Power-point slides for Lecture 1
... Based upon 75 supernovae. 1 SNu == one supernova per century per 1010 solar luminosities for the host galaxy in the blue band. h ~ 0.7. The Milky Way is an Sb or Sbc galaxy. ...
... Based upon 75 supernovae. 1 SNu == one supernova per century per 1010 solar luminosities for the host galaxy in the blue band. h ~ 0.7. The Milky Way is an Sb or Sbc galaxy. ...
Week 5 - OSU Astronomy
... The solar neutrino problem • Rate of detection was 1/3 that predicted by standard models of the sun • What was going on? • This was one of the major research problems in astrophysics • A solution has emerged in the last few years ...
... The solar neutrino problem • Rate of detection was 1/3 that predicted by standard models of the sun • What was going on? • This was one of the major research problems in astrophysics • A solution has emerged in the last few years ...
Energy Production in Stars
... temperature of the sun (19 10' degrees'). At lower temperatures (1) will predominate, at higher temperatures, (2). No reaction other than (1) or (2) will give an appreciable contribution to the energy production at temperatures around 20 10' degrees such as are found in the interior of ordinary star ...
... temperature of the sun (19 10' degrees'). At lower temperatures (1) will predominate, at higher temperatures, (2). No reaction other than (1) or (2) will give an appreciable contribution to the energy production at temperatures around 20 10' degrees such as are found in the interior of ordinary star ...
supplemental materials.
... evolution. For white dwarfs, however, energy transport is dominated by conduction which changes the implementation of the numerical solution. We use the white dwarf evolution models of Wood (1992) and the white dwarf atmosphere models of Bergeron et al. (1995) to convert the surface luminosity and t ...
... evolution. For white dwarfs, however, energy transport is dominated by conduction which changes the implementation of the numerical solution. We use the white dwarf evolution models of Wood (1992) and the white dwarf atmosphere models of Bergeron et al. (1995) to convert the surface luminosity and t ...
Studying the Metallicities of Dwarf Galaxies Myles McKay (SCSU)
... NO DEFINITION! Milky Way Galaxy ...
... NO DEFINITION! Milky Way Galaxy ...
White Dwarf Stars After nuclear burning ceases, a post
... This simple cooling law reproduces the observed distribution of white dwarfs quite well. The cooling timescale derived above is a factor of ∼ 2 too fast (which probably comes from our definition of the transition region). However, the behavior of the cooling curve, and its position in the HR diagr ...
... This simple cooling law reproduces the observed distribution of white dwarfs quite well. The cooling timescale derived above is a factor of ∼ 2 too fast (which probably comes from our definition of the transition region). However, the behavior of the cooling curve, and its position in the HR diagr ...
Introduction - Cambridge University Press
... burning; that is left for Chapter 3. We begin by considering the question of just what we mean by ‘a star’. The starting point for the formation of a star is a cloud of cold gas, composed primarily of hydrogen and helium, with traces of heavier elements (usually referred to as metals). The cloud col ...
... burning; that is left for Chapter 3. We begin by considering the question of just what we mean by ‘a star’. The starting point for the formation of a star is a cloud of cold gas, composed primarily of hydrogen and helium, with traces of heavier elements (usually referred to as metals). The cloud col ...
Slide 1
... ConcepTest #3: A dipole has charges +q and –q separated by some distance. The dipole sits in a uniform electric field that points to the right. What is the direction of the net force acting on the dipole? ...
... ConcepTest #3: A dipole has charges +q and –q separated by some distance. The dipole sits in a uniform electric field that points to the right. What is the direction of the net force acting on the dipole? ...
Chapter 15: The Deaths of Massive Stars
... Advancing the Model: Nucleosynthesis 1. Only hydrogen, helium, and lithium, the very lightest elements, were present in the very early universe. Heavier elements up through iron were produced inside stars through nuclear fusion reactions 2. Elements heavier than iron are created in a process called ...
... Advancing the Model: Nucleosynthesis 1. Only hydrogen, helium, and lithium, the very lightest elements, were present in the very early universe. Heavier elements up through iron were produced inside stars through nuclear fusion reactions 2. Elements heavier than iron are created in a process called ...
Linking Asteroids and Meteorites through Reflectance
... • Gravity shrinks the inert helium core and surrounding shell of hydrogen • The shell of hydrogen becomes hot for fusion • This is called hydrogen-shell burning ...
... • Gravity shrinks the inert helium core and surrounding shell of hydrogen • The shell of hydrogen becomes hot for fusion • This is called hydrogen-shell burning ...
