Signatures of tidal disruption of the Hercules ultra-faint dwarf galaxy

Kavli Affiliate: Anna Frebel | First 5 Authors: Xiaowei Ou, Anirudh Chiti, Nora Shipp, Joshua D. Simon, Marla Geha | Summary: The Hercules ultra-faint dwarf galaxy (UFD) has long been hypothesized to be tidally disrupting, yet no conclusive evidence has been found for tidal disruption owing partly to difficulties in identifying Hercules member stars. In […]


Continue.. Signatures of tidal disruption of the Hercules ultra-faint dwarf galaxy

New probe of non-Gaussianities with primordial black hole induced gravitational waves

Kavli Affiliate: Misao Sasaki | First 5 Authors: Theodoros Papanikolaou, Xin-Chen He, Xiao-Han Ma, Yi-Fu Cai, Emmanuel N. Saridakis | Summary: We propose a new probe of primordial non-Gaussianities (NGs) through the observation of gravitational waves (GWs) induced by ultra-light ($M_{text{PBH}}< 10^{9}rm{g}$) primordial black holes (PBHs). Interestingly enough, the existence of primordial NG can leave […]


Continue.. New probe of non-Gaussianities with primordial black hole induced gravitational waves

New probe of non-Gaussianities with primordial black hole induced gravitational waves

Kavli Affiliate: Misao Sasaki | First 5 Authors: Theodoros Papanikolaou, Xin-Chen He, Xiao-Han Ma, Yi-Fu Cai, Emmanuel N. Saridakis | Summary: We propose a new probe of primordial non-Gaussianities (NGs) through the observation of gravitational waves (GWs) induced by ultra-light ($M_{text{PBH}}< 10^{9}rm{g}$) primordial black holes (PBHs). Interestingly enough, the existence of primordial NG can leave […]


Continue.. New probe of non-Gaussianities with primordial black hole induced gravitational waves

Observational Evidence for Hot Wind Impact on pc-scale in Low-luminosity Active Galactic Nucleus

Kavli Affiliate: Feng Yuan | First 5 Authors: Fangzheng Shi, Feng Yuan, Zhiyuan Li, Zhao Su, Suoqing Ji | Summary: Supermassive black holes in galaxies spend majority of their lifetime in the low-luminosity regime, powered by hot accretion flow. Strong winds launched from the hot accretion flow have the potential to play an important role […]


Continue.. Observational Evidence for Hot Wind Impact on pc-scale in Low-luminosity Active Galactic Nucleus

Stellar Surface Magnetic Fields Impact Limb Darkening

Kavli Affiliate: Sara Seager | First 5 Authors: Nadiia M. Kostogryz, Alexander I. Shapiro, Veronika Witzke, Robert H. Cameron, Laurent Gizon | Summary: Stars appear darker at their limbs than at their disk centers because at the limb we are viewing the higher and cooler layers of stellar photospheres. Limb darkening derived from state-of-the-art stellar […]


Continue.. Stellar Surface Magnetic Fields Impact Limb Darkening

Stellar Surface Magnetic Fields Impact Limb Darkening

Kavli Affiliate: Sara Seager | First 5 Authors: Nadiia M. Kostogryz, Alexander I. Shapiro, Veronika Witzke, Robert H. Cameron, Laurent Gizon | Summary: Stars appear darker at their limbs than at their disk centers because at the limb we are viewing the higher and cooler layers of stellar photospheres. Limb darkening derived from state-of-the-art stellar […]


Continue.. Stellar Surface Magnetic Fields Impact Limb Darkening

Validation of a Third Planet in the LHS 1678 System

Kavli Affiliate: Roland Vanderspek | First 5 Authors: Michele L. Silverstein, Thomas Barclay, Joshua E. Schlieder, Karen A. Collins, Richard P. Schwarz | Summary: The nearby LHS 1678 (TOI-696) system contains two confirmed planets and a wide-orbit, likely-brown-dwarf companion, which orbit an M2 dwarf with a unique evolutionary history. The host star occupies a narrow […]


Continue.. Validation of a Third Planet in the LHS 1678 System

Validation of a Third Planet in the LHS 1678 System

Kavli Affiliate: Avi Shporer | First 5 Authors: Michele L. Silverstein, Thomas Barclay, Joshua E. Schlieder, Karen A. Collins, Richard P. Schwarz | Summary: The nearby LHS 1678 (TOI-696) system contains two confirmed planets and a wide-orbit, likely-brown-dwarf companion, which orbit an M2 dwarf with a unique evolutionary history. The host star occupies a narrow […]


Continue.. Validation of a Third Planet in the LHS 1678 System

Validation of a Third Planet in the LHS 1678 System

Kavli Affiliate: Sara Seager | First 5 Authors: Michele L. Silverstein, Thomas Barclay, Joshua E. Schlieder, Karen A. Collins, Richard P. Schwarz | Summary: The nearby LHS 1678 (TOI-696) system contains two confirmed planets and a wide-orbit, likely-brown-dwarf companion, which orbit an M2 dwarf with a unique evolutionary history. The host star occupies a narrow […]


Continue.. Validation of a Third Planet in the LHS 1678 System

Tip of the iceberg: overmassive black holes at 4<z<7 found by JWST are not inconsistent with the local $mathcal{M}_{rm BH}$-$mathcal{M}_star$ relation

Kavli Affiliate: John D. Silverman | First 5 Authors: Junyao Li, John D. Silverman, Yue Shen, Marta Volonteri, Knud Jahnke | Summary: JWST is revealing a new remarkable population of high-redshift ($zgtrsim4$), low-luminosity Active Galactic Nuclei (AGNs) in deep surveys and detecting the host galaxy stellar light in the most luminous and massive quasars at […]


Continue.. Tip of the iceberg: overmassive black holes at 4<z<7 found by JWST are not inconsistent with the local $mathcal{M}_{rm BH}$-$mathcal{M}_star$ relation