Results 71 to 80 of about 681,612 (216)

Combustion and Pyrolysis EA‐IRMS Techniques to Determine the δ2H of Diamonds

Rapid Communications in Mass Spectrometry, Volume 40, Issue 10, 30 May 2026.
ABSTRACT Rationale Diamonds are generally considered to be metasomatic minerals originating from the Earth's mantle. They formed through the interaction of carbon‐bearing fluids or melts with the surrounding deep lithology. Most knowledge about the formation of diamonds comes from studying their mineral inclusions or stable isotopes.
François Fourel, Christophe Lécuyer, Emilie Thomassot, Etienne Deloule, Charles Ojeimi   +4 more
wiley   +1 more source

Gas Sources from the Coma and Nucleus of Comet 46P/Wirtanen Observed Using ALMA

The Astrophysical Journal, 2023
Gas-phase molecules in cometary atmospheres (comae) originate primarily from (1) outgassing by the nucleus, (2) sublimation of icy grains in the near-nucleus coma, and (3) coma (photo)chemical processes.
M. A. Cordiner, N. X. Roth, S. N. Milam, G. L. Villanueva, D. Bockelée-Morvan, A. J. Remijan, S. B. Charnley, N. Biver, D. C. Lis, C. Qi, B. P. Bonev, J. Crovisier, J. Boissier   +12 more
doaj   +1 more source

Visible‐Shortwave Infrared (VSWIR) Spectral Parameters for the Lunar Trailblazer High‐Resolution Volatiles and Minerals Moon Mapper (HVM3)

Earth and Space Science, Volume 13, Issue 3, March 2026.
Abstract The Lunar Trailblazer smallsat mission High‐resolution Volatiles and Minerals Moon Mapper (HVM3) science instrument was designed to acquire targeted spectral image cubes of the lunar surface at visible to shortwave infrared (VSWIR) wavelengths (0.6–3.6 μm) in an effort to understand the distribution, abundance, and form (OH, H2O, ice) of lunar
Angela M. Dapremont, Rachel L. Klima, Kierra A. Wilk, Bethany L. Ehlmann, Christopher S. Edwards, Kerri L. Donaldson Hanna, Valeriya Kachmar, Laura Lee, Jasper K. Miura, Carlé M. Pieters, Erin Pimentel, Katherine A. Shirley, David R. Thompson, Isabelle Adamczewski   +13 more
wiley   +1 more source

Assessing Potential Landing Sites With Favorable Illumination and Accessible, Potentially Volatile‐Rich Permanently Shadowed Regions Within Artemis Candidate Landing Regions

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract The lunar south pole features permanently shadowed regions (PSRs) that never receive direct sunlight. These regions maintain cold temperatures that potentially trap and accumulate volatiles over geologic timescales. Within NASA's Artemis candidate landing regions, we identified 130 candidate landing sites (CLSs) that satisfy the Human Landing ...
Lukas Wueller, Lauren M. Berger, Hephzibah Christopher, Kanori Sugimoto, Ashka D. Thaker, Louis Carton, William Jo, Seungil Lee, Riccardo Pedrelli, Pedro Sanchez, David A. Kring   +10 more
wiley   +1 more source

Cold Deuterium Fractionation in the Nearest Planet-forming Disk

The Astrophysical Journal, 2023
Deuterium fractionation provides a window into the thermal history of volatiles in the solar system and protoplanetary disks. While evidence of active molecular deuteration has been observed toward a handful of disks, it remains unclear whether this ...
Carlos E. Romero-Mirza, Karin I. Öberg, Charles J. Law, Richard Teague, Yuri Aikawa, Jennifer B. Bergner, David J. Wilner, Jane Huang, Viviana V. Guzmán, L. Ilsedore Cleeves   +9 more
doaj   +1 more source

