Time lag in transient cosmic accreting sources
نویسندگان
چکیده
منابع مشابه
Time Delays in Cosmic Ray Propagation
Cosmic Rays (CR) travel at speeds essentially indistinguishable from the speed of light. However whilst travelling through magnetic fields, both regular and turbulent, they are delayed behind the light since they are usually charged particles and their paths are not linear. Those delays can be so long that they are an impediment to correctly identifying sources which may be variable in time. Fu...
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We present model light curves for accreting Black Hole Candidates (BHC) based on a recently proposed model for their spectro-temporal properties. According to this model, the observed light curves and aperiodic variability of BHC are due to a series of soft photon injections at random (Poisson) intervals near the compact object and their reprocessing into hard radiation in an extended but non-u...
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A comparison is presented between the physical processes operative in single white dwarfs and the physical processes operative in white dwarfs with donor star companions. The physical properties and accretion physics of the hot accreting components in close interacting binaries is presented. The N/C abundance anomaly seen is ∼10% of cataclysmic variables and the presence of absorption lines due...
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Interstellar matter that is accreted onto isolated magnetic neutron stars in the Galaxy (∼ 10 by number) is accelerated and reflected back by MHD shocks, which envelope the stars. The integrated power in the Galaxy Lcr,ns is ∼ 10 erg s, the energy distribution is a power law of spectral index > 2, and the particle energy can be raised to 10 GeV, consistent with the power and spectrum of primary...
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We present a model for the short timescale spectral variability of accreting black holes. It describes well the time-averaged spectra as well as temporal characteristics such as powerdensity spectrum, time/phase lags, and coherence function of Cygnus X-1. We assume that X/γ-rays are produced in compact magnetic flares at radii <∼ 100GM/c from the central black hole. The tendency for magnetic lo...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2017
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201628810