Results 21 to 30 of about 9,240 (133)

“Flames Over Persepolis”: New Scientific Evidence Supporting Historical Perspectives

Archaeometry, EarlyView.
ABSTRACT This study investigates the burning of Persepolis Terrace, historically attributed to Alexander III in 330 bce. A review of classical accounts and excavation reports, combined with diagnostic surveys, confirms the fire's historicity and provides novel insights.
Maria Letizia Amadori, Ileana De Giuseppe, Fabrizio Frontalini, Luca Pellegrino, Richard W. Jordan, Pierfrancesco Callieri, Emad Matin, Alireza Askari Chaverdi, Hamid Fadaei, Valeria Mengacci, Fulvio Fantino   +10 more
wiley   +1 more source

Silica in Protoplanetary Disks

, 2008
Mid-infrared spectra of a few T Tauri stars (TTS) taken with the Infrared Spectrograph (IRS) on board the Spitzer Space Telescope show prominent narrow emission features indicating silica (crystalline silicon dioxide).
A. Li, A. R. Basu, Alexander, Armus, B. A. Sargent, Barkume, Barsony, Benzerara, Binns, Bohren, Bouvier, Bowen, Bowen, Brearley, C. J. Bohac, C. Tayrien, Calvet, Calvet, Chen, Chiar, Cohen, D'Alessio, D'Alessio, D. M. Watson, de Pater, de Zeeuw, Dodd, Dorschner, E. Furlan, Edgar, Emery, Fabian, Furlan, G. C. Sloan, Grün, Hanner, Harker, Harker, Heaney, Hemley, Henning, Herbig, Honda, Houck, J. D. Green, Jaeger, K. H. Kim, Kamp, Kastner, Kemper, Kimura, Klein, Koike, Li, Li, Luhman, Luhman, M. K. McClure, Marshall, Metchev, Mikouchi, Mutschke, Norton, P. Manoj, Palik, Pascucci, Pilipp, Plyusnina, Posch, Prato, Preibisch, Reipurth, Rietmeijer, Rietmeijer, Rietmeijer, Sargent, Schaefer, Silverstone, Tuttle, Uchida, W. J. Forrest, Werner, Wilking   +82 more
core   +1 more source

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

Biometric Analysis of Giant and Large Murid Remains From Matja Kuru 2, Timor‐Leste

Archaeometry, EarlyView.
ABSTRACT Published research on Matja Kuru 2 (MK2) demonstrates its significance for understanding human lifestyle during the terminal Pleistocene and Holocene. Murids represent the most commonly identified taxa in the site, with specimens preliminarily classified as small, large and giant based on size comparisons.
Sarah Hannan, Sofia C. Samper Carro, Sue O'Connor   +2 more
wiley   +1 more source

Integrating rotational components to optical properties observed in petrographic thin sections via automated image acquisition and analysis

Mineralogia
The analysis of petrographic thin sections is a widely used process for the identification of the mineralogy of rocks and the analysis of their textural and microstructural characteristics.
Pretorius Jacob Johannes, Mayne Matthew Jason   +1 more
doaj   +1 more source

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

Search for impact ejecta at the Paleocene–Eocene boundary

Meteoritics &Planetary Science, EarlyView.
Abstract Almost 10 years have passed since microtektites and microkrystites were reported for the Paleocene–Eocene (P–E) boundary in drill cores and outcrop in New Jersey and in ODP Hole 1051B in the western North Atlantic. The glassy spherules were interpreted to reflect an impact trigger for the Paleocene–Eocene Thermal Maximum (PETM).
Birger Schmitz, Yue Cai, Shiyong Liao, Victoriano Pujalte, Ting Ruan, Robert P. Speijer, Ellen Thomas   +6 more
wiley   +1 more source

Confirmation of the impact origin of the Late Ordovician Tvären impact structure (southeast Sweden) and emplacement of impactites in a marine setting

Meteoritics &Planetary Science, EarlyView.
Abstract The Tvären structure in southeastern Sweden has been listed as a confirmed marine‐target impact structure for decades. However, to date, no measurements and/or indexed data of planar deformation features in quartz grains from the structure have been published or any other unequivocal evidence of impact.
Katarzyna J. Gajewska, Sanna Alwmark, Mikael Calner, Sylvain Richoz, Jens Ormö, Erik Sturkell, Carl Alwmark   +6 more
wiley   +1 more source

Spherulite in the modern aragonitic travertine stromatolite has a calcite core with exopolymers

Sedimentology, EarlyView.
ABSTRACT Spherulites are spherical to ellipsoidal particles formed by various crystalline substances and can be abiotically synthesised in the laboratory. Among various spherulite types, spherulites composed of calcium carbonate are also found in various natural environments, but their abiotic or biotic origins are still controversial.
Fumito Shiraishi, Takayuki Akimoto, Naotaka Tomioka, Satoko Motai, Yoshio Takahashi   +4 more
wiley   +1 more source

Sedimentology of silica granules and haematite in the 3.47 Ga Antarctic Creek Member, Mount Ada Basalt, Western Australia

Sedimentology, EarlyView.
ABSTRACT The Paleoarchean Antarctic Creek Member of the Mount Ada Basalt, Eastern Pilbara Terrane, Western Australia, includes beds of jasper and white chert composed of sand‐sized silica granules that often contain or are mixed with silt‐sized particles of haematite.
Donald R. Lowe, Gary R. Byerly
wiley   +1 more source