Results 81 to 90 of about 56,835 (159)

Long-term evolution of cyclotron resonant scattering features in the accreting pulsar Vela X-1: A pulse-to-pulse approach

Astronomy & Astrophysics
We investigated the long-term evolution of the cyclotron line energy, as well as the relationship between cyclotron line energy and luminosity in the high-mass X-ray binary Vela X-1, based on archival Swift/BAT monitoring from 2005 to 2024 and pulse-to ...
Du Yu-Jia, Wang Peng-Ju, Ducci Lorenzo, Ji Long, Kong Ling-Da, Bu Qing-Cui, Mehrotra Chirag, Santangelo Andrea   +7 more
doaj   +1 more source

Spectre diagnostiques de reflexion des mineraux dans le domaine infrarouge lointain

Revista Mexicana de Ciencias Geológicas, 2019
Ce travail présente la première étude minéralogique en spectrométrie infrarouge de réflexion dans le domaine lointain. Dans ce domaine, les spectres de réflexion sont surtout typiques pour les composes à force de liaison interatomique relativement ...
Mikhail Ostroumov, Bernard Lasnier, Emmanuel Fritsch, Serge Lefrant   +3 more
doaj  

Local simulations of common-envelope dynamical inspiral

Astronomy & Astrophysics
Common envelope evolution is a crucial phase in binary stellar evolution. Current global three-dimensional simulations lack the resolution to capture the small-scale dynamics around the embedded companion, while local wind-tunnel simulations always ...
Gagnier Damien, Leidi Giovanni, Vetter Marco, Andrassy Robert, Röpke Friedrich K.   +4 more
doaj   +3 more sources

High-energy neutrinos from blazars [PDF]

EPJ Web of Conferences
Identifying the origin of the majority of high-energy cosmic neutrinos observed by the IceCube Neutrino Observatory remains a significant challenge. Previous studies reported evidence of a spatial correlation between blazars listed in the 5th Roma-BZCat ...
Buson S., Azzollini A., Pfeiffer L., Boughelilba M., Marchesi S., Lincetto M., Sanchez Zaballa J. M., Bremer A.   +7 more
doaj   +1 more source

XMM-Newton Observations of the Be/X-ray transient A0538-66 in quiescence

, 2004
We present XMM-Newton observations of the recurrent Be/X-ray transient A0538-66, situated in the Large Magellanic Cloud, in the quiescent state. Despite a very low luminosity state of (5-8)E33 ergs/s in the range 0.3-10 keV, the source is clearly ...
Heindl, W. A., Kretschmar, P., Kreykenbohm, I., Staubert, R., Wilms, J.   +4 more
core   +1 more source

Dynamically consistent analysis of Galactic WN4b stars

Astronomy & Astrophysics
Context. Many Wolf-Rayet (WR) stars have optically thick winds that essentially cloak the hydrostatic layers of the underlying star. In these cases, traditional spectral analysis methods are plagued by degeneracies that make it difficult to constrain ...
Lefever R. R., Sander A. A. C., Bernini-Peron M., González-Torà G., Hamann W.-R., Josiek J., Ramachandran V., Schösser E. C., Todt H.   +8 more
doaj   +1 more source

Controlling effective field contributions to laser-induced magnetization precession by heterostructure design

Communications Physics
Nanoscale heterostructure design can control laser-induced heat dissipation and strain propagation, as well as their efficiency for driving magnetization precession.
Jasmin Jarecki, Maximilian Mattern, Fried-Conrad Weber, Jan-Etienne Pudell, Xi-Guang Wang, Juan-Carlos Rojas Sánchez, Michel Hehn, Alexander von Reppert, Matias Bargheer   +8 more
doaj   +1 more source

Spiral excitation in protoplanetary disks through gap-edge illumination

Astronomy & Astrophysics
High-resolution near-infrared observations have revealed prominent two-armed spirals in a multitude of systems, such as MWC 758, SAO 206462, and V1247 Ori.
Muley Dhruv, Hühn León-Alexander, Jiang Haochang, Melon Fuksman David   +3 more
doaj   +1 more source

Search for Axion-like particles from nearby pre-supernova stars

Astronomy & Astrophysics
Context. Axion-like particles (ALPs) are hypothetical pseudoscalar bosons that arise in many extensions of the Standard Model and can be well-motivated dark-matter candidates.
Mittal Saurabh, Siegert Thomas, Calore Francesca, Carenza Pierluca, Eisenberger Laura, Giannotti Maurizio, Lella Alessandro, Mirizzi Alessandro, Tsatsis Dimitris, Yoneda Hiroki   +9 more
doaj   +1 more source

The drastic impact of Eddington-limit induced mass ejections on massive star populations

Astronomy & Astrophysics
Context. Massive stars emit copious amounts of radiation, profoundly affecting their environment in galaxies and contributing to the reionization of the Universe.
Pauli D., Langer N., Schootemeijer A., Marchant P., Jin H., Ercolino A., Picco A., Willcox R., Sana H.   +8 more
doaj   +1 more source