Results 41 to 50 of about 8,766 (125)

Structural and compositional properties of brown dwarf disks: the case of 2MASS J04442713+2512164 [PDF]

, 2008
In order to improve our understanding of substellar formation, we have performed a compositional and structural study of a brown dwarf disk. We present the result of photometric, spectroscopic and imaging observations of 2MASS J04442713+2512164, a ...
A. Bayo, Alencar, Apai, Appenzeller, B. Lefort, Baraffe, Barrado y Navascués, Basri, Bockelée-Morvan, Bouwman, C. Pinte, Cabrit, Calvet, Chiang, Ciesla, Comerón, D. Barrado y Navascués, Devillard, Dorschner, Dullemond, E. L. Martín, E. Pantin, F. Marchis, F. Ménard, Fernández, Fernández, G. Basri, G. Duchêne, G. Duvert, Gail, Garcia Lopez, Guieu, H. Bouy, Harker, Harker, Hartmann, Houck, J. Olofsson, J.-C. Augereau, J.-L. Monin, Kaito, Keller, Keller, Kemper, Kessler-Silacci, Kessler-Silacci, Knapp, Lagage, Lay, Luhman, Luhman, Luhman, Martín, Meeus, Merín, Mohanty, Molster, Muzerolle, Muzerolle, Muzerolle, N. Huélamo, Natta, Nuth, Ochsenbein, Pantin, Pinte, Pinte, S. Bottinelli, S. Guieu, Sargent, Scholz, Tozzi, van Boekel, van Boekel, Vogt, Walker, Whelan, White   +77 more
core   +4 more sources

Geomagnetic Excursions Recorded in North Atlantic IODP Expedition 395C Sites U1555 and U1563

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 6, June 2025.
Abstract By studying deep‐sea drilled records from the North Atlantic Ocean, several magnetic instabilities of short duration, such as the Iceland Basin (188 ka), the Björn (1,255 ka) and the Gardar (1,460 ka) excursions, were discovered. These records have contributed to our understanding of Earth's magnetic field and are the foundation of the ...
Anita Di Chiara, Sara Satolli, Sarah A. Friedman, Deepa Dwyer, Gary D. Acton, Tom Dunkley Jones, Boris Theofanis Karatsolis, Paul N. Pearson, Takuma Suzuki, Sevasti Modestou, Suzanne O'Connell, Halima Ibrahim, Claire E. Jasper, Danielle E. LeBlanc, Saran Lee‐Takeda, Thena Thulasi, Deborah E. Eason, Matthias Sinnesael, Katharina Hochmuth, Anne Briais, Ross Parnell‐Turner, Leah J. LeVay, Expedition 395C/395 Science Party   +22 more
wiley   +1 more source

Mineral reconnaissance at the Highland boundary with special reference to the Loch Lomond and Aberfoyle areas [PDF]

, 1983
Serpentinite bodies at the Highland Boundary in the Loch Lomond and Aberfoyle areas are extensively altered to magnesite-quartz and ferroan-dolomite-quartz rocks. Silicification was probably initiated before conversion to carbonate.
Fortey, N.J., Grout, A., Henderson, W.G., Johnson, C.E.   +3 more
core  

Properties of Protostars in the Elephant Trunk in the Globule IC 1396A [PDF]

, 2009
Extremely red objects, identified in the early Spitzer Space Telescope observations of the bright-rimmed globule IC 1396A and photometrically classified as Class I protostars and Class II T Tauri stars based on their mid-infrared (mid-IR) colors, were ...
Boogert, Adwin, Cambrésy, Laurent, Faied, Dohy, Jarrett, Thomas H., Morris, Patrick, Palla, Francesco, Reach, William T., Rho, Jeonghee, Tappe, Achim, Valdettaro, Riccardo   +9 more
core  

Developing a Lagrangian Frame Transformation on Satellite Data to Study Cloud Microphysical Transitions in Arctic Marine Cold Air Outbreaks

