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200 papers

The cosmic ray electrons measured by Voyager 1 between 3-70 MeV beyond the heliopause have intensities several hundred times those measured at the Earth by PAMELA at nearly the same energies. This paper compares this new V1 data with data…

Space Physics · Physics 2017-04-03 W. R. Webber , T. L. Villa

The energy domain between 10 MeV and hundreds of GeV is an essential one for the multifrequency study of extreme astrophysical sources. The understanding of spectra of detected gamma rays is necessary for developing models for acceleration,…

Astrophysics · Physics 2007-05-23 Aldo Morselli

High-energy gamma-ray emission from the Galactic plane above ~100 MeV is composed of three main contributions: diffuse emission from cosmic ray interactions in the interstellar medium, emission from extended sources, such as supernova…

High Energy Astrophysical Phenomena · Physics 2015-06-05 A. Neronov , D. Malyshev , M. Chernyakova , A. Lutovinov

Diffuse $\gamma$-ray emission produced by the interaction of cosmic-ray particles with matter and radiation in the Galaxy can be used to probe the distribution of cosmic rays and their sources in different regions of the Galaxy. With its…

The e-ASTROGAM is a gamma-ray space mission to be proposed as the M5 Medium-size mission of the European Space Agency. It is dedicated to the observation of the Universe with unprecedented sensitivity in the energy range 0.2 - 100 MeV,…

We present a consistent total flux catalogue for a $\sim$1 deg$^2$ subset of the COSMOS region (R.A. $\in [149.55\degr, 150.65\degr]$, DEC $\in [1.80\degr, 2.73\degr]$) with near-complete coverage in 38 bands from the far-ultraviolet to the…

Astrophysics of Galaxies · Physics 2016-11-15 S. K. Andrews , S. P. Driver , L. J. M. Davies , Prajwal R. Kafle , Aaron S. G. Robotham , Angus H. Wright

Some pulsars have their maximum observable energy output in the gamma-ray band, offering the possibility of using these high-energy photons as probes of the particle acceleration and interaction processes in pulsar magnetospheres. After an…

Astrophysics · Physics 2009-06-23 D. J. Thompson

Recent studies have found a positive correlation between the star-formation rate of galaxies and their gamma-ray luminosity. Galaxies with a high star-formation rate are expected to produce a large amount of high-energy cosmic rays, which…

High Energy Astrophysical Phenomena · Physics 2016-08-17 Cesar Rojas-Bravo , Miguel Araya

We have used the Giant Meterwave Radio Telescope (GMRT) to measure the Galactic HI 21-cm line absorption towards 102 extragalactic radio continuum sources, located at high (|b| >15deg.) Galactic latitudes. The Declination coverage of the…

Astrophysics · Physics 2009-11-10 Rekhesh Mohan , K. S. Dwarakanath , G. Srinivasan

We measure characteristics of plasma bubbles in GeV-class laser-plasma accelerators (LPAs) using Faraday rotation diagnostics. We extend these techniques, previously demonstrated for LPAs in atmospheric density plasmas (electron density…

We have mapped the total sky brightness at 1465 MHz in two adjacent 60-degree declination bands with the portable 5.5-m parabolic reflector of the Galactic Emission Mapping (GEM) project, an on-going international collaboration to survey…

Astrophysics · Physics 2007-05-23 C. Tello , T. Villela , G. F. Smoot , S. Torres , M. Bersanelli

XMM-Newton observations of the starburst galaxy NGC 1511 reveal the presence of a previously unknown extended hot gaseous phase of its ISM, which partly extends out of the disk plane. The emission distribution is asymmetric, being brightest…

Astrophysics · Physics 2008-11-26 M. Dahlem , M. Ehle , F. Jansen , T. M. Heckman , K. A. Weaver , D. K. Strickland

ATLAST is a particular realization of LUVOIR, the Large Ultraviolet Optical Infrared telescope, a ~10 m diameter space telescope being defined for consideration in the 2020 Decadal Review of astronomy and astrophysics. ATLAST/LUVOIR is…

Instrumentation and Methods for Astrophysics · Physics 2016-05-17 Michael Werner , Mark Swain , Gautam Vasisht , Xu Wang , Steven Macenka , Avi Mandell , Shawn Domagal-Goldman , Joel Green , Chris Stark

We describe an extensive FUSE survey of highly ionized oxygen in the vicinity of the Milky Way that serves as an example of the type of study that would be desirable for other galactic systems. Understanding the origin of hot gas in the…

