powerpoint - Physics @ IUPUI
... • This is done by radiation pressure and gas pressure (they counteract gravity). • But to keep this up requires the constant generation of energy in the core. ...
... • This is done by radiation pressure and gas pressure (they counteract gravity). • But to keep this up requires the constant generation of energy in the core. ...
Star Lifecycle
... Star lifecycle • When the hydrogen fuel is gone, stars fuse Helium into Carbon. • The more massive stars can fuse carbon into even heavier elements. • Iron (Fe)is generally the largest element being fused in stars. • Larger elements than Fe are usually produced via supernovas ...
... Star lifecycle • When the hydrogen fuel is gone, stars fuse Helium into Carbon. • The more massive stars can fuse carbon into even heavier elements. • Iron (Fe)is generally the largest element being fused in stars. • Larger elements than Fe are usually produced via supernovas ...
Problem Set #3
... a. What is the radius of this neutron star, expressed as a fraction of its Schwarzschild radius? You can use Equation 18.41 from the book. b. What is the mean density of this neutron star? c. A carbon nucleus has a radius of 3 x 10-15 m. What is its density? d. What is the ratio of the density of a ...
... a. What is the radius of this neutron star, expressed as a fraction of its Schwarzschild radius? You can use Equation 18.41 from the book. b. What is the mean density of this neutron star? c. A carbon nucleus has a radius of 3 x 10-15 m. What is its density? d. What is the ratio of the density of a ...
Astronomical Ideas Fall 2012 Homework 4 Solutions 1. Two stars
... L = brightness ⋅ 4π d 2 If two objects have the same brightness, but one is three times more distant, then the more distant object must be 9 times more luminous. 2. The double star system Albireo has one yellow star and one blue star. What do we know about the relative temperatures of these stars ba ...
... L = brightness ⋅ 4π d 2 If two objects have the same brightness, but one is three times more distant, then the more distant object must be 9 times more luminous. 2. The double star system Albireo has one yellow star and one blue star. What do we know about the relative temperatures of these stars ba ...
Lecture_17ppt
... events outside of the event horizon (i.e. no information can be sent from inside to outside the horizon) – Observer who enters event horizon would only feel “strange” gravitational effects if the black hole mass is small, so that Rs is comparable to their size – Once inside the event horizon, future ...
... events outside of the event horizon (i.e. no information can be sent from inside to outside the horizon) – Observer who enters event horizon would only feel “strange” gravitational effects if the black hole mass is small, so that Rs is comparable to their size – Once inside the event horizon, future ...
ppt document
... There are three possibilities for the collapsed core depending on the mass of the remaining core: 1) If the final mass after the planetary nebula release is less than 1.4 solar masses, the remaining mass of the star will collapse down to a size about that of the earth. It will be a white dwarf star, ...
... There are three possibilities for the collapsed core depending on the mass of the remaining core: 1) If the final mass after the planetary nebula release is less than 1.4 solar masses, the remaining mass of the star will collapse down to a size about that of the earth. It will be a white dwarf star, ...
ppt
... It is well known that a magnetic star will not be spherical and, if the rotation axis and the magnetic axis are not aligned, one could have a “magnetic mountain” leading to GW emission. However such deformations are unlikely to be large enough to balance the accretion torques in weakly magnetised sy ...
... It is well known that a magnetic star will not be spherical and, if the rotation axis and the magnetic axis are not aligned, one could have a “magnetic mountain” leading to GW emission. However such deformations are unlikely to be large enough to balance the accretion torques in weakly magnetised sy ...
Notes
... The star will settle into a hydrostatic and thermal equilibrium, where cooling is balanced by nuclear energy generation and there is no time dependence of any state variables. ...
... The star will settle into a hydrostatic and thermal equilibrium, where cooling is balanced by nuclear energy generation and there is no time dependence of any state variables. ...
The activities of the Astronomical Institute of the Slovak Academy of
... We studied the multi-wavelength characteristics at high spatial resolution, as well as chromospheric evaporation signatures of solar microflares. To this end, we analyzed the fine structure and mass flow dynamics in the chromosphere, transition region and corona of three homologous microflares (GOES ...
... We studied the multi-wavelength characteristics at high spatial resolution, as well as chromospheric evaporation signatures of solar microflares. To this end, we analyzed the fine structure and mass flow dynamics in the chromosphere, transition region and corona of three homologous microflares (GOES ...
Introduction
... this leakage must be slow to maintain a star steady. A feedback mechanism is needed, like a thermometer. The energy generation also needs to be balanced by energy removal, but not too fast. Then we call the material is in “thermal balance”. Three major modes of energy transportation: radiation (phot ...
... this leakage must be slow to maintain a star steady. A feedback mechanism is needed, like a thermometer. The energy generation also needs to be balanced by energy removal, but not too fast. Then we call the material is in “thermal balance”. Three major modes of energy transportation: radiation (phot ...
Micro_lect20
... Orionis, one of the brightest stars in the familiar constellation of Orion, the Hunter. 4. The name Betelgeuse is Arabic in origin. As a massive red supergiant, it is nearing the end of its life and will soon become a supernova. In this historic image, a bright hotspot is revealed on the star's surf ...
