PPT
... Zhang, Tong-Jie; Pen, Ue-Li; Zhang, Pengjie; Dubinski, John The Astrophysical Journal [ApJ], Volume 598, Issue 2, pp. 818-826. (12/2003) ...
... Zhang, Tong-Jie; Pen, Ue-Li; Zhang, Pengjie; Dubinski, John The Astrophysical Journal [ApJ], Volume 598, Issue 2, pp. 818-826. (12/2003) ...
... – Stars travel around the center of the galaxy in their own orbits – Stars and gas traveling in the disc will bunch up as they enter an arm and will spread out as they leave – This bunching is similar to that of cars on a freeway except gravity causes the bunching of the stars – Gas entering the arm ...
The Big Bang and Stellar Evolution
... whether on earth or in space, cannot push itself into balls. Once together, a star maintains its gravity quite well, but there is no way for nature to produce one. Getting it together in the first place is the problem. Gas floating in a vacuum cannot form itself into stars. Once a star exists, it w ...
... whether on earth or in space, cannot push itself into balls. Once together, a star maintains its gravity quite well, but there is no way for nature to produce one. Getting it together in the first place is the problem. Gas floating in a vacuum cannot form itself into stars. Once a star exists, it w ...
The Flow of Energy Out of the Sun
... Exercise 3: Continuum .................................................................................................................. 6 Exercise 4: Experiment ................................................................................................................. 7 Exercise 5: Flow ..... ...
... Exercise 3: Continuum .................................................................................................................. 6 Exercise 4: Experiment ................................................................................................................. 7 Exercise 5: Flow ..... ...
PowerPoint 프레젠테이션
... Unfortunately, no firm constraints on the equation of state are possible since systematic deviations in the radial-velocity curve do not allow us to exclude a mass around 1.4 Msun as found for other neutron stars.” [Barziv et al. 2001] Actual center of mass ...
... Unfortunately, no firm constraints on the equation of state are possible since systematic deviations in the radial-velocity curve do not allow us to exclude a mass around 1.4 Msun as found for other neutron stars.” [Barziv et al. 2001] Actual center of mass ...
Numerical models of sunspot formation and fine structure
... that are the consequence of the strong stratification of the system, while the physical ingredients are well known. In the bulk of the convection zone, singlefluid MHD, combined with an ideal gas equation of state, is sufficient—when approaching the photosphere, the equation of state has to take into c ...
... that are the consequence of the strong stratification of the system, while the physical ingredients are well known. In the bulk of the convection zone, singlefluid MHD, combined with an ideal gas equation of state, is sufficient—when approaching the photosphere, the equation of state has to take into c ...
surface temperature on the moon
... Over the years, several models have been developed by different researchers to model the heat conduction of lunar regolith. Wesselink [1948] first applied the well known heat conduction equation to an infinitesimal element of volume at the lunar surface. As the time goes by, the conditions that the ...
... Over the years, several models have been developed by different researchers to model the heat conduction of lunar regolith. Wesselink [1948] first applied the well known heat conduction equation to an infinitesimal element of volume at the lunar surface. As the time goes by, the conditions that the ...
The Spectra of Stars
... Hot, dense lower photosphere of a star is dense lower photosphere of a star is surrounded by thinner (but still fairly hot) atmosphere. atmosphere – Produces an Absorption Line spectrum. – Lines come from the elements in the stellar Lines come from the elements in the stellar atmosphere. ...
... Hot, dense lower photosphere of a star is dense lower photosphere of a star is surrounded by thinner (but still fairly hot) atmosphere. atmosphere – Produces an Absorption Line spectrum. – Lines come from the elements in the stellar Lines come from the elements in the stellar atmosphere. ...
Spectroscopy – Lecture 1
... It also influences the strength of stellar lines → more continous absorption means a thinner photosphere with few atoms to make spectral lines. Also, before we compute a theoretical spectrum, you need to compute an atmospheric model, and this also depends on kn. ...
... It also influences the strength of stellar lines → more continous absorption means a thinner photosphere with few atoms to make spectral lines. Also, before we compute a theoretical spectrum, you need to compute an atmospheric model, and this also depends on kn. ...
Eclipse Box Activity Guide - Girl Scouts of Northern California
... Girl Scout Levels: Each activity shows the recommended Girl Scout levels. The Table of Contents has a chart that shows the same information. You know best what will be fun for your girls! Materials List: Each activity includes a materials list of what is provided in the Eclipse Box, and what you nee ...
