Results 191 to 200 of about 76,004 (221)
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The anti-nuclei production of our galaxy
Nuclear Physics B - Proceedings Supplements, 1999Abstract The discovery of a single anti-helium nucleus in the cosmic ray flux would definitely point toward the existence of stars and even of entire galaxies made of anti-matter. The presence of anti-nuclei in cosmic rays has actually profound implications on the fundamental question of the baryon asymmetry of the universe.
Salati, P., Chardonnet, P., Orloff, Jean
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Active Galaxies And Their Nuclei
2004Abstract At a conference held in Manchester in 1984, Bernard Pagel aptly paraphrased George Orwell by commenting that”all galaxies are active, but some are more active than others.” Activity in galaxies manifests itself in a variety of ways.
T W Hartquist, J E Dyson, D P Ruffle
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MILLER-UREY SYNTHESIS IN THE NUCLEI OF GALAXIES
Astrophysics and Space Science, 1998The most promising venues for the synthesis of prebiotic molecules by Miller-Urey type processes may be found near the centres of galaxies. Explosions of supermassive stars would produce the basic chemical elements necessary to make molecules in high-density mass flows that are then acted upon by ionizing radiation, thus simulating the conditions ...
N.C. Wickramasinghe, F. Hoyle
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Megamasers in Nuclei of Galaxies
1986Powerful maser emission has been detected in a small number of galaxies. Most of these have Seyfert or starburst nuclei and exhibit other signs of galactic activity. Broad OH emission has been seen in the prototype megamaser IC 4553 (= Arp 220) (Baan, Wood, and Haschick 1982; Baan and Haschick 1984; Norris et al. 1985), NGC 3690 and Mrk 231 (Baan 1985).
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Studies of galaxies with peculiar nuclei
Astrophysics and Space Science, 1975Photometric, morphological and spectral grounds suggest that the peculiar nuclei regions of NGC 1097, 1672, 2997, 5236, and 7552 are composed basically of a normal nucleus surrounded by several large but otherwise normal (Te∼8000 K,Ne∼1000/cm3) H II regions.
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A close quasar pair in a disk–disk galaxy merger at z = 2.17
Nature, 2023Xin Liu, Yue Shen, Masamune Oguri
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Heating Hot Atmospheres with Active Galactic Nuclei
Annual Review of Astronomy and Astrophysics, 2007Paul E J Nulsen
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