Pulsars - Chabot College
... accidentally discovered a pulsing radio source Sharp pulse every 1.3 sec. ~1000 light years away Called it a “pulsar”, but what was it? ...
... accidentally discovered a pulsing radio source Sharp pulse every 1.3 sec. ~1000 light years away Called it a “pulsar”, but what was it? ...
Name
... A) Two 1 kg balls that are 1 meter apart. B) Two bodies each with the mass of the Sun that are one light year apart. C) Two bodies each with the mass of the Earth that are 1 AU apart. D) Two bodies each with the mass of Jupiter that are 10 AU apart. E) Two 100 kg balls that are 1 km apart. 18) Which ...
... A) Two 1 kg balls that are 1 meter apart. B) Two bodies each with the mass of the Sun that are one light year apart. C) Two bodies each with the mass of the Earth that are 1 AU apart. D) Two bodies each with the mass of Jupiter that are 10 AU apart. E) Two 100 kg balls that are 1 km apart. 18) Which ...
Name
... A) Two 1 kg balls that are 1 meter apart. B) Two bodies each with the mass of the Sun that are one light year apart. C) Two bodies each with the mass of the Earth that are 1 AU apart. D) Two bodies each with the mass of Jupiter that are 10 AU apart. E) Two 100 kg balls that are 1 km apart. 18) Which ...
... A) Two 1 kg balls that are 1 meter apart. B) Two bodies each with the mass of the Sun that are one light year apart. C) Two bodies each with the mass of the Earth that are 1 AU apart. D) Two bodies each with the mass of Jupiter that are 10 AU apart. E) Two 100 kg balls that are 1 km apart. 18) Which ...
Name
... A) Two 1 kg balls that are 1 meter apart. B) Two bodies each with the mass of the Sun that are one light year apart. C) Two bodies each with the mass of the Earth that are 1 AU apart. D) Two 100 kg balls that are 1 km apart. E) Two bodies each with the mass of Jupiter that are 10 AU apart. 18) Which ...
... A) Two 1 kg balls that are 1 meter apart. B) Two bodies each with the mass of the Sun that are one light year apart. C) Two bodies each with the mass of the Earth that are 1 AU apart. D) Two 100 kg balls that are 1 km apart. E) Two bodies each with the mass of Jupiter that are 10 AU apart. 18) Which ...
Stars
... Main sequence stars have zones (in radius) that are convective, and zones that are radiative, and the location of these zones depends on the behavior of the opacity, in addition to the other properties of the star. Massive stars, which are those greater than several solar masses, are convective dee ...
... Main sequence stars have zones (in radius) that are convective, and zones that are radiative, and the location of these zones depends on the behavior of the opacity, in addition to the other properties of the star. Massive stars, which are those greater than several solar masses, are convective dee ...
Physics 161 Homework 8 - Solutions Wednesday
... gravitational pressure, and is essentially a huge nucleus. The density of a neutron star is, thus, the density of a nucleus! We can determine the density in two ways, either by determining the density of a nucleus, or by simply dividing the mass of a neutron star by its density (the two results shou ...
... gravitational pressure, and is essentially a huge nucleus. The density of a neutron star is, thus, the density of a nucleus! We can determine the density in two ways, either by determining the density of a nucleus, or by simply dividing the mass of a neutron star by its density (the two results shou ...
Slide 1
... Apparent brightness depends on two variables: Apparent brightness is proportional to the luminosity of the star. Apparent brightness is inversely proportional to the square of the distance between the star and the observer. ...
... Apparent brightness depends on two variables: Apparent brightness is proportional to the luminosity of the star. Apparent brightness is inversely proportional to the square of the distance between the star and the observer. ...
PowerPoint 프레젠테이션
... 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 via Gravitational Waves & Short-hard GRBs ...
... 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 via Gravitational Waves & Short-hard GRBs ...
Chapter 29: Stars - Mr. Pelton Science
... • About 90 percent of stars, including the sun, fall along the main sequence. ...
