Title:	Lepto-hadronic model of gamma rays from Eta Carinae and prospects for neutrino telescopes.
Authors:	Gupta, Nayantara Razzaque, Soebur
Issue Date:	Dec-2017
Publisher:	American Physical Society
Citation:	Physical Review D, 2017, Vol.96, p 123017
Abstract:	The stellar binary η Carinae has been observed during its full orbital period in gamma rays by the Fermi-Large Area Telescope (LAT). The shock-accelerated electrons in the colliding winds of the two stars radiate synchrotron photons in the magnetic field of the shocked region and inverse Compton photons, where the target photons are from the thermal emissions by the more massive and luminous of the two stars. The inverse Compton emission dominates the gamma-ray flux data from the η Carinae, however the spectral energy distribution shows signature of a hadronic component in the ∼10–300  GeV range during the periastron passage. Current and future air Cherenkov telescopes will be able to constrain this component at TeV energies. Acceleration of cosmic-ray protons to ≫1  TeV energies in the colliding winds, required to explain the hadronic emission component through photopion interactions, can lead to detectable signal of ≳10  TeV neutrino events in large kilometer scale neutrino telescopes.
Description:	Open Access
URI:	http://hdl.handle.net/2289/6847
ISSN:	2470-0010 2470-0029 (online)
Alternative Location:	http://adsabs.harvard.edu/abs/2017PhRvD..96l3017G http://arxiv.org/abs/1706.10051 http://dx.doi.org/10.1103/PhysRevD.96.123017
Copyright:	2017 American Physical Society
Appears in Collections:	Research Papers (A&A)

Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.