Peking – Kavli Institute Pre-Print Publications

Planetary gas gaps and kinematic signatures in the planet forming disk around WISPIT 2

Posted by klaurent September 4, 2026Peking

Kavli Affiliate: Ruobing Dong | Summary:The giant planet formation process in disks of gas and dust surrounding young stars is observationally still poorly constrained. Direct detection of protoplanets within the disk remains limited with current facilities. Indirect observational evidence of protoplanets through substructures or deviations from Keplerian rotation in the gas remains ambiguous in absence […]

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Learning CNN Filters via Generalized Stein’s Method

Posted by klaurent September 2, 2026Peking

Kavli Affiliate: Feng Long| Summary: Convolutional Neural Networks (CNNs) have undoubtedly revolutionized image data analysis and the field of computer vision. As the cornerstone of CNNs, the convolution operation enables the networks to extract abstract features and uncover hidden relationships in the image data. This paper considers the problem of estimating convolution filters from a […]

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Spatial-sign-based multilinear principal component analysis for tensor data

Posted by klaurent August 30, 2026Peking

Kavli Affiliate: Feng Long| Summary: Multilinear principal component analysis (MPCA) reduces the dimension of tensor-valued data while preserving their mode-specific structure, but its quadratic scatter criterion can be unstable under heavy-tailed distributions and contamination. We propose spatial-sign-based multilinear principal component analysis (SMPCA), a robust dimension-reduction method that centers the observations by their spatial median, removes […]

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Cooling-regulated gas accretion onto gap-opening planets

Posted by klaurent August 28, 2026August 31, 2026Peking, This Week: Astrophysics

Kavli Affiliate: Ruobing Dong | Summary:Gas accretion onto forming planets controls the final masses of giant planets and provides observable signatures of ongoing formation. How this process depends on the cooling properties of these newly attracted gas remains poorly constrained. We present long-term, three-dimensional global hydrodynamical simulations to quantify gas accretion onto gap-opening planets in […]

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From Inspiral to Expansion: The Wake-Driven Torque on Binary Black Holes in Gaseous Medium

Posted by klaurent August 28, 2026August 31, 2026Peking, This Week: Astrophysics

Kavli Affiliate: Lile Wang |Summary:Binary black holes (BBHs) in gaseous medium, such as active galactic nucleus (AGN) disks, are important gravitational-wave sources, yet the gas-driven torque that governs their orbital evolution remains to be fully understood. Most existing studies of BBHs in gas often approximate the net torque as the sum of independent dynamical friction […]

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ELUCID-DESI II. Revealing dark matter mass, tidal, and velocity (MTV) fields using galaxy group phase information

Posted by klaurent August 27, 2026August 31, 2026Peking, This Week: Astrophysics

Kavli Affiliate: Yingjie Peng | Summary:We introduce a novel method for reconstructing the cosmic mass, tidal, and velocity (MTV) fields over the redshift range $0 < z < 0.6$ using the phase information of galaxy groups. This approach replaces the explicit theoretical bias correction typically needed to relate galaxy groups to the underlying dark matter […]

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A systematic study of AGN feedback in a disk galaxy using MACER. III. High Gas Fractions in AGN Hosts

Posted by klaurent August 26, 2026August 31, 2026Peking, This Week: Astrophysics

Kavli Affiliate: Luis Ho | Summary:We use high-resolution hydrodynamic simulations in the MACER framework to explain why low-redshift PG quasar hosts can retain substantial cold-gas reservoirs, with gas fractions and gas-to-stellar mass ratios showing little dependence on instantaneous AGN luminosity. This paper is the third in a series systematically studying AGN feedback in a disk […]

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A superflare of BP Tau simultaneously caught by EP X-ray and TESS optical observations

Posted by klaurent August 23, 2026Peking

Kavli Affiliate: Gregory Herczeg | Summary:Multiwavelength observations of stellar flares trace the activity of different components of the stars’ outer atmosphere, providing insight into their interactions. In the present paper, we report a superflare from BP Tau, simultaneously observed with the Wide-field X-ray Telescope (WXT) on board the Einstein Probe (EP) satellite and TESS. While […]

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Pandora cluster Lensing, AGN, and Transient Exploration (PLATE) from JWST Multi-Epoch Imaging. I. Discovery of a type II supernova candidate in a spiral galaxy at $z=0.7$

Posted by klaurent August 21, 2026August 31, 2026Peking

Kavli Affiliate: Subo Dong | Summary:We report the discovery and multi-wavelength analysis of a $zsim0.7$ transient PLATE-23a in the Abell 2744 field, as the first results of the Pandora Lensing, AGN, and Transient Exploration (PLATE) project. Using multi-epoch JWST NIRCam imaging spanning from 2022 to 2025, we detect PLATE-23a in 12 filters. Difference-imaging analysis reveals […]

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The VariableTNG project: mass-dependent regulation of galaxy morphology by baryonic feedback

Posted by klaurent August 20, 2026Peking

Kavli Affiliate: Luis Ho | Summary:Galaxy morphology is shaped by both assembly history and baryonic processes, but their relative roles remain uncertain. We use the VariableTNG (VTNG) simulation suite to investigate how variations in baryonic feedback regulate galaxy morphology while keeping the initial conditions fixed. VTNG consists of cosmological magnetohydrodynamic simulations performed with the moving-mesh […]

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