Geophysical Research Letters, Volume 52, Issue 9, 16 May 2025.
Abstract Arctic marine cold air outbreaks (CAOs) generate distinct and dynamic cloud regimes due to intense air‐sea interactions. To understand the temporal evolution of CAO cloud properties and compare different CAO events, a Lagrangian perspective is particularly useful.
Hannah Seppala, Zhibo Zhang, Xue Zheng
wiley   +1 more source

Enhancing Surface PM2.5 Air Quality Estimates in GEOS Using CATS Lidar Data

Earth and Space Science, Volume 12, Issue 5, May 2025.
Abstract Spaceborne lidar offers unique advantages for improving global estimates of fine particulate matter (PM2.5 ${\text{PM}}_{2.5}$), traditionally limited by critical data gaps in the vertical dimension. Here, we present a new method to retrieve PM2.5 ${\text{PM}}_{2.5}$ relying on ensembles on aerosol extinction available within the GEOS Aerosol ...
Alexander V. Matus, Edward P. Nowottnick, John E. Yorks, Arlindo M. da Silva   +3 more
wiley   +1 more source

Explosion of Comet 17P/Holmes as revealed by the Spitzer Space Telescope

, 2010
An explosion on comet 17P/Holmes occurred on 2007 Oct 23, projecting particulate debris of a wide range of sizes into the interplanetary medium. We observed the comet using the Spitzer spectrograph on 2007 Nov 10 and 2008 Feb 27, and the photometer, on ...
Altenhoff, Bar-Nun, Barnard, Belton, Belton, Carey M. Lisse, Chen, Cochran, Crifo, Dello Russo, Dorschner, Ghormley, Ghormley, Holsapple, Hsieh, Hsieh, Jenniskens, Jenniskens, Jeonghee Rho, Jeremie Vaubaillon, Jewitt, Jäger, Kiss, Korycansky, Lamy, Lebofsky, Leinhardt, Lin, Lisse, Makovoz, Makovoz, McCarthy, McMillan, Meech, Mikel Holloway, Montalto, Moreno, Prialnik, Prialnik, Reach, Reach, Schleicher, Sekanina, Smith, Snodgrass, Starck, Vaubaillon, Weissman, William T. Reach, Yang   +49 more
core   +3 more sources

On the spectral depolarisation and lidar ratio of mineral dust provided in the AERONET version 3 inversion product [PDF]

, 2018
Knowledge of the particle lidar ratio (Sγ) and the particle linear depolarisation ratio (δγ) for different aerosol types allows for aerosol typing and aerosol-Type separation in lidar measurements.
Kezoudi, Maria, Kim, Kwanchul, Mueller, Detlef, Noh, Youngmin, Shin, Sung-Kyun, Tatarov, Boyan, Tesche, Matthias   +6 more
core   +2 more sources

B‐Type Olivine Fabrics Within the Cumulate Buck Creek Ultramafic Body Emplaced During Southern Appalachian Taconic Subduction

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 5, May 2025.
Abstract The Buck Creek ultramafic complex is a fragment of oceanic cumulate emplaced into the lower Laurentian continental crust during Ordovician Taconic subduction. We document olivine fabrics in the relatively pristine dunites preserved from peak metamorphic conditions of ∼850°C and 1.0–1.4 GPa confining pressure.
Virginia L. Peterson, Jeffrey M. Rahl, Samuel DeYoung, Davis Eyth, Madeline Mennenga, Benjamin A. Pummell   +5 more
wiley   +1 more source

Demise of the Barra Honda Carbonate Shoal (Costa Rica) at the Paleocene‐Eocene Boundary Linked to Climate Change and Forearc Tectonics

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 5, May 2025.
Abstract The latest Cretaceous(?)–Paleocene Barra Honda Formation represents one of the largest carbonate shoals (>900 km2, 350 m thick) of the convergent margin of Costa Rica. Although the mode of formation of the carbonate shoal is well understood, how environmental and tectonic factors interacted to cause its demise near the Paleocene‐Eocene ...
Goran Andjić, Claudia Baumgartner‐Mora, Peter O. Baumgartner, Maria Rose Petrizzo, Torsten Vennemann, André N. Paul, Valentin Lorenzo   +6 more
wiley   +1 more source