Carbonaceous dust grains seen in the first billion years of cosmic time

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Joris Witstok, Irene Shivaei, Renske Smit, Roberto Maiolino, Stefano Carniani | Summary: Large dust reservoirs (up to $sim 10^8 , mathrm{M_odot}$) have been detected in galaxies out to redshift $z sim 8$, when the age of the universe was only about 600 Myr. Generating significant amounts of […]


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Stochastic gravitational wave background from supernovae in massive scalar-tensor gravity

Kavli Affiliate: Ulrich Sperhake | First 5 Authors: Roxana Rosca-Mead, Michalis Agathos, Christopher J. Moore, Ulrich Sperhake, | Summary: In massive scalar-tensor gravity, core-collapse supernovae are strong sources of scalar-polarized gravitational waves. These can be detectable out to large distance. The dispersive nature of the propagation of waves in the massive scalar field mean the […]


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GA-NIFS: Black hole and host galaxy properties of two z$simeq$6.8 quasars from the NIRSpec IFU

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Madeline A. Marshall, Michele Perna, Chris J. Willott, Roberto Maiolino, Jan Scholtz | Summary: Integral Field Spectroscopy (IFS) with JWST NIRSpec will significantly improve our understanding of the first quasars, by providing spatially resolved, infrared spectroscopic capabilities which cover key rest-frame optical emission lines that have been […]


Continue.. GA-NIFS: Black hole and host galaxy properties of two z$simeq$6.8 quasars from the NIRSpec IFU

JADES: Probing interstellar medium conditions at $zsim5.5-9.5$ with ultra-deep JWST/NIRSpec spectroscopy

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Alex J. Cameron, Aayush Saxena, Andrew J. Bunker, Francesco D’Eugenio, Stefano Carniani | Summary: We present emission line ratios from a sample of 26 Lyman break galaxies from $zsim5.5-9.5$ with $-17.0<M_{1500}<-20.4$, measured from ultra-deep JWST/NIRSpec MSA spectroscopy from JADES. We use 28 hour deep PRISM/CLEAR and 7 […]


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Cosmic Web Dissection in Fuzzy Dark Matter Cosmologies

Kavli Affiliate: George Efstathiou | First 5 Authors: Tibor Dome, Anastasia Fialkov, Nina Sartorio, Philip Mocz, | Summary: On large cosmological scales, anisotropic gravitational collapse is manifest in the dark cosmic web. Its statistical properties are little known for alternative dark matter models such as fuzzy dark matter (FDM). In this work, we assess for […]


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Joint analysis constraints on the physics of the first galaxies with low frequency radio astronomy data

Kavli Affiliate: George Efstathiou | First 5 Authors: Harry T. J. Bevins, Stefan Heimersheim, Irene Abril-Cabezas, Anastasia Fialkov, Eloy de Lera Acedo | Summary: Observations of the first billion years of cosmic history are currently limited. We demonstrate, using a novel machine learning technique, the synergy between observations of the sky-averaged 21-cm signal from neutral […]


Continue.. Joint analysis constraints on the physics of the first galaxies with low frequency radio astronomy data

Joint analysis constraints on the physics of the first galaxies with low frequency radio astronomy data

Kavli Affiliate: George Efstathiou | First 5 Authors: Harry T. J. Bevins, Stefan Heimersheim, Irene Abril-Cabezas, Anastasia Fialkov, Eloy de Lera Acedo | Summary: The first billion years of cosmic history remains largely unobserved. We demonstrate, using a novel machine learning technique, how combining upper limits on the spatial fluctuations in the 21-cm signal with […]


Continue.. Joint analysis constraints on the physics of the first galaxies with low frequency radio astronomy data

Unequal-mass boson-star binaries: Initial data and merger dynamics

Kavli Affiliate: Ulrich Sperhake | First 5 Authors: Tamara Evstafyeva, Ulrich Sperhake, Thomas Helfer, Robin Croft, Miren Radia | Summary: We present a generalization of the curative initial data construction derived for equal-mass compact binaries in Helfer {it et al} (2019 Phys. Rev. D 99 044046; 2022 Class. Quantum Grav. 39 074001) to arbitrary mass […]


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Radiation from Global Topological Strings using Adaptive Mesh Refinement: Massive Modes

Kavli Affiliate: E. P. S. Shellard | First 5 Authors: Amelia Drew, E. P. S. Shellard, , , | Summary: We implement adaptive mesh refinement (AMR) simulations of global topological strings using the public code, GRChombo. We perform a quantitative investigation of massive radiation from single sinusoidally displaced string configurations, studying a range of string […]


Continue.. Radiation from Global Topological Strings using Adaptive Mesh Refinement: Massive Modes