Exposures in Indoor Air Affecting Health

Allergy, Volume 81, Issue 3, Page 700-719, March 2026.
ABSTRACT Indoor air quality (IAQ) is influenced by a wide range of chemical, biological and physical agents that can negatively impact physical, immunological and mental health. Adverse health effects depend on the type and concentration of pollutants, duration of exposure, and individual susceptibility.
Maria Hartiala, Varpu Elenius, Alicia Aguado Pesquera, Silas Androulakis, Isabella Annesi‐Maesano, Artur Badyda, Sicco Brandsma, Ioanna Chatziprodromidou, Goran Gajski, Judith Garcia‐Aymerich, Chiara Giorio, Timo Hugg, Jouni J. K. Jaakkola, Sarah Koch, Pim E. G. Leonards, Angeliki Matrali, Lisa Melymuk, Natalie Mueller, Adam Muszyński, Jet Opbroek, Inês Paciência, Spyros N. Pandis, Sofya Pozdniakova, Aino K. Rantala, Sandra Rodríguez Sufuentes, Linda Schenk, Eva Sugeng, Adrià Sunyer‐Caldú, Apostolos Vantarakis, Alexander Zherebker, Ernesto Alfaro‐Moreno, Pernilla Bohlin Nizzetto, José Fermoso Dominguez, Stylianos Karatzas, Francesco Mureddu, Heidi Salonen, Nikolaos Papadopoulos, Tuomas Jartti, the IDEAL Consortium   +38 more
wiley   +1 more source

Evidence for depletion of heavy silicon isotopes at comet 67P/Churyumov-Gerasimenko [PDF]

, 2017
Context. The Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) was designed to measure the composition of the gas in the coma of comet 67P/Churyumov-Gerasimenko, the target of the European Space Agency's Rosetta mission.
M. Rubin, K. Altwegg, H. Balsiger, J. Berthelier, A. Bieler, U. Calmonte, M. Combi, J. Keyser, C. Engrand, B. Fiethe, S. Fuselier, S. Gasc, T. Gombosi, K. Hansen, M. Hassig, L. L. Roy, K. Mezger, C. Tzou, S. Wampfler, P. Wurz   +19 more
semanticscholar   +1 more source

The Volatile Composition of Comet 17P/Holmes after Its Extraordinary Outburst

The Astrophysical Journal, 2008
The volatile abundances in comet 17P/Holmes were measured on three dates (UT 2007 October 27.6 and 31.3 and November 2.3) using high-dispersion (λ/Δ λ ~ 2.5 × 104) infrared spectroscopy with NIRSPEC at the W. M. Keck Observatory and CSHELL at the NASA Infrared Telescope Facility.
Russo, N. Dello, Vervack, R. J., Jr., Weaver, H. A., Montgomery, M. M., Deshpande, R., Fernández, Y. R., Martin, E. L.   +6 more
openaire   +3 more sources

Cryogenic Differential Calorimetry: Exothermicity of Amorphous-to-crystalline Phase Transitions (ACPT) in Astrophysical and Cometary Ice Analogs

The Astrophysical Journal
Amorphous ice is understood to be the predominant phase of water in cometary nuclei. A significant number of other volatiles can be trapped in amorphous H _2 O ice and released during the amorphous-to-crystalline phase transition (ACPT).
Rahul K. Kushwaha, Murthy S. Gudipati, Bryana L. Henderson   +2 more
doaj   +1 more source

The Challenge of Icy Sample Return Begins With Artemis

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract Throughout the Solar System, volatiles are found as solid ices. Returning ices to Earth for scientific analysis is critical to understanding the formation of a Solar System that bears life. This challenge begins with the Artemis missions to the lunar south polar region, where the coldest lunar regolith is enriched in H2O and other ices—systems
D. L. Gilbertson, J. W. Boyce, A. D. Bravenec, M. C. Huh, F. M. McCubbin, E. K. Lewis, J. Gross, J. Davidson   +7 more
wiley   +1 more source