Results 31 to 40 of about 371,246 (330)

TeV GAMMA RAYS: OBSERVATIONS VERSUS EXPECTATIONS & THEORY

Acta Polytechnica, 2013
The scope of this paper is to discuss two important questions relevant for TeV γ-ray astronomy; the pursuit to reveal the origin of cosmic rays in our galaxy, and the opacity of the universe in γ-rays.
Frank Krennrich
doaj   +1 more source

EAS Arrays at High Altitudes Start the Era of UHE γ-ray Astronomy

Universe, 2021
The evolution of extensive air shower detection as a technique for γ-ray astronomical instrumentation for the last three decades is reviewed. The first discoveries of galactic PeVatrons by the Large High Altitude Air Shower Observatory demonstrate the ...
Zhen Cao
doaj   +1 more source

Extragalactic and galactic sources: New evidence, new challenges, new opportunities

EPJ Web of Conferences, 2013
Recent data bring in sharper focus the issue of relative contributions of galactic and extragalactic sources of ultrahigh-energy cosmic rays. On the one hand, there is some new evidence, from gamma-ray observations of blazars, that cosmic rays are ...
Kusenko Alexander
doaj   +1 more source

The Kinematic Bimodality: Efficient Feedback and Cold Gas Deficiency in Slow-rotating Galaxies

The Astrophysical Journal Letters, 2023
The bimodality in the stellar spin of low-redshift (massive) galaxies, ubiquitously existing at all star formation levels and in diverse environments, suggests that galaxies grow and quench through two diverged evolutionary pathways.
Bitao Wang, Yingjie Peng
doaj   +1 more source

Status of the VERITAS Observatory [PDF]

, 2008
VERITAS, an Imaging Atmospheric Cherenkov Telescope (IACT) system for gammma-ray astronomy in the GeV-TeV range, has recently completed its first season of observations with a full array of four telescopes.
A. Cannon, A. Cesarini, A. D. Falcone, A. Furniss, A. Imran, A. Konopelko, A. McCann, A. W. Smith, A. Weinstein, B. Zitzer, C. M. Hui, D. A. Williams, D. B. Kieda, D. Hanna, D. Horan, D. Pandel, D. Steele, E. Aliu, E. Hays, F. Krennrich, Felix A. Aharonian, Frank Rieger, G. Finnegan, G. Gyuk, G. H. Gillanders, G. H. Sembroski, G. Maier, H. J. Rose, H. Krawczynski, J. A. Toner, J. E. Ward, J. Grube, J. H. Buckley, J. Holder, J. Kildea, J. Niemiec, J. P. Finley, J. Quinn, J. S. Perkins, K. L. Byrum, K. Ragan, L. C. Reyes, L. Ciupik, L. F. Fortson, L. Valcarcel, M. Beilicke, M. J. Lang, M. K. Daniel, M. Kertzman, M. McCutcheon, M. Pohl, M. Schroedter, M. Wood, N. Karlsson, O. Celik, P. Cogan, P. Colin, P. Fortin, P. Kaaret, P. Moriarty, P. T. Reynolds, R. A. Ong, R. Guenette, R. J. White, R. Mukherjee, R. Wagner, S. A. Wissel, S. J. Fegan, S. LeBohec, S. M. Bradbury, S. P. Swordy, S. P. Wakely, T. Arlen, T. B. Humensky, T. C. Weekes, T. Ergin, T. Nagai, V. A. Acciari, V. Bugaev, V. V. Vassiliev, W. Benbow, W. Cui, Werner Hofmann, Y. Butt, Y. C. K. Chow   +84 more
core   +3 more sources

Galactic AGB stars from the IPHAS survey [PDF]

, 2009
The INT Photometric H-Alpha Survey (IPHAS) is particular effective in tracing asymptotic giant branch (AGB) stars across the Galactic disk due to its use of broad-band r' and i' filters, and the clear separation of the dwarf and giant branches in the ...
Barlow, M. J., Drew, J. E., Greimel, R., Matsuura, M., Wright, N. J.   +4 more
core   +1 more source

The Full Spectrum Galactic Terrarium: MHz to TeV Observations of Various Critters [PDF]

, 2008
Multi-wavelength studies at radio, infrared, optical, X-ray, and TeV wavelengths have discovered probable counterparts to many Galactic sources of GeV emission detected by EGRET.
A. Djannati-Atai, A. Weinstein, C. Brogan, E. D. Grundstrom, E. de Oña Wilhelmi, Felix A. Aharonian, Frank Rieger, G. G. Pooley, J. W. T. Hessels, K. S. Wood, M. Lyutikov, M. V. McSwain, Mallory S. E. Roberts, P. S. Ray, R. Terrier, S. Johnston, S. M. Dougherty, S. Ransom, Werner Hofmann   +18 more
core   +4 more sources

Introduction to Properties of Galactic X-Ray Sources [PDF]

Journal of Astronomy and Space Sciences, 1988
Since the successful observation by Uhuru, the first astronomical satellite, X-ray astronomy has become one of the rapidly developing fields in astronomy.
Chul-Sung Choi, Kyoung W. Min, Tu-Hwan Kim   +2 more
doaj  

A new near-IR window of low extinction in the Galactic plane [PDF]

, 2018
Reproduced with permission from Astronomy & Astrophysics. © 2018 ESO. Comments: 6 pages, 6 figures. Accepted for publication in Astronomy & AstrophysicsAims.
Alonso-García, Javier, Barbá, Rodolfo, Gonzalez, Oscar A., Irwin, Mike, Kammers, Roberto, Lucas, Philip, Majaess, Daniel, Minniti, Dante, Rejkuba, Marina, Saito, Roberto K., Valenti, Elena   +10 more
core   +5 more sources

The Rapid Optical Variability of the Nearby Radio-loud AGN Pictor A: Introducing the Quaver Pipeline for AGN Science with TESS

The Astrophysical Journal, 2023
The sampling strategy of the Transiting Exoplanet Survey Satellite (TESS) makes TESS light curves extremely valuable for investigating the high cadence optical variability of active galactic nuclei (AGN).
Krista Lynne Smith, Lia F. Sartori
doaj   +1 more source