Astronomical Ideas Fall 2012 Homework 4 Solutions 1. Two stars
... massive stars that still burn H on the main sequence is a clock, because we know that the cluster needs to be old enough so that all of the more massive stars have already burned up all of their Hydrogen and left the main sequence. ...
... massive stars that still burn H on the main sequence is a clock, because we know that the cluster needs to be old enough so that all of the more massive stars have already burned up all of their Hydrogen and left the main sequence. ...
Astron 104 Laboratory #11 The Scale of the Milky Way
... called the Local Group. The following table lists the distances to the centers of three Local Group galaxies. Draw a dot on your picture (if possible) to represent the center of each galaxy. Don’t worry about the direction (left/right/up/down) for each galaxy; just place a dot an appropriate distanc ...
... called the Local Group. The following table lists the distances to the centers of three Local Group galaxies. Draw a dot on your picture (if possible) to represent the center of each galaxy. Don’t worry about the direction (left/right/up/down) for each galaxy; just place a dot an appropriate distanc ...
Stellar Evolution
... • No more fusion. • Glow by their heat alone. • Eventually cool and fade away black dwarf. ...
... • No more fusion. • Glow by their heat alone. • Eventually cool and fade away black dwarf. ...
Unit 2 - Astronomy
... Galaxies and Stars • Stars have a life cycle and undergo stellar evolution • Stars originate from a cloud of dust and gases • Gravity causes them to clump together and form larger balls of dust and gases ...
... Galaxies and Stars • Stars have a life cycle and undergo stellar evolution • Stars originate from a cloud of dust and gases • Gravity causes them to clump together and form larger balls of dust and gases ...
10.5 The Hertzsprung
... 10.5 The Hertzsprung-Russell Diagram Once many stars are plotted on an H-R diagram, a pattern begins to form: These are the 80 closest stars to us; note the dashed lines of constant radius. The darkened curve is called the Main Sequence, as this is where most stars are. Also indicated is the white ...
... 10.5 The Hertzsprung-Russell Diagram Once many stars are plotted on an H-R diagram, a pattern begins to form: These are the 80 closest stars to us; note the dashed lines of constant radius. The darkened curve is called the Main Sequence, as this is where most stars are. Also indicated is the white ...
ASTR101 Unit 10 Assessment Answer Key 1. Mass, luminosity, size
... from about 60 solar masses to about 1/12 solar mass, in luminosity from about 1,000,000 to 1/10,000 solar luminosities, in radius from about 1,000 to 1/10 solar radii, in surface temperature from about 35,000 to 3,000 K, and in age, from about 13 billion years to stars that are just now being born. ...
... from about 60 solar masses to about 1/12 solar mass, in luminosity from about 1,000,000 to 1/10,000 solar luminosities, in radius from about 1,000 to 1/10 solar radii, in surface temperature from about 35,000 to 3,000 K, and in age, from about 13 billion years to stars that are just now being born. ...
Lecture (Powerpoint)
... ends the process If core is large enough, burning can `turn on' and begins rather violently Under some circumstances, enormous jet can form perpendicular to disk ...
... ends the process If core is large enough, burning can `turn on' and begins rather violently Under some circumstances, enormous jet can form perpendicular to disk ...
Astronomy 103 Exam 2 Review
... of the following observaLon methods is not valid? A. Ma=er pulled off a companion star emits a characterisLc X‐ ray spectrum as it falls toward the black hole. B. Companion stars suddenly disappear from view as they plunge into the black hole. C. Black holes can act as gravitaLonal lenses, formin ...
... of the following observaLon methods is not valid? A. Ma=er pulled off a companion star emits a characterisLc X‐ ray spectrum as it falls toward the black hole. B. Companion stars suddenly disappear from view as they plunge into the black hole. C. Black holes can act as gravitaLonal lenses, formin ...
Outline2a
... better penetrates the interstellar dust, while the shorter wavelength light is scattered away. The protostars are totally obscured in the optical, but can be detected in the infrared. ...
... better penetrates the interstellar dust, while the shorter wavelength light is scattered away. The protostars are totally obscured in the optical, but can be detected in the infrared. ...
Way Milky the MAPPING
... Consider the center of the Milky Way. More than 24,000 light-years from the sun—near the intersection of the constellations of Sagittarius and Scorpius—the center of our spiral galaxy is home to a dense concentration of stars that date to within a few billion years of the birth of the universe. Tho ...
... Consider the center of the Milky Way. More than 24,000 light-years from the sun—near the intersection of the constellations of Sagittarius and Scorpius—the center of our spiral galaxy is home to a dense concentration of stars that date to within a few billion years of the birth of the universe. Tho ...
