Supercritical growth pathway to overmassive black holes at cosmic dawn: coevolution with massive quasar hosts

Kavli Affiliate: Kohei Inayoshi | First 5 Authors: Haojie Hu, Kohei Inayoshi, Zoltán Haiman, Wenxiu Li, Eliot Quataert | Summary: Observations of the most luminous quasars at high redshifts ($z > 6$) have revealed that the largest supermassive black holes (SMBHs) at those epochs tend to be substantially overmassive relative to their host galaxies compared […]


Continue.. Supercritical growth pathway to overmassive black holes at cosmic dawn: coevolution with massive quasar hosts

Constraining SIDM with halo shapes: revisited predictions from realistic simulations of early-type galaxies

Kavli Affiliate: Mark Vogelsberger | First 5 Authors: Giulia Despali, Levi G. Walls, Simona Vegetti, Martin Sparre, Mark Vogelsberger | Summary: We study the effect of self-interacting dark matter (SIDM) and baryons on the shapes of early-type galaxies (ETGs) and their dark matter haloes, comparing them to the predictions of the standard cold dark matter […]


Continue.. Constraining SIDM with halo shapes: revisited predictions from realistic simulations of early-type galaxies

Quantum Simulations of Dark Sector Showers

Kavli Affiliate: Masahito Yamazaki | First 5 Authors: So Chigusa, Masahito Yamazaki, , , | Summary: We consider dark sector scenarios where dark matter is accompanied by a dark photon and multiple-flavor dark fermions charged under the dark gauge group. We study quantum interference effects in dark sector jets, where multiple dark photons are emitted […]


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Detection of gamma-ray emission from the Sagittarius Dwarf Spheroidal galaxy

Kavli Affiliate: Shunsaku Horiuchi | First 5 Authors: Roland M. Crocker, Oscar Macias, Dougal Mackey, Mark R. Krumholz, Shin’ichiro Ando | Summary: The Fermi Bubbles are giant, gamma-ray emitting lobes emanating from the nucleus of the Milky Way discovered in 1-100 GeV data collected by the Large Area Telescope on board the Fermi Gamma-Ray Space […]


Continue.. Detection of gamma-ray emission from the Sagittarius Dwarf Spheroidal galaxy

Gamma-ray emission from the Sagittarius Dwarf Spheroidal galaxy due to millisecond pulsars

Kavli Affiliate: Shunsaku Horiuchi | First 5 Authors: Roland M. Crocker, Oscar Macias, Dougal Mackey, Mark R. Krumholz, Shin’ichiro Ando | Summary: The Fermi Bubbles are giant, gamma-ray emitting lobes emanating from the nucleus of the Milky Way discovered in ~1-100 GeV data collected by the Large Area Telescope on board the Fermi Gamma-Ray Space […]


Continue.. Gamma-ray emission from the Sagittarius Dwarf Spheroidal galaxy due to millisecond pulsars

Ergomagnetosphere, Ejection Disc, Magnetopause in M87. I Global Flow of Mass, Angular Momentum, Energy and Current

Kavli Affiliate: Roger Blandford | First 5 Authors: Roger Blandford, Noemie Globus, , , | Summary: We interpret the 1.3mm VLBI observations made by the Event Horizon Telescope of the black hole in M87. It is proposed that, instead of being a torus of accreting gas, the ring is a rotating, magnetically-dominated ergomagnetosphere that can […]


Continue.. Ergomagnetosphere, Ejection Disc, Magnetopause in M87. I Global Flow of Mass, Angular Momentum, Energy and Current

Ergomagnetosphere, Ejection Disc, Magnetopause in M87. I Global Flow of Mass, Angular Momentum, Energy and Current

Kavli Affiliate: Roger Blandford | First 5 Authors: Roger Blandford, Noemie Globus, , , | Summary: We interpret the 1.3mm VLBI observations made by the Event Horizon Telescope of the black hole in M87. It is proposed that, instead of being a torus of accreting gas, the observed annular ring is a rotating, magnetically-dominated ergomagnetosphere […]


Continue.. Ergomagnetosphere, Ejection Disc, Magnetopause in M87. I Global Flow of Mass, Angular Momentum, Energy and Current

A Mini-Neptune from TESS and CHEOPS Around the 120 Myr Old AB Dor member HIP 94235

Kavli Affiliate: George Ricker | First 5 Authors: George Zhou, Christopher P. Wirth, Chelsea X. Huang, Alexander Venner, Kyle Franson | Summary: The TESS mission has enabled discoveries of the brightest transiting planet systems around young stars. These systems are the benchmarks for testing theories of planetary evolution. We report the discovery of a mini-Neptune […]


Continue.. A Mini-Neptune from TESS and CHEOPS Around the 120 Myr Old AB Dor member HIP 94235

Inferences on relations between distant supermassive black holes and their hosts complemented by the galaxy fundamental plane

Kavli Affiliate: John Silverman | First 5 Authors: John Silverman, Junyao Li, Xuheng Ding, , | Summary: The realization of fundamental relations between supermassive black holes and their host galaxies would have profound implications in astrophysics. To add further context to studies of their co-evolution, an investigation is carried out to gain insight as to […]


Continue.. Inferences on relations between distant supermassive black holes and their hosts complemented by the galaxy fundamental plane

Testing High-Energy Emission Models for Blazars with X-ray Polarimetry

Kavli Affiliate: Roger W. Romani | First 5 Authors: Abel L. Peirson, Ioannis Liodakis, Roger W. Romani, , | Summary: Both leptonic and hadronic emission processes may contribute to blazar jet emission; which dominates in blazars’s high energy emission component remains an open question. Some intermediate synchrotron peaked blazars transition from their low to high […]


Continue.. Testing High-Energy Emission Models for Blazars with X-ray Polarimetry