Cosmic Explosions

Cosmic Explosions
Author :
Publisher : Universal-Publishers
Total Pages : 206
Release :
ISBN-10 : 9781581122336
ISBN-13 : 1581122330
Rating : 4/5 (330 Downloads)

Book Synopsis Cosmic Explosions by : Edo Berger

Download or read book Cosmic Explosions written by Edo Berger and published by Universal-Publishers. This book was released on 2004 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: The diversity of stellar death is revealed in the energy, velocity and geometry of the explosion debris ("ejecta''). Using multi-wavelength observations of gamma-ray burst (GRB) afterglows I show that GRBs, arising from the death of massive stars, are marked by relativistic, collimated ejecta ("jets'') with a wide range of opening angles. These results suggest that various cosmic explosions are powered by a common energy source, an "engine'' (possibly an accreting stellar-mass black hole), with their diverse appearances determined solely by the variable high velocity output. On the other hand, using radio observations I show that local type Ibc core-collapse supernovae generally lack relativistic ejecta and are therefore not powered by engines. Instead, the highest velocity debris in these sources, typically with a velocity lower than 100,000 km/sec, are produced in the (effectively) spherical ejection of the stellar envelope. The relative rates of engine- and collapse-powered explosions suggest that the former account for only a small fraction of the stellar death rate. Using the first radio and submillimeter observations of GRB hosts, I show that some are extreme starburst galaxies with the bursts directly associated with the regions of most intense star formation. I suggest, by comparison to other well-studied samples, that GRBs preferentially occur in sub-luminous, low mass galaxies, undergoing the early stages of a starburst process. If confirmed with future observations, this trend will place GRBs in the forefront of star formation and galaxy evolution studies.

Cosmic Explosions Related Books

Cosmic Explosions
Language: en
Pages: 206
Authors: Edo Berger
Categories: Science
Type: BOOK - Published: 2004 - Publisher: Universal-Publishers

GET EBOOK

The diversity of stellar death is revealed in the energy, velocity and geometry of the explosion debris ("ejecta''). Using multi-wavelength observations of gamm
Cosmic Explosions
Language: en
Pages: 575
Authors: J.M. Marcaide
Categories: Science
Type: BOOK - Published: 2005-11-21 - Publisher: Springer Science & Business Media

GET EBOOK

Supernovae are among the most energetic phenomena in the Universe and - lated to almost all aspects of modern astrophysics including starburst gal- ies, cosmic
The Many Facets of Cosmic Explosions
Language: en
Pages: 265
Authors: Alicia Soderberg
Categories: Mathematics
Type: BOOK - Published: 2007-10 - Publisher: Universal-Publishers

GET EBOOK

Over the past few years, long-duration gamma-ray bursts (GRBs), including the subclass of X-ray flashes (XRFs), have been revealed to be a rare variety of Type
Cosmic Explosions in Three Dimensions
Language: en
Pages: 396
Authors: Peter Höflich
Categories: Science
Type: BOOK - Published: 2004-12-16 - Publisher: Cambridge University Press

GET EBOOK

Supernovae and gamma-ray bursts are the strongest explosions in the Universe. Observations show that, rather than being symmetrical, they are driven by strong j
Extreme Explosions
Language: en
Pages: 373
Authors: David S. Stevenson
Categories: Science
Type: BOOK - Published: 2013-09-05 - Publisher: Springer Science & Business Media

GET EBOOK

What happens at the end of the life of massive stars? At one time we thought all these stars followed similar evolutionary paths. However, new discoveries have