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Epoch of Reionization/Cosmic Dawn Science With

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V>ÃÌÃÊÊi>ÀÌ Ê >ÛiÊÌÊLiÊwÌiÀi`ÊÕÌ°Ê ÛiÊÀiÊ`vwVÕÌÊÜÊ LiÊ`i>}ÊÜÌ ÊvÀi}ÀÕ`ÊÀ>`ÊiÃÃÊvÀÊÕÀÊ}>>ÝÞ]Ê ÀiÃEpochiÌ>ÌÛiÊÃÌ>Ì ÃofÌV> ÊReionizationÃ>«iÊvÊÕÀÊÕÛiÀÃiÊ >Science`ÊÜÌ Ê } Ê Working Group}ÀÜÌ Êë Õ ÀÌÃ]ÊÌ iÊ>VVÀiÌ}Ê}>ÃÊà iÃÊÕV ÊÀiÊLÀ} ÌÞÊ Anna " , ÊBonaldi/ " Ê 8 * " , (Manchester)! Ü V ÊÃÊ£ä]äääÊÌiÃÊÀiÊÌiÃiÊÌ >ÊÌ iÊÃ}>ÊvÀÊÌ iÊ iÕ} ÊÀiÃÕÌÊÌÊV>«ÌÕÀiÊ`Ü>ÀvÊ}>>ÝiðÊ/ iÊÃÕ>ÌÊ ® Ì >ÊÌ iÊiÌÀiÊÀiÃÌÊvÊÌ iÊ}>>ÝÞ]Ê«À`ÕV}Ê>ʵÕ>Ã>À°Ê/ iÊ i>ÃÕÀ}ÊÌ iÊ->-V>iÊ*ÜiÀÊ-«iVÌÀÕÊvÊ ÃVÊ iÃÌÞÊ Ã Chair: Leon Koopmans (Groningen) ! Emma Chapman (UCL)! ÕVÌÕ>ÌÃÊÌ ÀÕ} ÊÓ£ÊVÊ/}À>« ÞÊ*ÀÀÊÌÊÌ iÊ «V ÊÊ i«V ÊvÊÀiâ>Ì°ÊÀÌÕ>ÌiÞ]ÊÌ iÊ}>>VÌVÊÃiÊÃÊÀÕ} >ÃÊii`ÃÊÌÊÌÀ>ViÊÌ iÊ«À«>}>ÌÊvÊÌ iÊâ}ÊÀ>`>ÌÊ ->Ê }Ì>Ê-ÞÊ-ÕÀÛiÞÊ >ÃÊÀiÛi>i`ÊÌ >ÌʵÕ>Ã>ÀÃÊÜÌ ÊL>VÊ Ì Ê Ê > vÊ-ÌÀÕVÌÕÀiÊÀ>Ì°ÊLÀ> >ÊiLÊ>`Ê>Ì>ÃÊ<>`>ÀÀ>}>ÊÊ ÞÊÌ iÊÃ>iÊ>ÌÊÃ} ÌÞÊ`vviÀiÌÊÜ>Ûii}Ì Ã]ÊÜ iÀi>ÃÊÌ iÊÃ} vÀÊÌ iÊ}>>ÝiÃÊÌ ÀÕ} ÊÌ iÊÃÕÀÀÕ`}Ê}>Ã]Ê>Ê«ÀViÃÃÊ` Õ iÃÊvÊÀiÊÌ >Ê>ÊLÊÃ>ÀÊ>ÃÃiÃÊ>Ài>`ÞÊiÝÃÌi`Ê>ÌÊ>Ê Ê Ê Æ Ê Co-chairs: Garrelt Mellema (Stockholm) ! Ilian* Þà V>IlievÊ,iÛiÜÊ i(Sussex)ÌÌiÀÃ]Ê6°ÊÓ]Ê °ÊÓ£!]Ê*>«iÀÊ °ÊÓ££Îä£ÆÊ>ÞÊÓx]ÊÓää{°Ê ® à >ÊyÕVÌÕ>ÌiÃÊÜÌ ÊÜ>Ûii}Ì ]ÊÀiyiVÌ}ÊÌ iÊë>Ì>ÊÃÌÀÕVÌÕÀiÊ ii`ÊÞÊÛiÀÞÊVÀÕ`iÞÊÃÊv>À°Ê"LÃiÀÛiÀÃÊ>ÞÊÜiÊÃiiÊÀiâ> VÃVÊ>}iÊvÊiÊLÊÞi>ÀðÊÜÊ``ÊÃÕV Ê>ÃÃÛiÊL>VÊ ­ Ê *Ài«ÀÌÊ>Û>>LiÊ>ÌÊ>ÀÝÛ°À}É>LÃÉ>ÃÌÀ« ÉäΣӣÎ{ Þ - Ì Ì vÊÌ iÊâi`ÊLÕLLiðÊ/ ÃÊ`vviÀiViÊ>iÃÊÌÊ«ÃÃLiÊÌÊ ÌÊLivÀiÊÌ iÀÃÌÃÊ>ÀiÊ>LiÊÌÊvÀiV>ÃÌÊÜ >ÌÊÌ iÞÊà Õ`ÊÃii° iÃÊViÊÌÊiÝÃÌÊÃÊi>ÀÞ¶Ê7 ÞÊ``ÊÌ iÞÊÃÌ«Ê}ÀÜ}¶ > à À À !! 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Cosmic Dawn When did the first ! Reionization black holes form? How did reionization Galaxy ! proceed? formation How do galaxies form and evolve? UK-SKA Birmingham 2014 Jonathan Pritchard More needed... Age of Universe= QSO CMB ∫ HUDF redshift= Existing observations leaves much unanswered Possible hints of neutral hydrogen at z~7, e.g. z=7 QSO, LAE/LBG ratio By 2020: possible advances... 1) Planck polarisation could constrain redshift and duration of reionization! 2) HST+JWST will have observed bright end of luminosity function to z~12 (faint end will still be incomplete; connection to ionizing photons may still be unclear)! 