Kavli Affiliate: Roger Romani | Summary:We present a model for pulsar filaments – a class of narrow X-ray nebulae misaligned with the proper motion, powered by pulsar-generated $e^pm$. We suggest that cosmic ray-enhanced turbulence drives pitch-angle scattering and dominates $e^pm$ motion along the filament; highly amplified magnetic fields are not required. A simulation built on […]
Kavli Affiliate: Michael Miller | Authors: MoTrPAC Study Group, Daniel H. Katz, Christopher A. Jin, Gina M. Many, Gregory R. Smith, Hasmik Keshishian, Natalie M. Clark, Gayatri Iyer, Cheehoon Ahn, Malene E. Lindholm, Tyler J. Sagendorf, David Amar, Jacob L. Barber, Anna R. Brandt, Paul M. Coen, Yongchao Ge, Patrick Hart, Fang-Chi Hsu, Byron C. […]
Kavli Affiliate: Omar M. Yaghi | Summary:Reticular chemistry has enabled the synthesis of tens of thousands of metal-organic frameworks (MOFs), yet the discovery of new materials still relies largely on intuition-driven linker design and iterative experimentation. As a result, researchers explore only a small fraction of the vast chemical space accessible to reticular materials, limiting […]
Kavli Affiliate: Lina Necib | Summary:We present the first detailed analysis of the effects of dissipative dark matter on stellar streams. As a concrete example, we generate a cosmological hydrodynamic zoom-in simulation of a Milky Way-mass galaxy, assuming that the dark matter consists of Cold Dark Matter (CDM) with a sub-component ($sim6%$) of Atomic Dark […]
Kavli Affiliate: Roberto Maiolino | Summary:The properties of the first metal-free stars remain largely unknown, and so far, the only data-driven constraints on their mass distribution (IMF) come from near-field cosmology. Here, we interpret new observations of the C1 and C2 components of Hebe, the HeII emitter near the galaxy GN-z11. Using a locally calibrated […]
Kavli Affiliate: Roberto Maiolino | Summary:The properties of the first metal-free stars remain largely unknown, and so far, the only data-driven constraints on their mass distribution (IMF) come from near-field cosmology. Here, we interpret new observations of the C1 and C2 components of Hebe, the HeII emitter near the galaxy GN-z11. Using a locally calibrated […]
Kavli Affiliate: Roberto Maiolino | Summary:We report the confirmation of a HeII$λ$1640 emitter located at 3 pkpc from the galaxy GN-z11, at z=10.6. The detection, based on JWST NIRSpec-IFU high-resolution spectroscopy, confirms a previous claim based on medium-resolution spectroscopy. The HeII$λ$1640 identification is further supported by the independent detection of H$γ$ obtained by Übler et […]
Kavli Affiliate: Roberto Maiolino | Summary:We report the confirmation of a HeII$λ$1640 emitter located at 3 pkpc from the galaxy GN-z11, at z=10.6. The detection, based on JWST NIRSpec-IFU high-resolution spectroscopy, confirms a previous claim based on medium-resolution spectroscopy. The HeII$λ$1640 identification is further supported by the independent detection of H$γ$ obtained by Übler et […]
Kavli Affiliate: Roberto Maiolino | Summary:According to the leading cosmological model, a first generation of stars called Population III (PopIII), condensed almost entirely out of hydrogen and helium, must have initiated the creation of all heavier chemical elements. Here we report the detection of ionised hydrogen (H$γ_4342$) with $S/N$=5.9 in a region about 3 pkpc […]
Kavli Affiliate: Luis Ho | Summary:Near-IR Paschen lines are potentially an excellent tracer of Type 1 AGNs that is hardly affected by dust extinction. JWST allows us, for the first time, to explore Paschen-line objects at redshift z>1. Here we present a study of 62 AGNs with broad Pa$α$ and Pa$β$ lines at 1<z<3 using […]