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Reverberation mapping technique is an important milestone in AGN demographics, kinematics and the structure of the Broad Line Region (BLR) based on the time-delay response between the continuum and emission line. The time delay is directly…

高能天体物理现象 · 物理学 2019-12-05 Swayamtrupta Panda , Mary Loli Martínez-Aldama , Michal Zajaček

Cosmic ray (CR) feedback in galaxy evolution has seen a theoretical resurgence in the past decade, but significant uncertainties remain in CR transport through the interstellar and circum-galactic media (ISM and CGM). While several works…

星系天体物理 · 物理学 2025-09-04 Sam B. Ponnada

Context: Molecular data of extreme environments, such as Arp 220, but also NGC 253, show evidence for extremely high cosmic ray (CR) rates (10^3-10^4 * Milky Way) and mechanical heating from supernova driven turbulence. Aims: The…

宇宙学与河外天体物理 · 物理学 2015-05-20 R. Meijerink , M. Spaans , A. F. Loenen , P. P. van der Werf

Diffuse gamma-ray emission is a key tracer of cosmic rays (CRs) in galaxies, encoding information about their transport, energetics, and interactions with the interstellar medium. Interpreting the Milky Way gamma-ray sky is challenging…

The spectrum and morphology of the diffuse Galactic gamma-ray emission carries valuable information on cosmic ray (CR) propagation. Recent results obtained by analyzing Fermi-LAT data accumulated over seven years of observation show a…

高能天体物理现象 · 物理学 2016-08-05 S. Recchia , P. Blasi , G. Morlino

The circumgalactic medium (CGM) contains information on the cumulative effect of galactic outflows over time, generally thought to be caused by feedback from star formation and active galactic nuclei. Observations of such outflows via…

Galactic cosmic rays (GCRs) are affected by solar modulation while they propagate through the heliosphere. The study of the time variation of GCR spectra observed at Earth can shed light on the underlying physical processes, specifically…

太阳与恒星天体物理 · 物理学 2019-02-07 Claudio Corti , Marius S. Potgieter , Veronica Bindi , Cristina Consolandi , Chris Light , Matteo Palermo , Alexis Popkow

The time-dependent modulation of galactic cosmic rays in the heliosphere is studied by computing intensities using a time-dependent modulation model. By introducing recent theoretical advances in the transport coefficients in the model,…

高能天体物理现象 · 物理学 2015-06-17 Rex Manuel , Stefan Ferreira , Marius Potgieter

Cosmic rays (CRs) are an integral component of the interstellar medium, producing broadband emission while interacting with other Galactic matter components like the interstellar gas or magnetic fields. In addition to observations,…

高能天体物理现象 · 物理学 2022-10-12 Julia Thaler , Ralf Kissmann , Olaf Reimer

AMS-02 on board the ISS provides precise measurements of Cosmic Rays (CR) near Earth, while Voyager measures CR in the local interstellar medium, beyond the effects of solar modulation. Based on these data, we test and revise various CR…

高能天体物理现象 · 物理学 2024-01-17 Ethan Silver , Elena Orlando

Context: The HELIOS solar observation probes provide unique data regarding their orbit and operation time. One of the onboard instruments, the Experiment 6 (E6), is capable of measuring ions from 4 to several hundred MeV/nuc. Aims: In this…

空间物理 · 物理学 2019-06-05 Johannes Marquardt , Bernd Heber

We have obtained the energy spectra of cosmic ray He, B, C, O, Mg, S and Fe nuclei in the range 0.5-1.5 GeV/nuc and above using the penetrating particle mode of the High Energy Telescope, part of the Cosmic Ray Science (CRS) experiment on…

空间物理 · 物理学 2017-12-11 W. R. Webber , N. Lal , E. C. Stone , A. C. Cummings , B. Heikkila

Dynamically, cosmic rays with energies above about one GeV/nucleon may be important agents of galaxy evolution. Their pressures compare with the thermal and magnetic ones impacting galactic gas accretion, fountains and galactic outflows,…

高能天体物理现象 · 物理学 2022-05-18 A. Nuñez-Castiñeyra , I. A. Grenier , F. Bournaud , Y. Dubois , F. R. Kamal Youssef , P. Hennebelle

We have measured the isotopic abundances of neon and a number of other species in the galactic cosmic rays (GCRs) using the Cosmic Ray Isotope Spectrometer (CRIS) aboard the ACE spacecraft. Our data are compared to recent results from…

During the recent solar minimum between cycles 23 and 24 (solar minimum $P_{23/24}$) the intensity of Galactic Cosmic Rays (GCRs) measured at the Earth was the highest ever recorded since space age. It is the purpose of this paper to…

太阳与恒星天体物理 · 物理学 2014-12-04 L. -L. Zhao , G. Qin , M. Zhang , B. Heber

As galactic cosmic rays propagate through the turbulent plasma environment within the heliosphere, they undergo a process of diffusion, drift and energy loss, leading to a notable reduction in their flux. This is the solar modulation…

高能天体物理现象 · 物理学 2025-04-23 Cheng-Rui Zhu , Mei-Juan Wang

We constrain the cosmic ray (CR) population in the circumgalactic medium (CGM) of Milky Way by comparing the observations of absorption lines of OVIII ion with predictions from analytical models of CGM : precipitation (PP) and isothermal…

星系天体物理 · 物理学 2022-06-08 Manami Roy , Biman B. Nath

We have developed a model which aims to reproduce observational data of many kinds related to cosmic-ray (CR) origin and propagation: direct measurements of nuclei, antiprotons, electrons and positrons, gamma-rays, and synchrotron…

天体物理学 · 物理学 2009-10-31 I. V. Moskalenko , A. W. Strong

Cosmic Ray (CR) hits are the major contaminants in astronomical imaging and spectroscopic observations involving solid-state detectors. Correctly identifying and masking them is a crucial part of the image processing pipeline, since it may…

天体物理仪器与方法 · 物理学 2022-08-04 S. R. Bhavanam , Sumohana S. Channappayya , P. K. Srijith , Shantanu Desai

Fermi-LAT observations of the Galactic Center (GC) have revealed a spherically- symmetric excess of GeV gamma rays extending to at least 10 deg from the dynamical center of the Galaxy. A critical uncertainty in extracting the intensity,…

高能天体物理现象 · 物理学 2016-09-14 Eric Carlson , Tim Linden , Stefano Profumo