Results 41 to 50 of about 2,349 (186)

The Blanco DECam Bulge Survey (BDBS) VIII: Chemo-kinematics in the southern Galactic bulge from 2.3 million red clump stars with Gaia DR3 proper motions [PDF]

, 2023
Tommaso Marchetti, Meridith Joyce, Christian I. Johnson, R. Michael Rich, W. I. Clarkson, Andrea Kunder, Iulia T. Simion, C. A. Pilachowski   +7 more
openalex   +1 more source

Provenance Reassessment of Eocene Turbidites, New Caledonia: Inferences for Obduction Models

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract Provenance of pre‐obduction Eocene turbidites from New Caledonia is used to better constrain their geodynamic context and inform debate on subduction polarity. Chemical compositions of detrital clinopyroxenes in arenites are compared against potential sources.
Dominique Cluzel, France Pattier, Renjie Zhou, Sébastien Meffre, Jonathan C. Aitchison, Pierre Maurizot, Maximilien Mathian, Jean‐Luc Devidal   +7 more
wiley   +1 more source

The Microlensing Event Rate and Optical Depth from MOA-II 9 Yr Survey Toward the Galactic Bulge

The Astrophysical Journal
We present measurements of the microlensing optical depth and event rate toward the Galactic bulge using the data set from the 2006 to 2014 MOA-II survey, which covers 22 bulge fields spanning ∼42 deg ^2 between −5° 
Kansuke Nunota, Takahiro Sumi, Naoki Koshimoto, Nicholas J. Rattenbury, Fumio Abe, Richard Barry, David P. Bennett, Aparna Bhattacharya, Akihiko Fukui, Ryusei Hamada, Shunya Hamada, Naoto Hamasaki, Yuki Hirao, Stela Ishitani Silva, Yoshitaka Itow, Yutaka Matsubara, Shota Miyazaki, Yasushi Muraki, Tsutsumi Nagai, Greg Olmschenk, Clement Ranc, Yuki K. Satoh, Daisuke Suzuki, Paul. J. Tristram, Aikaterini Vandorou, Hibiki Yama, (MOA collaboration)   +26 more
doaj   +1 more source

Thermal Reactions of Smectite Minerals at Earthquake Timescales

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract Frictional heating causes a transient temperature rise in fault zones during earthquakes that leads to metamorphic reactions within the fault rocks. The products of these reactions provide potential evidence of earthquakes in both the outcrop and drill core. Clay minerals such as smectites are commonly found in faults.
Julia E. Krogh, Heather M. Savage, Randolph T. Williams, Pratigya J. Polissar, Christie D. Rowe   +4 more
wiley   +1 more source

MHD Simulation in Galactic Center Region with Radiative Cooling and Heating

The Astrophysical Journal
We investigate the role of magnetic field on the gas dynamics in a galactic bulge region by three-dimensional simulations with radiative cooling and heating.
Kensuke Kakiuchi, Takeru. K. Suzuki, Shu-ichiro Inutsuka, Tsuyoshi Inoue, Jiro Shimoda   +4 more
doaj   +1 more source

Origin of the King's Trough Complex (North Atlantic): Interplay Between a Transient Plate Boundary and the Early Azores Mantle Plume

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract The King's Trough cuts into an area of thickened oceanic crust associated with the 45°N melting anomaly at the Mid‐Atlantic Ridge. Here we present a comprehensive geochemical data set and new 40Ar/39Ar age and bathymetric data from magmatic rocks from the King's Trough and the smaller Peake and Freen Deeps to the east and from the Gnitsevich ...
A. Dürkefälden, J. Geldmacher, F. Hauff, M. Stipp, D. Garbe‐Schönberg, D. A. Frick, B. Jicha, L. Pinto Ribeiro, M. Gutjahr, J. Schenk, K. Hoernle   +10 more
wiley   +1 more source

OGLE-2014-BLG-1760: A Jupiter–Sun Analogue Residing in the Galactic Bulge

The Astronomical Journal
We present the analysis of OGLE-2014-BLG-1760, a planetary system in the galactic bulge. We combine Keck Adaptive Optics follow-up observations in K -band with re-reduced light-curve data to confirm the source and lens star identifications and stellar ...
Natalia E. Rektsini, Clément Ranc, Naoki Koshimoto, Jean-Philippe Beaulieu, David P. Bennett, Andrew A. Cole, Sean K. Terry, Aparna Bhattacharya, Étienne Bachelet, Ian A. Bond, Andrzej Udalski, Joshua W. Blackman, Aikaterini Vandorou, Thomas J. Plunkett, Jean-Baptiste Marquette   +14 more
doaj   +1 more source

Classification of OGLE Variables in Galactic Bulge [PDF]

Journal of Astronomy and Space Sciences, 1997
The miscellaneous variables observed by OGLE Project of searching for dark matter in our Galaxy have been analyzed to find their characteristics. We investigated evolutionary status, shape of light curve, relationship between orbital period and amplitude
Young Woon Kang
doaj  

Estimating Finite Source Effects in Microlensing Events due to Free-Floating Planets with the Euclid Survey

Advances in Astronomy, 2015
In recent years free-floating planets (FFPs) have drawn a great interest among astrophysicists. Gravitational microlensing is a unique and exclusive method for their investigation which may allow obtaining precious information about their mass and ...
Lindita Hamolli, Mimoza Hafizi, Francesco De Paolis, Achille A. Nucita   +3 more
doaj   +1 more source

Viscosity‐Driven Dynamics of the Midnight Temperature Maximum in the Low‐Latitude Thermosphere

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract This paper investigates the impact of viscosity on the dynamics of the Midnight Temperature Maximum (MTM) in the low‐latitude thermosphere. Our study utilizes simulations to examine how varying levels of viscosity influence neutral temperature patterns and horizontal wind behaviors, which, in turn, drive the MTM characterized by peak neutral ...
Onyinye G. Nwankwo, Aaron J. Ridley
wiley   +1 more source