Astrophysics · Physics 2007-05-23 K. R. Sembach , B. P. Wakker , B. D. Savage , P. Richter , M. Meade

We simulate the flux emitted from galaxy halos in order to quantify the brightness of the circumgalactic medium (CGM). We use dedicated zoom-in cosmological simulations with the hydrodynamical Adaptive Mesh Refinement code RAMSES, which are…

The ESO Public Survey VISTA Variables in the Via Lactea (VVV) started in 2010. VVV targets 562 sq. deg in the Galactic bulge and an adjacent plane region and is expected to run for ~5 years. In this paper we describe the progress of the…

Astrophysics of Galaxies · Physics 2015-06-03 R. K. Saito , M. Hempel , D. Minniti , P. W. Lucas , M. Rejkuba , I. Toledo , O. A. Gonzalez , J. Alonso-Garcia , M. J. Irwin , E. Gonzalez-Solares , S. T. Hodgkin , J. R. Lewis , N. Cross , V. D. Ivanov , E. Kerins , J. P. Emerson , M. Soto , E. B. Amores , S. Gurovich , I. Dekany , R. Angeloni , J. C. Beamin , M. Catelan , N. Padilla , M. Zoccali , P. Pietrukowicz , C. Moni Bidin , F. Mauro , D. Geisler , S. L. Folkes , S. E. Sale , J. Borissova , R. Kurtev , A. V. Ahumada , M. V. Alonso , A. Adamson , J. I. Arias , R. M. Bandyopadhyay , R. H. Barba , B. Barbuy , G. L. Baume , L. R. Bedin , A. Bellini , R. Benjamin , E. Bica , C. Bonatto , L. Bronfman , G. Carraro , A. N. Chene , J. J. Claria , J. R. A. Clarke , C. Contreras , A. Corvillon , R. de Grijs , B. Dias , J. E. Drew , C. Farina , C. Feinstein , E. Fernandez-Lajus , R. C. Gamen , W. Gieren , B. Goldman , C. Gonzalez-Fernandez , R. J. J. Grand , G. Gunthardt , N. C. Hambly , M. M. Hanson , K. G. Helminiak , M. G. Hoare , L. Huckvale , A. Jordan , K. Kinemuchi , A. Longmore , M. Lopez-Corredoira , T. Maccarone , D. Majaess , E. L. Martin , N. Masetti , R. E. Mennickent , I. F. Mirabel , L. Monaco , L. Morelli , V. Motta , T. Palma , M. C. Parisi , Q. Parker , F. Penaloza , G. Pietrzynski , G. Pignata , B. Popescu , M. A. Read , A. Rojas , A. Roman-Lopes , M. T. Ruiz , I. Saviane , M. R. Schreiber , A. C. Schroder , S. Sharma , M. D. Smith , L. Sodre , J. Stead , A. W. Stephens , M. Tamura , C. Tappert , M. A. Thompson , E. Valenti , L. Vanzi , N. A. Walton , W. Weidmann , A. Zijlstra

We report the results of a pilot survey for X-ray emission from a newly discovered class of AGB stars with far-ultraviolet excesses (fuvAGB stars) using XMM-Newton and Chandra. We detected X-ray emission in 3 of 6 fuvAGB stars observed --…

Solar and Stellar Astrophysics · Physics 2015-09-16 R. Sahai , J. Sanz-Forcada , C. Sanchez Contreras , M. Stute

We analyzed data from HaloSat observations for five fields in the Galactic disk located far away from the Galactic center (135$^{\circ}$ $<$ $l$ $<$ 254$^{\circ}$) to understand the nature of soft X-ray energy emission in the Galactic disk.…

High Energy Astrophysical Phenomena · Physics 2023-12-06 Kazuki Ampuku , Ikuyuki Mitsuishi , Koki Sakuta , Philip Kaaret , Daniel M. LaRocca , Lorella Angelini

The future space-based GAMMA-400 gamma-ray telescope will operate onboard the Russian astrophysical observatory in a highly elliptic orbit during 7 years to observe Galactic plane, Galactic Center, Fermi Bubbles, Crab, Vela, Cygnus X,…

The AMI Galactic Plane Survey (AMIGPS) is a large area survey of the outer Galactic plane to provide arcminute resolution images at milli-Jansky sensitivity in the centimetre-wave band. Here we present the first data release of the survey,…