Magnetic Field Properties inside the Jet of Mrk 421: Multiwavelength Polarimetry Including the Imaging X-ray Polarimetry Explorer

Posted by dbos MIT

Kavli Affiliate: Herman L. Marshall | First 5 Authors: Dawoon E. Kim, Laura Di Gesu, Ioannis Liodakis, Alan P. Marscher, Svetlana G. Jorstad | Summary: We conducted a polarimetry campaign from radio to X-ray wavelengths of the high-synchrotron-peak (HSP) blazar Mrk 421, including Imaging X-ray Polarimetry Explorer (IXPE) measurements on 2022 December 6-8. We detected […]


Continue.. Magnetic Field Properties inside the Jet of Mrk 421: Multiwavelength Polarimetry Including the Imaging X-ray Polarimetry Explorer

Divide-and-Conquer Dynamics in AI-Driven Disempowerment

Posted by dbos MIT

Kavli Affiliate: Max Tegmark | First 5 Authors: Peter S. Park, Max Tegmark, , , | Summary: AI companies are attempting to create AI systems that outperform humans at most economically valuable work. Current AI models are already automating away the livelihoods of some artists, actors, and writers. But there is infighting between those who […]


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Divide-and-Conquer Dynamics in AI-Driven Disempowerment

Posted by dbos MIT

Kavli Affiliate: Max Tegmark | First 5 Authors: Peter S. Park, Max Tegmark, , , | Summary: AI companies are attempting to create AI systems that outperform humans at most economically valuable work. Current AI models are already automating away the livelihoods of some artists, actors, and writers. But there is infighting between those who […]


Continue.. Divide-and-Conquer Dynamics in AI-Driven Disempowerment

WD0141-675: A case study on how to follow-up astrometric planet candidates around white dwarfs

Posted by dbos MIT

Kavli Affiliate: Andrew Vanderburg | First 5 Authors: Laura K. Rogers, John Debes, Richard J. Anslow, Amy Bonsor, S. L. Casewell | Summary: This work combines spectroscopic and photometric data of the polluted white dwarf WD0141-675 which has a now retracted astrometric super-Jupiter candidate and investigates the most promising ways to confirm Gaia astrometric planetary […]


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Testing MURaM and MPS-ATLAS against the quiet solar spectrum

Posted by dbos Stanford

Kavli Affiliate: Robert Cameron | First 5 Authors: Veronika Witzke, Alexander I. Shapiro, Nadiia M. Kostogryz, Lucien Mauviard, Tanayveer S. Bhatia | Summary: Three-dimensional (3D) radiative magnetohydrodynamics (MHD) simulations are the only way to model stellar atmospheres without any ad hoc parameterisations. Several 3D radiative MHD codes have achieved good quantitative agreement with observables for […]


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FlexKnot and Gaussian Process for 21 cm global signal analysis and foreground separation

Posted by dbos Cambridge

Kavli Affiliate: George Efstathiou | First 5 Authors: Stefan Heimersheim, Leiv Rønneberg, Henry Linton, Filippo Pagani, Anastasia Fialkov | Summary: The cosmological 21 cm signal is one of the most promising avenues to study the Epoch of Reionization. One class of experiments aiming to detect this signal is global signal experiments measuring the sky-averaged 21 […]


Continue.. FlexKnot and Gaussian Process for 21 cm global signal analysis and foreground separation

FlexKnot and Gaussian Process for 21 cm global signal analysis and foreground separation

Posted by dbos Cambridge

Kavli Affiliate: George Efstathiou | First 5 Authors: Stefan Heimersheim, Leiv Rønneberg, Henry Linton, Filippo Pagani, Anastasia Fialkov | Summary: The cosmological 21 cm signal is one of the most promising avenues to study the Epoch of Reionization. One class of experiments aiming to detect this signal is global signal experiments measuring the sky-averaged 21 […]


Continue.. FlexKnot and Gaussian Process for 21 cm global signal analysis and foreground separation

The Structure Function of Mid-infrared Variability in Low-redshift Active Galactic Nuclei

Posted by dbos Peking

Kavli Affiliate: Luis C. Ho | First 5 Authors: Suyeon Son, Minjin Kim, Luis C. Ho, , | Summary: Using the multi-epoch mid-infrared (MIR) photometry from the Wide-field Infrared Survey Explorer spanning a baseline of $sim10$ yr, we extensively investigate the MIR variability of nearby active galactic nuclei (AGNs) at $0.15 < z < 0.4$. […]


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Boson stars in massless and massive scalar-tensor gravity

Posted by dbos Cambridge

Kavli Affiliate: Ulrich Sperhake | First 5 Authors: Tamara Evstafyeva, Roxana Rosca-Mead, Ulrich Sperhake, Bernd Brugmann, | Summary: We study phenomenological features and stability of boson stars in massless and massive scalar-tensor theory of gravity with Damour-Esposito-Farese coupling. This coupling between the tensor and scalar sectors of the theory leads to a phenomenon called spontaneous […]


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Boson stars in massless and massive scalar-tensor gravity

Posted by dbos Cambridge

Kavli Affiliate: Ulrich Sperhake | First 5 Authors: Tamara Evstafyeva, Roxana Rosca-Mead, Ulrich Sperhake, Bernd Brugmann, | Summary: We study phenomenological features and stability of boson stars in massless and massive scalar-tensor theory of gravity with Damour-Esposito-Farese coupling. This coupling between the tensor and scalar sectors of the theory leads to a phenomenon called spontaneous […]


Continue.. Boson stars in massless and massive scalar-tensor gravity