Results 41 to 50 of about 6,418 (210)

Variability in blazars

open access: yesAstroparticle Physics, 1999
The kinetic energy of bulk relativistic plasma ejected from the central engine of blazars is converted into nonthermal particle energy in the comoving frame through a process of sweeping up material from the surrounding medium. The resulting deceleration of the bulk plasma introduces a number of effects which must be included in blazar modeling.
openaire   +2 more sources

Testing the blazar spectral sequence: X-ray-selected blazars [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2008
11 figures and 6 tables.
Maraschi, L.   +4 more
openaire   +2 more sources

BLAZAR ANTI-SEQUENCE OF SPECTRAL VARIABILITY FOR INDIVIDUAL TeV BLAZARS [PDF]

open access: yesInternational Journal of Modern Physics: Conference Series, 2013
We compile from literature the broadband SEDs of twelve TeV blazars observed simultaneously or quasi-simultaneously with Fermi/LAT and other instruments. Two SEDs are available for each of the objects and the state is identified as a low or high state according to its flux density at GeV/TeV band.
Zhang, Jin   +2 more
openaire   +2 more sources

On the Nature of MeV Blazars

open access: yesThe Astrophysical Journal, 2002
Accepted for publication in the Astrophysical ...
Sikora, Marek   +3 more
openaire   +2 more sources

Multi-messenger emission characteristics of blazars

open access: yesFrontiers in Astronomy and Space Sciences
Multi-messenger observations and theories of astrophysical objects are rapidly becoming a critical research area in the astrophysics scientific community. In particular, point-like objects such as BL Lacertae (BL Lac) objects, flat-spectrum radio quasars
Ronald Gamble   +10 more
doaj   +1 more source

Neutrino oscillations and blazars [PDF]

open access: yesAstroparticle Physics, 1999
14 pages, 3 postscript figures, using elsart.sty, invited talk to appear in the Proceedings of the VERITAS Workshop on TeV Astrophysics of Extragalactic Sources, eds. M. Catanese, J. Quinn, and T. Weekes (special issue of Astropart. Phys.) ** replaced by a significantly extended version **
openaire   +2 more sources

Astrophysical Neutrinos and Blazars

open access: yes, 2021
We review and discuss recent results on the search for correlations between astrophysical neutrinos and γ-ray-detected sources, with many extragalactic studies reporting potential associations with different types of blazars.
Paolo Giommi, Paolo Padovani
core   +1 more source

Study on the Gamma-Ray Radiation Properties of High-Redshift Blazars at z > 2.5

open access: yesUniverse
The high-redshift blazars are important cosmological probes for exploring the early universe and unraveling the fundamental emission processes and the structure of the active galactic nuclei.
Fan Wu, Li Zhang, Benzhong Dai
doaj   +1 more source

Exercising electrocardiograms from Thoroughbred racehorses with exercise associated sudden death

open access: yesEquine Veterinary Journal, EarlyView.
Abstract Background Exercise associated sudden death (EASD), defined as a fatal collapse in a closely monitored and previously presumed clinically healthy horse that occurs during exercise or within approximately 1 h after exercise, is disproportionately more common in equine than in human athletes.
Cristobal Navas de Solis   +3 more
wiley   +1 more source

Herschel-ATLAS: Blazars in the science demonstration phase field [PDF]

open access: yes, 2010
To investigate the poorly constrained sub-mm counts and spectral properties of blazars we searched for these in the Herschel-ATLAS (H-ATLAS) science demonstration phase (SDP) survey catalog.
David Hughes
core  

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