WFRF:(Gehlot B. K.)
Sökning: WFRF:(Gehlot B. K.) > (2020) > Constraining the in...
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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 04498naa a2200661 4500 | |
| 001 | oai:DiVA.org:su-183595 | |
| 003 | SwePub | |
| 008 | 200722s2020 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1835952 URI |
| 024 | 7 | a https://doi.org/10.1093/mnras/staa4872 DOI |
| 040 | a (SwePub)su | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Ghara, Raghunathu Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),The Open University of Israel, Israel; Technion, Israel4 aut0 (Swepub:su)gragh |
| 245 | 1 0 | a Constraining the intergalactic medium at z approximate to 9.1 using LOFAR Epoch of Reionization observations |
| 264 | c 2020-02-19 | |
| 264 | 1 | b Oxford University Press (OUP),c 2020 |
| 338 | a print2 rdacarrier | |
| 520 | a We derive constraints on the thermal and ionization states of the intergalactic medium (IGM) at redshift approximate to 9.1 using new upper limits on the 21-cm power spectrum measured by the LOFAR radio telescope and a prior on the ionized fraction at that redshift estimated from recent cosmic microwave background (CMB) observations. We have used results from the reionization simulation code GRIZZLY and a Bayesian inference framework to constrain the parameters which describe the physical state of the IGM. We find that, if the gas heating remains negligible, an IGM with ionized fraction greater than or similar to 0.13 and a distribution of the ionized regions with a characteristic size greater than or similar to 8 h(-1) comoving megaparsec (Mpc) and a full width at half-maximum (FWHM) greater than or similar to 16 h(-1) Mpc is ruled out. For an IGM with a uniform spin temperature T-S greater than or similar to 3 K, no constraints on the ionized component can be computed. If the large-scale fluctuations of the signal are driven by spin temperature fluctuations, an IGM with a volume fraction less than or similar to 0.34 of heated regions with a temperature larger than CMB, average gas temperature 7-160 K, and a distribution of the heated regions with characteristic size 3.5-70 h(-1) Mpc and FWHM of less than or similar to 110 h(-1) Mpc is ruled out. These constraints are within the 95 per cent credible intervals. With more stringent future upper limits from LOFAR at multiple redshifts, the constraints will become tighter and will exclude an increasingly large region of the parameter space. | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 653 | a radiative transfer | |
| 653 | a galaxies: formation | |
| 653 | a intergalactic medium | |
| 653 | a cosmology: theory | |
| 653 | a dark ages | |
| 653 | a reionization | |
| 653 | a first stars | |
| 653 | a X-rays: galaxies | |
| 700 | 1 | a Giri, Sambit K.u Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),University of Zurich, Switzerland4 aut0 (Swepub:su)sgiri |
| 700 | 1 | a Mellema, Garreltu Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)gmell |
| 700 | 1 | a Ciardi, B.4 aut |
| 700 | 1 | a Zaroubi, S.4 aut |
| 700 | 1 | a Iliev, I. T.4 aut |
| 700 | 1 | a Koopmans, L. V. E.4 aut |
| 700 | 1 | a Chapman, E.4 aut |
| 700 | 1 | a Gazagnes, S.4 aut |
| 700 | 1 | a Gehlot, B. K.4 aut |
| 700 | 1 | a Ghosh, A.4 aut |
| 700 | 1 | a Jelic, V4 aut |
| 700 | 1 | a Mertens, F. G.4 aut |
| 700 | 1 | a Mondal, R.4 aut |
| 700 | 1 | a Schaye, J.4 aut |
| 700 | 1 | a Silva, M. B.4 aut |
| 700 | 1 | a Asad, K. M. B.4 aut |
| 700 | 1 | a Kooistra, R.4 aut |
| 700 | 1 | a Mevius, M.4 aut |
| 700 | 1 | a Offringa, A. R.4 aut |
| 700 | 1 | a Pandey, V. N.4 aut |
| 700 | 1 | a Yatawatta, S.4 aut |
| 710 | 2 | a Stockholms universitetb Institutionen för astronomi4 org |
| 773 | 0 | t Monthly notices of the Royal Astronomical Societyd : Oxford University Press (OUP)g 493:4, s. 4728-4747q 493:4<4728-4747x 0035-8711x 1365-2966 |
| 856 | 4 | u https://doi.org/10.1093/mnras/staa487y Fulltext |
| 856 | 4 | u https://academic.oup.com/mnras/article-pdf/493/4/4728/33493986/staa487.pdf |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-183595 |
| 856 | 4 8 | u https://doi.org/10.1093/mnras/staa487 |
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