A Tale of Two (Solar) Telescopes: something old, something
... Warning: this talk deals with the two bottom-most rungs of Drake’s Ladder, where sadly the sexiness is low, but on positive side the knowledge content was though to be high; even so, a few surprises still were to be found… ...
... Warning: this talk deals with the two bottom-most rungs of Drake’s Ladder, where sadly the sexiness is low, but on positive side the knowledge content was though to be high; even so, a few surprises still were to be found… ...
Talk
... ~10% of the spectroscopic SDSS objects are observed more than once RV variations will identify such a system as a strong PCEB candidate ...
... ~10% of the spectroscopic SDSS objects are observed more than once RV variations will identify such a system as a strong PCEB candidate ...
Population synthesis view of gravitational waves - Astro-PF
... Indirect observations of gravitational waves ...
... Indirect observations of gravitational waves ...
Stellar Remnants - Sierra College Astronomy Home Page
... A close binary system of a white dwarf and a newly formed red giant will result in the formation of an accretion disk around the white dwarf. Hydrogen build-up on the white dwarf can ignite an explosive fusion reaction blowing off a gas shell that causes the white dwarf to brighten by 10 mags in ...
... A close binary system of a white dwarf and a newly formed red giant will result in the formation of an accretion disk around the white dwarf. Hydrogen build-up on the white dwarf can ignite an explosive fusion reaction blowing off a gas shell that causes the white dwarf to brighten by 10 mags in ...
Stars - cayugascience
... differences between them include what colour they are, how bright (or luminous) they are, and even what their surface temperature is (Figure 8.10). In 1919, two astronomers decided to sort and plot thousands of stars according to these three characteristics. Ejnar Hertzsprung and Henry Norris Russel ...
... differences between them include what colour they are, how bright (or luminous) they are, and even what their surface temperature is (Figure 8.10). In 1919, two astronomers decided to sort and plot thousands of stars according to these three characteristics. Ejnar Hertzsprung and Henry Norris Russel ...
Reading Science!
... study the object in great detail. Scientists who study the night sky observe asteroids, planets, star clusters, stars, black holes, nebulae, comets, and even galaxies that are billions of light years away. McDonald Observatory is home to one of the largest optical telescopes in the world. Called the ...
... study the object in great detail. Scientists who study the night sky observe asteroids, planets, star clusters, stars, black holes, nebulae, comets, and even galaxies that are billions of light years away. McDonald Observatory is home to one of the largest optical telescopes in the world. Called the ...
Notes 3 - 1 Notes 3: Formation of the solar system 3.1 Starting
... I (neutral atomic form). Hydrogen and helium are thought to be originally from the Big Bang rather than as by-products of fusion, though some helium is produced by fusion. Pretty much every other element originated in stellar processes, such as fusion, supernovae events or processes involving high e ...
... I (neutral atomic form). Hydrogen and helium are thought to be originally from the Big Bang rather than as by-products of fusion, though some helium is produced by fusion. Pretty much every other element originated in stellar processes, such as fusion, supernovae events or processes involving high e ...
The First Stars in the Universe
... form. Dust grains and molecules containing heavy elements cool the presentday clouds much more efficiently to temperatures of only about 10 kelvins. The minimum mass that a clump of gas must have to collapse under its gravity is called the Jeans mass, which is proportional to the square of the gas t ...
... form. Dust grains and molecules containing heavy elements cool the presentday clouds much more efficiently to temperatures of only about 10 kelvins. The minimum mass that a clump of gas must have to collapse under its gravity is called the Jeans mass, which is proportional to the square of the gas t ...
KINEMATIC DISCOVERY OF A STELLAR STREAM LOCATED IN
... study of the Cetus Polar Stream (CPS). In the CPS study (Yam et al. 2013), we selected metal-poor (−3.0 < [Fe/H] < −1.5) stars with surface gravities consistent with being giants (0 < log g < 4.0) from the Sloan Digital Sky Survey Data Release 8 (SDSS DR8) spectroscopic data in the south Galactic he ...
... study of the Cetus Polar Stream (CPS). In the CPS study (Yam et al. 2013), we selected metal-poor (−3.0 < [Fe/H] < −1.5) stars with surface gravities consistent with being giants (0 < log g < 4.0) from the Sloan Digital Sky Survey Data Release 8 (SDSS DR8) spectroscopic data in the south Galactic he ...
Lecture 20
... To do 2D smoothing, we will use a 2D kernel k = ones(3,3), and use the conv2() function. So to smooth the residuals of our fit, we can use ...
... To do 2D smoothing, we will use a 2D kernel k = ones(3,3), and use the conv2() function. So to smooth the residuals of our fit, we can use ...
Chapter 12 Star Stuff How do stars form?
... The relationship between apparent brightness and luminosity depends on distance: ...
... The relationship between apparent brightness and luminosity depends on distance: ...
