Results 141 to 150 of about 167,251 (265)

Supernova Ejecta with Crystalline Silicate Dust in the Supernova Remnant MSH 15–52

open access: yesThe Astrophysical Journal
IRAS 15099-5856 in the young supernova remnant (SNR) MSH 15−52 is the first and only SNR-associated object with crystalline silicate dust detected so far, although its nature and the origin of the crystalline silicate are still unclear. In this paper, we
Hyun-Jeong Kim   +2 more
doaj   +1 more source

Searches for other vacua. Part I. Bubbles in our universe

open access: yesJournal of High Energy Physics, 2019
We discuss models in which vacua other than our own can be directly observed in the present universe. Models with density-dependent vacuum structure can give rise to ‘non-lethal’-vacua: vacua with lower energy-density than our vacuum, but only in regions
Anson Hook, Junwu Huang
doaj   +1 more source

Radioactivity in Supernova Remnants.

open access: yesThe Astrophysical Journal, 1965
We calculate implications of the idea developed by Burbidge et al. that the nearly exponential decrease after the (irst 100 days of the light-curves of Type i supernovae is due to nuclear energy released by the spontaneous fission of Cf354. Uncertainty of the correctness of the Cf-hypothesis qualifies any interpretation of (1) supernovae light-curves, (
Clayton, Donald D, Craddock, W L
openaire   +2 more sources

Distances to Recent Near-Earth Supernovae from Geological and Lunar 60Fe

open access: yesThe Astrophysical Journal
Near-Earth supernova blasts which engulf the solar system have left traces of their ejecta in the geological and lunar records. There is now a wealth of data on live radioactive ^60 Fe pointing to a supernova at 3 Myr ago, as well as the recent discovery
Adrienne F. Ertel, Brian D. Fields
doaj   +1 more source

Evidence of Gradients of Density and Magnetic Field in the Remnant of Tycho’s Supernova

open access: yesThe Astrophysical Journal
By using surface brightness maps of Tycho’s supernova remnant (SNR) in radio and X-rays, along with the properties of thermal and synchrotron emission, we have derived the postshock density and magnetic field (MF) strength distributions over the ...
Oleh Petruk   +7 more
doaj   +1 more source

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