Galaxy cluster characterization with machine learning techniques

Kavli Affiliate: Michael McDonald | First 5 Authors: Maria Sadikov, Julie Hlavacek-Larrondo, Laurence Perreault Levasseur, Carter Lee Rhea, Michael McDonald | Summary: We present an analysis of the X-ray properties of the galaxy cluster population in the z=0 snapshot of the IllustrisTNG simulations, utilizing machine learning techniques to perform clustering and regression tasks. We examine […]


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Temporal regularity for the stochastic heat equation with rough dependence in space

Kavli Affiliate: Ran Wang | First 5 Authors: Bin Qian, Min Wang, Ran Wang, Yimin Xiao, | Summary: Consider the nonlinear stochastic heat equation $$ frac{partial u (t,x)}{partial t}=frac{partial^2 u (t,x)}{partial x^2}+ sigma(u (t,x))dot{W}(t,x),quad t> 0,, xin mathbb{R}, $$ where $dot W$ is a Gaussian noise which is white in time and has the covariance […]


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Dark matter from inflationary quantum fluctuations

Kavli Affiliate: Misao Sasaki | First 5 Authors: Mohammad Ali Gorji, Misao Sasaki, Teruaki Suyama, , | Summary: We explore a scenario in which dark matter is a massive bosonic field, arising solely from quantum fluctuations generated during inflation. In this framework, dark matter exhibits primordial isocurvature perturbations with an amplitude of ${cal O}(1)$ at […]


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Crystals and Double Quiver Algebras from Jeffrey-Kirwan Residues

Kavli Affiliate: Masahito Yamazaki | First 5 Authors: Jiakang Bao, Masahito Yamazaki, , , | Summary: We construct statistical mechanical models of crystal melting describing the flavoured Witten indices of $mathcal{N}ge 2$ supersymmetric quiver gauge theories. Our results can be derived from the Jeffrey-Kirwan (JK) residue formulas, and generalize the previous results for quivers corresponding […]


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Strong Lensing analysis of SPT-CLJ2325$-$4111 and SPT-CLJ0049$-$2440, two Powerful Cosmic Telescopes ($R_E > 40”$) from the SPT Clusters Sample

Kavli Affiliate: Lindsey E. Bleem | First 5 Authors: Guillaume Mahler, Keren Sharon, Matthew Bayliss, Lindsey. E. Bleem, Mark Brodwin | Summary: We report the results from a study of two massive ($M_{500c} > 6.0 times 10^{14} M_{odot}$) strong lensing clusters selected from the South Pole Telescope cluster survey for their high Einstein radius ($R_E […]


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HST Observations within the Sphere of Influence of the Powerful Supermassive Black Hole in PKS0745-191

Kavli Affiliate: Michael McDonald | First 5 Authors: Julie Hlavacek-Larrondo, Hyunseop Choi, Minghao Guo, Annabelle Richard-Laferrière, Carter Rhea | Summary: We present Space Telescope Imaging Spectrograph observations from the Hubble Space Telescope of the supermassive black hole (SMBH) at the center of PKS0745-191, a brightest cluster galaxy (BCG) undergoing powerful radio-mode AGN feedback ($P_{rm cav}sim5times10^{45}$ […]


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Time-resolved Hubble Space Telescope UV observations of an X-ray quasi-periodic eruption source

Kavli Affiliate: Dheeraj R. Pasham | First 5 Authors: Thomas Wevers, Muryel Guolo, Sean Lockwood, Andrew Mummery, Dheeraj R. Pasham | Summary: X-ray quasi-periodic eruptions (QPEs) are a novel mode of variability in nearby galactic nuclei whose origin remains unknown. Their multi-wavelength properties are poorly constrained, as studies have focused almost entirely on the X-ray […]


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Clumps as multiscale structures in cosmic noon galaxies

Kavli Affiliate: John D. Silverman | First 5 Authors: Boris S Kalita, Tomoko L Suzuki, Daichi Kashino, John D Silverman, Emanuele Daddi | Summary: Star-forming clumps have been found to significantly influence the star formation of gas-rich $z>1$ galaxies. Using public data from JWST/NIRCam (COSMOS-Web) and ALMA (FMOS-COSMOS), we study a sample of 32 massive […]


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A multi-wavelength investigation of spiral structures in $z > 1$ galaxies with JWST

Kavli Affiliate: John D. Silverman | First 5 Authors: Boris S. Kalita, Si-Yue Yu, John D. Silverman, Emanuele Daddi, Luis C. Ho | Summary: Recent JWST observations have revealed the prevalence of spiral structures at $z > 1$. Unlike in the local Universe, the origin and the consequence of spirals at this epoch remain unexplored. […]


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Twinkle: A GPU-based binary-lens microlensing code with contour integration method

Kavli Affiliate: Subo Dong | First 5 Authors: Suwei Wang, Lile Wang, Subo Dong, , | Summary: With the rapidly increasing rate of microlensing planet detections, microlensing modeling software faces significant challenges in computation efficiency. Here, we develop the Twinkle code, an efficient and robust binary-lens modeling software suite optimized for heterogeneous computing devices, especially […]


Continue.. Twinkle: A GPU-based binary-lens microlensing code with contour integration method