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The Spectral Evolut...
The Spectral Evolution of the First Galaxies. III. Simulated James Webb Space Telescope Spectra of Reionization-epoch Galaxies with Lyman-continuum Leakage
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- Zackrisson, Erik (author)
- Uppsala universitet,Observationell astrofysik
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- Binggeli, Christian (author)
- Uppsala universitet,Observationell astrofysik
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- Finlator, Kristian (author)
- New Mexico State Univ, MSC 4500, Las Cruces, NM 88003 USA.
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- Gnedin, Nickolay Y. (author)
- Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA.;Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.;Univ Chicago, Kavli Inst Cosmol Phys & Enrico Fermi Inst, Chicago, IL 60637 USA.
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- Paardekooper, Jan-Pieter (author)
- Heidelberg Univ, Zentrum Astronomie, Inst Theoret Astrophys, Albert Ueberle Str 2, D-69120 Heidelberg, Germany.
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- Shimizu, Ikkoh (author)
- Osaka Univ, Dept Earth & Space Sci, 1-1 Machikaneyama, Toyonaka, Osaka 565, Japan.
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- Inoue, Akio K. (author)
- Osaka Sangyo Univ, Coll Gen Educ, 3-1-1,Nakagaito, Daito 5748530, Japan.
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- Jensen, Hannes (author)
- Uppsala universitet,Observationell astrofysik
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- Micheva, Genoveva (author)
- Univ Michigan, Dept Astron, 311 West Hall,1085 S. Univ Ave, Ann Arbor, MI 48109 USA.
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- Khochfar, Sadegh (author)
- Univ Edinburgh, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland.
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- Dalla Vecchia, Claudio (author)
- Inst Astrofis Canarias, C Via Lactea S-N, E-38205 Tenerife, Spain.;Univ La Laguna, Dept Astrofis, Av Astrofis Francisco Sanchez S-N, E-38206 San Cristobal la Laguna, Spain.
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(creator_code:org_t)
- 2017-02-09
- 2017
- English.
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In: Astrophysical Journal. - : Institute of Physics Publishing (IOPP). - 0004-637X .- 1538-4357. ; 836:1
- Related links:
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http://arxiv.org/pdf...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
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- Using four different suites of cosmological simulations, we generate synthetic spectra for galaxies with different Lyman-continuum escape fractions (f(esc)) at redshifts z approximate to 7-9, in the rest-frame wavelength range relevant for the James Webb Space Telescope (JWST) NIRSpec instrument. By investigating the effects of realistic star formation histories and metallicity distributions on the EW(H beta)-beta diagram (previously proposed as a tool for identifying galaxies with very high f(esc)), we find that neither of these effects are likely to jeopardize the identification of galaxies with extreme Lyman-continuum leakage. Based on our models, we expect that essentially all z approximate to 7-9 galaxies that exhibit rest-frame EW(Hb). 30 angstrom to have f(esc) > 0.5. Incorrect assumptions concerning the ionizing fluxes of stellar populations or the dust properties of z > 6 galaxies can in principle bias the selection, but substantial model deficiencies of this type should at the same time be evident from offsets in the observed distribution of z > 6 galaxies in the EW(H beta)-beta diagram compared to the simulated distribution. Such offsets would thereby allow JWST/NIRSpec measurements of these observables to serve as input for further model refinement.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- dark ages
- reionization
- first stars
- galaxies: high-redshift
- techniques: spectroscopic
Publication and Content Type
- ref (subject category)
- art (subject category)
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Zackrisson, Erik
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Binggeli, Christ ...
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Finlator, Kristi ...
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Gnedin, Nickolay ...
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Paardekooper, Ja ...
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Shimizu, Ikkoh
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Inoue, Akio K.
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Jensen, Hannes
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Micheva, Genovev ...
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Khochfar, Sadegh
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Dalla Vecchia, C ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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Uppsala University