Results 81 to 90 of about 241,534 (269)

Detection of an exoplanet around the evolved K giant HD 66141

, 2012
Aims. We have been carrying out a precise radial velocity (RV) survey for K giants to search for and study the origin of the lowamplitude and long-periodic RV variations. Methods. We present high-resolution RV measurements of the K2 giant HD 66141 from
Han, I., Kim, K. -M., Lee, B. -C., Mkrtichian, D. E., Park, M. -G.   +4 more
core   +1 more source

Bioresorbable Mo–W Electrodes: Toward an Extended Operational Lifetime Through Controlled Alloying and Oxide Coating Engineering

Advanced Materials Interfaces, EarlyView.
Bioresorbable electrochemical sensors face instability in biofluids. Although alloys can mitigate rapid in vivo dissolution, Mo–W remains underexplored for sensing. This work engineers Mo–W films with a nanocrystalline oxide coating, improving stability and enabling reliable oxygen and pH sensing for up to 10 days, highlighting their potential for ...
C. Fernandes, Filippo Franceschini, Kitty Baert, Jon Ustarroz, I. Taurino   +4 more
wiley   +1 more source

A Combined TESS and Ground-based Study of Transit Timing Variations in HAT-P-16, TOI-1516 and TOI-2046 Systems

The Astronomical Journal
We present new results for the hot Jupiters HAT-P-16b, TOI-1516b, and TOI-2046b, based on photometric observations collected using both space- and ground-based facilities.
E. Sonbas, K. Kaplan, M. Tanriver, A. Keskin, K. Dhuga, A. Bulut, E. Göğüş, W. Ogłoza   +7 more
doaj   +1 more source

Large resolution-weighted étendue space telescope designs categorized by tertiary mirror location diversity

Journal of the European Optical Society-Rapid Publications
Modern observational astronomy makes extensive use of deep, wide-field imaging and large spectroscopic surveys, defining telescope design spaces in which angular resolution, achievable depth, and survey efficiency are considered jointly rather than ...
Cho Hyejeon, Park Hyosun, Jee M. James, Kim Daewook   +3 more
doaj   +1 more source

High Angular Resolution Stellar Imaging with Occultations from the Cassini Spacecraft I: Observational Technique

, 2013
We present novel observations utilising the Cassini spacecraft to conduct an observing campaign for stellar astronomy from a vantage point in the outer solar system. By exploiting occultation events in which Mira passed behind the Saturnian ring plane as
Hedman, Matthew M., Lloyd, James P., Nicholson, Philip D., Stewart, Paul N., Tuthill, Peter G.   +4 more
core   +1 more source

Layered Nanoporous Platforms for SERS Sensing

Advanced Materials Interfaces, EarlyView.
Here, we present a detailed investigation of the SERS performance of layered nanoporous metals. The controlled deposition of well‐defined, stacked porous layers enabled a systematic analysis of the effects of multimetallic systems in SERS experiments. Numerical models are also used to support the experimental findings.
Yanqiu Zou, Anastasiia Sapunova, Tommaso Giovannini, Chen Wang, Huaizhou Jin, Vincenzo Caligiuri, Sergio Marras, Andrea Schirato, Luca Bursi, Alessandro Alabastri, Shukun Weng, Ali Douaki, German Lanzavecchia, Ivan Marri, Roman Krahne, Nicolò Maccaferri, Zhenrong Zheng, Shangzhong Jin, Denis Garoli   +18 more
wiley   +1 more source

Integrated Study of X-Ray Spectrum and Time Lags for HBL Mrk 421 within the Framework of the Multiple-zone Leptonic Model

The Astrophysical Journal
We present the timing analysis of 10 archived XMM-Newton observations with an exposure of >40 ks of Markarian 421. Mrk 421 is the brightest high-frequency-peaked BL Lac object emitting in X-rays produced by electrons accelerated in the innermost regions ...
Wen Hu, Jia-Lai Kang, Zhen-Yi Cai, Jun-Xian Wang, Zhen-Bo Su, Guang-Cheng Xiao   +5 more
doaj   +1 more source

Period changes in six contact binaries: WZ And, V803 Aql, DF Hya, PY Lyr, FZ Ori, and AH Tau

, 2008
Six contact binaries lacking a period analysis have been chosen to search for the presence of a third body. The O-C diagrams of these binaries were analyzed with the least-squares method by using all available times of minima.
A. Liakos, Alawy, Albayrak, Applegate, Binnendijk, Borkovits, Brancewicz, Brát, Byboth, Cook, Frieboes-Conde, Hall, Harmanec, Hoffman, Hoffmeister, Irwin, K. Gazeas, Kholopov, Kwee, Lanza, Lanza, Liu, Liu, Lucy, M. Wolf, Malkov, Manimanis, Mayer, Niarchos, Oh, P. Niarchos, P. Zasche, Pribulla, Rafert, Rovithis-Livaniou, Rukmini, Samec, Shapley, Shaw, Srivastava, Sterken, V. Manimanis, van Hamme, Wolf, Woltjer, Yang, Zasche, Zavala, Zessewitsch, Zhang, Zhang   +50 more
core   +1 more source

Linking Device Performance to Nanoscale Photoactivation of Grain Boundaries in 2D Hybrid Halide Perovskites

Advanced Materials Technologies, EarlyView.
The opto‐electronic response of polycrystalline (PEA)2PbBr4 thin films is investigated by correlating macroscopic photodetector performance with nanoscale mapping techniques. Grain boundary density is systematically tuned through crystallization control and linked to device responsivity.
Camilla Bordoni, Lorenzo Calcaterra, Andrea Ciavatti, Silvia Milita, Valentina Bonino, Lorenzo Margotti, Sara Cepić, Marisa Di Sabatino, Federico Boscherini, Daniela Cavalcoli, Beatrice Fraboni   +10 more
wiley   +1 more source

Inelastic O+H collisions and the OI 777nm solar centre-to-limb variation

, 2018
The OI 777 nm triplet is a key diagnostic of oxygen abundances in the atmospheres of FGK-type stars; however it is sensitive to departures from local thermodynamic equilibrium (LTE).
Amarsi, A. M., Asplund, M., Barklem, P. S., Collet, R., Zatsarinny, O.   +4 more
core   +1 more source