Kavli Affiliate: J. S. Villasenor | First 5 Authors: J. Fernando Barbero G., J. Fernando Barbero G., , , | Summary: We show how the Husain-Kuchavr model can be understood as a Carrollian limit of the Holst term in the context of background-independent field theories described in terms of coframes and spin connections. We also […]
Kavli Affiliate: Sara Seager | First 5 Authors: , , , , | Summary: Many possible interior compositions exist for sub-Neptunes: ice-poor, ice-rich, and water-dominated interiors can all match the measured masses and radii. Motivated by recent theory of carbon-rich planet formation outside of the refractory organic carbon "soot line" and observations of carbon-rich protoplanetary […]
Kavli Affiliate: Renxin Xu | First 5 Authors: Wen-Li Yuan, Wen-Li Yuan, , , | Summary: We extend the modified Nambu-Jona-Lasinio (NJL) model — incorporating exchange interactions via the Fierz transformation — to finite temperatures in both two- and three-flavor scenarios, and investigate the properties of protoquark stars in $beta$-equilibrium. Our results show that increasing […]
Kavli Affiliate: Marshall W. Bautz | First 5 Authors: Abigail Y. Pan, Abigail Y. Pan, , , | Summary: The Advanced X-ray Imaging Satellite (AXIS) is one of two candidate mission concepts selected for Phase-A study for the new NASA Astrophysics Probe Explorer (APEX) mission class, with a planned launch in 2032. The X-ray camera […]
Kavli Affiliate: Marshall W. Bautz | First 5 Authors: Catherine E. Grant, Catherine E. Grant, , , | Summary: The Advanced X-ray Imaging Satellite (AXIS), an astrophysics NASA probe mission currently in phase A, will provide high-throughput, high-spatial resolution X-ray imaging in the 0.3 to 10 keV band. We report on the notional ground calibration […]
Kavli Affiliate: Marshall W. Bautz | First 5 Authors: Haley R. Stueber, Haley R. Stueber, , , | Summary: Future strategic X-ray missions, such as the Advanced X-ray Imaging Satellite (AXIS) and those targeted by the Great Observatories Maturation Program (GOMaP), require fast, low-noise X-ray imaging spectrometers. To achieve the speed and noise capabilities required […]
Kavli Affiliate: Gregory Prigozhin | First 5 Authors: Tanmoy Chattopadhyay, Tanmoy Chattopadhyay, , , | Summary: The first generation of Single electron Sensitive Read Out (SiSeRO) amplifiers, employed as on-chip charge detectors for charge-coupled devices (CCDs) have demonstrated excellent noise and spectral performance: a responsivity of around 800 pA per electron, an equivalent noise charge […]
Kavli Affiliate: Robert Goeke | First 5 Authors: Eric D. Miller, Eric D. Miller, , , | Summary: AXIS, a Probe mission concept now in a Phase A study, will provide transformative studies of high-energy astrophysical phenomena thanks to its high-resolution X-ray spectral imaging. These capabilities are enabled by improvements to the mirror design that […]
Kavli Affiliate: Jing Wang | First 5 Authors: Ye Li, Ye Li, , , | Summary: The physical origin of fast radio bursts (FRBs) remains uncertain. Although multiwavelength observations offer critical diagnostics and have been widely conducted, only Galactic FRB~20200428D is associated with an X-ray burst from the magnetar SGR J1935+2154. Here, we present multiwavelength […]
Kavli Affiliate: George Efstathiou | First 5 Authors: Jiten Dhandha, Jiten Dhandha, , , | Summary: The cosmic 21-cm signal is a promising probe of the early Universe, owing to its sensitivity to the thermal state of the neutral intergalactic medium (IGM) and properties of the first luminous sources. In this work, we constrain the […]