Abstract
We consider an alternative scenario of inflation which can account for a spatially open universe. It is similar to the old inflation in which the bubble nucleation occurs in the sea of the false vacuum, but it differs from the old inflation in that the second slow rollover inflation occurs inside a nucleated bubble. Hence, our observable universe is entirely contained in one nucleated bubble. The significance of the scenario is that apart from a variance caused by model parameters, it gives us a definite prediction on the spectrum of the primordial density perturbations, and hence it is observationally testable. Here we investigate the spectrum of cosmic microwave background anisotropies on large angular scales. We find that the contribution from peculiar modes which never appear in the usual harmonic analysis is significant in the case Ω0 ≲ 0.1.
| Original language | English |
|---|---|
| Pages (from-to) | 412-418 |
| Number of pages | 7 |
| Journal | Astrophysical Journal |
| Volume | 455 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Dec 20 1995 |
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All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
Cite this
Large-angle cosmic microwave background anisotropy in an open universe in the one-bubble inflationary scenario. / Yamamoto, Kazuhiro; Sasaki, Misao; Tanaka, Takahiro.
In: Astrophysical Journal, Vol. 455, No. 2, 20.12.1995, p. 412-418.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Large-angle cosmic microwave background anisotropy in an open universe in the one-bubble inflationary scenario
AU - Yamamoto, Kazuhiro
AU - Sasaki, Misao
AU - Tanaka, Takahiro
PY - 1995/12/20
Y1 - 1995/12/20
N2 - We consider an alternative scenario of inflation which can account for a spatially open universe. It is similar to the old inflation in which the bubble nucleation occurs in the sea of the false vacuum, but it differs from the old inflation in that the second slow rollover inflation occurs inside a nucleated bubble. Hence, our observable universe is entirely contained in one nucleated bubble. The significance of the scenario is that apart from a variance caused by model parameters, it gives us a definite prediction on the spectrum of the primordial density perturbations, and hence it is observationally testable. Here we investigate the spectrum of cosmic microwave background anisotropies on large angular scales. We find that the contribution from peculiar modes which never appear in the usual harmonic analysis is significant in the case Ω0 ≲ 0.1.
AB - We consider an alternative scenario of inflation which can account for a spatially open universe. It is similar to the old inflation in which the bubble nucleation occurs in the sea of the false vacuum, but it differs from the old inflation in that the second slow rollover inflation occurs inside a nucleated bubble. Hence, our observable universe is entirely contained in one nucleated bubble. The significance of the scenario is that apart from a variance caused by model parameters, it gives us a definite prediction on the spectrum of the primordial density perturbations, and hence it is observationally testable. Here we investigate the spectrum of cosmic microwave background anisotropies on large angular scales. We find that the contribution from peculiar modes which never appear in the usual harmonic analysis is significant in the case Ω0 ≲ 0.1.
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UR - http://www.scopus.com/inward/citedby.url?scp=11944270809&partnerID=8YFLogxK
U2 - 10.1086/176588
DO - 10.1086/176588
M3 - Article
AN - SCOPUS:11944270809
VL - 455
SP - 412
EP - 418
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 2
ER -