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cosmic strings - possible detections

  • AstroPh:0410073 - Kibble discusses new interest in cosmic strings, and the two following observational hints. The first one seems quite serious, at first glance:

Cosmic String Detection

  • In http://de.arxiv.org/abs/astro-ph/0410073 Kibble discusses the http://de.arxiv.org/abs/astro-ph/302547 possible detection of a cosmic string which seems to gravitationally lens a background galaxy (Sazhin et al.) In http://de.arxiv.org/abs/astro-ph/0406516 the extra pairs of lensed galaxies predicted by the hypothesis are discussed.
  • Aim: Understand the basics about (1) cosmic strings, (2) gravitational lensing versus cosmic string lensing, and test the hypothesis
    • Calculate the probability of seeing the original pair by chance
    • Check whether the statistics of expected numbers of lensed images are correct
    • Propose an independent test of the hypothesis, e.g. using radio observations and prepare an observing proposal

frown

  • AstroPh:0601494 Sazhin et al. The true nature of CSL-1 - two identical galaxies merging - have non-identical tidal tails showing merging

how many cosmic strings could there be?

szukanie kandydatów cosmic-string-lensed galaxies

WMAP vs cosmic shear in galaxies

  • HepPh:0405218 A First Glimpse of String Theory in the Sky? Steen Hannestad (SDU, Nordita), Laura Mersini-Houghton (UNC-Chapel Hill)
    • 1 cosmic string \Rightarrow shear from gravitational lensing, e.g. WikipediaEn:Abell_2218 - efekt na mapę galaktyków
    • 1 cosmic string \Rightarrow efekt na mapa WMAPa
    • Więc: powinna być korelacji
Topic revision: r2 - 28 Aug 2006, BoudRoukema
 
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