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1.
Arrival directions of the highest-energy cosmic rays detected with the Pierre Auger Observatory
Marko Zavrtanik, Danilo Zavrtanik, Lili Yang, Serguei Vorobiov, Darko Veberič, Marta Trini, Samo Stanič, Ahmed Saleh, Gašper Kukec Mezek, Andrej Filipčič, Julien Aublin, 2015, objavljeni znanstveni prispevek na konferenci

Opis: We present the results of a search for small to intermediate scale anisotropies in the distribution of arrival directions of ultra-high energy cosmic rays recorded at the Pierre Auger Observatory. The data set, gathered in ten years of operation, includes arrival directions with zenith angles up to 80◦, and is about three times larger than that used in earlier studies. We update the test based on correlations with active galactic nuclei (AGNs) from the Véron-Cetty and Véron catalog, which does not yield a significant indication of anisotropy with the present data set. We perform a blind search for localized excess fluxes and for self-clustering of arrival directions at angular scales up to 30◦ and for different energy thresholds between 40 EeV and 80 EeV. We also examine the correlation of arrival directions with relatively nearby galaxies in the 2MRS catalog, AGNs detected by Swift-BAT, and a sample of radio galaxies with jets and with the Centaurus A galaxy. None of the searches shows a statistically significant evidence of anisotropy. The two largest departures from isotropy that were found have a post-trial probability ≈ 1.4%. One is for cosmic rays with energy above 58 EeV that arrive within 15◦ of the direction toward Centaurus A. The other is for arrival directions within 18◦ of Swift-BAT AGNs closer than 130 Mpc and brighter than 10[sup]44 erg/s, with the same energy threshold.
Najdeno v: ključnih besedah
Povzetek najdenega: ...update the test based on correlations with active galactic nuclei (AGNs) from the Véron-Cetty and...
Ključne besede: ultra-high energy cosmic rays anisotropy studies active galactic nuclei Pierre Auger Observatory
Objavljeno: 02.03.2016; Ogledov: 2632; Prenosov: 166
.pdf Polno besedilo (1,32 MB)

2.
Redshift measurement of Fermi Blazars for the Cherenkov Telescope Array
Marko Zavrtanik, Danilo Zavrtanik, Gabrijela Zaharijas, Lili Yang, Serguei Vorobiov, Samo Stanič, Gašper Kukec Mezek, Andrej Filipčič, P. Goldoni, 2015, objavljeni znanstveni prispevek na konferenci

Najdeno v: ključnih besedah
Povzetek najdenega: ...Cherenkov Telescope Array, very-high energy gamma-ray emission, active galactic nuclei, blazars, blazar redshift measurements, observational strateg...
Ključne besede: Cherenkov Telescope Array, very-high energy gamma-ray emission, active galactic nuclei, blazars, blazar redshift measurements, observational strategy optimization
Objavljeno: 11.03.2016; Ogledov: 2603; Prenosov: 171
.pdf Polno besedilo (466,41 KB)

3.
Prospects On Testing Lorentz Invariance Violation With The Cherenkov Telescope Array
Marko Zavrtanik, Danilo Zavrtanik, Gabrijela Zaharijas, Lili Yang, Serguei Vorobiov, Samo Stanič, Gašper Kukec Mezek, Andrej Filipčič, M. K. Daniel, 2015, objavljeni znanstveni prispevek na konferenci

Najdeno v: ključnih besedah
Povzetek najdenega: ...lation (LIV), Very High Energy (VHE) gamma-rays, fundamental physics probes, Active Galactic Nuclei (AGN), Gamma Ray Bursts (GRBs),...
Ključne besede: Cherenkov Telescope Array (CTA), Lorentz Invariance Violation (LIV), Very High Energy (VHE) gamma-rays, fundamental physics probes, Active Galactic Nuclei (AGN), Gamma Ray Bursts (GRBs), pulsars
Objavljeno: 14.03.2016; Ogledov: 2262; Prenosov: 160
.pdf Polno besedilo (904,49 KB)

4.
New Frontiers in Black Hole Astrophysics
2017, zbornik recenziranih znanstvenih prispevkov na mednarodni ali tuji konferenci

Najdeno v: ključnih besedah
Povzetek najdenega: ...astronomy, black holes, active galactic nuclei, gamma ray bursts, tidal disruption...
Ključne besede: astronomy, black holes, active galactic nuclei, gamma ray bursts, tidal disruption events, gravitational waves
Objavljeno: 17.08.2017; Ogledov: 1673; Prenosov: 0
.pdf Polno besedilo (106,73 KB)

5.
Very high-energy gamma-ray signature of ultrahigh-energy cosmic-ray acceleration in Centaurus A
Lili Yang, Jagdish C. Joshi, Luis Salvador Miranda, Soebur Razzaque, 2018, izvirni znanstveni članek

Najdeno v: ključnih besedah
Povzetek najdenega: ...Radio Galaxy : Active Galactic Nuclei, Cosmic Rays, Multi-Wavelength Emission...
Ključne besede: Radio Galaxy : Active Galactic Nuclei, Cosmic Rays, Multi-Wavelength Emission
Objavljeno: 20.04.2018; Ogledov: 1626; Prenosov: 0
.pdf Polno besedilo (325,57 KB)

6.
Sensitivity of the Cherenkov Telescope Array for probing cosmology and fundamental physics with gamma-ray propagation
Serguei Vorobiov, Samo Stanič, Christopher Eckner, R. Adam, A. Acharyya, F. Acero, H. Abe, H. Abdalla, Gabrijela Zaharijas, Marko Zavrtanik, Danilo Zavrtanik, Miha Živec, 2021, izvirni znanstveni članek

Opis: The Cherenkov Telescope Array (CTA), the new-generation ground-based observatory for γ astronomy, provides unique capabilities to address significant open questions in astrophysics, cosmology, and fundamental physics. We study some of the salient areas of γ cosmology that can be explored as part of the Key Science Projects of CTA, through simulated observations of active galactic nuclei (AGN) and of their relativistic jets. Observations of AGN with CTA will enable a measurement of γ absorption on the extragalactic background light with a statistical uncertainty below 15% up to a redshift z=2 and to constrain or detect γ halos up to intergalactic-magnetic-field strengths of at least 0.3 pG . Extragalactic observations with CTA also show promising potential to probe physics beyond the Standard Model. The best limits on Lorentz invariance violation from γ astronomy will be improved by a factor of at least two to three. CTA will also probe the parameter space in which axion-like particles could constitute a significant fraction, if not all, of dark matter. We conclude on the synergies between CTA and other upcoming facilities that will foster the growth of γ cosmology.
Najdeno v: ključnih besedah
Povzetek najdenega: ...Projects of CTA, through simulated observations of active galactic nuclei (AGN) and of their relativistic...
Ključne besede: Cherenkov Telescope Array, active galactic nuclei, gamma-ray experiments, axions, extragalactic magnetic fields
Objavljeno: 02.03.2021; Ogledov: 158; Prenosov: 5
URL Polno besedilo (0,00 KB)
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