Lecture9
... The leftover burned-out (C + O) core of a low-mass star cools and contracts until it becomes a white dwarf (WD) Note: The core temperature is NOT high enough for thermonuclear reaction (using C+O), e.g., C-burning, Oburning, to take place! • No further nuclear reactions take place within the exposed ...
... The leftover burned-out (C + O) core of a low-mass star cools and contracts until it becomes a white dwarf (WD) Note: The core temperature is NOT high enough for thermonuclear reaction (using C+O), e.g., C-burning, Oburning, to take place! • No further nuclear reactions take place within the exposed ...
Evolution and nucleosynthesis of extremely metal
... binary system mass-transfer via wind accretion or Roche-lobe overflow from a star such as that modelled here (which would now be a white dwarf). Subsequent dilution of the accreted material in the envelope of HE 1327-2326 via convection or thermohaline mixing would be expected (Stancliffe & Glebbeek ...
... binary system mass-transfer via wind accretion or Roche-lobe overflow from a star such as that modelled here (which would now be a white dwarf). Subsequent dilution of the accreted material in the envelope of HE 1327-2326 via convection or thermohaline mixing would be expected (Stancliffe & Glebbeek ...
Earth Motions and the Heavens
... constellation Orion just rising above your eastern horizon at 10 PM. One week later at 10 PM this same star will be a) slightly higher in the sky. b) at the same height as before. c) below your horizon. d) setting on your western horizon. ...
... constellation Orion just rising above your eastern horizon at 10 PM. One week later at 10 PM this same star will be a) slightly higher in the sky. b) at the same height as before. c) below your horizon. d) setting on your western horizon. ...
Slide 1 - Arif Solmaz
... Gamma-ray bursts also occur, and were first spotted by satellites looking for violations of nuclear test-ban treaties. This map of where the bursts have been observed shows no “clumping” of bursts anywhere, particularly not within the Milky Way. Therefore, the bursts must originate from outside our ...
... Gamma-ray bursts also occur, and were first spotted by satellites looking for violations of nuclear test-ban treaties. This map of where the bursts have been observed shows no “clumping” of bursts anywhere, particularly not within the Milky Way. Therefore, the bursts must originate from outside our ...
Neutron Stars PowerPoint
... X-Ray Binary Pulsars • Discovered in 1971 by the Uhuru spacecraft – High-energy pulsars are in close binary systems ...
... X-Ray Binary Pulsars • Discovered in 1971 by the Uhuru spacecraft – High-energy pulsars are in close binary systems ...
Neutron Stars PowerPoint
... X-Ray Binary Pulsars • Discovered in 1971 by the Uhuru spacecraft – High-energy pulsars are in close binary systems ...
... X-Ray Binary Pulsars • Discovered in 1971 by the Uhuru spacecraft – High-energy pulsars are in close binary systems ...
CONSTELLATIONS OF THE SOUTHERN SKY VOLANS
... Gamma Volantis is a binary star in Volans, located about 142 light years from the Sun. The system is composed of the primary component, Gamma-2 Volantis, an orange giant with the stellar classification K0III, and Gamma-1 Volantis, a yellow-white main sequence star belonging to the stellar class F2V. ...
... Gamma Volantis is a binary star in Volans, located about 142 light years from the Sun. The system is composed of the primary component, Gamma-2 Volantis, an orange giant with the stellar classification K0III, and Gamma-1 Volantis, a yellow-white main sequence star belonging to the stellar class F2V. ...
The extragalactic universe and distance measurements
... • 1920 – Issue formally debated at the National Academy of Sciences in DC. – Harlow Shapley argued for “local hypothesis” (idea that nebulae were nearby). – Heber Curtis argued for “island universe” hypothesis. ...
... • 1920 – Issue formally debated at the National Academy of Sciences in DC. – Harlow Shapley argued for “local hypothesis” (idea that nebulae were nearby). – Heber Curtis argued for “island universe” hypothesis. ...
two dozen compact sources and a massive disk
... cluster begins to emerge MIR - mm 4. Young cluster cluster has emerged from cloud ...
... cluster begins to emerge MIR - mm 4. Young cluster cluster has emerged from cloud ...
