Results 131 to 140 of about 1,014 (294)

The Pulsational Behaviour of Variable Stars in the Lower Part of the Instability Strip [PDF]

, 2000
The lower part of the classical instability strip and the surrounding main sequence are populated by a large variety of pulsating variable stars. In the past years a great effort was made by the stellar group of Brera Observatory to collect a large amount of photometric and spectroscopic data on Delta Sct stars, the more numerous class. In this paper I
openaire   +2 more sources

Equidistant frequency triplets in pulsating stars: The Combination Mode Hypothesis

, 2006
Multiplet structures are a common feature in pulsating stars, and can be the consequence of rotational splitting, mode interaction or sinusoidal amplitude variations.
Breger, M., Kolenberg, Katrien (Department of Astrophysics, Faculty of Earth Sciences, Geography and Astronomy, University of Vienna), M. Breger, Kolenberg, K., K. Kolenberg, Breger, Michel (Department of Astrophysics, Faculty of Earth Sciences, Geography and Astronomy, University of Vienna)   +5 more
core   +1 more source

An Experimental High‐Throughput Approach for the Screening of Hard Magnet Materials

Advanced Engineering Materials, EarlyView.
An entire workflow for the high‐throughput characterization and analysis of compositionally graded magnetic films is presented. Characterization protocols, data management tools and data analysis approaches are illustrated with test case Sm(Fe, V)12 based films.
William Rigaut, Pierre Le Berre, Hamdi Jaballah, Lukas Fink, Victor Poline, Richard Haettel, Stéphane Grenier, Gilbert Chahine, Ewen Bellec, Guillaume Buatier, Wilfried Hortschitz, Santa Pile, Thomas Schrefl, Nils Blanc, Yuan Hong, Thibaut Devillers, Nora M. Dempsey   +16 more
wiley   +1 more source

KIC 6362386: An Eclipsing Binary with γ Doradus–type Pulsations and Starspots

The Astronomical Journal
KIC 6362386 is an eclipsing binary system that exhibits both γ Doradus ( γ Dor)–type pulsations and starspots. In this study, we investigated this binary system using the Kepler photometry and the spectroscopic data from the Large Sky Area Multi-Object ...
Mengqi Jin, Jianning Fu, Xiaobin Zhang, Weikai Zong, Jiaxin Wang, Xiaoyu Ma, Keyu Xing, Haotian Wang   +7 more
doaj   +1 more source

Overview of the LAMOST survey in the first decade. [PDF]

Innovation (Camb), 2022
Yan H, Li H, Wang S, Zong W, Yuan H, Xiang M, Huang Y, Xie J, Dong S, Yuan H, Bi S, Chu Y, Cui X, Deng L, Fu J, Han Z, Hou J, Li G, Liu C, Liu J, Liu X, Luo A, Shi J, Wu X, Zhang H, Zhao G, Zhao Y.   +26 more
europepmc   +1 more source

Nondestructive Testing of Welded Composite Metal Foams

Advanced Engineering Materials, EarlyView.
X‐ray computed tomography (CT) is used to evaluate welded steel–steel composite metal foam (CMF) joints of two density classes. It reports variation in postweld spatial void distribution and correlates it to weld‐induced changes, mechanical performance, and failure within welded CMF panels.
Chinmaya Prerana Inguva, Aman Kaushik, Afsaneh Rabiei   +2 more
wiley   +1 more source

Pulsating Variable Stars in Local Group Dwarf Galaxies [PDF]

International Astronomical Union Colloquium, 2000
AbstractPulsating variables stars have had a long and prominent history in helping to map out the local Universe. Current observational techniques now make it possible to identify examples of all non-degenerate radial pulsating variables throughout much of the Local Group.
openaire   +1 more source

Caught in the Act: Observations of the Double-mode RR Lyrae V338 Boo during the Disappearance of a Pulsation Mode

The Astrophysical Journal
New results on the behavior of the double-mode RR Lyrae V338 Boo are presented. The Transiting Exoplanet Survey Satellite (TESS) observed this star again in 2022, and an observing campaign of the American Association of Variable Star Observers (AAVSO ...
Kenneth Carrell, Ronald Wilhelm, Andrew Tom, Horace Smith, Adam Popowicz, Gary Hug, Stephen M. Brincat, Fabio Salvaggio, Keith Nakonechny, Darrell Lee, Teófilo Arranz Heras, Tony Vale, Davide Mortari, André Steenkamp, Ralph Rogge, Jacek Checinski   +15 more
doaj   +1 more source

Influence of Surface Finish on the Tribological Performance of AlTiBN Coatings Deposited on Forming Tools

Advanced Engineering Materials, EarlyView.
Aluminum and nitride coatings are used in industry because they are hard, resist wear, and protect against oxidation. Adding boron can improve friction behavior and other properties. This study tests coatings on surfaces with different finishes. Results show smoother surfaces perform better, while rough ones wear faster, although coatings can reduce ...
Adrián Claver, Iker Alfonso, Eneko Barba, Javier León, José Antonio García, Iñaki Zalakain, Iván Fernández Martínez, Arley García‐Carrero, Christian Almeyda, Daniel Salcedo   +9 more
wiley   +1 more source

Stellar Pulsation and Evolution: A Combined Theoretical Renewal and Updated Models (SPECTRUM). I. Updating Radiative Opacities for Pulsation Models of Classical Cepheid and RR-Lyrae

The Astrophysical Journal
Pulsating stars are universally recognized as precise distance indicators and tracers of stellar populations. Their variability, combined with well-defined relationships between pulsation properties and intrinsic evolutionary parameters such as ...
Giulia De Somma, Marcella Marconi, Santi Cassisi, Roberto Molinaro   +3 more
doaj   +1 more source