Results 31 to 40 of about 5,024 (304)

Atmospheres of brown dwarfs

, 2014
ChH highlights financial support of the European Community under the FP7 by an ERC starting grant. SLC acknowledges financial support of University of LeicesterBrown Dwarfs are the coolest class of stellar objects known to date. Our present perception is
Casewell, Sarah, Helling, Christiane
core   +1 more source

Rotation in sdB stars as revealed by stellar oscillations

Open Astronomy, 2018
An interesting opportunity offered by the detection of stellar oscillations is the possibility to infer the internal rotation rate of a star through the so-called rotational splittings. Such seismic measurements remained rather scarce for hot B subdwarf (
Charpinet Stephane, Giammichele Noemi, Zong Weikai, Van Grootel Valérie, Brassard Pierre, Fontaine Gilles   +5 more
doaj   +1 more source

MAGNETISM OF WHITE DWARFS (intermediate results of a survey for kilogauss magnetic fields in white dwarfs)

Odessa Astronomical Publications, 2017
We shortly present intermidiate results of a survey for weak magnetic fields among degenerate stars (white dwarfs and hot subdwarf stars). Kilogauss upper limits of longitudinal magnetic fields are presented for several brightest DA white dwarfs and new ...
G. Valyavin, S. Bagnulo, S. Fabrika, A. Reisenegger, G. A. Wade, Inwoo Han, D. Monin   +6 more
doaj   +1 more source

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

Advanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee, Son Tung Mai, Sarath Menon, Braulio Gadiel Sánchez Ortega, Ralf Drautz, Alexander Kauffmann, Gunther Eggeler, Jan Frenzel   +7 more
wiley   +1 more source

Detection of Young Massive White Dwarfs in Core-collapsed Globular Cluster NGC 362

The Astrophysical Journal Letters
Core-collapsed globular clusters are ideal targets to explore the presence of stellar collision products. Here, we have studied 17 far-UV bright white dwarf (WD) members in the globular cluster NGC 362 using data obtained from the Ultra Violet Imaging ...
R. K. S. Yadav, Arvind K. Dattatrey, Annapurni Subramaniam, Geeta Rangwal, Ravi S. Singh   +4 more
doaj   +1 more source

Violent mergers can explain the inflated state of some of the fastest stars in the Galaxy

Astronomy & Astrophysics
A significant number of hypervelocity stars with velocities between 1500 − 2500 km s−1 have recently been observed. The only plausible explanation so far is that they were produced through thermonuclear supernovae in white dwarf binaries.
Bhat Aakash, Pakmor Rüdiger, Shen Ken J., Bauer Evan B., Rajamuthukumar Abinaya Swaruba   +4 more
doaj   +1 more source

Adult Sex Ratio as a Demographic Feedback Linking Mating Systems, Parental Care, and Evolution

Advanced Science, EarlyView.
Breeding systems are some of the most diverse social behavior, and our team is investigation the evolutionary causes of this diversity. This review summarises our research carried out at the University of Bath. We argue that demographic components of wild populations, especially the adult sex ratio, plays a key role driving breeding system variation ...
Tamás Székely, Oscar G. Miranda
wiley   +1 more source

CAST constraints on the axion-electron coupling

, 2013
In non-hadronic axion models, which have a tree-level axion-electron interaction, the Sun produces a strong axion flux by bremsstrahlung, Compton scattering, and axiorecombination, the "BCA processes." Based on a new calculation of this flux, including ...
Barth, Klaus, Belov, A., Hoffmann, D.H.H., Eleftheriadis, Christos, Miller, David W., Zioutas, K., Franz, Jürgen, Englhauser, J., Franz, J., Lakic, B., Villar, J., Gninenko, Sergei, Vieira, Joaquin D., Papaevangelou, Thomas, Riege, H., Ferrer-Ribas, E., Liolios, Anastasios, Walckiers, L., Walckiers, Louis, Kotthaus, R., Eleftheriadis, C., Belov, Alexander, Stewart, L., Pivovaroff, Mike J., Ruz, Jaime, Gómez, Héctor, Villar, José A., Davenport, Martyn, Luzón, Gloria, Jacoby, J., Semertzidis, Y., Königsmann, K., Heinsius, Fritz-Herbert, Savvidis, Ilias, Beltran, Berta, Hasinoff, M.D., Jacoby, Joachim, Vieira, J., Hoffmann, Dieter H. H., Giomataris, I., Vogel, J., Collar, J.I., García, J. A., Hasinoff, Michael D., Miller, D.W., Pivovaroff, M., Lutz, Gerhard, Carmona, J., Jakovcic, K., Jakovčić, Kresimir, Galan, J., Irastorza, I.G., Liolios, A., García, J., Ljubičić, Ante, Redondo, Javier, Friedrich, P., Heinsius, F.H., Collar, Juan I., Giomataris, Ioanis, Englhauser, Jakob, Vogel, Julia K., Kang, Donghwa, Bräuninger, Heinrich, Lutz, G., Fanourakis, G., Dafni, T., Villar, J.A., Krčmar, Milica, Bräuninger, H., Raffelt, G., Friedrich, Peter, Carmona, José Manuel, Di Lella, Luigi, Riege, Hans, Davenport, M., Rodríguez, A., Geralis, Theodoros, Kang, D., Stewart, Laura, Savvidis, I., Vieira, J.D., Fischer, H., Ljubicic, A., Pivovaroff, M.J., Galán, Javier, Collar, J., Fanourakis, George, Beltran, B., Ferrer-Ribas, Ester, Kuster, M., Luzon, G., Carmona, J.M., Papaevangelou, T., Miller, D., Irastorza, Igor Garcia, Zioutas, Konstantin, Ruz, J., Irastorza, I., Garcia, J.A., Hoffmann, D., Fischer, Horst, Dafni, Theopisti, Kousouris, Konstantinos, Raffelt, Georg, Heinsius, F., Kousouris, K., Van Bibber, K., Vogel, J.K., Barth, K., Hasinoff, M., Redondo, J., Di Lella, L., Krcmar, M., Königsmann, Kay, Gninenko, S., Lakić, Biljana, Bibber, Karl van, Gomez, H., Geralis, T., Kotthaus, Rainer, Semertzidis, Yannis   +121 more
core   +1 more source

Friend, Not Foe: Lowered Tissue Reactivity to Long‐Term Polyimide Implants

Advanced Science, EarlyView.
The choice of optimal neural probe designs remains a major challenge in the field of neurotechnology. This study investigated the biocompatibility of several probe variations, including material, thickness, width, and implantation strategy. It highlights the clear advantage of soft polyimide probes over stiff silicon probes for better device ...
Corinne Orlemann, Laura M. De Santis, Paul Neering, Christian Boehler, Kirti Sharma, Arno Aarts, Tobias Holzhammer, Rik J. J. van Daal, Patrick Ruther, Maria Asplund, Roxana N. Kooijmans, Pieter R. Roelfsema   +11 more
wiley   +1 more source

Comparative Insights and Overlooked Factors of Interphase Chemistry in Alkali Metal‐Ion Batteries

Advanced Energy Materials, EarlyView.
This review presents a comparative analysis of Li‐, Na‐, and K‐ion batteries, focusing on the critical role of electrode–electrolyte interphases. It especially highlights overlooked aspects such as SEI/CEI misconceptions, binder effects, and self‐discharge relevance, emphasizing the limitations of current understanding and offering strategies for ...
Changhee Lee, Zachary T. Gossage, Shinichi Kumakura, Shinichi Komaba   +3 more
wiley   +1 more source