... Orionis, one of the brightest stars in the familiar constellation of Orion, the Hunter. 4. The name Betelgeuse is Arabic in origin. As a massive red supergiant, it is nearing the end of its life and will soon become a supernova. In this historic image, a bright hotspot is revealed on the star's surf ...
FINAL EXAM Name: ASTRONOMY II - 79202 Spring 1995
... times brighter than star #2. Which of the following statements is necessarily true? A. B. C. D. E. ...
... times brighter than star #2. Which of the following statements is necessarily true? A. B. C. D. E. ...
NCEA Level 2 Earth and Space Science (91192) 2015
... begin to collide and form bigger masses. The bigger masses collect more particles due to increasing gravitational field strength. There are two things that affect the formation of planets – temperature and the presence or absence of solar winds. The inner planets have formed in a higher temperature ...
... begin to collide and form bigger masses. The bigger masses collect more particles due to increasing gravitational field strength. There are two things that affect the formation of planets – temperature and the presence or absence of solar winds. The inner planets have formed in a higher temperature ...
NCEA Level 2 Earth and Space Science (91192) 2015
... begin to collide and form bigger masses. The bigger masses collect more particles due to increasing gravitational field strength. There are two things that affect the formation of planets – temperature and the presence or absence of solar winds. The inner planets have formed in a higher temperature ...
... begin to collide and form bigger masses. The bigger masses collect more particles due to increasing gravitational field strength. There are two things that affect the formation of planets – temperature and the presence or absence of solar winds. The inner planets have formed in a higher temperature ...
Issue 122 - Aug 2014
... Aquila has three stars brighter than third magnitude: Altair (Alpha Aquilae), Tarazed (Gamma Aquilae), and Deneb el Okab (tail of the falcon; Zeta Aquilae). Altair is an A-type (white, average temperature 7,700K) main sequence star. Its mass is 1.8 times that of the Sun and its diameter is 1.8 times ...
... Aquila has three stars brighter than third magnitude: Altair (Alpha Aquilae), Tarazed (Gamma Aquilae), and Deneb el Okab (tail of the falcon; Zeta Aquilae). Altair is an A-type (white, average temperature 7,700K) main sequence star. Its mass is 1.8 times that of the Sun and its diameter is 1.8 times ...
A105 Stars and Galaxies
... We can see through the gas and dust, to observe many of the stars near the Galactic center. But the Galactic center ...
... We can see through the gas and dust, to observe many of the stars near the Galactic center. But the Galactic center ...
Slide 1
... -A final decision on the appropriate criteria for data selection (that is, the separation of the data into four regions of interest for fitting) will need to be made. -Since the data represents a two dimensional surface rather than a curve when the mass is not held constant, a multivariable fit will ...
... -A final decision on the appropriate criteria for data selection (that is, the separation of the data into four regions of interest for fitting) will need to be made. -Since the data represents a two dimensional surface rather than a curve when the mass is not held constant, a multivariable fit will ...
Stellar Evolution (Powerpoint) 17
... massive stars. • Very useful – they’re all the ~same – 1.4 solar mass white dwarfs undergoing nuclear fusion. This turns out to mean they are… • GREAT “standard candles” – objects of known luminosity, on which we can then use simple math to determine their distance. • So, any SN I and its host galax ...
... massive stars. • Very useful – they’re all the ~same – 1.4 solar mass white dwarfs undergoing nuclear fusion. This turns out to mean they are… • GREAT “standard candles” – objects of known luminosity, on which we can then use simple math to determine their distance. • So, any SN I and its host galax ...
1 Kepler`s Third Law
... most energy. Low frequency (long wavelength) photons are the least energetic. The constant, h, is called Plank’s constant and once again its purpose is to scale the equation so that it agrees with our system of measurement. Example: Q: Which type of photon carries the most energy, ultraviolet photon ...
... most energy. Low frequency (long wavelength) photons are the least energetic. The constant, h, is called Plank’s constant and once again its purpose is to scale the equation so that it agrees with our system of measurement. Example: Q: Which type of photon carries the most energy, ultraviolet photon ...
Astronomy 103: Midterm 2 Answers Correct answer in bold
... parallax angle to find surface temperature ...
... parallax angle to find surface temperature ...
MASSACHUSETTS INSTITUTE OF TECHNOLOGY
... (c) Assuming that the moment of inertia is that of a uniform sphere when the collapse begins, and that the moment inertia is that of a uniform disk when the collapse ends, determine the rotational velocity at 100 AU when the collapse stops. (d) After the collapse has stopped, calculate the time requ ...
... (c) Assuming that the moment of inertia is that of a uniform sphere when the collapse begins, and that the moment inertia is that of a uniform disk when the collapse ends, determine the rotational velocity at 100 AU when the collapse stops. (d) After the collapse has stopped, calculate the time requ ...
Our Sun, Sol - Hobbs High School
... spinning neutron star with jets of particles moving almost at the speed of light streaming out above its magnetic poles. • These jets produce very powerful beams of light. • The precise periods of pulsars make them useful tools to astronomers. ...
... spinning neutron star with jets of particles moving almost at the speed of light streaming out above its magnetic poles. • These jets produce very powerful beams of light. • The precise periods of pulsars make them useful tools to astronomers. ...
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.