... • About 90 percent of stars, including the sun, fall along the main sequence. ...
Night Sky Checklist July–August–September Unaided Eye Astronomy
... just outside the Summer Triangle between Cygnus and Aquila. Stars (The stars on the checklist are easily visible to the unaided eye except in the most light polluted parts of cities.) Antares is a red supergiant star estimated to be some 800 times bigger than the sun. It’s bigger than the orbits of ...
... just outside the Summer Triangle between Cygnus and Aquila. Stars (The stars on the checklist are easily visible to the unaided eye except in the most light polluted parts of cities.) Antares is a red supergiant star estimated to be some 800 times bigger than the sun. It’s bigger than the orbits of ...
superbubbles vs super-galactic winds
... thus the detection of the newly processed material at optical frequencies. Furthermore, it is now well understood that it is this hot high pressure gas the one that fills the interior of superbubbles and that drives the outer shock that sweeps and accelerates the surrounding ISM. It has then become ...
... thus the detection of the newly processed material at optical frequencies. Furthermore, it is now well understood that it is this hot high pressure gas the one that fills the interior of superbubbles and that drives the outer shock that sweeps and accelerates the surrounding ISM. It has then become ...
Solutions to the sample problems
... A binary star system consists of two identical stars traveling in circular orbits of radius R around their center-of-mass. Each star travels at a constant speed v. [7 points] (a) What is m, the mass of one of the stars? Express your answer in terms of R, v, and the universal gravitational constant G ...
... A binary star system consists of two identical stars traveling in circular orbits of radius R around their center-of-mass. Each star travels at a constant speed v. [7 points] (a) What is m, the mass of one of the stars? Express your answer in terms of R, v, and the universal gravitational constant G ...
Oort Cloud Evolu on in a Long
... • Sequence of King models, 25 My each for the interval 100-‐500 My, adapted to basic data computed with EMACSS (Alexander & Gieles ...
... • Sequence of King models, 25 My each for the interval 100-‐500 My, adapted to basic data computed with EMACSS (Alexander & Gieles ...
The Properties of Stars
... The blue star (A) is moving away from us, so its spectrum is red-shifted while that of the red star (B) is blue-shifted. When the stars arrive at the points P, Q, R, and S they are moving across our line of sight so we see no redshift. ...
... The blue star (A) is moving away from us, so its spectrum is red-shifted while that of the red star (B) is blue-shifted. When the stars arrive at the points P, Q, R, and S they are moving across our line of sight so we see no redshift. ...
Powerpoint
... “With all reserve we advance the view that a supernova represents the transition of an ordinary star into a neutron star consisting mainly of neutrons. Such a star may possess a very small radius and an extremely high density. As neutrons can be packed much more closely than ordinary nuclei and elec ...
... “With all reserve we advance the view that a supernova represents the transition of an ordinary star into a neutron star consisting mainly of neutrons. Such a star may possess a very small radius and an extremely high density. As neutrons can be packed much more closely than ordinary nuclei and elec ...
title of lesson plan - Discovery Education
... A measure of the amount of material an object contains, which causes it to have weight in a gravitational field. Context: The more mass a body has, the more gravity. supernova The explosion of a very large star in which the star may reach a maximum intrinsic luminosity one billion times that of the ...
... A measure of the amount of material an object contains, which causes it to have weight in a gravitational field. Context: The more mass a body has, the more gravity. supernova The explosion of a very large star in which the star may reach a maximum intrinsic luminosity one billion times that of the ...
Neutron Stars
... What is a pulsar? A. A neutron star emitting pulses of light. B. A white dwarf emitting pulses of hydrogen gas. C. A red giant expanding and contracting in very short (millisecond) pulses. D. A powerful gamma ray burst. ...
... What is a pulsar? A. A neutron star emitting pulses of light. B. A white dwarf emitting pulses of hydrogen gas. C. A red giant expanding and contracting in very short (millisecond) pulses. D. A powerful gamma ray burst. ...
