Word
... fluctuations on different scales. These predictions can in principle be tested and the current "bestbet" (though I wouldn't put money on it) is known as Cold Dark Matter. We can now begin to test directly the growth of density fluctuations in the Universe using our observations of the temperature va ...
... fluctuations on different scales. These predictions can in principle be tested and the current "bestbet" (though I wouldn't put money on it) is known as Cold Dark Matter. We can now begin to test directly the growth of density fluctuations in the Universe using our observations of the temperature va ...
cosmic ray transport and production in the galaxy: a
... back to their sources in the Galaxy. To make the calculation efficient for large arrays of equations for many cosmicray species, a matrix representing the composition of all cosmic-ray heavy nuclei and location is used. The results for abundance ratios of key elements such as B/C and sub-Fe/ Fe comp ...
... back to their sources in the Galaxy. To make the calculation efficient for large arrays of equations for many cosmicray species, a matrix representing the composition of all cosmic-ray heavy nuclei and location is used. The results for abundance ratios of key elements such as B/C and sub-Fe/ Fe comp ...
The Spiral Structure of the Milky Way
... Starting point: Map the intensity of neutral hydrogen along the Galactic plane for various Galactic longitudes. As a result of this procedure, it has been shown that the neutral hydrogen appears to be concentrated in the spiral arms of the Milky Way. ...
... Starting point: Map the intensity of neutral hydrogen along the Galactic plane for various Galactic longitudes. As a result of this procedure, it has been shown that the neutral hydrogen appears to be concentrated in the spiral arms of the Milky Way. ...
NUCLEOSYNTHESIS
... 4.2 Hydrogen burning . . . . . . . . . . . . . 4.3 Advanced nuclear burning phases . . . . . ...
... 4.2 Hydrogen burning . . . . . . . . . . . . . 4.3 Advanced nuclear burning phases . . . . . ...
Lecture 9
... What things are made of Sun: Mostly hydrogen (H) and helium (He). Jovian planets: Rich in H and He, low density. Terrestrial planets: Mostly rock and metal, high density. ...
... What things are made of Sun: Mostly hydrogen (H) and helium (He). Jovian planets: Rich in H and He, low density. Terrestrial planets: Mostly rock and metal, high density. ...
Resolved SPs : simulations
... The description of the details in the shape of the tracks, and the evolutionary lifetimes (use normalized independent variable) The description of photometric errors, blending and completeness (evaluate crowding conditions: if there is more than 1 star per resolution element the photometry is bad; c ...
... The description of the details in the shape of the tracks, and the evolutionary lifetimes (use normalized independent variable) The description of photometric errors, blending and completeness (evaluate crowding conditions: if there is more than 1 star per resolution element the photometry is bad; c ...
"Inner Oort cloud" -
... The Oort cloud is an immense spherical cloud surrounding the planetary system and extending approximately 3 light years, about 30 trillion kilometers from the Sun. This vast distance is considered the edge of the Sun's orb of physical, gravitational, or dynamical influence. Within the cloud, comets ...
... The Oort cloud is an immense spherical cloud surrounding the planetary system and extending approximately 3 light years, about 30 trillion kilometers from the Sun. This vast distance is considered the edge of the Sun's orb of physical, gravitational, or dynamical influence. Within the cloud, comets ...
astrocoursespring2012lec2-6
... Stars with lower masses comprise the yellow, orange, and red dwarfs on the lower-right part of the main sequence, where they remain for billions of years. As a star begins to exhaust the hydrogen fuel in its core, it evolves away from the main sequence toward the upper right and becomes a red giant ...
... Stars with lower masses comprise the yellow, orange, and red dwarfs on the lower-right part of the main sequence, where they remain for billions of years. As a star begins to exhaust the hydrogen fuel in its core, it evolves away from the main sequence toward the upper right and becomes a red giant ...
Magnetized Gravitational Collapse & Star Formation
... • Appearance of Keplerian disks requires breakdown of ideal MHD (Allen, Li, & Shu 2003; Shu, Galli, & Lizano 2005). • Annihilation of split monopole is replaced by multipoles of stellar field sustained by dynamo action. • Latter fields are measured in T Tauri stars through Zeeman broadening by Basri ...
