Concept
Ring system
Related publications (35)
Metallicity Distribution Functions of 13 Ultra-faint Dwarf Galaxy Candidates from Hubble Space Telescope Narrowband Imaging
Nicolas Lawrence Etienne Longeard
We present uniformly measured stellar metallicities of 463 stars in 13 Milky Way (MW) ultra-faint dwarf galaxies (UFDs; M-V = -7.1 to -0.8) using narrowband CaHK (F395N) imaging taken with the Hubble Space Telescope. This represents the largest homogeneous ...
Bristol2023DFT plus U-type functional derived to explicitly address the flat plane condition
A DFT+U-type corrective functional is derived from first principles to enforce the flat plane condition on localized subspaces, thus dispensing with the need for an ad hoc derivation from the Hubbard model. Small, molecular test systems at the dissociated ...
AMER PHYSICAL SOC2023Semipinacol Rearrangement of Cyclopropenylcarbinols for the Synthesis of Highly Substituted Cyclopropanes
Jérôme Waser, Vladyslav Smyrnov
An electrophile-induced semipinacol rearrangement of cyclopropenylcarbinols is reported. This transformation gives access to various polyfunctionalized cyclopropanes under mild metal-free conditions. The scope of the reaction includes iodine, sulfur and se ...
2023Two Massive, Compact, and Dust-obscured Candidate z ≃ 8 Galaxies Discovered by JWST
We present a search for extremely red, dust-obscured, z > 7 galaxies with JWST/NIRCam+MIRI imaging over the first 20 arcmin(2) of publicly available Cycle 1 data from the COSMOS-Web, CEERS, and PRIMER surveys. Based on their red color in F277W-F444W (simil ...
Bristol2023South Park
This article focuses on the history of one specific area of the city of Tirana, the capital of Albania: the downtown area, or the so-called 'small ring'. The text analyzes the interventions put forward by different administrations (both right and left-wing ...
2023Synthesis of polycyclic aminal heterocycles via decarboxylative cyclisation of dipeptide derivatives
Jérôme Waser, Emma Gabrielle Louise Robert, Eliott Hugo Joran Le Du
An oxidative-decarboxylative intramolecular cyclisation of dipeptide derivatives is reported. This transformation is promoted by phenyl iodine(iii) diacetate (PIDA) in combination with BF3 center dot OEt2. The reaction gives access to a variety of valuable ...
ROYAL SOC CHEMISTRY2022TOCOSMO VIII. A key test of systematics in the hierarchical method of time-delay cosmography
The largest source of systematic errors in the time-delay cosmography method likely arises from the lens model mass distribution, where an inaccurate choice of model could in principle bias the value of H-0. A Bayesian hierarchical framework has been propo ...
EDP SCIENCES S A2022Do the majority of stars form as gravitationally unbound?
Context. Some of the youngest stars (age less than or similar to 10 Myr) are clustered, while many others are observed scattered throughout star forming regions or in complete isolation. It has been intensively debated whether such scattered or isolated st ...
2022Three-membered cyclic digermylenes stabilised by an N-heterocyclic carbene dagger
Treatment of potassium salts of silole dianions with donor stabilised germanium dichlorides gave the anticipated silagermafulvenylidenes R2Si = Ge(Do) (R2Si = 1-silacyclopentadiendiyl, Do = N-heterocyclic carbene (NHC)) only as transient intermediates in a ...
ROYAL SOC CHEMISTRY2021Arbitrarily high time bandwidth performance in a nonreciprocal optical resonator with broken time invariance
Camille Sophie Brès, Hatice Altug, Davide Grassani, Ivan Cardea, Kosmas Tsakmakidis, Simon Julien Fabbri
Most present-day resonant systems, throughout physics and engineering, are characterized by a strict time-reversal symmetry between the rates of energy coupled in and out of the system, which leads to a trade-off between how long a wave can be stored in th ...
2020