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| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Perivolaropoulos, Leandros | en |
| dc.date.accessioned | 2015-11-24T18:31:40Z | - |
| dc.date.available | 2015-11-24T18:31:40Z | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/16500 | - |
| dc.rights | Default Licence | - |
| dc.title | COBE versus cosmic strings: An Analytical model | en |
| heal.type | journalArticle | - |
| heal.type.en | Journal article | en |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.access | campus | - |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών | el |
| heal.publicationDate | 1993 | - |
| heal.abstract | We construct a simple analytical model to study the effects of cosmic strings on the microwave background radiation. Our model is based on counting random multiple impulses inflicted on photon trajectories by the string network between the time of recombination and today. We construct the temperature auto-correlation function and use it to obtain the effective power spectrum index n, the rms-quadrupole-normalized amplitude $Q_{rms-PS}$ and the rms temperature variation smoothed on small angular scales. For the values of the scaling solution parameters obtained in Refs.\cite{bb90},\cite{as90} we obtain $n=1.14 \pm 0.5$, $Q_{rms-PS}=(4.5\pm 1.5) G\mu$ and $({{\Delta T}\over T})_{rms}=5.5 G\mu$. Demanding consistency of these results with the COBE data leads to $G\mu=(1.7 \pm 0.7)\times 10~{-6}$ (where $\mu$ is the string mass per unit length), in good agreement with direct normalizations of $\mu$ from observations. | en |
| heal.journalName | Phys.Lett. | en |
| heal.journalType | peer reviewed | - |
| heal.fullTextAvailability | TRUE | - |
| Appears in Collections: | Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά) | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| perivolaropoulos-1992-COBE versus cosmic strings An Analytical model.pdf | 136.9 kB | Adobe PDF | View/Open Request a copy |
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