... • Appearance of Keplerian disks requires breakdown of ideal MHD (Allen, Li, & Shu 2003; Shu, Galli, & Lizano 2005). • Annihilation of split monopole is replaced by multipoles of stellar field sustained by dynamo action. • Latter fields are measured in T Tauri stars through Zeeman broadening by Basri ...
1. Introduction - The National Academies of Sciences, Engineering
... emerges on scales of active regions down to intergranular lanes. However, properties such as diffusion and helicity, that must be assumed in these models are produced by small-scale turbulent processes and have not yet been measured. High spatial, temporal, and spectral resolution is needed to obser ...
... emerges on scales of active regions down to intergranular lanes. However, properties such as diffusion and helicity, that must be assumed in these models are produced by small-scale turbulent processes and have not yet been measured. High spatial, temporal, and spectral resolution is needed to obser ...
Presolar grain OC2
... upper limit for the 17O(p,)14N rate (+25%) and the lower limit for the 16O(p,)17F rate (-43%) ...
... upper limit for the 17O(p,)14N rate (+25%) and the lower limit for the 16O(p,)17F rate (-43%) ...
THE HABITABLE ZONE OF EARTH-LIKE PLANETS AROUND 47 UMA
... within the habitable zone (HZ). Typically, stellar HZs are defined as regions near the central star, where the physical conditions are favourable for liquid water to be available at the planet’s surface for a period of time long enough for biological evolution to occur [e.g., 10]. In the following, ...
... within the habitable zone (HZ). Typically, stellar HZs are defined as regions near the central star, where the physical conditions are favourable for liquid water to be available at the planet’s surface for a period of time long enough for biological evolution to occur [e.g., 10]. In the following, ...
Nucleosynthesis in asymptotic giant branch stars
... The Li production is a challenging physical process. It occurs via the PPII chain: 3 He(α , γ )7 Be(e− ν )7 Li. The production of Li requires high temperature to create 7 Be, and mixing to transport it to cooler region to enable electron capture. It seems that HBB can facilitate this process. But mo ...
... The Li production is a challenging physical process. It occurs via the PPII chain: 3 He(α , γ )7 Be(e− ν )7 Li. The production of Li requires high temperature to create 7 Be, and mixing to transport it to cooler region to enable electron capture. It seems that HBB can facilitate this process. But mo ...
File
... A _____________, on the other hand, is a large amount of gas and dust spread out in an immense volume. All stars begin their lives as parts of nebulas. ______________ can pull some of the gas and dust in a nebula together. The contracting cloud is then called a _________________________. P ...
... A _____________, on the other hand, is a large amount of gas and dust spread out in an immense volume. All stars begin their lives as parts of nebulas. ______________ can pull some of the gas and dust in a nebula together. The contracting cloud is then called a _________________________. P ...
Lecture 13 - BH Disks, Planet Formation
... energy is advected into the BH before it can be radiated: advection dominated accretion flow • Numerical models made clear that the extra energy produces a convectively unstable entropy gradient in the radial direction, as well as unbinding some of the gas entirely • convection dominated accretion f ...
... energy is advected into the BH before it can be radiated: advection dominated accretion flow • Numerical models made clear that the extra energy produces a convectively unstable entropy gradient in the radial direction, as well as unbinding some of the gas entirely • convection dominated accretion f ...
Dark Stars: Dark Matter annihilation can power the first stars
... high. The first stars are good candidates: good timing since density was higher in early times and good location at the center of DM halo • As star forms in the center of the halo, it gravitationally pulls in more DM. Treat via adiabatic contraction. • If the scattering cross section is large, eve ...
... high. The first stars are good candidates: good timing since density was higher in early times and good location at the center of DM halo • As star forms in the center of the halo, it gravitationally pulls in more DM. Treat via adiabatic contraction. • If the scattering cross section is large, eve ...
