Studying explosive phenomena in astrophysics by the example of
... stars (Population III stars) formed, but according to modern theory of stellar evolution these stars should be very massive (about 100 M⊙ ). Population III stars also have a potential to produce probably most energetic flashes in the Universe – gamma-ray bursts (GRBs). GRBs may provide one of the mo ...
... stars (Population III stars) formed, but according to modern theory of stellar evolution these stars should be very massive (about 100 M⊙ ). Population III stars also have a potential to produce probably most energetic flashes in the Universe – gamma-ray bursts (GRBs). GRBs may provide one of the mo ...
Document
... The density profile was taken to be the same as in the jet for simplicity, but with different value at r0. ...
... The density profile was taken to be the same as in the jet for simplicity, but with different value at r0. ...
ICP-MS and Planetary Geosciences
... region of interstellar space where the Sun formed. For example, the variability of the amount of 60 Fe and 26 Al (both are short-lived, now extinct, isotopes) might conceivably mean that 60 Fe was added to our Solar System a million years after it formed, but when the solar nebula was still present. ...
... region of interstellar space where the Sun formed. For example, the variability of the amount of 60 Fe and 26 Al (both are short-lived, now extinct, isotopes) might conceivably mean that 60 Fe was added to our Solar System a million years after it formed, but when the solar nebula was still present. ...
Problem Set 2 for Astro 322 Read chapter 24.2. (Some of this
... For the Milky Way, 1.5 × 1010 L = 2πh2R I(R = 0), and I(R) = I(R = 0) exp[−R/hR ]. We find I(R = 0) = LD /(2πh2R ) = 1.5 × 1010 L /(2π(4000pc)2 ) = 149 L pc−2 . Then I(R = 8kpc) = I(R = 0)exp(−8/4) = 20.2 L pc−2 . We note that this M/LV ratio is integrated over all z, through the thick disk as w ...
... For the Milky Way, 1.5 × 1010 L = 2πh2R I(R = 0), and I(R) = I(R = 0) exp[−R/hR ]. We find I(R = 0) = LD /(2πh2R ) = 1.5 × 1010 L /(2π(4000pc)2 ) = 149 L pc−2 . Then I(R = 8kpc) = I(R = 0)exp(−8/4) = 20.2 L pc−2 . We note that this M/LV ratio is integrated over all z, through the thick disk as w ...
on limiting the thickness of the solar tachocline
... hκ , γ is the adiabatic index, and all other variables take their usual meanings. In all of the above equations, reference state variables are denoted by an overbar. Equation (4) represents the energy equation written as a temperature equation, where ur represents the radial velocity. The first term ...
... hκ , γ is the adiabatic index, and all other variables take their usual meanings. In all of the above equations, reference state variables are denoted by an overbar. Equation (4) represents the energy equation written as a temperature equation, where ur represents the radial velocity. The first term ...
NATS 1311 From the Cosmos to Earth
... relative sizes of a lowmass star as a mainsequence star, a red giant, and a heliumburning star. The scale is not precise; in particular, the size of the main-sequence star is even smaller compared to the ...
... relative sizes of a lowmass star as a mainsequence star, a red giant, and a heliumburning star. The scale is not precise; in particular, the size of the main-sequence star is even smaller compared to the ...
Oscillation Modes of Strange Quark Stars with a Strangelet Crust
... Figure 1. Mass-Radius relation for homogeneous quark stars described by the EoS (Eq. 1). The interaction parameter a4 =0.7 and ms =100 MeV. Measured limits on the mass of PSR J1614-2230 (1.97±0.04 M ) and PSR J0348-0432 (2.01±0.04 M ) are shown. ...
... Figure 1. Mass-Radius relation for homogeneous quark stars described by the EoS (Eq. 1). The interaction parameter a4 =0.7 and ms =100 MeV. Measured limits on the mass of PSR J1614-2230 (1.97±0.04 M ) and PSR J0348-0432 (2.01±0.04 M ) are shown. ...
transparencies
... For GRBs of group xI and xII, we can estimate the redshift needed for being compliant with the B&G relation • Proof on the bursts defining the ...
... For GRBs of group xI and xII, we can estimate the redshift needed for being compliant with the B&G relation • Proof on the bursts defining the ...
Transient events in the EUV transition region and chromosphere
... extreme ultraviolet emission, observed by the cds instrument on soho, are discussed. Numerous transient brightenings are observed in network features in both a transition region line (O v 629.73 Å) and a chromospheric line (He i 584.33 Å), indicating a dynamic coupling between the chromospheric an ...
... extreme ultraviolet emission, observed by the cds instrument on soho, are discussed. Numerous transient brightenings are observed in network features in both a transition region line (O v 629.73 Å) and a chromospheric line (He i 584.33 Å), indicating a dynamic coupling between the chromospheric an ...
![On the trend of [Mg/Fe] among giant elliptical galaxies](http://s1.studyres.com/store/data/024377891_1-9ed25030908d9b00f4379170c2bcef77-300x300.png)
On the trend of [Mg/Fe] among giant elliptical galaxies
... Davies et al. 1993), indicating that the Mg/Fe ratio should increase with galactic luminosity and mass. We transform the abundance of Fe, as predicted by classic wind models and alternative models for the chemical evolution of elliptical galaxies, into the metallicity indices M g2 and < F e >, by me ...
... Davies et al. 1993), indicating that the Mg/Fe ratio should increase with galactic luminosity and mass. We transform the abundance of Fe, as predicted by classic wind models and alternative models for the chemical evolution of elliptical galaxies, into the metallicity indices M g2 and < F e >, by me ...
Cosmoclimatology: a new theory emerges
... of clouds on Antarctica, and meteorologists at far southern latitudes confirm it by observation. Greenland too has an ice sheet, but it is smaller and not so white. And while conditions in Greenland are coupled to the general climate of the northern hemisphere, Antarctica is largely isolated by vort ...
... of clouds on Antarctica, and meteorologists at far southern latitudes confirm it by observation. Greenland too has an ice sheet, but it is smaller and not so white. And while conditions in Greenland are coupled to the general climate of the northern hemisphere, Antarctica is largely isolated by vort ...
A Reservoir of Ionized Gas in the Galactic Halo to Sustain Star
... of the iHVCs seen toward the AGNs and stars is moreover remarkably similar considering our better sampled north Galactic sky (Fig. 2). These and the fact that the H I HVCs and iHVCs are now known to be at similar distances strongly suggest they are all related, probing separate phases where the H I ...
... of the iHVCs seen toward the AGNs and stars is moreover remarkably similar considering our better sampled north Galactic sky (Fig. 2). These and the fact that the H I HVCs and iHVCs are now known to be at similar distances strongly suggest they are all related, probing separate phases where the H I ...
Cosmic Microwave Background Anisotropies:
... •Curvature or dark energy can be only important in very late time for evolution of the Universe Since late time=larger horizon size, ISW affects Cl on very small l’s Late ISW •However, when the universe became matter domination from radiation domination, potential decayed! This epoch is near recombi ...
... •Curvature or dark energy can be only important in very late time for evolution of the Universe Since late time=larger horizon size, ISW affects Cl on very small l’s Late ISW •However, when the universe became matter domination from radiation domination, potential decayed! This epoch is near recombi ...