Results 91 to 100 of about 1,465,941 (244)

Primordial Magnetic Fields in Light of Dark Ages Global 21-cm Signal

We study the constraints on primordial magnetic fields (PMFs) in light of the global 21-cm signal observed during the dark ages. Primordial magnetic fields can heat the intergalactic medium (IGM) via magnetohydrodynamic effects. We investigate the impact
Natwariya, Pravin Kumar, Nayak, Alekha C., Mohapatra, Vivekanand   +2 more
core   +1 more source

Measuring the intergalactic medium correlation length at 5 < z < 6.1: A fast change at the end of reionization

Astronomy & Astrophysics
Context. The Lyman-α forest of high-redshift quasars is a powerful probe of the late stages of the epoch of reionization (EoR), in particular thanks to the presence of Gunn-Peterson troughs.
Spina Benedetta, Bosman Sarah E. I., Maity Barun, Davies Frederick B.   +3 more
doaj   +1 more source

Shedding light on the Sudanese Dark Ages: Geophysical research at Old Dongola, a city-state of the Funj period (16th-19th centuries). [PDF]

Archaeol Prospect, 2022
Obłuski A, Herbich T, Ryndziewicz R.
europepmc   +1 more source

Evolution‐guided yeast complementation reveals functional differences in human PSPH variants

FEBS Open Bio, EarlyView.
Ancient genomes can help guide which human genetic variants are tested experimentally. This study applies that idea to PSPH, a gene involved in serine biosynthesis, and uses high‐throughput yeast complementation to compare variant function. The findings reveal measurable differences among selected alleles and illustrate the value of evolution‐guided ...
Mauricio Campa‐Álvarez, Diana Ascencio, Miguel Vallebueno‐Estrada, Eduardo González‐Orozco, Christian Eduardo Martínez‐Guerrero, Rafael Montiel, Alexander DeLuna   +6 more
wiley   +1 more source

Establishing a relationship between the cosmological 21 cm power spectrum and interferometric closure phases

Astronomy & Astrophysics
Context. Measurements of the cosmic 21 cm background need to achieve a high dynamic range to isolate it from bright foreground emissions. Instrumental calibration inaccuracies can compromise the spectral fidelity of the smooth foreground continuum ...
Keller P. M., Nikolic B., Thyagarajan N.
doaj   +1 more source

Transformative science from the lunar farside: observations of the dark ages and exoplanetary systems at low radio frequencies. [PDF]

Philos Trans A Math Phys Eng Sci, 2021
Burns JO.
europepmc   +1 more source

Avidin is evolutionarily conserved in fish but dispensable for development and resistance against Streptococcus agalactiae in zebrafish

FEBS Open Bio, EarlyView.
The presence of biotin‐binding avidin proteins in fish and their biological significance are poorly characterized. We cataloged fish avidins and demonstrate that they are widely present and evolutionarily conserved. We created avd knockout zebrafish and show that zebavidin is dispensable for development and that resistance of avd knockout embryos in ...
Anni K. Saralahti, Markus J. T. Ojanen, Mataleena Parikka, Otto Kauko, Mika Rämet, Vesa P. Hytönen   +5 more
wiley   +1 more source

Fundamental Cosmology in the Dark Ages with 21-cm Line Fluctuations [PDF]

, 2019
We describe how 21-cm measurements of the "Dark Ages," between cosmological recombination and the formation of the first luminous sources, can enable new tests of cosmology.
Ma, Yin-Zhe, Chen, Xuelei, Hazelton, Bryna, Visbal, Eli, Chiang, Hsin, Masui, Kiyoshi, Mesinger, Andrew, Jacobs, Daniel, Pober, Jonathan, Bowman, Judd D., Davies, Frederick, Lidz, Adam, Trac, Hy, DeBoer, David, Fialkov, Anastasia, Kohn, Saul, Doré, Olivier, Breysse, Patrick, Koopmans, Leon, Bromm, Volker, Dillon, Joshua, Parsons, Aaron, Thyagarajan, Nithyanandan, Sievers, Jonathan, Saliwanchik, Benjamin, Ali-Haimoud, Yacine, Bull, Philip, Munoz, Julian, Dvorkin, Cora, Mirocha, Jordan, Carilli, Chris L., Beardsley, Adam, La Plante, Paul, Switzer, Eric, Becker, George, Mao, Yi, Murray, Steven, Alvarez, Marcelo, Chang, Tzu-Ching, Furlanetto, Steven, Karkare, Kirit, Liu, Adrian, Aguirre, James, Kovetz, Ely, Burns, Jack, Cohn, Joanne, Zaldarriaga, Matias   +46 more
core   +4 more sources

Constraining reionization morphology and source properties with 21 cm galaxy cross-correlation surveys

Astronomy & Astrophysics
Cross-correlations between 21 cm observations and galaxy surveys provide a powerful probe of reionization by providing robustness against foreground contamination while linking ionization morphology to galaxies. We quantified the constraining power of 21
Pietschke Yannic, Hutter Anne, Heneka Caroline   +2 more
doaj   +1 more source

Peering into the dark (ages) with low-frequency space interferometers: Using the 21-cm signal of neutral hydrogen from the infant universe to probe fundamental (Astro)physics. [PDF]

Exp Astron (Dordr), 2021
Koopmans LVE, Barkana R, Bentum M, Bernardi G, Boonstra AJ, Bowman J, Burns J, Chen X, Datta A, Falcke H, Fialkov A, Gehlot B, Gurvits L, Jelić V, Klein-Wolt M, Lazio J, Meerburg D, Mellema G, Mertens F, Mesinger A, Offringa A, Pritchard J, Semelin B, Subrahmanyan R, Silk J, Trott C, Vedantham H, Verde L, Zaroubi S, Zarka P.   +29 more
europepmc   +1 more source