Dark matter
... Only 20% of the dark matter is MACHOs: Some of the dark matter in galaxy “halos” consists of exotic matter. Suppose there existed a type of massive elementary particle that didn’t absorb, emit, or scatter photons. We’d detect such a particle only by its gravitational pull on luminous matter. ...
... Only 20% of the dark matter is MACHOs: Some of the dark matter in galaxy “halos” consists of exotic matter. Suppose there existed a type of massive elementary particle that didn’t absorb, emit, or scatter photons. We’d detect such a particle only by its gravitational pull on luminous matter. ...
SUMMARY White dwarfs, neutron stars, and black holes are the
... must be less than the Chandrasekhar limit or it collapses. Having no fuel supply, a white dwarf gradually cools and dims. If a white dwarf is in a binary system, it may accrete mass from its neighbor and explode either as a nova or as a type Ia supernova. A neutron star forms when a massive star's i ...
... must be less than the Chandrasekhar limit or it collapses. Having no fuel supply, a white dwarf gradually cools and dims. If a white dwarf is in a binary system, it may accrete mass from its neighbor and explode either as a nova or as a type Ia supernova. A neutron star forms when a massive star's i ...
1 Origin of the Elements. Isotopes and Atomic Weights
... more rapidly it consumes its nuclear fuel. Further catastrophic changes may then occur which result in much of the stellar material being ejected into space, where it becomes incorporated together with further hydrogen and helium in the next generation of stars. It should be noted, however, that, as ...
... more rapidly it consumes its nuclear fuel. Further catastrophic changes may then occur which result in much of the stellar material being ejected into space, where it becomes incorporated together with further hydrogen and helium in the next generation of stars. It should be noted, however, that, as ...
fall semester review
... The small star will start out in the main sequence and as it ages it will expand. After becoming a red giant only the core will remain and it will be a white dwarf. The small star will never explode or become super large in size like the massive star. ...
... The small star will start out in the main sequence and as it ages it will expand. After becoming a red giant only the core will remain and it will be a white dwarf. The small star will never explode or become super large in size like the massive star. ...
PowerPoint 프레젠테이션
... Maximum NS mass can be any value within 1.5~1.8 Msun as far as supercritical accretion is concerned unseen “NS+LMBH” are 5 times more dominant than seen “NS+NS” system. “NS+LMBH” system may increase LIGO detection rate by factor of about 10. Possibilities of investigating NS inner structure vi ...
... Maximum NS mass can be any value within 1.5~1.8 Msun as far as supercritical accretion is concerned unseen “NS+LMBH” are 5 times more dominant than seen “NS+NS” system. “NS+LMBH” system may increase LIGO detection rate by factor of about 10. Possibilities of investigating NS inner structure vi ...
South Pasadena • Chemistry Name 8 • Nuclear Chemistry Period
... 1. What chemical element is the primary constituent of a young star? 2. Name the astrophysicist who first advanced the idea that the chemical elements originated from hydrogen in stars. 3. Name the stellar process in which the fusion of hydrogen produces other elements. 4. Why is iron the heaviest e ...
... 1. What chemical element is the primary constituent of a young star? 2. Name the astrophysicist who first advanced the idea that the chemical elements originated from hydrogen in stars. 3. Name the stellar process in which the fusion of hydrogen produces other elements. 4. Why is iron the heaviest e ...
Abundance of Elements
... Signitures of Nucleosynthesis C) a-elements : C, N, O, Ne, Mg, & Si ; tightly bound, thermodynamically-favored ...
... Signitures of Nucleosynthesis C) a-elements : C, N, O, Ne, Mg, & Si ; tightly bound, thermodynamically-favored ...
Stars & Galaxies
... Their outer layers expand to become red giants. Eventually, the outer parts grow bigger still and drift out into space. The blue white hot core is left behind causing a white dwarf. When there is no more energy it becomes a black dwarf. ...
... Their outer layers expand to become red giants. Eventually, the outer parts grow bigger still and drift out into space. The blue white hot core is left behind causing a white dwarf. When there is no more energy it becomes a black dwarf. ...
MS PowerPoint - Catalysis Eprints database
... turns out that HA feels the presence of HB. Recall that these protons are tiny little magnets, that can be oriented either with or against the magnetic field of the NMR machine. When the field created by HB reinforces the magnetic field of the NMR machine (B0 ) HA feels a slightly stronger field, bu ...
... turns out that HA feels the presence of HB. Recall that these protons are tiny little magnets, that can be oriented either with or against the magnetic field of the NMR machine. When the field created by HB reinforces the magnetic field of the NMR machine (B0 ) HA feels a slightly stronger field, bu ...
P-nuclei
p-Nuclei (p stands for proton-rich) are certain proton-rich, naturally occurring isotopes of some elements between selenium and mercury which cannot be produced in either s- or r-process.