Detecting ionized bubbles in redshifted 21-cm maps
نویسندگان
چکیده
منابع مشابه
Detecting ionized bubbles in redshifted 21 cm maps
The reionization of the Universe, it is believed, occurred by the growth of ionized regions (bubbles) in the neutral intergalactic medium (IGM). We study the possibility of detecting these bubbles in radio-interferometric observations of redshifted neutral hydrogen (HI) 21 cm radiation. The signal (< 1 mJy) will be buried in noise and foregrounds, the latter being at least a few orders of magni...
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The detection of individual ionized bubbles in HI 21-cm maps is one of the most promising, direct probes of the epoch of reionization (EoR). Atleast 1000 hrs of observation would be required for such a detection with either the currently functioning GMRT or the upcoming MWA. Considering the large investment of telescope time it is essential to identify the“optimal redshift” where the prospects ...
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Extending the formalism of Datta, Bharadwaj & Choudhury (2007) for detecting ionized bubbles in redshifted 21 cm maps using a matched-filtering technique, we use different simulations to analyze the impact of HI fluctuations outside the bubble on the detectability of the bubble. In the first three kinds of simulations there is a spherical bubble of comoving radius Rb, the one that we are trying...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2007
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2007.12421.x