PHYS3380_102615_bw
... We have observed disks around other stars. These could be new planetary systems in formation. ...
... We have observed disks around other stars. These could be new planetary systems in formation. ...
An introduction to the HR diagram File
... • These high mass stars finish their lives in massive supernova explosions • At the bottom right the stars are cool. These low mass stars are very long lived as they use their fuel so slowly. Very low mass M stars live many billions of years and will simply run out of fuel without dramatic events. ...
... • These high mass stars finish their lives in massive supernova explosions • At the bottom right the stars are cool. These low mass stars are very long lived as they use their fuel so slowly. Very low mass M stars live many billions of years and will simply run out of fuel without dramatic events. ...
The Basics of the Universe
... was to fall into it would be spaghettified, a term used to describe the process of entering a black hole. It would be stretched apart, including the atoms! Even though you cannot see these atoms, you may see them with other matter if they are ejected out at the poles. Black holes that do this are ca ...
... was to fall into it would be spaghettified, a term used to describe the process of entering a black hole. It would be stretched apart, including the atoms! Even though you cannot see these atoms, you may see them with other matter if they are ejected out at the poles. Black holes that do this are ca ...
Document
... Globular clusters in only one direction. Globular clusters in all directions. Many more supernovae than we do now. Many more stars being formed than we do now. None of the above. ...
... Globular clusters in only one direction. Globular clusters in all directions. Many more supernovae than we do now. Many more stars being formed than we do now. None of the above. ...
Stellar Evolution
... What then? • When the hydrogen in the core is almost consumed the balance between gravity pulling in and pressure pushing out is disturbed. • The structure and appearance of the star changes dramatically. • What happens then, depends on the star’s mass. • Two cases: – Low-mass (< 8 x mass of Sun) – ...
... What then? • When the hydrogen in the core is almost consumed the balance between gravity pulling in and pressure pushing out is disturbed. • The structure and appearance of the star changes dramatically. • What happens then, depends on the star’s mass. • Two cases: – Low-mass (< 8 x mass of Sun) – ...
9binary1i
... Spectroscopic Binary Motion What information can we get about the orbit if we can’t see it? Can get the velocity of the orbit from the Doppler shift More shifted the lines the faster the star is moving in its orbit ...
... Spectroscopic Binary Motion What information can we get about the orbit if we can’t see it? Can get the velocity of the orbit from the Doppler shift More shifted the lines the faster the star is moving in its orbit ...
Problem set 2
... and luminosity from the textbook, and between mass and radius (you can assume it’s linear, R ∼ M), compute Proxima’s effective temperature Tef f . Comparing with sun’s temperature, prove that the star appears much redder than the sun. Compute the effective temperatures of the other two stars (1.1 an ...
... and luminosity from the textbook, and between mass and radius (you can assume it’s linear, R ∼ M), compute Proxima’s effective temperature Tef f . Comparing with sun’s temperature, prove that the star appears much redder than the sun. Compute the effective temperatures of the other two stars (1.1 an ...
Stellar Evolution
... •For example, if the mass of a star is doubled, its luminosity increases by a factor 23.5 ~ 11. •Thus, stars like Sirius that are about twice as massive as the Sun are about 11 times as luminous. •The more massive a Main Sequence star is, the hotter (bluer), and more luminous. •The Main Sequence is ...
... •For example, if the mass of a star is doubled, its luminosity increases by a factor 23.5 ~ 11. •Thus, stars like Sirius that are about twice as massive as the Sun are about 11 times as luminous. •The more massive a Main Sequence star is, the hotter (bluer), and more luminous. •The Main Sequence is ...
Button Text
... . Our closest neighbor in galaxies is Andromeda which is 2,538,000 light years distant. Let us remember that is not miles, that is light years. So take 2,538,000 times ten trillion and you get the amount of miles. This distance in space, while a number we cannot possibly fathom, is minuscule. The fu ...
... . Our closest neighbor in galaxies is Andromeda which is 2,538,000 light years distant. Let us remember that is not miles, that is light years. So take 2,538,000 times ten trillion and you get the amount of miles. This distance in space, while a number we cannot possibly fathom, is minuscule. The fu ...
Topics for this week
... from their lowest energy levels to the next higher level. So cool star have sodium absorption lines. But it isn’t hard to ionize a sodium atom. In hotter stars the sodium atoms are ionized and absorb different energy photons. ...
... from their lowest energy levels to the next higher level. So cool star have sodium absorption lines. But it isn’t hard to ionize a sodium atom. In hotter stars the sodium atoms are ionized and absorb different energy photons. ...