Results 41 to 50 of about 94,613 (301)

Multifunctional Crushing and Piezoresistive Self‐Sensing in Conductive Epoxy/CNT‐Coated Polyetherimide TPMS Lattices

Advanced Engineering Materials, EarlyView.
This study reports lightweight polyetherimide triply periodic minimal surfaces lattices coated with carbon nanotube‐reinforced epoxy that combine mechanical robustness with self‐sensing. The conformal coating enhances stiffness, strength and energy absorption while enabling reliable strain monitoring.
A. Triay, J. Schneider, P. Harrison, S. Kumar   +3 more
wiley   +1 more source

Chemical Links between a Young M-type T Tauri Star and Its Substellar Companion: Spectral Analysis and C/O Measurement of DH Tau A

The Astrophysical Journal
The chemical abundance measurements of host stars and their substellar companions provide a powerful tool to trace the formation mechanism of the planetary systems.
Neda Hejazi, Jerry W. Xuan, David R. Coria, Erica Sawczynec, Ian J. M. Crossfield, Paul I. Cristofari, Zhoujian Zhang, Maleah Rhem   +7 more
doaj   +1 more source

Two new ultracool benchmark systems from WISE+2MASS [PDF]

, 2013
We have used the Two-Micron All-Sky Survey and the Wide-field Infrared Survey Explorer to look for ultracool dwarfs that are part of multiple systems containing main-sequence stars.
Burningham, B., Day-Jones, A. C., Gomes, J. I., Jones, H.R.A., Marocco, F., Pinfield, D.J., van Spaandonk, L., Weights, D., Zhang, Z. H.   +8 more
core   +4 more sources

Integrating ZnO/Ag2O@g‐C3N4‐Based Nanocomposites Into a Carrageenan Matrix to Efficiently Remove Heavy Metals From Water

Advanced Materials Interfaces, EarlyView.
ABSTRACT This research focused on characterizing graphitic carbon nitride (g‐C3N4) nanocomposites incorporated with ZnO and Ag2O nanoparticles, and carrageenan to remove heavy metals. The ZnO/Ag2O@ g‐C3N4 and ZnO/Ag2O/g‐C3N4@Carr nanocomposites demonstrated thermal stability of 97.40% (108.81°C) and 82.80% (188.99°C) for TGA.
Feziwe B. Mamba, Bhekani S. Mbuli, James Ramontja   +2 more
wiley   +1 more source

No Evidence for More Earth-sized Planets in the Habitable Zone of Kepler's M versus FGK Stars

The Astronomical Journal, 2023
Reliable detections of Earth-sized planets in the habitable zone remain elusive in the Kepler sample, even for M dwarfs. The Kepler sample was once thought to contain a considerable number of M-dwarf stars ( T _eff < 4000 K), which hosted enough Earth ...
Galen J. Bergsten, Ilaria Pascucci, Kevin K. Hardegree-Ullman, Rachel B. Fernandes, Jessie L. Christiansen, Gijs D. Mulders   +5 more
doaj   +1 more source

Stellar model chromospheres. XIII - M dwarf stars

The Astrophysical Journal, 1982
Single-component, homogeneous model chromospheres that are consistent with high-resolution profiles of the Ca II K line calibrated in surface flux units for three dMe and 2 dM stars observed at quiescent times are constructed. The models reveal several systematic trends.
M. S. Giampapa, S. P. Worden, J. L. Linsky   +2 more
openaire   +1 more source

M dwarf stars in the light of (future) exoplanet searches

, 2012
We present a brief overview of a splinter session on M dwarf stars as planet hosts that was organized as part of the Cool Stars 17 conference. The session was devoted to reviewing our current knowledge of M dwarf stars and exoplanets in order to prepare ...
Bonfils, X., Gaidos, E., Helling, Ch., Henry, T. J., Hilton, E. J., Lépine, S., Mann, A. W., Rogers, L. A., Rojas-Ayala, B., von Braun, K., Youdin, A.   +10 more
core   +3 more sources

Variables in the Southern Polar Region Evryscope 2016 Dataset [PDF]

, 2019
The regions around the celestial poles offer the ability to find and characterize long-term variables from ground-based observatories. We used multi-year Evryscope data to search for high-amplitude (~5% or greater) variable objects among 160,000 bright ...
Barlow, Brad N., Corbett, Henry T., del Ser, Daniel, Fors, Octavi, Glazier, Amy, Howard, Ward S., Law, Nicholas M., Ratzloff, Jeffrey K., Trifonov, Trifon   +8 more
core   +3 more sources

Pattern Formation in Non‐Equilibrium Architected Materials

Advanced Materials Technologies, EarlyView.
This article demonstrates an artificial mechanical system ‐ a robotic metamaterial ‐ as an accessible and versatile platform within which to explore and prescribe the reaction‐diffusion driven pattern formation hitherto associated with comparatively less accessible and versatile non‐equilibrium biological and chemical systems.
Vinod Ramakrishnan, Michael J. Frazier
wiley   +1 more source

Stellar Atmospheric Parameters for Cool Dwarfs in Gaia Data Release 3

The Astrophysical Journal Supplement Series
We provide a catalog of atmospheric parameters for 1,806,921 cool dwarfs from Gaia Data Release 3 (DR3) that lie within the range covered by LAMOST cool dwarf spectroscopic parameters: 3200 K < T _eff < 4300 K, −0.8 < [M/H] < 0.2 dex, and 4.5 < log g < 5.
Cai-Xia Qu, A-Li Luo, Rui Wang, Hugh R. A. Jones, Bing Du, Xiang-Lei Chen, You-Fen Wang   +6 more
doaj   +1 more source