Progress in Direct Measurements of the Hubble Constant

Kavli Affiliate: Wendy L. Freedman | First 5 Authors: Wendy L. Freedman, Barry F. Madore, , , | Summary: One of the most exciting and pressing issues in cosmology today is the discrepancy between some measurements of the local Hubble constant and other values of the expansion rate inferred from the cosmic microwave background (CMB) […]


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On the Comparison of AGN with GRMHD Simulations: II. M87

Kavli Affiliate: Roger Blandford | First 5 Authors: Richard Anantua, Angelo Ricarte, George Wong, Razieh Emami, Roger Blandford | Summary: Horizon-scale observations of the jetted active galactic nucleus M87 are compared with simulations spanning a broad range of dissipation mechanisms and plasma content in three-dimensional general relativistic flows around spinning black holes. Observations of synchrotron […]


Continue.. On the Comparison of AGN with GRMHD Simulations: II. M87

On the Comparison of AGN with GRMHD Simulations: II. M87

Kavli Affiliate: Roger Blandford | First 5 Authors: Richard Anantua, Angelo Ricarte, George Wong, Razieh Emami, Roger Blandford | Summary: Horizon-scale observations of the jetted active galactic nucleus M87 are compared with simulations spanning a broad range of dissipation mechanisms and plasma content in three-dimensional general relativistic flows around spinning black holes. Observations of synchrotron […]


Continue.. On the Comparison of AGN with GRMHD Simulations: II. M87

Line profile of nuclear de-excitation gamma-ray emission from very hot plasma

Kavli Affiliate: Tadayuki Takahashi | First 5 Authors: Hiroki Yoneda, Felix Aharonian, Paolo Coppi, Thomas Siegert, Tadayuki Takahashi | Summary: De-excitation gamma-ray lines, produced by nuclei colliding with protons, provide information about astrophysical environments where particles have kinetic energies of $10-100$ MeV per nucleon. In general, such environments can be categorized into two types: the […]


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Ambiguity, Invisibility, and Negativity

Kavli Affiliate: Frank Wilczek | First 5 Authors: Frank Wilczek, , , , | Summary: Many widely different problems have a common mathematical structure wherein limited knowledge lead to ambiguity that can be captured conveniently using a concept of invisibility that requires the introduction of negative values for quantities that are inherently positive. Here I […]


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EIGER V. Characterizing the Host Galaxies of Luminous Quasars at $zgtrsim6$

Kavli Affiliate: Robert A. Simcoe | First 5 Authors: Minghao Yue, Anna-Christina Eilers, Robert A. Simcoe, Ruari Mackenzie, Jorryt Matthee | Summary: We report {em JWST}/NIRCam measurements of quasar host galaxy emissions and supermassive black hole (SMBH) masses for six quasars at $5.9<z<7.1$ in the textit{Emission-line galaxies and Intergalactic Gas in the Epoch of Reionization} […]


Continue.. EIGER V. Characterizing the Host Galaxies of Luminous Quasars at $zgtrsim6$

EIGER V. Characterizing the Host Galaxies of Luminous Quasars at $zgtrsim6$

Kavli Affiliate: Robert A. Simcoe | First 5 Authors: Minghao Yue, Anna-Christina Eilers, Robert A. Simcoe, Ruari Mackenzie, Jorryt Matthee | Summary: We report {em JWST}/NIRCam measurements of quasar host galaxy emissions and supermassive black hole (SMBH) masses for six quasars at $5.9<z<7.1$ in the textit{Emission-line galaxies and Intergalactic Gas in the Epoch of Reionization} […]


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JADES: Resolving the Stellar Component and Filamentary Overdense Environment of HST-Dark Submillimeter Galaxy HDF850.1 at $z=5.18$

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Fengwu Sun, Jakob M. Helton, Eiichi Egami, Kevin N. Hainline, George H. Rieke | Summary: HDF850.1 is the brightest submillimeter galaxy (SMG) in the Hubble Deep Field. It is known as a heavily dust-obscured star-forming galaxy embedded in an overdense environment at $z = 5.18$. With nine-band […]


Continue.. JADES: Resolving the Stellar Component and Filamentary Overdense Environment of HST-Dark Submillimeter Galaxy HDF850.1 at $z=5.18$

JADES: Resolving the Stellar Component and Filamentary Overdense Environment of HST-Dark Submillimeter Galaxy HDF850.1 at $z=5.18$

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Fengwu Sun, Jakob M. Helton, Eiichi Egami, Kevin N. Hainline, George H. Rieke | Summary: HDF850.1 is the brightest submillimeter galaxy (SMG) in the Hubble Deep Field. It is known as a heavily dust-obscured star-forming galaxy embedded in an overdense environment at $z = 5.18$. With nine-band […]


Continue.. JADES: Resolving the Stellar Component and Filamentary Overdense Environment of HST-Dark Submillimeter Galaxy HDF850.1 at $z=5.18$