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dc.creatorFernandez, E. R.en
dc.creatorKomatsu, E.en
dc.date.accessioned2015-04-16T14:48:20Zen
dc.date.available2015-04-16T14:48:20Zen
dc.date.issued2008-03en
dc.identifier.citationElizabeth R. Fernandez and Eiichiro Komatsu. AIP Conference Proceedings 990, 201 (Mar., 2008); doi: 10.1063/1.2905541en
dc.identifier.issn0094-243Xen
dc.identifier.issn978-0-7354-0509-7en
dc.identifier.urihttp://hdl.handle.net/2152/29489en
dc.description.abstractWe present a simple, relatively model-independent method to interpret the galaxy number count data at z > 6. The only free parameter is a mass-to->observed light> ratio, M-h/L-band, where M-h refers to the total mass of the host halo, and L-band refers to the observed luminosity of the source. For narrow-band surveys, L-band is simply related to the intrinsic Ly alpha luminosity with a survival fraction of Ly alpha photons, alpha(esc). The mass-to->bolometric light>, M-h/L-bol, can also be found, once the metallicity and initial mass function of stellar populations are given. We find constraints on the mass-to-light ratio of Ly-alpha emitters from 5.7 < z < 8.8 of (M-h/L-bol) (alpha(esc)epsilon(1)/gamma)(-1) = 21 - 38, 14 - 26, and 9 - 17 for Z = 0, 1150, and 1 2 D, respectively, where E is the duty cycle and 7 - 2 is the local shape of the cumulative luminosity function. Therefore, Lya emitters are consistent with either starburst galaxies (M-h/L-bol similar to 0.1 - 1) for reasonable values of the Lya survival fraction, alpha(esc)epsilon(1)/gamma similar to 0.01 -0.05, or normal populations (M-h/L-bol similar to 10) if a good fraction of Ly alpha photons survived. We find no evidence for the end of reionization from current survey observations. The data are consistent with no evolution of intrinsic properties of Lya emitters or neutral fraction in the intergalactic medium. We also show that the lack of detections at z = 8.8 does not rule out the high-z galaxies being the origin of the excess near infrared background.en
dc.language.isoEnglishen
dc.rightsAdministrative deposit of works to UT Digital Repository: 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
dc.subjectcosmology : theoryen
dc.subjectdiffuse radiationen
dc.subjectinfrared : galaxiesen
dc.subjectsubaru deep fielden
dc.subjectband searchen
dc.subjectgalaxiesen
dc.subjectstarsen
dc.subjectastronomy & astrophysicsen
dc.titleMass-To-Light Ratio Of Ly Alpha Emitters: Implications Of Ly Alpha Surveys At Redshifts Z = 5.7, 6.5, 7, And 8.8en
dc.typeArticleen
dc.description.departmentAstronomyen
dc.identifier.doi10.1063/1.2905541en
dc.contributor.utaustinauthorFernandez, Elizabeth R.en
dc.contributor.utaustinauthorKomatsu, Eiichiroen
dc.relation.ispartofserialFirst Stars IIIen_US


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