World Library  
Flag as Inappropriate
Email this Article

Dark star (dark matter)

Article Id: WHEBN0014548330
Reproduction Date:

Title: Dark star (dark matter)  
Author: World Heritage Encyclopedia
Language: English
Subject: Dark matter, Katherine Freese, Star, Mixed dark matter, Halo mass function
Collection:
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Dark star (dark matter)

A dark star is a type of star that may have existed early in the universe before conventional stars were able to form. The stars would be composed mostly of normal matter, like modern stars, but a high concentration of neutralino dark matter within them would generate heat via annihilation reactions between the dark-matter particles. This heat would prevent such stars from collapsing into the relatively compact sizes of modern stars and therefore prevent nuclear fusion among the normal matter atoms from being initiated.

Under this model, a dark star is predicted to be an enormous cloud of hydrogen and helium ranging between 4 and 2000 astronomical units in diameter and with a surface temperature low enough that the emitted radiation would be invisible to the naked eye.

In the unlikely event that dark stars have endured to the modern era, they could be detectable by their emissions of gamma rays, neutrinos, and antimatter and would be associated with clouds of cold molecular hydrogen gas that normally wouldn’t harbor such energetic particles.

References

  • Douglas Spolyar, Katherine Freese, and Paolo Gondolo, "Dark matter and the first stars: a new phase of stellar evolution", Physical Review Letters, January (2008)
  • Katherine Freese, Paolo Gondolo, and Douglas Spolyar "The Effect of Dark Matter on the First Stars: A New Phase of Stellar Evolution", Proceedings of First Stars III, Santa Fe, New Mexico, 16–20 July (2007).
  • Moore, Nicole (2 Dec 2007). "Dark matter powered the first stars, physicists speculate" (Press release). University of Michigan. 
  • Siegel, Lee (2 Dec 2007). "Were the first stars dark?" (Press release). University of Utah. 
  • Spolyar, Douglas; Katherine Freese; Paolo Gondolo (2007-12-03). "Dark matter in newborn universe doused earliest stars". Physical Review Letters (Reported in Physorg.com). Retrieved 2007-12-04.  News Report
  • Katherine Freese, Peter Bodenheimer, Paolo Gondolo, Douglas Spolyar (2008). "Dark Stars: the First Stars in the Universe may be powered by Dark Matter Heating". arXiv:0812.4844 [astro-ph].
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.