Detecting the Rise and Fall of the First Stars by Their Impact on Cosmic Reionization

dc.contributor.utaustinauthorShapiro, Paul R.en_US
dc.contributor.utaustinauthorMao, Yien_US
dc.creatorAhn, Kyungjinen_US
dc.creatorIliev, Ilian T.en_US
dc.creatorShapiro, Paul R.en_US
dc.creatorMellema, Garrelten_US
dc.creatorKoda, Junen_US
dc.creatorMao, Yien_US
dc.date.accessioned2016-10-28T19:37:31Z
dc.date.available2016-10-28T19:37:31Z
dc.date.issued2012-09en_US
dc.description.abstractThe intergalactic medium was reionized before redshift z similar to 6, most likely by starlight which escaped from early galaxies. The very first stars formed when hydrogen molecules (H-2) cooled gas inside the smallest galaxies, minihalos (MHs) of mass between 10(5) and 10(8) M-circle dot. Although the very first stars began forming inside these MHs before redshift z similar to 40, their contribution has, to date, been ignored in large-scale simulations of this cosmic reionization. Here we report results from the first reionization simulations to include these first stars and the radiative feedback that limited their Formation, in a volume large enough to follow the crucial spatial variations that influenced the process and its observability. We show that, while MH stars stopped far short of fully ionizing the universe, reionization began much earlier with MH sources than without, and was greatly extended, which boosts the intergalactic electron-scattering optical depth and the large-angle polarization fluctuations of the cosmic microwave background significantly. This boost should be readily detectable by Planck, although within current Wilkinson Microwave Anisotropy Probe uncertainties. If reionization ended as late as z(ov) less than or similar to 7, as suggested by other observations, Planck will thereby see the signature of the first stars at high redshift, currently undetectable by other probes.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipNRFen_US
dc.description.sponsorshipKorean government MEST 2009-0068141, 2009-0076868, 2012R1A1A1014646, 2012M4A2026720en_US
dc.description.sponsorshipSoutheast Physics Network (SEPNet)en_US
dc.description.sponsorshipScience and Technology Facilities Council ST/F002858/1, ST/I000976/1en_US
dc.description.sponsorshipSwedish Research Council 2009-4088en_US
dc.description.sponsorshipU.S. NSF AST-0708176, AST-1009799en_US
dc.description.sponsorshipNASA NNX07AH09G, NNG04G177G, NNX11AE09Gen_US
dc.description.sponsorshipChandra grant SAO TM8-9009Xen_US
dc.identifierdoi:10.15781/T2V40K23K
dc.identifier.citationAhn, Kyungjin, Ilian T. Iliev, Paul R. Shapiro, Garrelt Mellema, Jun Koda, and Yi Mao. "Detecting the rise and fall of the first stars by their impact on cosmic reionization." The Astrophysical Journal Letters, Vol. 756, No. 1 (Sep., 2012): L16. Harvarden_US
dc.identifier.doi10.1088/2041-8205/756/1/l16en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/2152/43069
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journal Lettersen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjectcosmology: theoryen_US
dc.subjectgalaxies: high-redshiften_US
dc.subjectradiative transferen_US
dc.subjectradiative-transferen_US
dc.subjectintergalactic mediumen_US
dc.subjectsimulationsen_US
dc.subjectfeedbacken_US
dc.subjectgalaxiesen_US
dc.subjectuniverseen_US
dc.subjectparametersen_US
dc.subjectbinariesen_US
dc.subjectredshiften_US
dc.subjectepochen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleDetecting the Rise and Fall of the First Stars by Their Impact on Cosmic Reionizationen_US
dc.typeArticleen_US

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