Evidence for A Hot Wind from High-resolution X-ray Spectroscopic Observation of the Low-luminosity Active Galactic Nucleus in NGC 7213

Kavli Affiliate: Feng Yuan | First 5 Authors: Fangzheng Shi, Bocheng Zhu, Zhiyuan Li, Feng Yuan, | Summary: Super-massive black holes (SMBHs) spend most of their lifetime accreting at a rate well below the Eddington limit, manifesting themselves as low-luminosity active galactic nuclei (LLAGNs). The prevalence of a hot wind from LLAGNs is a generic […]


Continue.. Evidence for A Hot Wind from High-resolution X-ray Spectroscopic Observation of the Low-luminosity Active Galactic Nucleus in NGC 7213

Milli-Hertz Gravitational Wave Background Produced by Quasi-Periodic Eruptions

Kavli Affiliate: Xian Chen | First 5 Authors: Xian Chen, Yu Qiu, Shuo Li, F. K. Liu, | Summary: Extreme-mass-ratio inspirals (EMRIs) are important targets for future space-borne gravitational-wave (GW) detectors, such as the Laser Interferometer Sapce Antenna (LISA). Recent works suggest that EMRI may reside in a population of newly discovered X-ray transients called […]


Continue.. Milli-Hertz Gravitational Wave Background Produced by Quasi-Periodic Eruptions

The radio spectral turnover of radio-loud quasars at $z>5$

Kavli Affiliate: Ran Wang | First 5 Authors: Yali Shao, Jeff Wagg, Ran Wang, Emmanuel Momjian, Chris L. Carilli | Summary: We present Karl G. Jansky Very Large Array (VLA) S- (2–4 GHz), C- (4–8 GHz), and X-band (8–12 GHz) continuum observations toward seven radio-loud quasars at $z>5$. This sample has previously been found to […]


Continue.. The radio spectral turnover of radio-loud quasars at $z>5$

Could TDE outflows produce the PeV neutrino events?

Kavli Affiliate: Zhuo Li | First 5 Authors: Han-Ji Wu, Guo-Bin Mou, Kai Wang, Wei Wang, Zhuo Li | Summary: The origin of ultra-high energy neutrinos still lacks observational evidence, besides, the physical mechanism is also unclear. There is an association of a PeV neutrino event (IceCube-191001A) with an optical tidal disruption event (TDE, AT2019dsg) […]


Continue.. Could TDE outflows produce the PeV neutrino events?

AutoDrop: Training Deep Learning Models with Automatic Learning Rate Drop

Kavli Affiliate: Jing Wang | First 5 Authors: Yunfei Teng, Jing Wang, Anna Choromanska, , | Summary: Modern deep learning (DL) architectures are trained using variants of the SGD algorithm that is run with a $textit{manually}$ defined learning rate schedule, i.e., the learning rate is dropped at the pre-defined epochs, typically when the training loss […]


Continue.. AutoDrop: Training Deep Learning Models with Automatic Learning Rate Drop

Detection of a Parsec-Scale Jet in a Radio-Quiet Narrow-Line Seyfert 1 Galaxy with Highly Accreting Supermassive Black Hole

Kavli Affiliate: Ran Wang | First 5 Authors: Su Yao, Xiaolong Yang, Minfeng Gu, Tao An, Jun Yang | Summary: The jet in active galactic nuclei (AGN) is a key ingredient in understanding the co-evolution of galaxies and their central supermassive black holes (SMBHs). Unfortunately, the mechanism of jet launching and collimation is still elusive. […]


Continue.. Detection of a Parsec-Scale Jet in a Radio-Quiet Narrow-Line Seyfert 1 Galaxy with Highly Accreting Supermassive Black Hole

Evidence for the connection between star formation rate and evolutionary phases of quasars

Kavli Affiliate: Luis C. Ho | First 5 Authors: Zhifu Chen, Zhicheng He, Luis C. Ho, Qiusheng Gu, Tinggui Wang | Summary: Both theory and observations suggest that outflows driven by an active central supermassive black hole (SMBH) has a feedback effect on shaping the global properties of the host galaxy. However, whether feedback from […]


Continue.. Evidence for the connection between star formation rate and evolutionary phases of quasars

Plasmon Coupling Induced Photon Scattering Torque

Kavli Affiliate: Jing Wang | First 5 Authors: Yang Li, Jing Wang, Hai-Qing Lin, Lei Shao, | Summary: Bio-compatible Au nanoparticles exhibit great advantages in the application of biomedical researches, such as bio-sensing, medical diagnosis, and cancer therapy. Bio-molecules can even be manipulated by laser tweezers with the optically trapped Au nanoparticles as handles. In […]


Continue.. Plasmon Coupling Induced Photon Scattering Torque

Large deviation principle for stochastic generalized Ginzburg-Landau equation driven by jump noise

Kavli Affiliate: Ran Wang | First 5 Authors: Ran Wang, Beibei Zhang, , , | Summary: In this paper, we establish a large deviation principle for the stochastic generalized Ginzburg-Landau equation driven by jump noise. The main difficulties come from the highly non-linear coefficient. Here we adopt a new sufficient condition for the weak convergence […]


Continue.. Large deviation principle for stochastic generalized Ginzburg-Landau equation driven by jump noise

Inspiraling Corrugation-Induced Quantum Effects on Neutron Star Binary Plane

Kavli Affiliate: Jing Wang | First 5 Authors: Jing Wang, , , , | Summary: We use the path-integral formula and investigate some dynamical quantum effects induced by the inspiraling lateral corrugation of orbital plane in gravitationally bound neutron star (NS) binaries, with orbital separation of $10^9$ m. Based on Dewitt’s approach, we calculate the […]


Continue.. Inspiraling Corrugation-Induced Quantum Effects on Neutron Star Binary Plane