Download PDF by T. W. Hartquist: Blowing Bubbles in the Cosmos: Astronomical Winds, Jets, and

By T. W. Hartquist

ISBN-10: 0195130545

ISBN-13: 9780195130546

Many astrophysical our bodies produce winds, jets or explosions, which blow striking bubbles. From a nonmathematical, unifying standpoint, in line with the knowledge of bubbles, the authors deal with some of the most enjoyable themes in glossy astrophysics together with supernovae, the construction of constitution within the Early Universe, the environments of supermassive black holes and gamma-ray bursts.

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Additional resources for Blowing Bubbles in the Cosmos: Astronomical Winds, Jets, and Explosions

Example text

High temperatures are needed in order for the protons to have enough energy to overcome the mutual repulsion due to their similar positive charges. Energy generated by the reactions is transported outward through the star and finally leaves the surface of the star as radiation. The temperature in a star decreases with distance from its center. We observe the surface temperature of the Sun to be about 6,000 K and yet we estimate the interior temperature to be several millions of degrees. The laws of thermodynamics tell us that heat travels from high-temperature regions to lower temperature regions.

T. Russell, 91–128. Cambridge: Cambridge University Press, 1995. 46 BLOWING BUBBLES IN THE COSMOS 5 STAR FORMATION AND LOW-MASS YOUNG STELLAR OBJECTS Rotation, in conjunction with a magnetic field, drives the outflow of a lowmass young stellar object (LMYSO), a young star with a mass a few times that of the Sun or less. The star formation process determines how a LMYSO rotates. Consequently, the nature of the outflow is intimately connected with the entire history of the LMYSO’s formation. Therefore, in this chapter we begin with a review of observations of giant molecular clouds (GMCs), which are the sites of most stellar birth in the Galaxy, and also provide an overview of the standard picture of the formation of a LMYSO.

This is because the increased radiation takes a thousand years or so to get out of the star and the effects of 32 BLOWING BUBBLES IN THE COSMOS increased energy generation over a time of a few seconds are smoothed out. The core, which is now made up of mainly carbon with some oxygen, contracts again and becomes degenerate. There is still helium burning in a shell around the core. , in the direction of increasing surface temperatures) of those associated with the red giant stars in the H-R diagram depicted in figure 3-3, and these stars are called AGB (asymptotic giant branch) stars.

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Blowing Bubbles in the Cosmos: Astronomical Winds, Jets, and Explosions by T. W. Hartquist

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