Backlighting extended gas halos around luminous red galaxies: kinematic Sunyaev-Zel’dovich effect from DESI Y1 x ACT

Posted by dbos Tokyo

Kavli Affiliate: David N. Spergel | First 5 Authors: Bernardita Ried Guachalla, Emmanuel Schaan, Boryana Hadzhiyska, Simone Ferraro, Jessica N. Aguilar | Summary: The gas density profile around galaxies, shaped by feedback and affecting the galaxy lensing signal, is imprinted on the cosmic microwave background (CMB) by the kinematic Sunyaev-Zel’dovich effect (kSZ). We precisely measure […]


Continue.. Backlighting extended gas halos around luminous red galaxies: kinematic Sunyaev-Zel’dovich effect from DESI Y1 x ACT

Dip and non-linearity in the curvature perturbation from inflation with a transient non-slow-roll stage

Posted by dbos Tokyo

Kavli Affiliate: Misao Sasaki | First 5 Authors: Tomohiro Fujita, Ryodai Kawaguchi, Misao Sasaki, Yuichiro Tada, | Summary: We consider models of inflation that contain a transient non-slow-roll stage and investigate the conditions under which a dip appears in the power spectrum of the curvature perturbation. Using the $delta N$ formalism, we derive a general […]


Continue.. Dip and non-linearity in the curvature perturbation from inflation with a transient non-slow-roll stage

Singular instantons with finite action

Posted by dbos Tokyo

Kavli Affiliate: Misao Sasaki | First 5 Authors: Misao Sasaki, Vicharit Yingcharoenrat, Ying-li Zhang, , | Summary: Recently, it was shown that in the absence of gravity there exist non-$O(4)$-symmetric instanton solutions with finite action beyond Coleman’s instantons. In this paper, focusing on the false-vacuum decay in a single scalar field in flat Euclidean space, […]


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Resurgent properties of $Toverline{T}$-deformed conformal field theories

Posted by dbos UCAS

Kavli Affiliate: Huajia Wang | First 5 Authors: Jie Gu, Yunfeng Jiang, Huajia Wang, , | Summary: We elaborate on the resurgence analysis on the $Toverline{T}$-deformed 2d conformal field theory (CFT). Writing the deformed partition function as an infinite series in the deformation parameter $lambda$, we develop efficient analytical methods to compute high-order terms of […]


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Flipping of the tidal tails of the Ophiuchus stream due to the decelerating Galactic bar

Posted by dbos Chicago

Kavli Affiliate: Alexander P. Ji | First 5 Authors: Yong Yang, Geraint F. Lewis, Denis Erkal, Ting S. Li, Andrew P. Li | Summary: The Ophiuchus stellar stream presents a puzzle due to its complicated morphology, with a substructure perpendicular to the main track (spur), a broadened tail (fanning), and a shorter than expected angular […]


Continue.. Flipping of the tidal tails of the Ophiuchus stream due to the decelerating Galactic bar

Discovery of Quasi-periodic Eruptions in the Tidal Disruption Event and Extreme Coronal Line Emitter AT2022upj: implications for the QPE/TDE fraction and a connection to ECLEs

Posted by dbos MIT

Kavli Affiliate: Erin Kara | First 5 Authors: Joheen Chakraborty, Erin Kara, Riccardo Arcodia, Johannes Buchner, Margherita Giustini | Summary: Quasi-periodic eruptions (QPEs) are recurring soft X-ray transients emerging from the vicinity of supermassive black holes (SMBHs) in nearby, low-mass galaxy nuclei; about ten QPE hosts have been identified thus far. Here we report the […]


Continue.. Discovery of Quasi-periodic Eruptions in the Tidal Disruption Event and Extreme Coronal Line Emitter AT2022upj: implications for the QPE/TDE fraction and a connection to ECLEs

Observing Dark Matter Decays to Gravitons via Graviton-Photon Conversion

Posted by dbos Chicago

Kavli Affiliate: Gordan Krnjaic | First 5 Authors: David I. Dunsky, Gordan Krnjaic, Elena Pinetti, , | Summary: Since dark matter is only known to have gravitational interactions, it may plausibly decay to gravitons on cosmological timescales. Although such a scenario can be easily realized, there are currently no known limits on this possibility based […]


Continue.. Observing Dark Matter Decays to Gravitons via Graviton-Photon Conversion

Effective field theory for triple-Q magnetic orders on a hexagonal lattice

Posted by klaurent UCAS

Kavli Affiliate: Yi Zhou | First 5 Authors: Jin-Tao Jin, Yi Zhou, , , | Summary: We develop a comprehensive Ginzburg-Landau theory describing triple-Q magnetic orders on hexagonal lattices, focusing on $O(N)$ models with $N=2$ and $N=3$. Through systematic analysis of symmetry-allowed terms in the free energy, we establish complete phase diagrams governed by competing […]


Continue.. Effective field theory for triple-Q magnetic orders on a hexagonal lattice

Effective field theory for triple-Q magnetic orders on a hexagonal lattice

Posted by klaurent UCAS

Kavli Affiliate: Yi Zhou | First 5 Authors: Jin-Tao Jin, Yi Zhou, , , | Summary: We develop a comprehensive Ginzburg-Landau theory describing triple-Q magnetic orders on hexagonal lattices, focusing on $O(N)$ models with $N=2$ and $N=3$. Through systematic analysis of symmetry-allowed terms in the free energy, we establish complete phase diagrams governed by competing […]


Continue.. Effective field theory for triple-Q magnetic orders on a hexagonal lattice