Zobrazeno 1 - 10
of 4 418
pro vyhledávání: '"Pe'er A."'
Autor:
Bret, Antoine, Pe'er, Asaf
Collisionless shocks are complex nonlinear structures that are not yet fully understood. In particular, the interaction between these shocks and the particles they accelerate remains elusive. Based on an instability analysis that relates the shock wi
Externí odkaz:
http://arxiv.org/abs/2412.12911
The X-ray light curves of gamma-ray bursts (GRBs) display complex features, including plateaus and flares, that challenge theoretical models. Here, we study the properties of flares that are observed in the early afterglow phase (up to a few thousand
Externí odkaz:
http://arxiv.org/abs/2412.11533
We studied magnetically arrested disks (MAD) around rotating black holes (BH), under the influence of radiative cooling. We introduce a critical value of the mass accretion rate $\dot M_{\rm crit}$ for which the cooling by the synchrotron process eff
Externí odkaz:
http://arxiv.org/abs/2412.11440
Autor:
Klein, Yishai, Strizhevsky, Edward, Aknin, Haim, Deutsch, Moshe, Cohen, Eliahu, Pe'er, Avi, Tamasaku, Kenji, Schulli, Tobias, Karimi, Ebrahim, Shwartz, Sharon
The invention of X-ray interferometers has led to advanced phase-sensing devices that are invaluable in various applications. These include the precise measurement of universal constants, e.g. the Avogadro number, of lattice parameters of perfect cry
Externí odkaz:
http://arxiv.org/abs/2411.12702
Generative modeling typically concerns the transport of a single source distribution to a single target distribution by learning (i.e., regressing onto) simple probability flows. However, in modern data-driven fields such as computer graphics and sin
Externí odkaz:
http://arxiv.org/abs/2411.00698
Autor:
Long, Killian, Pe'er, Asaf
Synchrotron maser emission is a leading candidate to explain the coherent emission from Fast Radio Bursts (FRBs). This mechanism requires a population inversion in order to operate. We show that nonresonant interactions between Alfv\'{e}n waves and a
Externí odkaz:
http://arxiv.org/abs/2410.21022
Autor:
Vyas, Mukesh Kumar, Pe'er, Asaf
We explore a new mechanism for photon energy gain in a relativistic plasma with velocity shear. This process takes place in optically thick plasma and resembles conventional Fermi acceleration, where photons undergo multiple scatterings between regio
Externí odkaz:
http://arxiv.org/abs/2410.05089
Positive spectral lags are commonly observed in gamma-ray burst (GRB) prompt phase where soft photons lag behind hard ones in their spectral studies. Opposite to this pattern, a fraction of GRBs show a negative spectral lag where hard photons arrive
Externí odkaz:
http://arxiv.org/abs/2410.04446
Decision trees (DTs) and their random forest (RF) extensions are workhorses of classification and regression in Euclidean spaces. However, algorithms for learning in non-Euclidean spaces are still limited. We extend DT and RF algorithms to product ma
Externí odkaz:
http://arxiv.org/abs/2410.13879
The prompt phase X- and $\gamma$-ray light curves of gamma-ray bursts (GRBs) exhibit erratic and complex behaviour, often with multiple pulses. The temporal shape of individual pulses is often modelled as 'fast rise exponential decay' (FRED). Here, w
Externí odkaz:
http://arxiv.org/abs/2409.17860