Results 11 to 20 of about 8,595 (212)
The late reionization of filaments [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 16 pages, 9 figures, accepted to ...
Finlator, K. +3 more
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Early Reionization by Miniquasars [PDF]
The Astrophysical Journal, 2004 Motivated by the recent detection by WMAP of a large optical depth to Thomson scattering -- implying a very early reionization epoch -- we assess a scenario where the universe was reionized by `miniquasars' powered by intermediate-mass black holes (IMBHs), the remnants of the first generation of massive stars.
MADAU P. +4 more
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CMB as a Probe of New Physics and Old Times [PDF]
, 2013 Cosmic birefringence (CB)---a rotation of photon-polarization plane in vacuum---is a generic signature of new scalar fields that could provide dark energy. Previously, WMAP observations excluded a uniform CB-rotation angle larger than a degree.
Gluščević, Vera
core +1 more source
Simulating cosmic reionization and the radiation backgrounds from the epoch of reionization [PDF]
AIP Conference Proceedings, 2012 Based on invited review talk by Paul Shapiro at First Stars IV - From Hayashi to the Future, Kyoto, Japan, May 25, 2012; talk slides available at http://tpweb2.phys.konan-u.ac.jp/~FirstStar4/presentation_files/PShapiro ...
Shapiro, Paul R. +12 more
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Quasars as probes of cosmological reionization [PDF]
, 2016 Quasars are the most luminous non-transient sources in the epoch of cosmological reionization (which ended a billion years after the Big Bang, corresponding to a redshift of z ≃ 5), and are powerful probes of the inter-galactic medium at that time.
Mortlock, Daniel, Daniel Mortlock
core +1 more source
PAWS and POCO: NIR Astrophotonic Instruments for Astronomy
Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023 Abstract For near‐infrared ground and space‐based astronomy, compact photonic devices can replace the large bulk optical components in spectrographs, frequency combs, beam combiners, and sky subtraction filters, thus saving cost, reducing volume, weight, and power requirements.
Kalaga Madhav +8 more
wiley +1 more source
Detector system challenges of the wide‐field spectroscopic survey telescope (WST)
Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023 Abstract The wide‐field spectroscopic survey telescope (WST) is proposed to become the next large optical/near infrared facility for the European southern observatory (ESO) once the extremely large telescope (ELT) has become operational. While the latter is optimized for unprecedented sensitivity and adaptive‐optics assisted image quality over a small ...
Roland Bacon +4 more
wiley +1 more source
Cosmological reionization [PDF]
AIP Conference Proceedings, 2001 The universe was reionized by redshift z ~ 6 by a small fraction of the baryons in the universe, which released energy following their condensation out of a cold, dark, and neutral IGM into the earliest galaxies. The theory of this reionization is a critical missing link in the theory of galaxy formation.
openaire +2 more sources
Bridging the Gap between Cosmic Dawn and Reionization Favors Models Dominated by Faint Galaxies
The Astrophysical Journal, 2023 It has been claimed that traditional models struggle to explain the tentative detection of the 21 cm absorption trough centered at z ∼ 17 measured by the EDGES collaboration. On the other hand, it has been shown that the EDGES results are consistent with
Ankita Bera +6 more
doaj +1 more source
Reionization in Technicolor [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 24 pages, 17 figures, accepted to ...
Kristian Finlator +4 more
openaire +3 more sources