Results 71 to 80 of about 4,179 (318)

Recurrent Symbiotic Nova T Coronae Borealis before Outburst

Astronomy Letters, 2023
The results of photometric and spectral observations of T CrB obtained in a wide range of wavelengths in 2011–2023 are presented. We use the near-IR light curves to determine a new ephemeris JDmin=2455828,9+227,55E for the times of light minima when the red giant is located between the observer and the hot component. The flux ratio Ha/Hb varied from -3
Maslennikova, N. A., Tatarnikov, A. M., Tatarnikova, A. A., Dodin, A. V., Shenavrin, V. I., Burlak, M. A., Zheltoukhov, S. G., Strakhov, I. A.   +7 more
openaire   +2 more sources

Medical Fabrics with Non‐Antibiotic, Supramolecular Antimicrobial Coatings: A Preventive Approach to Combat Biofilm Formation and Bacterial Dissemination

Advanced Healthcare Materials, EarlyView.
The study presents an antibiotic‐free strategy using medical fabrics coated with supramolecular assemblies of polyarginine and hyaluronic acid. These coatings showed strong antimicrobial and anti‐biofilm activity in vitro and in vivo, achieving major bacterial load reductions, including against MRSA.
Adjara Diarrassouba, Abdessalem Rekiki, Cécile Loubière, Sabine Kuchler‐Bopp, Lauriane Petit, Cynthia Calligaro, Derry Mercer, Aurore Gaudin, Naomi Canourgues, Emilie Adicéam, Benoit Beitz, Jeremy Welsch, Annabelle Vigué, Markus j. Kettel, Michael Karl, Chloé Guilbaud‐Chéreau, Philippe Lavalle, Nihal Engin Vrana, Skander Hathroubi   +18 more
wiley   +1 more source

Ancient Nova Shells of RX Pup Indicate Evolution of Mass Transfer Rate

The Astrophysical Journal Letters
RX Pup is a symbiotic binary that experienced a nova outburst in the 1970s. Here we report a discovery of a ∼1300 yr old nova shell around the system and a possible detection of a ∼7000 yr old nova shell. Together with the nova shell ejected in the 1970s,
Krystian Iłkiewicz, Joanna Mikołajewska, Michael M. Shara, Jacqueline K. Faherty, Simone Scaringi   +4 more
doaj   +1 more source

The Golden Age of Cataclysmic Variables and Related Objects (Old and News)

Acta Polytechnica CTU Proceedings, 2015
In this paper we review cataclysmic variables (CVs) discussing several hot points about the renewing interest of today astrophysics about these sources.
F. Giovannelli, L. Sabau-Graziati
doaj   +1 more source

Fermi LAT Gamma-ray Detections of Classical Novae V1369 Centauri 2013 and V5668 Sagittarii 2015

, 2016
We report the Fermi Large Area Telescope (LAT) detections of high-energy (>100 MeV) gamma-ray emission from two recent optically bright classical novae, V1369 Centauri 2013 and V5668 Sagittarii 2015.
Cheung, C. C., Corbet, R. H. D., Desiante, R., Jean, P., Knodlseder, J., Longo, F., Pivato, G., Shore, S. N., Starrfield, S., Stawarz, L., Wood, D. L., Wood, K. S.   +11 more
core   +2 more sources

Radiation Effects in Electret Organic Thin‐Film Transistors Due to High Flux and High Dose X‐Ray Irradiation

Advanced Materials, EarlyView.
Electret‐style organic thin‐film transistors are evaluated for synchrotron X‐ray dosimetry at ultra‐high dose rates, showing promising performance and agreement with standard detectors. XPS and NEXAFS reveal radiation‐induced oxidation and Fermi level shifts in pentacene and polystyrene, correlating with reduced charge carrier mobility and providing ...
Alexandria Mitchell, Jessie A. Posar, James Cayley, Georgia York, Michael Lerch, Attila J. Mozer, Igor Píš, Elena Magnano, Luca Tosti, Maddalena Pedio, Alasdair Syme, Ian G. Hill, Marco Petasecca   +12 more
wiley   +1 more source

The spectroscopic evolution of the recurrent nova T Pyxidis during its 2011 outburst. II.The optically thin phase and the structure of the ejecta in recurrent novae

, 2012
We continue our study of the physical properties of the recurrent nova T Pyx, focussing on the structure of the ejecta in the nebular stage of expansion during the 2011 outburst.
Aquino, I. De Gennaro, Augusteijn, T., Schwarz, G. J., Shore, S. N., Sion, E. M., Starrfield, S., Walter, F. M.   +6 more
core   +1 more source

Modelling the recurrent nova CI Aql in quiescence [PDF]

Astronomy & Astrophysics, 2003
9 pages 14 eps figures, to appear in Astron.
Lederle, C., Kimeswenger, S.
openaire   +2 more sources

Light‐Driven Reconfigurable Logic in a Monolithic Perovskite Device via Nonlinear Photoresponse Switching

Advanced Materials, EarlyView.
This study demonstrates a monolithic perovskite OELG device that performs all eight logic operations, including XOR and XNOR, without external bias. Enabled by trap‐engineered MAPbI3:PLL and dual photogates, it achieves reconfigurable logic and parallel decoding of amplitude–frequency signals, supporting scenario‐configured logic‐level separation for ...
Dante Ahn, Youngsoo Jang, Minz Lee, WooKyung Jeon, Yohan Yoon, Heon Lee, Assa Aravindh Sasikala, Namsoo Lim, Chandran Balamurugan, Hyeonghun Kim, Gun‐Young Jung, Sooncheol Kwon, Minah Seo, Yusin Pak   +13 more
wiley   +1 more source

Evolutionary Period Changes for 52 Cataclysmic Variables, and the Failure for the Most-fundamental Prediction of the Magnetic Braking Model

The Astrophysical Journal
The evolution of cataclysmic variables (CVs) is driven by period changes ( $\dot{P}$ ), for which the long-venerable consensus is the magnetic braking model (MBM).
Bradley E. Schaefer
doaj   +1 more source