Results 111 to 120 of about 178,608 (254)

Pulsar braking and the P–$\dot{P}$ diagram [PDF]

open access: yes, 2017
The location of radio pulsars in the period–period derivative (P–P˙) plane has been a key diagnostic tool since the early days of pulsar astronomy. Of particular importance is how pulsars evolve through the P–P˙ diagram with time.
S. Johnston, A. Karastergiou
semanticscholar   +1 more source

Cherenkov Telescope Array Observatory: Die Zukunft der Gammaastronomie

open access: yesPhysik in unserer Zeit, Volume 57, Issue 1, Page 10-18, January 2026.
Im Jahr 1989 hat das Wipple‐Observatorium die erste Quelle hochenergetischer Gammastrahlung entdeckt. 2002 waren dann sechs Quellen bekannt, 2024 schon mehr als 300. Und das ist immer noch lediglich die Spitze des Eisbergs in der jungen Geschichte der Gammaastronomie.
Daniela Hadasch, Daniel Mazin
wiley   +1 more source

Calculation of radar signals delay to second order in the frame of the General Relativity Theory

open access: yesACI Avances en Ciencias e Ingenierías, 2014
From the Schwarzschild metric, the light delay due to a gravitational field is calculated to second order approximation in the gravitational potential. We analize the contribution of the second order terms for strong gravitational fields as the generated
Joaquín Valerio Grefa, Carlos A. Marín
doaj   +1 more source

Axisymmetric force-free magnetosphere of a pulsar. I. The structure close to the magnetic axis

open access: yes, 2012
The stationary axisymmetric force-free magnetosphere of a pulsar is studied analytically. The pulsar equation is solved in the region close to the magnetic axis. Proceeding from linearization of the current function in the axial region, we find the axial
Bai   +23 more
core   +1 more source

Pulsar Wind Nebulae with Bow Shocks: Non-thermal Radiation and Cosmic Ray Leptons [PDF]

open access: yes, 2017
Pulsars with high spin-down power produce relativistic winds radiating a non-negligible fraction of this power over the whole electromagnetic range from radio to gamma-rays in the pulsar wind nebulae (PWNe).
A. Bykov   +5 more
semanticscholar   +1 more source

Methamphetamine‐Associated Pulmonary Arterial Hypertension: Impact, Mechanisms, and a Framework for Management

open access: yesPulmonary Circulation, Volume 16, Issue 1, January 2026.
ABSTRACT Methamphetamine‐associated pulmonary arterial hypertension (Meth‐PAH) is an increasingly prevalent but understudied subtype of Group 1 pulmonary arterial hypertension (PAH). While most prevalent in the Western United States, its reach continues to expand with the evolving global methamphetamine epidemic.
Namita Sood   +4 more
wiley   +1 more source

Leveraging Compressed Sensing and Radiomics for Robust Feature Selection for Outcome Prediction in Personalized Ultra‐Fractionated Stereotactic Adaptive Radiotherapy

open access: yesAdvanced Intelligent Systems, Volume 7, Issue 12, December 2025.
A compressed sensing (CS)‐based feature selection method is proposed to select the most informative elements in the radiomic features extracted from medical images of personalized ultra‐fractionated stereotactic adaptive treatment. The CS‐based approach is able to simplify the feature selection process and enhance the accuracy and robustness of a ...
Yajun Yu   +3 more
wiley   +1 more source

FINE STRUCTURE OF ANOMALOUSLY INTENSE PULSES OF PSR J0814+7429 RADIO EMISSION IN THE DECAMETER RANGE

open access: yesRadio Physics and Radio Astronomy, 2017
Purpose: The fine structure of the anomalously intense pulses of PSR J0814+7429 (В0809+74) has been studied. The pulsar radio emission fine structure is investigated to determine its parameters in the lowest part of spectrum available for groundbased ...
A. O. Skoryk   +6 more
doaj   +1 more source

Home - About - Disclaimer - Privacy