Name
... 35) Put these stars in order from hottest to coldest surface temperatures: A3, B2, F7, G8, K6. Hottest Coldest surface temperature A) B2, A3, F7, G8, K6 B) G8, K6, F7, A3, B2 C) A3, B2, F7, K6, G8 D) B2, A3, F7, K6, G8 E) F7, B2, A3, G8, K6 36) The term “blackbody” refers to an idealized object th ...
... 35) Put these stars in order from hottest to coldest surface temperatures: A3, B2, F7, G8, K6. Hottest Coldest surface temperature A) B2, A3, F7, G8, K6 B) G8, K6, F7, A3, B2 C) A3, B2, F7, K6, G8 D) B2, A3, F7, K6, G8 E) F7, B2, A3, G8, K6 36) The term “blackbody” refers to an idealized object th ...
here
... 1: Red dwarf (e.g., an M star) implies low-mass. Low-metallicity implies Pop II. Perpendicular through the disk implies not a disk-like orbit. Thus, this is likely an old, Pop II star from the stellar halo of the Milky Way. 2: Before Big Bang Nucleosynthesis, the universe was too hot for nuclei like ...
... 1: Red dwarf (e.g., an M star) implies low-mass. Low-metallicity implies Pop II. Perpendicular through the disk implies not a disk-like orbit. Thus, this is likely an old, Pop II star from the stellar halo of the Milky Way. 2: Before Big Bang Nucleosynthesis, the universe was too hot for nuclei like ...
Gravitation and Orbital Motion
... 11. A certain binary star system consists of two identical stars in circular orbits about a common center of mass halfway between them. (Draw a diagram) Their orbital speed is 185,000 m/s and each one orbits the center of mass in exactly 19 days. What is the mass of each star, in units of solar mass ...
... 11. A certain binary star system consists of two identical stars in circular orbits about a common center of mass halfway between them. (Draw a diagram) Their orbital speed is 185,000 m/s and each one orbits the center of mass in exactly 19 days. What is the mass of each star, in units of solar mass ...
eta carinae – nature`s own hadron collider
... ETA CARINAE IS ONE OF THE MOST MASSIVE STARS KNOWN. IT IS AROUND 100 SOLAR MASSES. THE UPPER LIMIT OF STAR SIZE IS THOUGHT TO BE AROUND 150 SOLAR MASSES. BECAUSE OF ITS SIZE, AND THE HIGH ENERGIES PRODUCED BECAUSE OF GRAVITY, IT IS UNSTABLE. ...
... ETA CARINAE IS ONE OF THE MOST MASSIVE STARS KNOWN. IT IS AROUND 100 SOLAR MASSES. THE UPPER LIMIT OF STAR SIZE IS THOUGHT TO BE AROUND 150 SOLAR MASSES. BECAUSE OF ITS SIZE, AND THE HIGH ENERGIES PRODUCED BECAUSE OF GRAVITY, IT IS UNSTABLE. ...
Problem 4: magnitude of the star?
... M5 is a globular cluster. These are collections of very old stars, so the brightest are yellow and red giants, as opposed to blue main sequence stars. You can see that clearly by comparing it with image D, a very young star cluster (the Pleiades). The HR diagrams of globular clusters all look the sa ...
... M5 is a globular cluster. These are collections of very old stars, so the brightest are yellow and red giants, as opposed to blue main sequence stars. You can see that clearly by comparing it with image D, a very young star cluster (the Pleiades). The HR diagrams of globular clusters all look the sa ...
Name - MIT
... E) F type 37) For main sequence stars, the general rule is that the lower the surface temperature, … A) the greater the size of the core B) the greater the masses of the stars. C) the less luminous are the stars. D) the greater the diameter of the star E) the shorter the lifetime on the main sequenc ...
... E) F type 37) For main sequence stars, the general rule is that the lower the surface temperature, … A) the greater the size of the core B) the greater the masses of the stars. C) the less luminous are the stars. D) the greater the diameter of the star E) the shorter the lifetime on the main sequenc ...
Section 25.2 Stellar Evolution
... remain in the stable main-sequence stage until they consume all their hydrogen fuel and collapse into a white dwarf. Death of Medium-Mass Stars Stars with masses similar to the sun evolve in essentially the same way as lowmass stars. During their collapse from red giants to white dwarfs, medium- ...
... remain in the stable main-sequence stage until they consume all their hydrogen fuel and collapse into a white dwarf. Death of Medium-Mass Stars Stars with masses similar to the sun evolve in essentially the same way as lowmass stars. During their collapse from red giants to white dwarfs, medium- ...
Document
... • From variable stars we know distances. • From Doppler shift we know rotation velocity. • Use Kepler’s Third Law (again) to get mass of the Milky Way. • M = 1011 x Msun ...
... • From variable stars we know distances. • From Doppler shift we know rotation velocity. • Use Kepler’s Third Law (again) to get mass of the Milky Way. • M = 1011 x Msun ...
Milky Way
... • What causes the mass to keep on increasing? • Don’t see anything there. Thus “dark” matter. ...
... • What causes the mass to keep on increasing? • Don’t see anything there. Thus “dark” matter. ...
Review Game
... Sequence at which stars are just in the process of evolving away to become giant stars. 35) From hottest to coolest, the seven letters for the star types are: 36) A relatively common type of stellar outburst, ________, are believed to be the result of close binary systems in which matter from one st ...
... Sequence at which stars are just in the process of evolving away to become giant stars. 35) From hottest to coolest, the seven letters for the star types are: 36) A relatively common type of stellar outburst, ________, are believed to be the result of close binary systems in which matter from one st ...
