Τίτλος:
High-energy neutrinos from X-rays flares of blazars frequently observed
by the Swift X-ray Telescope
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Blazar flares have been suggested as ideal candidates for enhanced
neutrino production. While the neutrino signal of y-ray flares has been
widely discussed, the neutrino yield of X-ray flares has received less
attention. Here, we compute the predicted neutrino signal from X-ray
flares detected in 66 blazars observed more than 50 times with the X-ray
Telescope (XRT) on board the Neil Gehrels Swift Observatory. We consider
a scenario where X-ray flares are powered by synchrotron radiation of
relativistic protons, and neutrinos are produced through photomeson
interactions between protons with their own synchrotron X-ray photons.
Using the 1 keV X-ray light curves for flare identification, the 0.5-10
keV fluence of each flare as a proxy for the all-flavour neutrino
fluence, and the IceCube point-source effective area for different
detector configurations, we calculate the number of muon and antimuon
neutrinos above 100 TeV expected for IceCube from each flaring source.
The bulk of the neutrino events from the sample originates from flares
with durations similar to 1-10 d. Accounting for the X-ray flare duty
cycle of the sources in the sample, which ranges between similar to 2
and 24 per cent, we compute an average yearly neutrino rate for each
source. The median of the distribution (in logarithm) is similar to 0.03
yr(-1), with Mkn 421 having the highest predicted rate 1.2 +/- 0.3
yr(-1), followed by 3C 273 (0.33 +/- 0.03 yr(-1)) and PG 1553+113 (0.25
+/- 0.02 yr(-1)). Next-generation neutrino detectors together with
regular X-ray monitoring of blazars could constrain the duty cycle of
hadronic X-ray flares.
Συγγραφείς:
Stathopoulos, I, S.
Petropoulou, M.
Giommi, P.
Vasilopoulos,
G.
Padovani, P.
Mastichiadis, A.
Περιοδικό:
Monthly Notices of the Royal Astronomical Society
Εκδότης:
Oxford University Press
Λέξεις-κλειδιά:
neutrinos; radiation mechanisms: non-thermal; galaxies: active; X-rays:
galaxies
DOI:
10.1093/mnras/stab3404
