Formation III. Young Stellar Objects and Protostellar Disks ...
The Milky Way - Houston Community College System
... A. Star Birth in Giant Molecular Clouds B. Heating By Contraction C. Protostars II. The Orion Nebula: Evidence of Star Formation A. Observing Star Formation B. Contagious Star Formation III. Young Stellar Objects and Protostellar Disks ...
... A. Star Birth in Giant Molecular Clouds B. Heating By Contraction C. Protostars II. The Orion Nebula: Evidence of Star Formation A. Observing Star Formation B. Contagious Star Formation III. Young Stellar Objects and Protostellar Disks ...
Document
... • According to the densitywave theory, spiral arms are created by density waves that sweep around the Galaxy • The gravitational field of this spiral pattern compresses the interstellar clouds through which it passes, thereby triggering the formation of the OB associations and H II regions that illu ...
... • According to the densitywave theory, spiral arms are created by density waves that sweep around the Galaxy • The gravitational field of this spiral pattern compresses the interstellar clouds through which it passes, thereby triggering the formation of the OB associations and H II regions that illu ...
9binary1i
... Problems with Binaries Period and Separation In order to resolve the stars they have to have a large separation, but his also means a long period ...
... Problems with Binaries Period and Separation In order to resolve the stars they have to have a large separation, but his also means a long period ...
Characterisation of the Tunable Laser Source
... Fabry-Perot interferometers. The Fabry-Perot interferometer, shown in figure 2, consists of two highly reflective, parallel mirrors that act as a resonant cavity, which filters the incoming light. The resolution of Fabry-Perot interferometer-based optical spectrum analyzers, dependent on the reflect ...
... Fabry-Perot interferometers. The Fabry-Perot interferometer, shown in figure 2, consists of two highly reflective, parallel mirrors that act as a resonant cavity, which filters the incoming light. The resolution of Fabry-Perot interferometer-based optical spectrum analyzers, dependent on the reflect ...
Why is there a main sequence?
... shell around the core He Core + H-burning shell produce more energy than needed for pressure support Expansion and cooling of the outer layers of the star Red ...
... shell around the core He Core + H-burning shell produce more energy than needed for pressure support Expansion and cooling of the outer layers of the star Red ...
chap17_f03_phints
... A star is determined to have a surface temperature twice that of the Sun, and a luminosity 64X greater. What is this star’s radius, expressed in solar units ? HINT: Problem 4 is an application of the radius – luminosity – temperature relation for stars. Given two of these values, the third is found ...
... A star is determined to have a surface temperature twice that of the Sun, and a luminosity 64X greater. What is this star’s radius, expressed in solar units ? HINT: Problem 4 is an application of the radius – luminosity – temperature relation for stars. Given two of these values, the third is found ...
Supernova
... • The photons are energetic enough to break up iron nuclei. • The particles from the broken nuclei fuse with iron to create heavy elements. • This matter goes to form new stars and planets. ...
... • The photons are energetic enough to break up iron nuclei. • The particles from the broken nuclei fuse with iron to create heavy elements. • This matter goes to form new stars and planets. ...
The Celestial Sphere - Department of Physics and Astronomy
... D (pc) = 1/0.001 arcsec D = 1000 pc (3260 ly) The Hubble Space Telescope can measure parallaxes to 0.0005 arcsec, or D = 2000 pc (6520 ly) ...
... D (pc) = 1/0.001 arcsec D = 1000 pc (3260 ly) The Hubble Space Telescope can measure parallaxes to 0.0005 arcsec, or D = 2000 pc (6520 ly) ...
UNIT 4 - Galaxies XIV. The Milky Way A. Structure
... radio sources with star-like visible objects - quasi-stellar radio sources (quasars) unusual spectrum - lines are redshifted cannot be stars - redshift indicates that these objects are very distant (from the early universe) their great distance implies these are the brightest objects known in the un ...
... radio sources with star-like visible objects - quasi-stellar radio sources (quasars) unusual spectrum - lines are redshifted cannot be stars - redshift indicates that these objects are very distant (from the early universe) their great distance implies these are the brightest objects known in the un ...
Coming Home - Marcia Bartusiak
... now realize that the bright, visible nebulas are mere blis ters on the sides of huge, in visible molecular clouds that spawn clusters of stars. Each new generation of stars digs ever deeper into the dark cloud, kindling a wave of star formation that surges through the cloud like the successive bur ...
... now realize that the bright, visible nebulas are mere blis ters on the sides of huge, in visible molecular clouds that spawn clusters of stars. Each new generation of stars digs ever deeper into the dark cloud, kindling a wave of star formation that surges through the cloud like the successive bur ...
5-ESS1 Earth`s Place in the Universe
... Analyzing data in 3–5 builds on K–2 experiences and progresses to introducing quantitative approaches to collecting data and conducting multiple trials of qualitative observations. When possible and feasible, digital tools should be used. Represent data in graphical displays (bar graphs, pictograp ...
... Analyzing data in 3–5 builds on K–2 experiences and progresses to introducing quantitative approaches to collecting data and conducting multiple trials of qualitative observations. When possible and feasible, digital tools should be used. Represent data in graphical displays (bar graphs, pictograp ...
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.