High Mass Stellar Evolution
... High mass stars (> 8 Msolar) have more fuel but they use it up much more quickly than low mass stars (higher luminosity). ...
... High mass stars (> 8 Msolar) have more fuel but they use it up much more quickly than low mass stars (higher luminosity). ...
answers - Salem State University
... 13. A white dwarf will not have exhausted its potential carbon fuel, but there is not sufficient gravity to compress its carbon nuclei and electrons further. So there will be emission but not sufficient to be a very luminous star given its size (slight bigger than our Sun). 14. A nova is fusion on t ...
... 13. A white dwarf will not have exhausted its potential carbon fuel, but there is not sufficient gravity to compress its carbon nuclei and electrons further. So there will be emission but not sufficient to be a very luminous star given its size (slight bigger than our Sun). 14. A nova is fusion on t ...
The Life Cycle of a Star
... Stellar winds will peel away gases of the red giant and over time, its remnant will cool slowly and lose its brightness. It then becomes a white dwarf. ...
... Stellar winds will peel away gases of the red giant and over time, its remnant will cool slowly and lose its brightness. It then becomes a white dwarf. ...
Learning Objectives Weeks 9-11 . 1. Know that star birth can begin
... 21. The most intense radiation bursts in the universe may be caused by the formation of black holes. Gamma-ray bursters are incredibly bright flashes of radiation from remarkably distant galaxies. 22. Supermassive black holes exist at the centers of most galaxies. The largest black holes have billio ...
... 21. The most intense radiation bursts in the universe may be caused by the formation of black holes. Gamma-ray bursters are incredibly bright flashes of radiation from remarkably distant galaxies. 22. Supermassive black holes exist at the centers of most galaxies. The largest black holes have billio ...
Gamma Ray Bursts and the Birth of Black Holes
... Black holes have been predicted since the 1940s from solutions of Einstein’s general relativity field equation. There is strong evidence of their existence from astronomical observations, but their origin has remained an open question of great interest. Gammaray bursts may the clue. They are powerfu ...
... Black holes have been predicted since the 1940s from solutions of Einstein’s general relativity field equation. There is strong evidence of their existence from astronomical observations, but their origin has remained an open question of great interest. Gammaray bursts may the clue. They are powerfu ...
Supernova: Five Stages in the Death of a Star
... compresses and heats the envelope, thus producing a very bright flash of light from the inside of the star. ...
... compresses and heats the envelope, thus producing a very bright flash of light from the inside of the star. ...
Universal Gravitation Worksheet
... the radius of star B. Calculate the ratio of the gravitational field strength on star A to that on star B. (4) Planet A has a mass that is twice as large as the mass of planet B and a radius that is twice as large as the radius of planet B. Calculate the ratio of the gravitational field strength on ...
... the radius of star B. Calculate the ratio of the gravitational field strength on star A to that on star B. (4) Planet A has a mass that is twice as large as the mass of planet B and a radius that is twice as large as the radius of planet B. Calculate the ratio of the gravitational field strength on ...
Make one copy for each student on plain paper. Life Cycle of Star
... its own heat and light by nuclear reactions. They live for billions of years before becoming a red giant. ...
... its own heat and light by nuclear reactions. They live for billions of years before becoming a red giant. ...
Life Cycle of Star Pictures
... its own heat and light by nuclear reactions. They live for billions of years before becoming a red giant. ...
... its own heat and light by nuclear reactions. They live for billions of years before becoming a red giant. ...
Part 2: Solar System Formation
... the constellation Orion are huge clouds of gas and dust. • Among these clouds the Hubble Space Telescope observed lumps and knots that appear to be new stars and planets being formed. ...
... the constellation Orion are huge clouds of gas and dust. • Among these clouds the Hubble Space Telescope observed lumps and knots that appear to be new stars and planets being formed. ...
Lailaigib Lifecycle Of A Star
... A neutron star is about 20 km in diameter and the mass of about 1.4 times that of the Sun. This means that a neutron star is so bigger that on Earth, one teaspoonful would weigh a billion tons. Its small size and high density, a neutron star possesses a surface gravitational field. http://imagine.gs ...
... A neutron star is about 20 km in diameter and the mass of about 1.4 times that of the Sun. This means that a neutron star is so bigger that on Earth, one teaspoonful would weigh a billion tons. Its small size and high density, a neutron star possesses a surface gravitational field. http://imagine.gs ...
Consequences of Neutrino Emission from a Phase
... In our study we did not consider the detail formation process from normal matter to quark matter. We simply assume that a neutron star suddenly undergoes a phase-transition. We use a 3D Newtonian hydrodynamic code to study the consequences of phase-transitioninduced collapse. This code solves a set ...
... In our study we did not consider the detail formation process from normal matter to quark matter. We simply assume that a neutron star suddenly undergoes a phase-transition. We use a 3D Newtonian hydrodynamic code to study the consequences of phase-transitioninduced collapse. This code solves a set ...
Test#3
... 37. Which type of binary star is revealed by periodic decreases in brightness? a) spectroscopic binaries, b) eclipsing binaries, c) visual binaries, d) astrometric binaries 38. What information about a binary star system is sufficient to make it possible to find the sum of the masses of the two star ...
... 37. Which type of binary star is revealed by periodic decreases in brightness? a) spectroscopic binaries, b) eclipsing binaries, c) visual binaries, d) astrometric binaries 38. What information about a binary star system is sufficient to make it possible to find the sum of the masses of the two star ...
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.