Astrophysics – Page 509 – Kavli Institute Pre-Print Publications

Interstellar and Circumgalactic Properties of an Unseen $z=6.84$ Galaxy: Abundances, Ionization, and Heating in the Earliest Known Quasar Absorber

Posted by klaurent November 20, 2020MIT

Kavli Affiliate: Gabor Furesz | First 5 Authors: Robert A. Simcoe, Masafusa Onoue, Anna-Christina Eilers, Eduardo Banados, Thomas J. Cooper | Summary: We analyze relative abundances and ionization conditions in a strong absorption system at z=6.84, seen in the spectrum of the z=7.54 background quasar ULAS J134208.10+092838.61. Singly ionized C, Si, Fe, Mg, and Al […]

Continue..

Blandford-Znajek jets in galaxy formation simulations: method and implementation

Posted by klaurent November 20, 2020Cambridge

Kavli Affiliate: Debora Sijacki | First 5 Authors: Rosie Y. Talbot, Martin A. Bourne, Debora Sijacki, , | Summary: Jets launched by active galactic nuclei (AGN) are believed to play a significant role in shaping the properties of galaxies and provide an energetically viable mechanism through which galaxies can become quenched. Here we present a […]

Continue..

Deep learning insights into cosmological structure formation

Posted by klaurent November 20, 2020Chicago

Kavli Affiliate: Brian Nord | First 5 Authors: Luisa Lucie-Smith, Hiranya V. Peiris, Andrew Pontzen, Brian Nord, Jeyan Thiyagalingam | Summary: While the evolution of linear initial conditions present in the early universe into extended halos of dark matter at late times can be computed using cosmological simulations, a theoretical understanding of this complex process […]

Continue..

Deep learning insights into cosmological structure formation

Posted by November 20, 2020Chicago

Kavli Affiliate: Brian Nord | First 5 Authors: Luisa Lucie-Smith, Hiranya V. Peiris, Andrew Pontzen, Brian Nord, Jeyan Thiyagalingam | Summary: The evolution of linear initial conditions present in the early universe into extended halos of dark matter at late times can be computed using cosmological simulations. However, a theoretical understanding of this complex process […]

Continue..

Quantifying Ionospheric Effects on Global 21-cm Observations

Posted by klaurent November 20, 2020Cambridge

Kavli Affiliate: George Efstathiou | First 5 Authors: Emma Shen, Dominic Anstey, Eloy de Lera Acedo, Anastasia Fialkov, Will Handley | Summary: We modelled the two major layer of Earth’s ionosphere, the F-layer and the D-layer, by a simplified spatial model with temporal variance to study the chromatic ionospheric effects on global 21-cm observations. From […]

Continue..

Affleck-Dine inflation in supergravity

Posted by klaurent November 20, 2020Tokyo

Kavli Affiliate: Masahiro Kawasaki | First 5 Authors: Masahiro Kawasaki, Shusuke Ueda, , , | Summary: Affleck-Dine inflation is a recently proposed model in which a single complex scalar field, nonminimally coupled to gravity, drives inflation and simultaneously generates the baryon asymmetry of universe via Affleck-Dine mechanism. In this paper we investigate the supersymmetric implementation […]

Continue..

Origin of the in-orbit instrumental background of the Hard X-ray Imager onboard Hitomi

Posted by dbos November 20, 2020Tokyo

Kavli Affiliate: Shinichiro Takeda | First 5 Authors: Kouichi Hagino, Hirokazu Odaka, Goro Sato, Tamotsu Sato, Hiromasa Suzuki | Summary: Understanding and reducing the in-orbit instrumental backgrounds are essential to achieving high sensitivity in hard X-ray astronomical observations. The observational data of the Hard X-ray Imager (HXI) on board the Hitomi satellite provides useful information […]

Continue..

Origin of the in-orbit instrumental background of the Hard X-ray Imager onboard Hitomi

Posted by klaurent November 20, 2020Tokyo

Continue..

Generalised velocity-dependent one-scale model for current-carrying strings

Posted by klaurent November 19, 2020Cambridge

Kavli Affiliate: E. P. S. Shellard | First 5 Authors: C. J. A. P. Martins, Patrick Peter, I. Yu. Rybak, E. P. S. Shellard, | Summary: We develop an analytic model to quantitatively describe the evolution of superconducting cosmic string networks. Specifically, we extend the velocity-dependent one-scale (VOS) model to incorporate arbitrary currents and charges […]

Continue..

Three-flavor collective neutrino conversions with multi-azimuthal-angle instability in an electron-capture supernova model

Posted by klaurent November 19, 2020Tokyo

Kavli Affiliate: Shunsaku Horiuchi | First 5 Authors: Masamichi Zaizen, Shunsaku Horiuchi, Tomoya Takiwaki, Kei Kotake, Takashi Yoshida | Summary: We investigate the multi-azimuthal angle (MAA) effect on collective neutrino oscillation by considering the three-dimensional neutrino momentum distribution in a realistic electron-capture supernova model with an $8.8 M_{odot}$ progenitor. We find that the MAA effect […]

Continue..