Results 21 to 30 of about 27,730 (253)
CEMPlifying reionization [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 The massive stars that ionised the Universe have short lifetimes and can only be studied near the time of formation, but any low mass stars that formed contemporaneously might be observable in the local Universe today. We study the abundance pattern and spatial distribution of these `siblings of reionizers' (SoRs) in the EAGLE cosmological ...
Mahavir Sharma, Tom Theuns, Carlos Frenk
openaire +3 more sources
The Epoch of Reionization in Warm Dark Matter Scenarios
Universe, 2021 In this paper we investigate how the Reionization process is affected by early galaxy formation in different cosmological scenarios. We use a semi-analytic model with suppressed initial power spectra to obtain the UV Luminosity Function in thermal Warm ...
Massimiliano Romanello +2 more
doaj +1 more source
The reionization of carbon [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 Observations suggest that CII was more abundant than CIV in the intergalactic medium towards the end of the hydrogen reionization epoch. This transition provides a unique opportunity to study the enrichment history of intergalactic gas and the growth of the ionizing background (UVB) at early times.
Robert Thompson +6 more
openaire +4 more sources
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
The galaxies that reionized the Universe [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 14 pages, 13 figures, paper accepted for publication in ...
Milan Raičević +4 more
openaire +6 more sources
The Astrophysical Journal, 2023 We use large simulations of Ly α emitters with different fractions of ionized intergalactic medium to quantify the clustering of Ly α emitters as measured by the void probability function (VPF), and how it evolves under different ionization scenarios. We
Lucia A. Perez +3 more
doaj +1 more source
Journal of Geophysical Research: Space Physics, Volume 128, Issue 10, October 2023., 2023 Abstract We analyze the emission of energetic neutral atom (ENA) flux from charge exchange between Jovian magnetospheric ions and the atmospheres of Callisto and Europa. For this purpose, we combine the draped electromagnetic fields from a hybrid plasma model with a particle tracing tool for the energetic ions.
C. Michael Haynes +5 more
wiley +1 more source
Reionization in Technicolor [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 We present the Technicolor Dawn simulations, a suite of cosmological radiation-hydrodynamic simulations of the first 1.2 billion years. By modeling a spatially-inhomogeneous UVB on-the-fly with 24 frequencies and resolving dark matter halos down to $10^8 M_\odot$ within 12 $h^{-1}$ Mpc volumes, our simulations unify observations of the intergalactic ...
Laura C. Keating +5 more
openaire +4 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