Results 111 to 120 of about 8,356 (263)

Origin and formation of a chondritic xenolith in Krymka (LL3.2, breccia): Indications for a late formation of the accretionary breccia

Meteoritics &Planetary Science, EarlyView.
Abstract An unusual chondritic xenolith was found in two sequentially prepared thin sections of a sample from the Krymka (LL3.2) chondrite. The xenolith has a rounded, slightly deformed shape of about 5 mm in apparent diameter and is partially surrounded by a double rim made of an inner fine‐grained silicate‐rich rim and an outer sulfide‐rich rim.
Aelita Girich, Addi Bischoff, Samuel Ebert, Kazuhide Nagashima, Andreas Morlok, Harald Hiesinger, Jasper Berndt   +6 more
wiley   +1 more source

A Cometary Fluorescence Model for the ν3 Vibrational Band of Cyanogen

The Astrophysical Journal
Cyanogen (C _2 N _2 ) has been suspected for a long time to be present in comets and to contribute to the creation of the CN radical. So far no observations with ground-based facilities have managed to detect this species, but the Rosetta mission, thanks
P. Hardy, P. Rousselot, C. Richard, V. Boudon, X. Landsheere, A. Voute, L. Manceron, F. Kwabia Tchana   +7 more
doaj   +1 more source

Uncovering the impact of the cardiovascular system on cerebrovascular health using MRI

Experimental Physiology, EarlyView.
Abstract Human cerebrovasculature is finely tuned to enable local changes in blood flow to meet the brain's demands, whilst protecting the brain from systemic changes in blood pressure, both acutely during a heartbeat and chronically over time. This review summarises cerebrovascular structure and function, their role in disease and neurodegeneration ...
Ian D. Driver, Kevin Murphy
wiley   +1 more source

An Ultrafast Time Resolved Infrared and Computational Study of the Photochemistry of Ethyl 2‐Diazo‐3,3,3‐Trifluoropropanoate (CF3CN2CO2Et)

Journal of Physical Organic Chemistry, Volume 39, Issue 8, August 2026.
The photochemistry of ethyl 2‐diazo‐3,3,3‐trifluoropropanoate shows that its excited singlet state undergoes internal conversion, carbene formation, and diazirine formation. The resulting singlet carbene reacts through solvent‐dependent pathways, forming ylides in methanol and acetonitrile or a C–Cl insertion product in chloroform.
Jojo Joseph, Jacek Kubicki, Mrinal Chakraborty, Gotard Burdziński, William H. Coldren, Hoi Ling Luk, Carolyn S. Reid, Matthew S. Platz, Christopher M. Hadad   +8 more
wiley   +1 more source

Long‐Term IASI Observations of Upper Tropospheric CO in the Asian Summer Monsoon Region: Trends and Eddy Shedding Signatures

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 11, 16 June 2026.
Abstract The Asian Summer Monsoon (ASM) acts as a key mechanism for the vertical transport of surface pollutants into the upper troposphere (UT), which can have far‐reaching impacts on air quality and climate at regional to global scales. We analyze 16 years (2008–2023) of carbon monoxide (CO) observations from the Infrared Atmospheric Sounding ...
Anne Boynard, Camille Viatte, Laura L. Pan, Shawn B. Honomichl, Angel Luque Lazaro, Selviga Sinnathamby, Juliette Hadji‐Lazaro, Warren P. Smith, Qing Liang, Francesco D'Amato, Silvia Viciani, Teresa Campos, Cathy Clerbaux   +12 more
wiley   +1 more source

Infrared Astronomy

This website from NASA's Infrared Astrophysics Data Center describes: the discovery of infrared waves; what infrared waves are and how they are used in astronomy; atmospheric windows; near, middle, and far infrared; the infrared universe; and infrared ...
Linda Hermans-Killam
core  

Astronomy at high angular resolution: a compendium of techniques in the visible and near-infrared

, 2016
This book offers an essential compendium of astronomical high-resolution techniques. Recent years have seen considerable developments in such techniques, which are critical to advances in many areas of astronomy.
Schmidtobreick, Linda, Boffin, Henri, Hussain, Gaitee, Berger, Jean-Philippe   +3 more
core   +1 more source

Laboratory Spectral Characterization of Ribbeck Aubrite: Meteorite Sample of Earth-impacting Near-Earth Asteroid 2024 BX1

The Planetary Science Journal
Characterization of near-Earth objects (NEOs) is critical for Earth-impact hazard assessment. Particularly crucial to our physical understanding of NEOs are laboratory spectral measurements of meteorites as they are the best and most widely available ...
David C. Cantillo, Kaycee I. Ridenhour, Adam Battle, Thomas Joyce, Juliana Nunez Breceda, Neil Pearson, Vishnu Reddy   +6 more
doaj   +1 more source

Luminescence and Photochromism in Lanthanide‐Doped Hackmanites

Advanced Optical Materials, Volume 14, Issue 23, 19 June 2026.
Lanthanide‐doped lithium hackmanite derivatives are prepared utilizing a doped LiAlSiO4 precursor to modify luminescent and photochromic properties. Upon UV excitation, europium doping results in green Eu2+ persistent luminescence from shallow traps. Contrarily, samarium doping induces unusual near‐infrared photochromism.
Joshua Baggott, Minnea Tuomisto, J. A. Gareth Williams, Sari Granroth, Ermei Mäkilä, Ari Väisänen, Jani O. Moilanen, Mika Lastusaari   +7 more
wiley   +1 more source

Broadband Reflective Terahertz Quarter‐Wave Metasurface Enabled by Two‐Photon Polymerization 3D‐Printing

Advanced Photonics Research, Volume 7, Issue 6, June 2026.
A compact reflective terahertz quarter‐wave metasurface fabricated via 2PP‐3D printing method is experimentally demonstrated near 1 THz frequency. Broadband linear‐to‐circular polarization conversion is achieved over 0.75–1.30 THz (∼54% fractional bandwidth), with axial ratio below 3 dB and ellipticity approaching −1.
Anjali Chaudhary, Anju Sajan, Rohit Chikkaraddy, Sunil Kumar, Ravendra Kumar Varshney, Miguel Navarro‐Cía   +5 more
wiley   +1 more source