... Girl Scout Levels: Each activity shows the recommended Girl Scout levels. The Table of Contents has a chart that shows the same information. You know best what will be fun for your girls! Materials List: Each activity includes a materials list of what is provided in the Eclipse Box, and what you nee ...
Transit of Luyten 726-8 within 1 ly from Epsilon Eridani
... Kuiper belt starting at 35 AU from the star. It should also have the outer cloud of long-period comets more massive than the Oort cloud in our solar system. The litterature on ε Eri is very extensive, cf. 1159 references currently available in SIMBAD database for additional details. BL/UV Ceti was d ...
... Kuiper belt starting at 35 AU from the star. It should also have the outer cloud of long-period comets more massive than the Oort cloud in our solar system. The litterature on ε Eri is very extensive, cf. 1159 references currently available in SIMBAD database for additional details. BL/UV Ceti was d ...
Supervisors
... Introduction Stellar spectra provide most of the information that is known about the stars, such as their chemical composition, rotation, magnetic fields etc. The light that makes up the spectrum of a star is radiated by its outer layers that are called a stellar atmosphere. Understanding stellar a ...
... Introduction Stellar spectra provide most of the information that is known about the stars, such as their chemical composition, rotation, magnetic fields etc. The light that makes up the spectrum of a star is radiated by its outer layers that are called a stellar atmosphere. Understanding stellar a ...
The formation of stars and planets
... Small grains: high opacity at short wavelength, where they absorb radiation, low opacity at long wavelength where they ...
... Small grains: high opacity at short wavelength, where they absorb radiation, low opacity at long wavelength where they ...
From The Sun To Beyond Pluto
... solar system flashcards quizlet - start studying the solar system learn vocabulary the total mass of all the planets is much less than the mass of the sun true far beyond pluto in the, nasa what is pluto - what is pluto 06 02 icy objects that orbit the sun beyond neptune pluto is it takes pluto 248 ...
... solar system flashcards quizlet - start studying the solar system learn vocabulary the total mass of all the planets is much less than the mass of the sun true far beyond pluto in the, nasa what is pluto - what is pluto 06 02 icy objects that orbit the sun beyond neptune pluto is it takes pluto 248 ...
The Evolution of Elements and Isotopes
... has been identified in a certain class of red giant stars (AGB The isotopes found today in our solar system (Lodders et stars) and in the cores of massive stars, where heliumal. 2009) were formed in numerous cycles of nucleosynburning nuclear reactions can produce neutrons that are thesis over the ~ ...
... has been identified in a certain class of red giant stars (AGB The isotopes found today in our solar system (Lodders et stars) and in the cores of massive stars, where heliumal. 2009) were formed in numerous cycles of nucleosynburning nuclear reactions can produce neutrons that are thesis over the ~ ...
ppt - ciera
... Chandra and XMM fields reveals no new 530 s pulsars, so there is a <0.5% chance of finding a magnetar in any field (Nechita, Gaensler, Muno, et al. in prep). • The pulsar is well within the cluster, with a <10% chance of being an unrelated X-ray source. ...
... Chandra and XMM fields reveals no new 530 s pulsars, so there is a <0.5% chance of finding a magnetar in any field (Nechita, Gaensler, Muno, et al. in prep). • The pulsar is well within the cluster, with a <10% chance of being an unrelated X-ray source. ...
Quasar feedback revealed by giant molecular outflows
... based on the absorption molecular lines detected by Herschel. By assuming that this gas is uniformly distributed in a spherical volume of 0.6 kpc in radius, its inferred density is ∼25 cm−3 . Because the outflow velocity is at least 700 km s−1 , the inferred mass outflow rate is dM(H2 )/dt = 2200 M ...
... based on the absorption molecular lines detected by Herschel. By assuming that this gas is uniformly distributed in a spherical volume of 0.6 kpc in radius, its inferred density is ∼25 cm−3 . Because the outflow velocity is at least 700 km s−1 , the inferred mass outflow rate is dM(H2 )/dt = 2200 M ...
Fluid Instabilities
... 3-D Navier-Stokes equations that is sensitive to initial data and which occurs as a result of successive instabilities of laminar flows as a bifurcation parameter is increased through a succession of values. ...
... 3-D Navier-Stokes equations that is sensitive to initial data and which occurs as a result of successive instabilities of laminar flows as a bifurcation parameter is increased through a succession of values. ...