Abstract
Observations of the 21-centimetre line of atomic hydrogen in the early Universe directly probe the history of the reionization of the gas between galaxies. The observations are challenging, though, because of the low expected signal strength (∼10 mK), and contamination by strong (>100K) foreground synchrotron emission in the Milky Way and extragalactic continuum sources. If reionization happened rapidly, there should be a characteristic signature visible against the smooth foreground in an all-sky spectrum. Here we report an all-sky spectrum between 100 and 200MHz, corresponding to the redshift range 6-<z<13 for the 21-centimetre line. The data exclude a rapid reionization timescale of δz<0.06 at the 95% confidence level.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 796-798 |
| Number of pages | 3 |
| Journal | Nature |
| Volume | 468 |
| Issue number | 7325 |
| DOIs | |
| State | Published - Dec 9 2010 |
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Cite this
A lower limit of δz>0.06 for the duration of the reionization epoch. / Bowman, Judd; Rogers, Alan E E.
In: Nature, Vol. 468, No. 7325, 09.12.2010, p. 796-798.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A lower limit of δz>0.06 for the duration of the reionization epoch
AU - Bowman, Judd
AU - Rogers, Alan E E
PY - 2010/12/9
Y1 - 2010/12/9
N2 - Observations of the 21-centimetre line of atomic hydrogen in the early Universe directly probe the history of the reionization of the gas between galaxies. The observations are challenging, though, because of the low expected signal strength (∼10 mK), and contamination by strong (>100K) foreground synchrotron emission in the Milky Way and extragalactic continuum sources. If reionization happened rapidly, there should be a characteristic signature visible against the smooth foreground in an all-sky spectrum. Here we report an all-sky spectrum between 100 and 200MHz, corresponding to the redshift range 6-
AB - Observations of the 21-centimetre line of atomic hydrogen in the early Universe directly probe the history of the reionization of the gas between galaxies. The observations are challenging, though, because of the low expected signal strength (∼10 mK), and contamination by strong (>100K) foreground synchrotron emission in the Milky Way and extragalactic continuum sources. If reionization happened rapidly, there should be a characteristic signature visible against the smooth foreground in an all-sky spectrum. Here we report an all-sky spectrum between 100 and 200MHz, corresponding to the redshift range 6-
UR - http://www.scopus.com/inward/record.url?scp=78650126832&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78650126832&partnerID=8YFLogxK
U2 - 10.1038/nature09601
DO - 10.1038/nature09601
M3 - Article
C2 - 21150993
AN - SCOPUS:78650126832
VL - 468
SP - 796
EP - 798
JO - Nature
JF - Nature
SN - 0028-0836
IS - 7325
ER -