Results 71 to 80 of about 35,709 (214)
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.Abstract Widespread mafic magmatism at ca. 1.8–1.7 Ga across fragments of the Columbia supercontinent records a transition in the Earth's supercontinent cycle. The paleogeographic position of the Dunhuang Block in northwestern China within Columbia, and its role in this tectonic reorganization, remain controversial.
Masumeh Sargazi +4 more
wiley +1 more source
Modeling Asteroseismic Yields for the Roman Galactic Bulge Time-domain Survey
The Astrophysical JournalThe Galactic Bulge Time-Domain Survey (GBTDS) of the Roman Space Telescope will take high-cadence data of the Galactic bulge. We investigate the asteroseismic potential of this survey for red giants.
Trevor J. Weiss +12 more
doaj +1 more source
The spheroidal bulge of the Milky Way: Chemodynamically distinct from the inner-thick disc and bar
Astronomy & AstrophysicsStudying the composition and origin of the inner region of our Galaxy—the “Galactic bulge”—is crucial for understanding the formation and evolution of the Milky Way and other galaxies.
Nepal S. +9 more
doaj +1 more source
Blazhko modulation in first-overtone RR Lyrae stars from the OGLE Collection
EPJ Web of Conferences, 2017 We present results of the first comprehensive study of the Blazhko effect in first-overtone RR Lyrae stars from the Galactic bulge based on the Optical Gravitational Lensing Experiment data.
Netzel Henryka +2 more
doaj +1 more source
The Astrophysical Journal Supplement Series, 2023 The Nancy Grace Roman Space Telescope (Roman) is NASA’s next astrophysics flagship mission, expected to launch in late 2026. As one of Roman’s core community science surveys, the Galactic Bulge Time Domain Survey (GBTDS) will collect photometric and ...
Robert F. Wilson +10 more
doaj +1 more source
Abundance Patterns in Stars in the Bulge and Galactic Center
, 2007 We discuss oxygen and iron abundance patterns in K and M red-giant members of the Galactic bulge and in the young and massive M-type stars inhabiting the very center of the Milky Way.
Ballero +9 more
core +1 more source
Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.Abstract Previous analyses of Mercury's tectonic record have arrived at widely varying amounts of global contraction. Contraction also varies spatially, with some regions displaying a near‐zero record of contraction. Here, we investigate the contribution of membrane–flexural strain from lithosphere loading to the tectonic record.
A. Broquet, J. C. Andrews‐Hanna
wiley +1 more source
New Light on Dark Extended Lenses with the Roman Space Telescope
The Astrophysical Journal LettersThe Roman Space Telescope’s Galactic Bulge Time Domain Survey will constitute the most sensitive microlensing survey of the Galactic bulge to date, opening up new opportunities to search for dark matter (DM). Many extensions of the Standard Model predict
William DeRocco +2 more
doaj +1 more source
Elemental abundances in AGB stars and the formation of the Galactic bulge
EPJ Web of Conferences, 2012 We obtained high-resolution near-IR spectra of 45 AGB stars located in the Galactic bulge. The aim of the project is to determine key elemental abundances in these stars to help constrain the formation history of the bulge.
Wood P.R. +6 more
doaj +1 more source
Metallicity of Red Giants in the Galactic Bulge from Near-Infrared Spectroscopy
, 2000 We present K-band spectra of more than 110 M giants in Galactic bulge fields interior to -4 degrees and as close as 0.2 degrees of the Galactic Center. From the equivalent widths of three features in these spectra, EW(Na),EW(Ca), and EW(CO) we calculate [
Andrew W. Stephens +6 more
core +2 more sources