Dark star (dark matter)

From the Science Archives, the open-project database of science information
Jump to navigation Jump to search


Template:Expert needed 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.[1]

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.[2]

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 would not harbor such energetic particles.[3][2]

Notes[edit]

  1. Spolyar, Douglas; Freese, Katherine; Gondolo, Paolo (2008). "Dark matter and the first stars: a new phase of stellar evolution". Physical Review Letters 100 (5): 051101. arXiv:0705.0521. Bibcode 2008PhRvL.100e1101S. doi:10.1103/PhysRevLett.100.051101. PMID 18352355.
  2. 2.0 2.1 Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  3. Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).


Add your comment
The Science Archives welcomes all comments. If you do not want to be anonymous, register or log in. It is free.


As a reminder, article comments are only for discussions on how to improve the article. Please direct other comments to a user's talk page. Please be formal and do not use excessive uppercase. Please be advised you may receive an automatic block if you break the article comments policy. For information regarding what is acceptable/not acceptable in article comments, please message Icons-flag-ru.png Joey (talk), Natalia (talk), Icons-flag-fr.png ynoss (talk), or Icons-flag-ca.png Daniel (older account/talk).


Bibliography[edit]

  • Freese, Katherine; Gondolo, Paolo; Spolyar, Douglas (2008). "The Effect of Dark Matter on the First Stars: A New Phase of Stellar Evolution". AIP Conference Proceedings 990: 42-44. arXiv:0709.2369. Bibcode 2008AIPC..990...42F. doi:10.1063/1.2905656.
  • Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
  • Freese, Katherine; Bodenheimer, Peter; Gondolo, Paolo; Spolyar, Douglas (2008). "Dark Stars: the First Stars in the Universe may be powered by Dark Matter Heating". AIP Conference Proceedings 1166: 33-38. arXiv:0812.4844. Bibcode 2009AIPC.1166...33F. doi:10.1063/1.3232192.
{{{1}}}
Observation data
Epoch {{{epoch}}}      Equinox
Constellation {{{3}}}
{{{component1}}}
Right ascension {{{ra1}}}
Declination {{{dec1}}}
Apparent magnitude (V) {{{appmag_v1}}}
{{{component2}}}
Right ascension {{{ra2}}}
Declination {{{dec2}}}
Apparent magnitude (V) {{{appmag_v2}}}
Characteristics
Evolutionary stage {{{9}}}
Spectral type {{{7}}}
Astrometry
Distance{{{4}}} ly
Details
Radius{{{5}}} R
Diameter{{{5}}} D
Luminosity (bolometric){{{11}}} L
Temperature{{{8}}} K
Other designations
{{{1}}}, {{{2}}}
{{{1}}}, also known as {{{2}}}, is a star located in the constellation {{{3}}}. It is located {{{4}}} light years away from the Earth. {{{1}}} has a diameter of {{{5}}} D, making it around the size of the orbit of {{{6}}}. {{{1}}} has a stellar class of {{{7}}} and a temperature of {{{8}}} degrees Kelvin; it is a {{{9}}} that is currently burning {{{10}}} within its core. {{{1}}} is around {{{11}}} times brighter than the Sun. {{{12}}}{{{13}}}

References[edit]

<comments />
As a reminder, article comments are only for discussions on how to improve the article. Please direct other comments to a user's talk page. Please be formal and do not use excessive uppercase. Please be advised you may receive an automatic block if you break the article comments policy. For information regarding what is acceptable/not acceptable in article comments, please message Icons-flag-ru.png Joey (talk), Natalia (talk), Icons-flag-fr.png ynoss (talk), or Icons-flag-ca.png Daniel (older account/talk).