Peculiar velocities and microwave background anisotropies from cosmic strings

Leandros Perivolaropoulos, Tanmay Vachaspati

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Using an analytic model, we show that the predictions of the cosmic string model for the peculiar velocities and the microwave background (MBR) anisotropy depend on similar combinations of string evolution parameters. Normalizing from the COBE detection of MBR anisotropy, and for certain reasonable values of string network evolution parameters, we find that the magnitude of predicted velocity flows is in good agreement with observations on small scales but is inconsistent with observations on large scales (> 50 h-1 Mpc). The cosmic Mach number obtained from the cosmic string scenario is found to depend on a single network evolution parameter and is consistent with observations on scales 5 h-1 Mpc to 20 h-1 Mpc.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume423
Issue number2 PART 2
StatePublished - Mar 10 1994
Externally publishedYes

Fingerprint

anisotropy
strings
microwaves
Cosmic Background Explorer satellite
flow velocity
normalizing
Mach number
prediction
microwave
parameter
predictions
detection

Keywords

  • Cosmic microwave background
  • Cosmic strings
  • Large-scale structure of universe

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Peculiar velocities and microwave background anisotropies from cosmic strings. / Perivolaropoulos, Leandros; Vachaspati, Tanmay.

In: Astrophysical Journal, Vol. 423, No. 2 PART 2, 10.03.1994.

Research output: Contribution to journalArticle

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