Results 51 to 60 of about 8,766 (125)

Melt‐Supported Strain Localization at Eclogite‐Facies Conditions Triggered by Syn‐Metamorphic Strength Inversion

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 5, May 2025.
Abstract In convergent high‐pressure settings dominated by dry mafic rocks, strain has been proposed to be predominantly localized in eclogite. However, the processes initiating strain localization, accommodating strain and rheological consequences remain to be identified.
Anna Rogowitz, Simon Schorn, Benjamin Huet, Bernhard Grasemann, Luca Menegon   +4 more
wiley   +1 more source

Origins and Alteration of Ediacaran Carbonates Recording the Shuram Excursion in Oman

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 5, May 2025.
Abstract The Shuram excursion is the largest known negative carbon isotope excursion in Earth's history. Recognized globally, it follows the Ediacaran Gaskiers glaciation and precedes a marked increase in the diversity and complexity of the earliest macroscopic multicellular organisms in the fossil record.
Kristin D. Bergmann, Magdalena R. Osburn, Noah T. Anderson, Claire Hayhow, Julia Wilcots, Marjorie D. Cantine, Woodward W. Fischer, Magali Bonifacie   +7 more
wiley   +1 more source

Crystalline Silicate Emission in the Protostellar Binary Serpens--SVS20

, 2005
We present spatially resolved mid-infrared spectroscopy of the class I/flat-spectrum protostellar binary system SVS20 in the Serpens cloud core. The spectra were obtained with the mid-infrared instrument T-ReCS on Gemini-South.
Casali M. M., Charles M. Telesco, Chris J. Phillips, Christopher Packham, Cynthia Gomez Martin, David E. Harker, David R. Ciardi, Dorschner J., Eiroa C., Eiroa C., Huard T. L., James M. De Buizer, James T. Radomski, Straizys V.   +13 more
core   +1 more source

The dust envelope of the pre-planetary nebula IRAS19475+3119

, 2006
We present the spectral energy distribution (SED) of the pre-planetary nebula, IRAS 19475+3119 (I19475), from the optical to the far-infrared. We identify emission features due to crystalline silicates in the ISO SWS spectra of the star.
Blocker T., Clegg P. E., de Graauw T., Ferrarotti A., Garcia-Laro P., Geetanjali Sarkar, Likkel L., Loup C., Omont A., Ossenkopf V., Parthasarathy M., Pegourie B., Raghvendra Sahai, Reed C., Smith R. G., Swinyard B. M., Waters L. B. F. M.   +16 more
core   +2 more sources

Very Low-Mass Objects in the Coronet Cluster: The Realm of the Transition Disks

, 2008
We present optical and IR spectra of a set of low-mass stars and brown dwarfs in the Coronet cluster (aged ~1Myr), obtained with the multifiber spectrograph FLAMES/VLT and IRS/Spitzer.
Attila Juhász, Audrey Garmire, Aurora Sicilia‐Aguilar, Bessell M. S., Cambresy L., De Geus E. J., De Muizon M., Dorschner J., Gordon Garmire, Henning Th., Henning Th., Henning Th., Henning Th., Hillenbrand L. A., Jager C., Jayawardhana R., Jeroen Bouwman, Knude J., Natta A., Neuhauser R., Pascucci I., Preibisch T., Taylor K. N. R., Thomas Henning   +23 more
core   +1 more source

Transient dust in warm debris disks - Detection of Fe-rich olivine grains

, 2012
(Abridged) Debris disks trace remnant reservoirs of leftover planetesimals in planetary systems. A handful of "warm" debris disks have been discovered in the last years, where emission in excess starts in the mid-infrared.
A. Juhász, A. Moór, A. Tamanai, Aumann, Begemann, Beichman, Beichman, Bouwman, Bouwman, Bradley, Brunetto, Bryden, Burns, Carpenter, Charbonneau, Chen, Chen, Chen, Davison, Dohnanyi, Dorschner, Egan, Fabian, Fujiwara, Furlan, Gail, Gorlova, H. Mutschke, Henning, Henning, Henning, J. Olofsson, Juhasz, Juhász, Jäger, Jäger, Jäger, Keil, Kemper, Kitamura, Koerner, Koike, Koike, Krivov, Lebreton, Liseau, Lisse, Lisse, Lisse, Lisse, Lovis, Low, Löhne, Matranga, Melis, Min, Min, Moskovitz, Moór, Murata, Mutschke, Nakamura, Naylor, Nguyen, Nuth, Oliveira, Olofsson, Olofsson, Ossenkopf, P. Ábrahám, Prato, Qin, Sargent, Sargent, Scherstén, Smith, Smith, Soderblom, Sogawa, Sprague, Tamanai, Tamanai, Th. Henning, Thompson, Verrier, Voshchinnikov, Weinberger, Weinberger, Wogelius, Wolf, Wooden, Wooden, Wooden, Wyatt, Wyatt, Zeidler, Zolensky, Zolensky, Zuckerman, Ábrahám   +99 more
core   +1 more source

X-Ray Absorption and Scattering by Interstellar Grains

, 2016
Interstellar abundance determinations from fits to X-ray absorption edges often rely on the incorrect assumption that scattering is insignificant and can be ignored.
Draine, Bruce T., Hoffman, John A.
core   +1 more source

Compositional characterisation of the Themis family

, 2015
Context. It has recently been proposed that the surface composition of icy main-belt asteroids (B-,C-,Cb-,Cg-,P-,and D-types) may be consistent with that of chondritic porous interplanetary dust particles (CPIDPs). Aims.
Binzel, R. P., Birlan, M., DeMeo, F., Dumas, C., Marsset, M., Milli, J., Popescu, M., Vernazza, P.   +7 more
core   +3 more sources

The Cosmic Crystallinity Conundrum: Clues from IRAS 17495-2534

, 2008
Since their discovery, cosmic crystalline silicates have presented several challenges to understanding dust formation and evolution. The mid-infrared spectrum of IRAS 17495$-$2534, a highly obscured oxygen-rich asymptotic giant branch (AGB) star, is the ...
Alan G. Whittington, Angela K. Speck, Blommaert, Crovisier, de Graauw, Dijkstra, Dijkstra, Gail, Ivezić, Josh B. Tartar, Jäger, Jäger, Kemper, Lewis, Lodders, Lodders, Loup, Ossenkopf, Rietmeijer, Sogawa, Spoon, Sylvester, Tamanai, Tielens, Tsukamoto, Vanhollebeke, Waelkens, Waters, Wilding   +28 more
core   +1 more source

Flaring and self-shadowed disks around Herbig Ae stars: simulations for 10 micron interferometers

, 2005
We present simulations of the interferometric visibilities of Herbig Ae star disks. We investigate whether interferometric measurements in the 10 micrometer atmospheric window are sensitive to the presence of an increased scale height at the inner disk ...
Dominik, C., Dullemond, C. P., van Boekel, R.   +2 more
core   +1 more source