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200 papers

We discuss the region of transition between galactic and extragalactic cosmic rays. The exact shapes and compositions of these two components contains information about important parameters of powerful astrophysical sources and the…

Astrophysics · Physics 2008-11-26 Todor Stanev

This guide presents, in a uniform manner, all the information collected by the IUE satellite on normal galaxies. It contains information on 274 galaxies and it supersedes the previous IUE guide to normal galaxies (Longo & Capaccioli 1992).…

Astrophysics · Physics 2007-05-23 Liliana Formiggini , Noah Brosch

Recent observations by ground-based gamma-ray telescopes have led to the publication of catalogs listing sources observed in the TeV and PeV energy ranges. Photons of such high energy are strongly absorbed during propagation over…

High Energy Astrophysical Phenomena · Physics 2025-02-14 Paolo Lipari , Silvia Vernetto

We cross-matched the 4XMM-DR10 catalog with the HyperLEDA database and obtained the new sample of galaxies that contain X-ray sources. Excluding duplicate observations and false matches, we present a total of 7759 galaxies with X-ray…

Astrophysics of Galaxies · Physics 2023-02-08 N. Pulatova , A. Tugay , L. Zadorozhna , R. Seeburger , O. Gugnin

After a brief historical overview we discuss the luminous X-ray sources in globular clusters of our Galaxy. This is followed by an overview of the very luminous X-ray sources studied in globular clusters of 14 other galaxies, and a…

Astrophysics · Physics 2007-05-23 Frank Verbunt , Walter H. G. Lewin

Regions that currently are or have been subject to a strong process of star formation are good candidates to be intense gamma-ray and neutrino emitters. They may even perhaps be sites where ultra high energy cosmic rays are produced.…

Astrophysics · Physics 2009-11-13 Diego F. Torres , Eva Domingo-Santamaria

Population studies of EGRET gamma-ray sources indicate that there is a distinctive population of bright sources at low galactic latitudes. The sources have a distribution consistent with that of young galactic objects, with a concentration…

Astrophysics · Physics 2009-11-10 Valenti Bosch-Ramon , Gustavo E. Romero , Josep M. Paredes

We provide our estimates of the intensity of the gamma-ray emission with an energy near 0.1 TeV generated in inrergalactic space in the interactions of cosmic rays with background emissions. We assume that the cosmic ray sources are…

High Energy Astrophysical Phenomena · Physics 2017-08-30 A. V. Uryson

This paper summarizes recents results in gamma-ray astronomy, most of which were derived with data from ground-based gamma-ray detectors. Many of the contributions presented at this conference involve multiwavelength studies which combine…

Astrophysics · Physics 2007-05-23 Martin Pohl

Galaxy groups host the majority of matter and more than half of all the galaxies in the Universe. Their hot ($10^7$ K), X-ray emitting intra-group medium (IGrM) reveals emission lines typical of many elements synthesized by stars and…

Cosmology and Nongalactic Astrophysics · Physics 2021-06-28 Fabio Gastaldello , Aurora Simionescu , Francois Mernier , Veronica Biffi , Massimo Gaspari , Kosuke Sato , Kyoko Matsushita

A long BeppoSAX observation of the Galactic Center region shows that the spectrum of the diffuse X-ray emission from the SgrA Complex can be described with the sum of two thermal plasma models with temperatures of ~0.6 keV and \~8-9 keV.…

Astrophysics · Physics 2007-05-23 L. Sidoli , S. Mereghetti

Assuming that soft X-ray sources in symbiotic stars result from strong thermonuclear runaways, and supersoft X-ray sources from weak thermonuclear runaways or steady hydrogen burning symbiotic stars, we investigate the Galactic soft and…

Solar and Stellar Astrophysics · Physics 2015-05-13 Chunhua Zhu , Guoliang Lu , Zhaojun Wang , Jun Zhang

Gamma-ray studies are an essential tool in our search for the origin of cosmic rays. Instruments like the Fermi-LAT, H.E.S.S., MAGIC and VERITAS have revolutionized our understanding of the high energy Universe. This paper describes the…

High Energy Astrophysical Phenomena · Physics 2012-04-23 Stefan Funk

We report here an all-sky soft gamma-ray source catalog based on IBIS observations performed during the first 1000 orbits of INTEGRAL. The database for the construction of the source list consists of all good quality data available from…

High Energy Astrophysical Phenomena · Physics 2016-04-13 A. J. Bird , A. Bazzano , A. Malizia , M. Fiocchi , V. Sguera , L. Bassani , A. B. Hill , P. Ubertini , C. Winkler

I summarize the highlights of the conference. First I provide a brief history of the beach symposia series our massive star community has been organizing. Then I use most of my allocated space discussing what I believe are the main answered…

Astrophysics · Physics 2009-11-13 Claus Leitherer

In the last talk of the conference I summarized the main progress and contributions to high energy astrophysics made by studies of microquasars in our Galaxy. To stimulate the general discussion I have underlined some of the questions that…

Astrophysics · Physics 2007-05-23 I. F. Mirabel

The properties of the interstellar medium (ISM) of the highest-redshift galaxies and quasars provide important indications of the complex interplay between the accretion of baryons onto galaxies, the physics that drives the build-up of…

Astrophysics of Galaxies · Physics 2021-12-15 Evanthia Hatziminaoglou , Gergö Popping , Martin Zwaan

Thirty years after the discovery of the first very-high-energy {\gamma}-ray source by the Whipple telescope, the field experienced a revolution mainly driven by the third generation of imaging atmospheric Cherenkov telescopes (IACTs). The…

High Energy Astrophysical Phenomena · Physics 2021-12-24 Mathieu de Naurois

Our view of galaxy evolution has been dramatically enhanced by the recent deep field submm surveys carried out with the SCUBA camera on the JCMT. SCUBA has discovered a population of luminous infrared galaxies at redshifts ~1-4 that emit…

Astrophysics · Physics 2009-10-31 D. B. Sanders

The past decade has seen a large progress in the X-ray investigation of early-type galaxies of the local universe, and first attempts have been made to reach redshifts z>0 for these objects, thanks to the high angular resolution and…

High Energy Astrophysical Phenomena · Physics 2010-11-10 S. Pellegrini