---
res:
  bibo_abstract:
  - Constraining the properties of Population III (Pop III) stars will be very challenging
    because they reside in small galaxies at high redshift which will be difficult
    to directly detect. In this paper, we suggest that intensity mapping may be a
    promising method to study Pop III stars. Intensity mapping is a technique proposed
    to measure large-scale fluctuations of galaxy line emission in three dimensions
    without resolving individual sources. This technique is well suited for observing
    many faint galaxies because it can measure their cumulative emission even if they
    cannot be directly detected. We focus on intensity mapping of He ii recombination
    lines. These lines are much stronger in Pop III stars than Pop II stars because
    the harder spectra of Pop III stars are expected to produce many He ii ionizing
    photons. Measuring the He ii 1640 Å intensity mapping signal, along with the signals
    from other lines such as Lyα, Hα, and metal lines, could give constraints on the
    initial mass function (IMF) and star formation rate density of Pop III stars as
    a function of redshift. To demonstrate the feasibility of these observations,
    we estimate the strength of the Pop III He ii 1640 Å intensity mapping signal
    from z = 10–20. We show that at z ≈ 10, the signal could be measured accurately
    by two different hypothetical future instruments, one which cross-correlates He
    ii 1640 Å with CO(1–0) line emission from galaxies and the other with 21 cm emission
    from the intergalactic medium.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: Eli
      foaf_name: Visbal, Eli
      foaf_surname: Visbal
  - foaf_Person:
      foaf_givenName: Zoltán
      foaf_name: Haiman, Zoltán
      foaf_surname: Haiman
      foaf_workInfoHomepage: http://www.librecat.org/personId=7c006e8c-cc0d-11ee-8322-cb904ef76f36
  - foaf_Person:
      foaf_givenName: Greg L.
      foaf_name: Bryan, Greg L.
      foaf_surname: Bryan
  bibo_doi: 10.1093/mnras/stv785
  bibo_issue: '3'
  bibo_volume: 450
  dct_date: 2015^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/0035-8711
  - http://id.crossref.org/issn/1365-2966
  dct_language: eng
  dct_publisher: Oxford University Press@
  dct_title: Looking for Population III stars with He ii line intensity mapping@
...