Results 111 to 120 of about 173,443 (344)
Science, 2011 Astrophysics![Figure][1] CREDIT: NASA/ESA AND THE HUBBLE HERITAGE TEAM A classical spiral galaxy has three stellar components: a central, roughly spherical bulge; a thin disk around this bulge; and a halo. Typically, the bulge resembles an elliptical galaxy.
openaire +2 more sources
Modulating Oxide‐Based Quantum Materials by Ion Implantation
Advanced Functional Materials, EarlyView.This review highlights how ion implantation, a well developed chip‐technology, enables targeted modulation of oxide‐based quantum materials. This includes tuning of metal‐insulator transitions, magnetism, and superconductivity through selective doping, defect creation, and induced lattice strain. Abstract Ion implantation has emerged as a powerful tool
Andreas Herklotz +2 more
wiley +1 more source
The populations of planetary nebulae in the direction of the Galactic bulge
, 2004 We have observed 44 planetary nebulae (PNe) in the direction of the Galactic bulge, and merged our data with published ones. We have distinguished, in the merged sample of 164 PNe, those PNe most likely to prtain physically to the Galactic bulge and ...
A. V. Escudero +46 more
core +2 more sources
10 Years Development of Potassium‐Ion Batteries
Advanced Materials, EarlyView.Significant progress is made in PIBs over the past decade, but the improvements based on half‐cell testing, low mass loading, and low energy density are insufficient for practical applications. This review summarizes the challenges and strategies for PIBs, highlights the importance of further research focusing on full cells, and provides an analysis of
Mingnan Li +7 more
wiley +1 more source
The Astrophysical JournalWe present an analysis of the structure, kinematics, and chemo-dynamical properties of the Milky Way bulge using RR Lyrae stars from Optical Gravitational Lensing Experiment (OGLE), and giant stars from APOGEE and Gaia that have distances placing them in
Xiao Han +7 more
doaj +1 more source
Unifying the planar bar and the boxy bulge of the Milky Way
EPJ Web of Conferences, 2012 For some time the Milky Way has been understood as a barred disk galaxy. Star count observations have provided evidence for two bars at apparently different orientations, the boxy bulge and a long planar bar.
Martinez-Valpuesta I., Gerhard O.
doaj +1 more source
Pseudo bulges in galaxy groups: the role of environment in secular evolution [PDF]
, 2017 We examine the dependence of the fraction of galaxies containing pseudo bulges on environment for a flux limited sample of $\sim$5000 SDSS galaxies. We have separated bulges into classical and pseudo bulge categories based on their position on the Kormendy diagram. Pseudo bulges are thought to be formed by internal processes and are a result of secular
arxiv +1 more source
Bulging as a pile imperfection
Alexandria Engineering Journal, 2010 AbstractPiled foundation is a method of overcoming difficulties of founding on soft soils to ensure structural safety by transferring structural load through weak soil to a stiff stratum. Due to piles importance, it is becoming necessary to avoid pile defects. These defects arouse from inadequate ground investigations, construction phases, pile loading
Amr Z. El Wakil, M. Kassim
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Advanced Materials, EarlyView.Mechanochromic hydroxypropyl cellulose (HPC) integrated with microfluidic devices creates scalable, eco‐friendly reflective color displays. We demonstrate mechanochromic displays with 500 µm pixel size and 5Hz switching rates with room for optimisation. The proposed mechanochromic HPC displays are an initial step toward more environmentally responsible
Charles H. Barty‐King +4 more
wiley +1 more source
Abundances in the Galactic bulge: results from planetary nebulae and giant stars
, 2008 Our understanding of the chemical evolution of the Galactic bulge requires the determination of abundances in large samples of giant stars and planetary nebulae (PNe).
Barbuy, B. +3 more
core +2 more sources