3) Little advance in QSO (more at z~7) - wait for Euclid in 2020 to push to z~8! 4) LAE surveys into EoR will be more advanced (HSC) - maybe clustering => patchy reionization? SKA will map out details of reionization and cosmic dawn UK-SKA Birmingham 2014 Jonathan Pritchard More than reionization ! • 21 cm fluctuations contain wealth of information! - Lyman alpha fluctuations => star formation rate and first galaxies! - Temperature fluctuations => X-ray sources and first black holes! - Neutral fraction fluctuations => topology of reionization! - Density fluctuations => cosmology First galaxies Reionization! Reionization! Dark Ages begins ends Brightness [mK] Brightness Heating begins 50 100 150 200 PritchardUK-SKA &Birmingham Loeb 2010 2014 Frequency [MHz] ⌫ = 1420MHzJonathan/(1 Pritchard + z) More than reionization ! • 21 cm fluctuations contain wealth of information! - Lyman alpha fluctuations => star formation rate and first galaxies! - Temperature fluctuations => X-ray sources and first black holes! - Neutral fraction fluctuations => topology of reionization! - Density fluctuations => cosmology Dark! Ages First galaxies Reionization! Reionization! Dark Ages begins ends Brightness [mK] Brightness Heating begins 50 100 150 200 PritchardUK-SKA &Birmingham Loeb 2010 2014 Frequency [MHz] ⌫ = 1420MHzJonathan/(1 Pritchard + z) More than reionization ! • 21 cm fluctuations contain wealth of information! - Lyman alpha fluctuations => star formation rate and first galaxies! - Temperature fluctuations => X-ray sources and first black holes! - Neutral fraction fluctuations => topology of reionization! - Density fluctuations => cosmology Dark! Cosmic! Ages Dawn First galaxies Reionization! Reionization! Dark Ages begins ends Brightness [mK] Brightness Heating begins 50 100 150 200 PritchardUK-SKA &Birmingham Loeb 2010 2014 Frequency [MHz] ⌫ = 1420MHzJonathan/(1 Pritchard + z) More than reionization ! • 21 cm fluctuations contain wealth of information! - Lyman alpha fluctuations => star formation rate and first
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