Sun and Other Stars Notes
... -The gas particles in the core and radiation zone ____________ with each other constantly but by the time it get to 200,000 km out it is turned into energy and through convection transferred towards the surface C.What is Granulation? -Looking at the surface of the Sun it looks highly _______________ ...
... -The gas particles in the core and radiation zone ____________ with each other constantly but by the time it get to 200,000 km out it is turned into energy and through convection transferred towards the surface C.What is Granulation? -Looking at the surface of the Sun it looks highly _______________ ...
1 - Università degli Studi dell`Insubria
... 1- Almost all galaxies show cuspy density profiles in their inner regions ...
... 1- Almost all galaxies show cuspy density profiles in their inner regions ...
Astr604-Ch1
... 1.2.3 Masses and radii of stars The mass of a star can be measured only by its gravitational effect. Under certain conditions, the mass of star that is member of a binary system can calculate based on spectral line shifts. The radii of a number of stars have been found directly from measurement of t ...
... 1.2.3 Masses and radii of stars The mass of a star can be measured only by its gravitational effect. Under certain conditions, the mass of star that is member of a binary system can calculate based on spectral line shifts. The radii of a number of stars have been found directly from measurement of t ...
Neutron Stars
... B. A white dwarf emitting pulses of hydrogen gas. C. A red giant expanding and contracting in very short (millisecond) pulses. D. A powerful gamma ray burst. E. Your heart during final exams. ...
... B. A white dwarf emitting pulses of hydrogen gas. C. A red giant expanding and contracting in very short (millisecond) pulses. D. A powerful gamma ray burst. E. Your heart during final exams. ...
Stellar Evolution - Lick Observatory
... very quickly (10,000 years), less massive stars evolve more slowly -- up to 10 million years. • The long `flat’ sections imply contraction. Increasing Teff at constant L means the surface area is decreasing. ...
... very quickly (10,000 years), less massive stars evolve more slowly -- up to 10 million years. • The long `flat’ sections imply contraction. Increasing Teff at constant L means the surface area is decreasing. ...
Cygnus X-1
Cygnus X-1 (abbreviated Cyg X-1) is a well-known galactic X-ray source, thought to be a black hole, in the constellation Cygnus. It was discovered in 1964 during a rocket flight and is one of the strongest X-ray sources seen from Earth, producing a peak X-ray flux density of 6977229999999999999♠2.3×10−23 Wm−2 Hz−1 (7003230000000000000♠2.3×103 Jansky). Cygnus X-1 was the first X-ray source widely accepted to be a black hole and it remains among the most studied astronomical objects in its class. The compact object is now estimated to have a mass about 14.8 times the mass of the Sun and has been shown to be too small to be any known kind of normal star, or other likely object besides a black hole. If so, the radius of its event horizon is about 7004440000000000000♠44 km.Cygnus X-1 belongs to a high-mass X-ray binary system about 7019574266339685654♠6070 ly from the Sun that includes a blue supergiant variable star designated HDE 226868 which it orbits at about 0.2 AU, or 20% of the distance from the Earth to the Sun. A stellar wind from the star provides material for an accretion disk around the X-ray source. Matter in the inner disk is heated to millions of degrees, generating the observed X-rays. A pair of jets, arranged perpendicular to the disk, are carrying part of the energy of the infalling material away into interstellar space.This system may belong to a stellar association called Cygnus OB3, which would mean that Cygnus X-1 is about five million years old and formed from a progenitor star that had more than 7001400000000000000♠40 solar masses. The majority of the star's mass was shed, most likely as a stellar wind. If this star had then exploded as a supernova, the resulting force would most likely have ejected the remnant from the system. Hence the star may have instead collapsed directly into a black hole.Cygnus X-1 was the subject of a friendly scientific wager between physicists Stephen Hawking and Kip Thorne in 1975, with Hawking betting that it was not a black hole. He conceded the bet in 1990 after observational data had strengthened the case that there was indeed a black hole in the system. This hypothesis has not been confirmed due to a lack of direct observation but has generally been accepted from indirect evidence.