Pallavicini - IASF Milano
... slightly lower metallicity. On the basis of ROSAT observations a much lower detection rate of cluster sources was reported for Praesepe than for the Hyades (Randich & Schmitt 1995) suggesting that a cluster of a given age may not be representative of all clusters with the same age. Age 600 Myr, meta ...
... slightly lower metallicity. On the basis of ROSAT observations a much lower detection rate of cluster sources was reported for Praesepe than for the Hyades (Randich & Schmitt 1995) suggesting that a cluster of a given age may not be representative of all clusters with the same age. Age 600 Myr, meta ...
Balloon Man in Perseus + 3 charts
... sprays of stars so much that if I can, I look at this object every night it is up, several times, show it to all who heed my call to the eyepiece, and then as the last object of the night, capping my scope and hoping to "keep" some of its light for next time. Find the Double Cluster by looking midwa ...
... sprays of stars so much that if I can, I look at this object every night it is up, several times, show it to all who heed my call to the eyepiece, and then as the last object of the night, capping my scope and hoping to "keep" some of its light for next time. Find the Double Cluster by looking midwa ...
AS2001 - University of St Andrews
... metallicity relation (FMR). • Despite extremely complex underlying physics, the relation seems to hold out to z = 2.5 and in a huge range of galaxies / environments. ...
... metallicity relation (FMR). • Despite extremely complex underlying physics, the relation seems to hold out to z = 2.5 and in a huge range of galaxies / environments. ...
PH709-10-asn1ans
... The planet mass can be loosely constrained: The relevant time scale is called the Einstein time and it's given by the time it takes the lens (moving at speed v) to traverse an Einstein radius. ...
... The planet mass can be loosely constrained: The relevant time scale is called the Einstein time and it's given by the time it takes the lens (moving at speed v) to traverse an Einstein radius. ...
sun notes
... Brightness of Stars __absolute__ magnitude – The measure of the amount light a star gives off (How bright the star really is) __apparent______ magnitude – A measure of the amount of light received on Earth (How bright it looks because it is closer). __Luminosity_______ – Energy output from the ...
... Brightness of Stars __absolute__ magnitude – The measure of the amount light a star gives off (How bright the star really is) __apparent______ magnitude – A measure of the amount of light received on Earth (How bright it looks because it is closer). __Luminosity_______ – Energy output from the ...
ppt document
... have a much higher rotational speed due to the collapse. The magnetic field may cause light to be emitted in a beam, and with the rotation this beam may rotate at a high angular speed. We have seen pulses of light with periods of a few seconds from these spinning neutron stars and so we call them pu ...
... have a much higher rotational speed due to the collapse. The magnetic field may cause light to be emitted in a beam, and with the rotation this beam may rotate at a high angular speed. We have seen pulses of light with periods of a few seconds from these spinning neutron stars and so we call them pu ...
Stellar Evolution
... luminosity, but hotter tends to increase luminosity. The position of the newly forming star on the H-R diagram will move to the left as it heats up but wander up and down somewhat as its size shrinks. This process takes about 50 million years for a star like the sun, but may take a much shorter time ...
... luminosity, but hotter tends to increase luminosity. The position of the newly forming star on the H-R diagram will move to the left as it heats up but wander up and down somewhat as its size shrinks. This process takes about 50 million years for a star like the sun, but may take a much shorter time ...
ASTRONOMY: WHAT DO YOU NEED TO KNOW
... compressed by the fast gases as the red giant collapses into a white dwarf Know the characteristics and lifespan characteristics of white dwarfs. Does not undergo nuclear fusion but rather contains degenerate matter; contains no gas but radiates energy into space which can take many billions of year ...
... compressed by the fast gases as the red giant collapses into a white dwarf Know the characteristics and lifespan characteristics of white dwarfs. Does not undergo nuclear fusion but rather contains degenerate matter; contains no gas but radiates energy into space which can take many billions of year ...
14.5 Yellow Giants and Pulsating Stars Variable Stars Not all stars
... becomes an RR Lyrae variable star. When a highmass star crosses the instability strip in its red giant phase, being more luminous it instead becomes a Cepheid variable. The amount of time a given star spends in the instability strip depends on its mass. Massive stars such as the highly luminous Cep ...
... becomes an RR Lyrae variable star. When a highmass star crosses the instability strip in its red giant phase, being more luminous it instead becomes a Cepheid variable. The amount of time a given star spends in the instability strip depends on its mass. Massive stars such as the highly luminous Cep ...
Lecture 5: Stars
... We saw that locally we can make an HR diagram of absolute luminosity against temperature. We find a main sequence, giants and white dwarfs. ...
... We saw that locally we can make an HR diagram of absolute luminosity against temperature. We find a main sequence, giants and white dwarfs. ...
Today`s Class: Measuring temperatures of stars Astronomer`s
... • Most had studied astronomy, but were not allowed to work as scientists ...
... • Most had studied astronomy, but were not allowed to work as scientists ...
File
... Sky appears tilted at an angle equal to our latitude. Stars appear to move in arcs across the sky that are not perpendicular to horizon. ...
... Sky appears tilted at an angle equal to our latitude. Stars appear to move in arcs across the sky that are not perpendicular to horizon. ...
In class Review Notes(5-20-14)
... in a cold zone for away from the sun, and rocky planets formed in a hot zone close to the sun. ...
... in a cold zone for away from the sun, and rocky planets formed in a hot zone close to the sun. ...
Monday, October 27
... • Then do the following Gedankenexperiment: – In your mind, put the star from its actual position to a position 10 pc away – If a star is actually closer than 10pc, its absolute magnitude will be a bigger number, i.e. it is intrinsically dimmer than it appears – If a star is farther than 10pc, its a ...
... • Then do the following Gedankenexperiment: – In your mind, put the star from its actual position to a position 10 pc away – If a star is actually closer than 10pc, its absolute magnitude will be a bigger number, i.e. it is intrinsically dimmer than it appears – If a star is farther than 10pc, its a ...
Friday, April 25 - Otterbein University
... • Cepheids in Andromeda Galaxies established the “extragalacticity” of this “nebula” ...
... • Cepheids in Andromeda Galaxies established the “extragalacticity” of this “nebula” ...
Lecture 6
... cut in half, how much brighter would the sun appear in our sky? a. 2x brighter b. 4x brighter c. 8x brighter d. 16x brighter Brightness is a function of the inverse square of distance, so if distance was cut by half it would get brighter by 4x=1/(.5)2 ...
... cut in half, how much brighter would the sun appear in our sky? a. 2x brighter b. 4x brighter c. 8x brighter d. 16x brighter Brightness is a function of the inverse square of distance, so if distance was cut by half it would get brighter by 4x=1/(.5)2 ...
Astronomy Final Study Guide – Name: **This will be the biggest test
... 25. Describe how new stars form. How might supernovas and planetary nebulae contribute to new star formation? ...
... 25. Describe how new stars form. How might supernovas and planetary nebulae contribute to new star formation? ...
lecture12
... There is no difference in the lines of the two stars. Star A’s lines are stronger than Star B’s lines. ...
... There is no difference in the lines of the two stars. Star A’s lines are stronger than Star B’s lines. ...
Lecture 15 (pdf from the powerpoint)
... Stellar Evolution Before…..During……and After…. The Main Sequence It’s all about gravity…… ...
... Stellar Evolution Before…..During……and After…. The Main Sequence It’s all about gravity…… ...