Section 4
... They used a method similar to the one used in studying binary stars. The astronomers observed that a star was moving slightly toward and away from us. They knew that the invisible object causing the movement didn’t have enough mass to be a star. They inferred that it must be a planet. Since then, as ...
... They used a method similar to the one used in studying binary stars. The astronomers observed that a star was moving slightly toward and away from us. They knew that the invisible object causing the movement didn’t have enough mass to be a star. They inferred that it must be a planet. Since then, as ...
MSci Astrophysics 210PHY412
... Which is the more likely ? As light elements are much more abundant in the solar system that heavy ones, we would expect nuclear fusion to be the dominant source. Given the limits on P(r) and T(r) that we have just obtained - are the central ...
... Which is the more likely ? As light elements are much more abundant in the solar system that heavy ones, we would expect nuclear fusion to be the dominant source. Given the limits on P(r) and T(r) that we have just obtained - are the central ...
Sun PPT from class
... generation of the energy in the Sun was gravitational contraction: – as the solar nebula collapses due to the gravitational pull of the denser core region, gravitational potential energy is converted into thermal energy. However, according to calculation, the Sun can sustain its energy output for on ...
... generation of the energy in the Sun was gravitational contraction: – as the solar nebula collapses due to the gravitational pull of the denser core region, gravitational potential energy is converted into thermal energy. However, according to calculation, the Sun can sustain its energy output for on ...
Parallax class activity (in MSword)
... How far away are the stars? Fun with Math! person 1: Measure out some distance X, and stand at point 1. This is like the distance to a star, which in real life we can’t measure with a tape measure!. (If there is time, we will do two distances, one quite short, say 10 feet, and one longer, say 50 fee ...
... How far away are the stars? Fun with Math! person 1: Measure out some distance X, and stand at point 1. This is like the distance to a star, which in real life we can’t measure with a tape measure!. (If there is time, we will do two distances, one quite short, say 10 feet, and one longer, say 50 fee ...
Name: Three Views Spectrum Simulation This simulation uses the
... visible surface of a star. Using colored pencils, recreate in the box below the brightline EMISSION spectrum shown in the spectrometer that arises from a glowing cloud of gas. EMISSION SPECTRUM The EMISSION spectrum is produced in a thin gas where the collisions between atoms are relatively rare. A ...
... visible surface of a star. Using colored pencils, recreate in the box below the brightline EMISSION spectrum shown in the spectrometer that arises from a glowing cloud of gas. EMISSION SPECTRUM The EMISSION spectrum is produced in a thin gas where the collisions between atoms are relatively rare. A ...
Name:
... visible surface of a star. Using colored pencils, recreate in the box below the brightline EMISSION spectrum shown in the spectrometer that arises from a glowing cloud of gas. EMISSION SPECTRUM The EMISSION spectrum is produced in a thin gas where the collisions between atoms are relatively rare. A ...
... visible surface of a star. Using colored pencils, recreate in the box below the brightline EMISSION spectrum shown in the spectrometer that arises from a glowing cloud of gas. EMISSION SPECTRUM The EMISSION spectrum is produced in a thin gas where the collisions between atoms are relatively rare. A ...
plagiarism - things to know - Science Department
... Stars, rocks and people all emit light, and and people included. The temperature of which wavelength of light will be most the star, rock or person determines which strongly radiated depends on the wavelength of light will be most strongly temperature of the star, rock or person. For radiated. In th ...
... Stars, rocks and people all emit light, and and people included. The temperature of which wavelength of light will be most the star, rock or person determines which strongly radiated depends on the wavelength of light will be most strongly temperature of the star, rock or person. For radiated. In th ...
Falling Stars
... who discovered it at the end of 1865.The scientists were not working together; one was in France and one was in America. They were each looking through telescopes. Both astronomers spotted the comet and reported their finding. The comet they found was not a big, bright comet. It is so small that it ...
... who discovered it at the end of 1865.The scientists were not working together; one was in France and one was in America. They were each looking through telescopes. Both astronomers spotted the comet and reported their finding. The comet they found was not a big, bright comet. It is so small that it ...
