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Stars generation

Payne, S.A., Page, R.H., Ebbers, C.A., Beach, R. J., 2001, Patent application Synthetic Guide Star Generation, IL- 10737... [Pg.248]

S tellar winds and planetary nebulas also play an important role in the chemical economy of our Galaxy, as they probably do in all the others. In particular, they enhance levels of nitrogen, carbon and heavy elements beyond iron (by the s process). For the main part, newly made elements are produced and launched into circulation by the last gasp of fight stars (generating planetary nebulas), stellar winds and supernova explosions. [Pg.169]

Assuming that the initial mass function is invariable, we may calculate the average production of the various star generations, born with the same metaUicity, and estimate their contribution to the evolution of the galaxy (see Appendix 4). The abundances produced by a whole population are not as discontinuous and irregular as those shown in the table of individual yields (Table A4.1). This is because the latter are averaged over the mass distribution. [Pg.227]

Perhaps the most novel aspect of SNl987a is the detection [6,7] of neutrinos from the production and cooling of a compact remnant. One hopes this is only the beginning of a new field of astronomy. The analysis I present here [5], parallel to the analysis of many other authors [23-28], finds remnant binding energy 2.0 0.5 X 1053 ergs and remnant mass 1.2 to 1.7 Mq consistent with what one expects for neutron star generation. An upper limit of 10-15 eV may also be inferred for the electron neutrino mass. [Pg.355]

Scientists hope to someday use controlled nuclear fusion to produce energy. Nuclear fusion, which involves the coming together of light nuclei to form heavier ones, is the process by which stars generate energy. In order... [Pg.48]

Nuclei with masses of 230 and greater, however, are formed in the course of multiple neutron absorptions followed by multiple beta decays. This so-called r-process occurs very rapidly and in the course of supernova explosions. Elements that are ejected in supernova explosions are later incorporated into new stars, generation after generation. In fact, the presence of certain heavy elements in the sun, and the fact that solar conditions cannot support the formation of these elements, has led to the conclusion that the sun is at least a second-generation star. [Pg.258]

Objects that radiate mainly at infrared wavelengths may do so because of their low temperature by astronomical standards. Objects that fall in this category start with stars of spectral classifications of K or cooler extending down the newly designated spectral classification of L. The sub-stellar classification ofBrown Dwarf links stars generating energy by nucleosynthesis to planets such as the giant and terrestrial planets in our own solar system. The planets such as the earth radiate like blackbodies at their surface... [Pg.143]

Nearly all types of normal (i.e., noncollapsed) single stars generate X-ray emission at some level. Stellar X-... [Pg.338]

Sometimes a star explodes in a supernova cast mg debris into interstellar space This debris includes the elements formed during the life of the star and these elements find their way into new stars formed when a cloud of matter collapses in on itself Our own sun is believed to be a second generation star one formed not only from hydrogen and helium but containing the elements formed in earlier stars as well... [Pg.6]

Heat generated in a star-connected stator winding... [Pg.281]

A generator neutral bus to form the generator star point. [Pg.929]

Tap-offs with a neutral CT, from star point of the generator, to the neutral grounding transformer (NOT). [Pg.930]

STAR The STAR program summarizes National Weather Services (NWS) meteorological data, by generating joint frequencies of 6 wind speeds, 16 wind directions, and 6 stability categories for the station and time period desired. [Pg.334]

In fact, the sun is not a first-generation main-sequence star since spectroscopic evidence shows the presence of many heavier elements thought to be formed in other types of stars and subsequently distributed throughout the galaxy for eventual accretion into later generations of main-sequence stars. In the presence of heavier elements, particularly carbon and nitrogen, a catalytic sequence of nuclear reactions aids the fusion of protons to helium (H. A. Bethe... [Pg.9]

In 1938 Bethe formulated the mechanism for energy generation in stars. This research grew out of his participation at the third Washington conference on theoretical physics in April 1938. The reaction... [Pg.143]


See other pages where Stars generation is mentioned: [Pg.202]    [Pg.1596]    [Pg.3]    [Pg.169]    [Pg.82]    [Pg.345]    [Pg.345]    [Pg.602]    [Pg.6]    [Pg.784]    [Pg.568]    [Pg.6]    [Pg.784]    [Pg.786]    [Pg.200]    [Pg.339]    [Pg.202]    [Pg.1596]    [Pg.3]    [Pg.169]    [Pg.82]    [Pg.345]    [Pg.345]    [Pg.602]    [Pg.6]    [Pg.784]    [Pg.568]    [Pg.6]    [Pg.784]    [Pg.786]    [Pg.200]    [Pg.339]    [Pg.2794]    [Pg.431]    [Pg.668]    [Pg.707]    [Pg.733]    [Pg.945]    [Pg.6]    [Pg.8]    [Pg.8]    [Pg.11]    [Pg.143]    [Pg.144]    [Pg.595]    [Pg.713]    [Pg.857]   
See also in sourсe #XX -- [ Pg.114 ]




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