41. M31 gamma-ray emission - a closer look at different explanationsChristopher Eckner, Pasquale D. Serpico, Jovana Petrovic, Tijana Prodanovic, 2017, objavljeni znanstveni prispevek na konferenci Ključne besede: Milky Way, M31, gamma-rays, millisecond pulsars, dark matter
Objavljeno v RUNG: 30.01.2018; Ogledov: 3963; Prenosov: 149
 Celotno besedilo (773,73 KB) |
42. Very high-energy gamma-ray signature of ultrahigh-energy cosmic-ray acceleration in Centaurus AJagdish Joshi, Marlui Miranda, Lili Yang, Soebur Razzaque, 2017, objavljeni povzetek znanstvenega prispevka na konferenci Opis: The association of at least a dozen ultrahigh-energy cosmic-ray (UHECR) events with energy 54 EeV or higher detected by the Pierre Auger Observatory from the direction of Centaurus-A, the nearest radio galaxy, supports the scenario of UHECR acceleration in the jets of radio galaxies. Multiwavelength observations of Centaurus-A suggest that the inner jet is likely the site for particle acceleration, which emits in X-ray to very high-energy (VHE) gamma-ray. We model broadband spectral energy distribution with emission from shock-accelerated electrons and protons in a combined synchrotron-self-Compton and photo-hadronic scenario. The UHECR flux from Centaurus-A, required to explain Pierre Auger data, successfully explains observed VHE gamma rays as photo-hadronic emission.
Ključne besede: Centaurus A, gamma ray, cosmic rays
Objavljeno v RUNG: 17.01.2018; Ogledov: 3222; Prenosov: 0
Gradivo ima več datotek! Več... |
43. |
44. |
45. Prospects for Cherenkov Telescope Array Observations of the Young Supernova Remnant RX J1713.7−3946Fabio Acero, Gašper Kukec Mezek, Samo Stanič, Serguei Vorobiov, Lili Yang, Danilo Zavrtanik, Marko Zavrtanik, 2017, izvirni znanstveni članek Ključne besede: very-high energy gamma-rays, supernova remnants (SNR), SNR RX J1713.7−3946, Cherenkov Telescope Array
Objavljeno v RUNG: 10.05.2017; Ogledov: 4769; Prenosov: 0
Gradivo ima več datotek! Več... |
46. |
47. The spectrum and morphology of the Fermi bubblesGabrijela Zaharijas, M. Ackermann, Adrien Albert, W. B. Atwood, L. Baldini, J. Ballet, G. Barbiellini, D. Bastieri, R. Bellazzini, E. Bissaldi, R. D. Blandford, 2014, izvirni znanstveni članek Ključne besede: high energy astrophysics, gamma-rays, diffuse background
Objavljeno v RUNG: 09.05.2017; Ogledov: 4223; Prenosov: 21
 Povezava na celotno besedilo |
48. |
49. |
50. FERMI-LAT OBSERVATIONS OF THE LIGO EVENT GW150914Gabrijela Zaharijas, Collaboration Fermi LAT, Collaboration LIGO, 2016, izvirni znanstveni članek Opis: The Fermi Large Area Telescope (LAT) has an instantaneous field of view (FoV) covering ~1 5 of the sky and it completes a survey of the entire sky in high-energy gamma-rays every 3 hr. It enables searches for transient phenomena over timescales from milliseconds to years. Among these phenomena could be electromagnetic counterparts to gravitational wave (GW) sources. In this paper, we present a detailed study of the LAT observations relevant to Laser Interferometer Gravitational-wave Observatory (LIGO) event GW150914, which is the first direct detection of gravitational waves and has been interpreted as being due to the coalescence of two stellar-mass black holes. The localization region for GW150914 was outside the LAT FoV at the time of the GW signal. However, as part of routine survey observations, the LAT observed the entire LIGO localization region within ∼70 minutes of the trigger and thus enabled a comprehensive search for a γ-ray counterpart to GW150914. The study of the LAT data presented here did not find any potential counterparts to GW150914, but it did provide limits on the presence of a transient counterpart above 100 MeV on timescales of hours to days over the entire GW150914 localization region.
Ključne besede: gravitational waves, gamma rays
Objavljeno v RUNG: 20.06.2016; Ogledov: 4678; Prenosov: 0
Gradivo ima več datotek! Več... |
