6 research outputs found
МОДЕЛИРОВАНИЕ ТЕЛЕКОММУНИКАЦИОННОГО ТРАФИКА С ИСПОЛЬЗОВАНИЕМ СТОХАСТИЧЕСКИХ МУЛЬТИФРАКТАЛЬНЫХ КАСКАДНЫХ ПРОЦЕССОВ
In the work the simulation of telecommunications traffic has been examined, which has multifractal properties, based on a mathematical model of the stochastic multiplicative cascade, the weights of which are beta probability distribution.Анотаці
A Local Universe Host for the Repeating Fast Radio Burst FRB 20181030A
We report on the host association of FRB 20181030A, a repeating fast radio
burst (FRB) with a low dispersion measure (DM, 103.5 pc cm) discovered
by CHIME/FRB Collaboration et al. (2019a). Using baseband voltage data saved
for its repeat bursts, we localize the FRB to a sky area of 5.3 sq. arcmin (90%
confidence). Within the FRB localization region, we identify NGC 3252 as the
most promising host, with an estimated chance coincidence probability . Moreover, we do not find any other galaxy with M
AB mag within the localization region to the maximum estimated FRB redshift of
0.05. This rules out a dwarf host 5 times less luminous than any FRB host
discovered to date. NGC 3252 is a star-forming spiral galaxy, and at a distance
of 20 Mpc, it is one of the closest FRB hosts discovered thus far.
From our archival radio data search, we estimate a 3 upper limit on the
luminosity of a persistent compact radio source (source size 0.3 kpc at 20
Mpc) at 3 GHz to be , at least 1500
times smaller than that of the FRB 20121102A persistent radio source. We also
argue that a population of young millisecond magnetars alone cannot explain the
observed volumetric rate of repeating FRBs. Finally, FRB 20181030A is a
promising source for constraining FRB emission models due to its proximity, and
we strongly encourage its multi-wavelength follow-up.Comment: Accepted for publication in ApJ