Zobrazeno 1 - 10
of 7 751
pro vyhledávání: '"Johan, H."'
Autor:
Heins, Christopher, Körber, Lukas, Kim, Joo-Von, Devolder, Thibaut, Mentink, Johan H., Kákay, Attila, Fassbender, Jürgen, Schultheiss, Katrin, Schultheiss, Helmut
Driving condensed matter systems with periodic electromagnetic fields can result in exotic states not found in equilibrium. Termed Floquet engineering, such periodic driving applied to electronic systems can tailor quantum effects to induce topologic
Externí odkaz:
http://arxiv.org/abs/2409.02583
Exchange interactions govern the ordering between microscopic spins and the highest-frequency spin excitations - magnons at the edge of the Brillouin zone. As well known from spontaneous Raman scattering (RS) experiments in antiferromagnets, such mag
Externí odkaz:
http://arxiv.org/abs/2407.15962
Autor:
Amiri, Amirnezam, Knapen, Johan H., Comerón, Sébastien, Marconi, Alessandro, Lehmer, Bret. D.
Publikováno v:
A&A 689, A193 (2024)
Metallicity measurements in galaxies can give valuable clues about galaxy evolution. One of the mechanisms postulated for metallicity redistribution in galaxies is gas flows induced by AGN, but the details of this process remain elusive. We report th
Externí odkaz:
http://arxiv.org/abs/2407.12158
Autor:
Iglesias-Navarro, Patricia, Huertas-Company, Marc, Martín-Navarro, Ignacio, Knapen, Johan H., Pernet, Emilie
Publikováno v:
A&A 689, A58 (2024)
High-resolution galaxy spectra encode information about the stellar populations within galaxies. The properties of the stars, such as their ages, masses, and metallicities, provide insights into the underlying physical processes that drive the growth
Externí odkaz:
http://arxiv.org/abs/2406.18661
Autor:
McCall, Callum, Jermak, Helen E., Steele, Iain A., Kobayashi, Shiho, Knapen, Johan H., Sánchez-Alarcón, Pablo M.
Blazars are a highly variable subclass of active galactic nuclei that have been observed to vary significantly during a single night. This intranight variability remains a debated phenomenon, with various mechanisms proposed to explain the behaviour
Externí odkaz:
http://arxiv.org/abs/2402.00633
Autor:
Eskandarlou, Sepideh, Akhlaghi, Mohammad, Infante-Sainz, Raúl, Saremi, Elham, Raji, Samane, Sharbaf, Zahra, Golini, Giulia, Ghaffari, Zohreh, Knapen, Johan H.
Calibration of pixel values is a fundamental step for accurate measurements in astronomical imaging. In astronomical jargon this is known as estimating zero point magnitude. Here, we introduce a newly added script in GNU Astronomy Utilities (Gnuastro
Externí odkaz:
http://arxiv.org/abs/2312.04263
Autor:
Menéndez-Delmestre, Karín, Gonçalves, Thiago S., Sheth, Kartik, de Lima, Tomás Düringer Jacques, Kim, Taehyun, Gadotti, Dimitri A., Schinnerer, Eva, Athanassoula, E., Bosma, Albert, Elmegreen, Debra Meloy, Knapen, Johan H., Machado, Rubens E. G., Salo, Heikki
The redshift evolution of bars is an important signpost of the dynamic maturity of disk galaxies. To characterize the intrinsic evolution safe from band-shifting effects, it is necessary to gauge how bar properties vary locally as a function of wavel
Externí odkaz:
http://arxiv.org/abs/2312.04545
Gesture recognition with Brownian reservoir computing using geometrically confined skyrmion dynamics
Autor:
Grischa Beneke, Thomas Brian Winkler, Klaus Raab, Maarten A. Brems, Fabian Kammerbauer, Pascal Gerhards, Klaus Knobloch, Sachin Krishnia, Johan H. Mentink, Mathias Kläui
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-9 (2024)
Abstract Physical reservoir computing leverages the dynamical properties of complex physical systems to process information efficiently, significantly reducing training efforts and energy consumption. Magnetic skyrmions, topological spin textures, ar
Externí odkaz:
https://doaj.org/article/7957c923d0ce44caa5e289dbb0dc9047
Autor:
Martinez-Lombilla, Cristina, Infante-Sainz, Raul, Jimenez-Ibarra, Felipe, Knapen, Johan H., Trujillo, Ignacio, Comeron, Sebastien, Borlaff, Alejandro S., Roman, Javier
Publikováno v:
A&A 678, A62 (2023)
Context: The hierarchical model of galaxy formation suggests that galaxies are continuously growing. However, our position inside the Milky Way prevents us from studying the disk edge. Truncations are low surface brightness features located in the di
Externí odkaz:
http://arxiv.org/abs/2307.01106
Autor:
Román, Javier, Rich, R. Michael, Ahvazi, Niusha, Sales, Laura, Li, Chester, Golini, Giulia, Trujillo, Ignacio, Knapen, Johan H., Peletier, Reynier F., Sánchez-Alarcón, Pablo M.
Publikováno v:
A&A 679, A157 (2023)
The study of dynamically cold stellar streams reveals information about the gravitational potential where they reside and provides important constraints on dark matter properties. However, their intrinsic faintness makes detection beyond Local enviro
Externí odkaz:
http://arxiv.org/abs/2305.03073