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Gravitational Wave Forecasts Constrained by JWST AGN Observations for Early Massive Black Hole Mergers

Autor: Liu, Hanpu, Inayoshi, Kohei

Massive black holes (BHs) grow by gas accretion and mergers, observable through electromagnetic (EM) and gravitational wave (GW) emission. The James Webb Space Telescope (JWST) has detected faint active galactic nuclei (AGNs), revealing an abundant p

Externí odkaz: http://arxiv.org/abs/2409.18194

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An outburst and FU Ori-type disk of a former low luminosity protostar

Autor: Ashraf, Mizna, Jose, Jessy, Lee, Ho-Gyu, Peña, Carlos Contreras, Herczeg, Gregory J, Liu, Hanpu, Johnstone, Doug, Lee, Jeong-Eun

Strong accretion outbursts onto protostars are associated with emission dominated by a viscously heated disk, which is characterized by high luminosities. We report the discovery and characterization of a strong mid-IR (3.4, 4.6 $\mu$m) outburst in t

Externí odkaz: http://arxiv.org/abs/2312.10827

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The Dusty Rossby Wave Instability (DRWI): Linear Analysis and Simulations of Turbulent Dust-Trapping Rings in Protoplanetary Discs

Autor: Liu, Hanpu, Bai, Xue-Ning

Recent numerical simulations have revealed that dust clumping and planetesimal formation likely proceed in ring-like disc substructures, where dust gets trapped in weakly turbulent pressure maxima. The streaming instability has difficulty operating i

Externí odkaz: http://arxiv.org/abs/2308.13108

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Photometric and Spectroscopic monitoring of YSOs in nearby star forming regions. I. Eruptive YSOs

Autor: Peña, Carlos Contreras, Herczeg, Gregory J., Ashraf, Mizna, Jose, Jessy, Lee, Ho-Gyu, Johnstone, Doug, Lee, Jeong-Eun, Zhou, Xing-yu, Liu, Hanpu, Yoon, Sung-Yong

Mid-infrared (mid-IR) variability in young stellar objects (YSOs) is driven by several physical mechanisms, which produce a variety of amplitudes and light curve shapes. One of these mechanisms, variable disk accretion is predicted by models of episo

Externí odkaz: http://arxiv.org/abs/2303.08390

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Diagnosing FUor-like Sources: The Parameter Space of Viscously Heated Disks in the Optical and Near-IR

Autor: Liu, Hanpu, Herczeg, Gregory J., Johnstone, Doug, Contreras-Peña, Carlos, Lee, Jeong-Eun, Yang, Haifeng, Zhou, Xingyu, Yoon, Sung-Yong, Lee, Ho-Gyu, Kunitomo, Masanobu, Jose, Jessy

FU Ori type objects (FUors) are decades-long outbursts of accretion onto young stars that are strong enough to viscously heat disks so that the disk outshines the central star. We construct models for FUor objects by calculating emission components f

Externí odkaz: http://arxiv.org/abs/2207.13324

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