Results 71 to 80 of about 177,797 (288)

TESS Subgiant and Lower-red-giant Asteroseismology in the Continuous Viewing Zones

The Astrophysical Journal
Asteroseismology, the study of stellar oscillations, and stellar modeling both offer profound insights into the fundamental properties and evolution of stars.
Sophia Grusnis, Jamie Tayar, Diego Godoy-Rivera   +2 more
doaj   +1 more source

RF Magnetron Sputtered Tungsten Disulfide Films: Influence of Target Preparation, Deposition Parameters, and Storage Conditions on Thin Film Stoichiometry

Advanced Materials Interfaces, EarlyView.
Sputtered WS2 films were investigated in terms of their S‐ and O‐concentration depending on deposition power and pre‐sputter time. Chemical and structural investigations were done using EDS, TEM, SEM, AFM, XRD. In general, 20 W films exhibit a wide variation in stoichiometry and structure whereas 80 W films demonstrate a higher S/W ratio than 20 W ...
Theresa Scheler, Pascal Illgner, Thomas Kups, Michaela Blum, Peter Schaaf   +4 more
wiley   +1 more source

Effect of Aerosolization and Drying on the Viability of Pseudomonas syringae Cells

Frontiers in Microbiology, 2018
Airborne dispersal of microorganisms influences their biogeography, gene flow, atmospheric processes, human health and transmission of pathogens that affect humans, plants and animals. The extent of their impact depends essentially on cell-survival rates
Malin Alsved, Malin Alsved, Stine Holm, Stine Holm, Sigurd Christiansen, Mads Smidt, Mads Smidt, Bernadette Rosati, Meilee Ling, Meilee Ling, Thomas Boesen, Kai Finster, Kai Finster, Merete Bilde, Jakob Löndahl, Jakob Löndahl, Tina Šantl-Temkiv, Tina Šantl-Temkiv, Tina Šantl-Temkiv   +18 more
doaj   +1 more source

Theoretical Models of Stellar Activity Cycles

, 2012
We discuss possible mechanisms underlying the observed features of stellar activity cycles, such as multiple periodicities in very active stars, non-cyclic activity observed in moderately active stars, and spatial distribution of stellar magnetic regions.
Işik, Emre
core   +1 more source

MXene‐Coated 3D Printed Horn Antennas for Ku Frequency Band

Advanced Materials Technologies, EarlyView.
An additive manufacturing approach to 3D printing horn antennas and coating them with Ti3C2Tx MXene is proposed. Rapid fabrication of lightweight, high‐performance antennas operating in the Ku‐band (12.4–18 GHz) has been demonstrated. The MXene‐coated antennas exhibit comparable electromagnetic performance to conventional, costly aluminum ones, with ...
Zahra Sarpanah Sourkouhi, Jamal Alhourani, Yury Gogotsi, Mohammad H. Zarifi   +3 more
wiley   +1 more source

Primordial Lithium from Globular Cluster Turnoff Stars: M13 and M71

The Astrophysical Journal
During Big Bang nucleosynthesis (BBN) in the first 15 minutes of the Universe, some ^7 Li was created along with isotopes of H and He. The determination of that primordial value of Li can help constrain the conditions at that time.
Ann Merchant Boesgaard, Constantine P. Deliyannis   +1 more
doaj   +1 more source

Molecular astronomy of cool stars and sub-stellar objects

, 2009
The optical and infrared spectra of a wide variety of `cool' astronomical objects including the Sun, sunspots, K-, M- and S-type stars, carbon stars, brown dwarfs and extrasolar planets are reviewed.
Aoki W, Aoki W, Asplund M, Ayres TR, Bernath PF, Cox AN, Davis SP, Farmer CB, Farmer CB, Hase F, Hinkle K, Hinkle K, Hinkle K, Jonsson J, Jonsson J, Jørgensen UG, Kaler JB, Kurucz RL, Livingston W, Livingston W, Nordh HL, Peter F. Bernath, Tsuji T, Van Eck S, Wallace L, Wallace L, Wallace L, Wallace L, Wallace L, Wallace L, Wallace L, Wallace L, Winkel RJ   +32 more
core   +1 more source

The Stagnation of Contemporary Stellar Astronomy [PDF]

Proceedings of Accelerating the Rate of Astronomical Discovery — PoS(sps5), 2010
The stellar astronomy has always been considered the fundamental source of knowledge about the basic building blocks of the universe - the stars. It has proved correctness of many physical theories - like e.g. the idea of nuclear fusion in stellar cores, the exchange of mass in interacting binaries or models of stellar evolution towards white dwarfs or
openaire   +2 more sources

Experimental Evidence of Free Carrier Generation in 2D Hybrid Organic–Inorganic Perovskites

Advanced Optical Materials, EarlyView.
ABSTRACT Despite the significant potential of 2D hybrid organic–inorganic perovskites (2DHOIPs) for high‐efficiency optoelectronics application‐comparable to their 3D counterparts, the fundamental carrier photogeneration remains unclear. In contrast to conventional ultrafast optical property characterization, we use ultrafast photocurrent spectroscopy ...
Tuhin Ghosh, Pan Adhikari, Yao Gao, Apparao M. Rao, Dawen Li, Haimei Zheng, Ying Shi, Letian Dou, Jianbo Gao   +8 more
wiley   +1 more source

The Whole is Greater than the Sum of the Parts: Optimizing the Joint Science Return from LSST, Euclid and WFIRST [PDF]

, 2015
The focus of this report is on the opportunities enabled by the combination of LSST, Euclid and WFIRST, the optical surveys that will be an essential part of the next decade's astronomy.
Bean, R., Connolly, A., Dell'antonio, I., Frieman, J., Gawiser, E., Gehrels, N., Gladney, L., Heitmann, K., Helou, G., Hirata, C., Ho, S., Ivezić, Ž., Jain, B., Jarvis, M., Kahn, S., Kalirai, J., Kim, A., Lupton, R., Mandelbaum, R., Marshall, P., Newman, J. A., Perlmutter, S., Postman, M., Rhodes, J., Spergel, D., Strauss, M. A., Tyson, J. A., Walkowicz, L., Wood-Vasey, W. M.   +28 more
core   +1 more source