Westerlund 1 : A Super-Star Cluster within the Milky Way
... How does Wd1 compare to other Super Star Clusters? It is the most massive open cluster observed in the Local Group, but is less massive than SSCs observed in typical starburst galaxies such as M82. ...
... How does Wd1 compare to other Super Star Clusters? It is the most massive open cluster observed in the Local Group, but is less massive than SSCs observed in typical starburst galaxies such as M82. ...
Our Star, the Sun - Solar Physics and Space Weather
... the solar wind of the Sun’s atmosphere • Corona is made of very high-temperature gases at extremely low density • It extends to several million Km • Because of hot temperature, it expands into the outer space forming solar wind ...
... the solar wind of the Sun’s atmosphere • Corona is made of very high-temperature gases at extremely low density • It extends to several million Km • Because of hot temperature, it expands into the outer space forming solar wind ...
In This Issue The Hottest Planet in the Solar System President`s Article
... Earth to complete exactly one full rotation on its axis (using a distant star … not our sun … as a way to measure when the rotation is completed.) But in that same amount of time, the Earth will have moved forward in its approximately 365¼ day orbit around the Sun — by just shy of 1º. This means the ...
... Earth to complete exactly one full rotation on its axis (using a distant star … not our sun … as a way to measure when the rotation is completed.) But in that same amount of time, the Earth will have moved forward in its approximately 365¼ day orbit around the Sun — by just shy of 1º. This means the ...
The Sun: Our Star
... Earth’s temperature by 1-2 degrees Random variation ~0.1% over days or weeks Long-term, cyclical variation 0.018% per year (period longer than the 22 years of the sunspots) Small random fluctuations do not affect Earth’s climate ...
... Earth’s temperature by 1-2 degrees Random variation ~0.1% over days or weeks Long-term, cyclical variation 0.018% per year (period longer than the 22 years of the sunspots) Small random fluctuations do not affect Earth’s climate ...
Chapter 15, Galaxies
... Because the mass of white dwarfs when they explode as supernovae is always around 1.0 M⊙, its luminosity is very consistent, and can be used as a standard candle for the measurement of distance to distant galaxies (Chapter 15). The amount of energy produced by white dwarf supernovae and massive star ...
... Because the mass of white dwarfs when they explode as supernovae is always around 1.0 M⊙, its luminosity is very consistent, and can be used as a standard candle for the measurement of distance to distant galaxies (Chapter 15). The amount of energy produced by white dwarf supernovae and massive star ...
The Origin of Oxygen Isotopic Anomalies Seen in Primitive Meteorites
... – distinguishes fractionation from nuclear sources of isotopic enrichment – almost linearly proportional to the differences in mass between the isotopes Ex: a chemical process that produces a factor of x change in the 17O/16O ratio produces a factor of 2x change in the 18O/16O – so if you plot (1 ...
... – distinguishes fractionation from nuclear sources of isotopic enrichment – almost linearly proportional to the differences in mass between the isotopes Ex: a chemical process that produces a factor of x change in the 17O/16O ratio produces a factor of 2x change in the 18O/16O – so if you plot (1 ...
IK Pegasi
IK Pegasi (or HR 8210) is a binary star system in the constellation Pegasus. It is just luminous enough to be seen with the unaided eye, at a distance of about 150 light years from the Solar System.The primary (IK Pegasi A) is an A-type main-sequence star that displays minor pulsations in luminosity. It is categorized as a Delta Scuti variable star and it has a periodic cycle of luminosity variation that repeats itself about 22.9 times per day. Its companion (IK Pegasi B) is a massive white dwarf—a star that has evolved past the main sequence and is no longer generating energy through nuclear fusion. They orbit each other every 21.7 days with an average separation of about 31 million kilometres, or 19 million miles, or 0.21 astronomical units (AU). This is smaller than the orbit of Mercury around the Sun.IK Pegasi B is the nearest known supernova progenitor candidate. When the primary begins to evolve into a red giant, it is expected to grow to a radius where the white dwarf can accrete matter from the expanded gaseous envelope. When the white dwarf approaches the Chandrasekhar limit of 1.44 solar masses (M☉), it may explode as a Type Ia supernova.