General Astrophysics And Comparative Planetology
... Earth-sized based only on visual observations and an assumed surface reflectance. This estimate was reduced when Pluto’s icy nature was guessed. Finally the Charon-Pluto eclipses during the late 1980s constrained Pluto’s radius to be much smaller—0.18 Earth radii. Sedna is a recently discovered smal ...
... Earth-sized based only on visual observations and an assumed surface reflectance. This estimate was reduced when Pluto’s icy nature was guessed. Finally the Charon-Pluto eclipses during the late 1980s constrained Pluto’s radius to be much smaller—0.18 Earth radii. Sedna is a recently discovered smal ...
Reflecting telescopes - School
... sources is greater than λ/d the two sources can be resolved (we can see them as two separate sources). Where d is the diameter of the aperture and λ is the wavelength of the ...
... sources is greater than λ/d the two sources can be resolved (we can see them as two separate sources). Where d is the diameter of the aperture and λ is the wavelength of the ...
(1) (2) (3) Two star polar alignment Ralph Pass October 7, 2003
... There are some ‘extra’ errors that can be introduced during the process and should be considered. The two major errors are refraction and mirror shift. With care these can be minimized. For example, pick stars above 45 degrees and on the same side of the meridian (for the first two stars). Of course ...
... There are some ‘extra’ errors that can be introduced during the process and should be considered. The two major errors are refraction and mirror shift. With care these can be minimized. For example, pick stars above 45 degrees and on the same side of the meridian (for the first two stars). Of course ...
Gilmore - Astrometry and Astrophysics in the Gaia sky
... distances to 1% for 18 million stars to 2.5 kpc distances to 10% for 150 million stars to 25 kpc rare stellar types and rapid evolutionary phases in large numbers parallax calibration of all distance indicators e.g. Cepheids and RR Lyrae to LMC/SMC ...
... distances to 1% for 18 million stars to 2.5 kpc distances to 10% for 150 million stars to 25 kpc rare stellar types and rapid evolutionary phases in large numbers parallax calibration of all distance indicators e.g. Cepheids and RR Lyrae to LMC/SMC ...
Homework #7 (Ch. 19)
... In the formation of a star cluster with a wide range of stellar masses, is it possible for some stars to die out before others have finished forming? Do you think this will have any effect on the cluster’s formation? 13. Chaisson Problem 19.9 What is the luminosity of a brown dwarf whose radius is 0 ...
... In the formation of a star cluster with a wide range of stellar masses, is it possible for some stars to die out before others have finished forming? Do you think this will have any effect on the cluster’s formation? 13. Chaisson Problem 19.9 What is the luminosity of a brown dwarf whose radius is 0 ...
Galileo & the Telescope—Sept 21
... “Know therefore that about 3 months ago I began to observe Venus with the instrument, and I saw her in a round shape and very small. Day by day she increased in size and maintained that round shape until finally, attaining a great distance from the Sun, the roundness of her eastern part began to dim ...
... “Know therefore that about 3 months ago I began to observe Venus with the instrument, and I saw her in a round shape and very small. Day by day she increased in size and maintained that round shape until finally, attaining a great distance from the Sun, the roundness of her eastern part began to dim ...
20 – N10/4/PHYSI/SP3/ENG/TZ0/XX Option E
... (iii) State why the method of parallax can only be used for stars at a distance of less than a few hundred parsecs from Earth. ...
... (iii) State why the method of parallax can only be used for stars at a distance of less than a few hundred parsecs from Earth. ...
MEarth
... 2 R⊕ orbiting the Sun). JWST photometry will be capable of measuring the day-night temperature difference for warm Earth-like planets orbiting M dwarfs (Charbonneau & Deming 2007), thus addressing the extent of heat redistribution on these planets and hence the presence or absence of an atmosphere ...
... 2 R⊕ orbiting the Sun). JWST photometry will be capable of measuring the day-night temperature difference for warm Earth-like planets orbiting M dwarfs (Charbonneau & Deming 2007), thus addressing the extent of heat redistribution on these planets and hence the presence or absence of an atmosphere ...
Astrophysics
... because light from the object has to travel a greater distance through the atmosphere. Scattering effectively decreases the intensity of light coming from astronomical sources o Mie scattering: suspended dust particles with sizes similar to the light’s wavelength reflect the light o Rayleigh scatt ...
... because light from the object has to travel a greater distance through the atmosphere. Scattering effectively decreases the intensity of light coming from astronomical sources o Mie scattering: suspended dust particles with sizes similar to the light’s wavelength reflect the light o Rayleigh scatt ...
stars - acpsd
... for new stars begins in the Main Sequence. These mature stars undergo a remarkable transformation after they consume all the hydrogen in their core. With the hydrogen consumed, stars leave the main sequence and expand to form red giants. With this new stage, the fusion of helium begins to form heavi ...
... for new stars begins in the Main Sequence. These mature stars undergo a remarkable transformation after they consume all the hydrogen in their core. With the hydrogen consumed, stars leave the main sequence and expand to form red giants. With this new stage, the fusion of helium begins to form heavi ...
