Results 61 to 70 of about 694,028 (301)

Abundance Anomalies in Red Giants [PDF]

EPJ Web of Conferences
The stellar theory is well developed to explain most of the inner workings of stars; however, researchers occasionally come across things that won’t comply with the general understanding.
Reddy Bacham Eswar
doaj   +1 more source

Spatially Regulated Lithium Plating via Li2O‐Rich Interphase Enables Durable Fast‐Charging Hybrid Lithium Batteries

Advanced Functional Materials, EarlyView.
A Li2O‐rich solid electrolyte interphase (SEI) is engineered on graphite through a propylene carbonate‐based electrolyte to spatially regulate Li plating. The homogeneous interphase lowers Li nucleation barriers, promotes conformal Li deposition around graphite particles, and suppresses dendritic accumulation, enabling durable hybrid Li‐ion/Li‐metal ...
Robert Kuphal, Jingjing Liu, Junxiang Liu, Tao Ma, Yi Ding, Mahmood Haq, Satish Udpa, Stephen J. Harris, Chengcheng Fang   +8 more
wiley   +1 more source

Lithium abundances in exoplanet-host stars

, 2007
International audienceExoplanet-host stars (EHS) are known to present surface chemical abundances different from those of stars without any detected planet (NEHS). EHS are, on the average, overmetallic compared to the Sun. The observations also show that,
Vauclair, S., Richard, O., Castro, M., Santos, N. C.   +3 more
core   +2 more sources

Ages of Stars and Planets in the Kepler Field Younger than Four Billion Years

The Astrophysical Journal
Recent analyses of FGK stars in open clusters have helped clarify the precision with which a star’s rotation rate and lithium content can be used as empirical indicators for its age. Here we apply this knowledge to stars observed by Kepler.
Luke G. Bouma, Lynne A. Hillenbrand, Andrew W. Howard, Howard Isaacson, Kento Masuda, Elsa K. Palumbo   +5 more
doaj   +1 more source

Disentangling Bulk and Surface Contributions to Charge and Discharge Fading in High‐Voltage LiCoO2

Advanced Functional Materials, EarlyView.
High‐voltage operation of LiCoO2 accelerates capacity fading through bulk and surface degradation. By introducing a LiTaO3 coating to selectively suppress surface degradation, bulk and surface contributions to charge and discharge fading are decoupled.
Hyungjoon Moon, Sangbin Park, Jaewoo Jung, Seongeun Lee, Chanwoo Jung, Min‐Sik Park, Won‐Sub Yoon   +6 more
wiley   +1 more source

Apache Point Observatory Follow-up of ACcelerating Candidate ExopLanet Host Stars (APO ACCELS): Ages for 166 Accelerating Stars in the Northern Hemisphere

The Astronomical Journal
Directly imaged substellar companions with well-constrained ages and masses serve as vital empirical benchmarks for planet formation and evolution models. Potential benchmark companions can be identified from astrometric accelerations of their host stars.
Anne E. Peck, Eric L. Nielsen, Robert J. De Rosa, William Thompson, Bruce Macintosh, William Roberson, Adam J. R. W. Smith, Jessica Klusmeyer, Asif Abbas, Jason Jackiewicz, Jon Holtzman, Hannah Gallamore, Marah Brinjikji, Jennifer Patience, Jayke S. Nguyen, Alex Madurowicz, Dmitry Savransky   +16 more
doaj   +1 more source

Cool, Luminous, and Highly Variable Stars in the Magellanic Clouds. II. Spectroscopic and Environmental Analysis of Thorne–Żytkow Object and Super-AGB Star Candidates

The Astrophysical Journal, 2023
In previous work, we identified a population of 38 cool and luminous variable stars in the Magellanic Clouds and examined 11 in detail in order to classify them as either Thorne–Żytkow objects (TŻOs; red supergiants with a neutron star cores) or super ...
Anna J. G. O‘Grady, Maria R. Drout, B. M. Gaensler, C. S. Kochanek, Kathryn F. Neugent, Carolyn L. Doherty, Joshua S. Speagle, B. J. Shappee, Michael Rauch, Ylva Götberg, Bethany Ludwig, Todd A. Thompson   +11 more
doaj   +1 more source

Dynamically Actuated Reconfigurable Topographical Surface Enables Active Control of Implant‐Associated Infections

Advanced Functional Materials, EarlyView.
A dynamically actuated reconfigurable topographical surface (DARTS) integrates contact‐mediated bactericidal nanotopography with programmable mechanical actuation to actively disrupt bacterial biofilms. Dynamic surface reconfiguration enhances bacterial killing and suppresses implant‐associated infections in vivo, providing a new strategy for active ...
Mohammad Asadi Tokmedash, Jihun Lee, J. Scott VanEpps, Sungmin Nam, Jouha Min   +4 more
wiley   +1 more source

Lithium and Lithium Depletion in Halo Stars on Extreme Orbits [PDF]

The Astrophysical Journal, 2005
29 pages including 3 tables and 12 figures Accepted by The Astrophysical Journal, for the 1 November 2005 issue, v ...
Boesgaard, Ann Merchant, Stephens, Alex, Deliyannis, Constantine P.   +2 more
openaire   +2 more sources

Emerging Post‐CMOS Hardware Neurons for Brain‐Inspired Computing: Devices, Circuits, and System Integration

Advanced Functional Materials, EarlyView.
The physical realization of artificial neurons is a critical challenge for energy‐efficient neuromorphic computing. This review presents a comprehensive analysis of the evolution of artificial neuron implementations from conventional CMOS to emerging post‐CMOS technologies.
Kannan Udaya Mohanan, Hocheon Yoo, Benoît H. Lessard, Ioannis Kymissis, Chang‐Hyun Kim   +4 more
wiley   +1 more source