2011A&A...525A..80K


Query : 2011A&A...525A..80K

2011A&A...525A..80K - Astronomy and Astrophysics, volume 525A, 80-80 (2011/1-1)

TeV flux modulation in PSR B1259-63/LS 2883.

KERSCHHAGGL M.

Abstract (from CDS):

PSR B1259-63/LS 2883 is a binary system where a 48 ms pulsar orbits a massive Be star with a highly eccentric orbit (e=0.87) with a period of 3.4-years. The system exhibits variable, non-thermal radiation visible from radio to very high energies (VHE) around periastron passage. This radiation is thought to come from particles accelerated in the shock region between the pulsar wind (PW) and stellar outflows. The consistency of the HESS data with the inverse Compton (IC) scenario is studied in the context of dominant orbital-phase-dependent adiabatic losses, and the dependence of the observed TeV flux with the separation distance analysed. Model calculations based on IC scattering of shock accelerated PW electrons and UV photons are performed. Different non-radiative cooling profiles are suggested for the primary particle population to account for the variable TeV flux. The TeV fluxes obtained with HESS in the years 2004 and 2007 only seem to depend on the binary separation. The results hint at a peculiar non-radiative cooling profile around periastron dominating the VHE emission in PSR B1259-63. The location of the stellar disc derived from this non-radiative cooling profile is in good agreement with what is inferred from radio observations.

Abstract Copyright:

Journal keyword(s): astroparticle physics - radiation mechanisms: non-thermal - methods: numerical - binaries: general - gamma rays: general - pulsars: individual: PSR B1259-63

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 CPD-63 2495 HXB 13 02 47.6544015048 -63 50 08.626970292 10.34 10.72 9.98 10.03   O9.5Ve 802 0
2 V* V479 Sct HXB 18 26 15.0561548880 -14 50 54.247274304 12.02 12.23 11.27 11.04   ON6V((f))z 577 2

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