Long-term Study of the Double Pulsar J0737-3039 with XMM-Newton: Spectral Analysis

We present a long-term spectral monitoring of the unique double pulsar binary PSR J0737-3039 corresponding to two “Large Programs” performed by XMM-Newton in 2006 and 2011. Spectral variability of pulsar emission in soft X-rays is not evident over 5 years, despite the significant relativistic spin precession in the considered time span (∼ 25^\circ ). We provide, for the first time, evidence of hard X-ray emission from the system in the 5─8 keV energy band. The standard spectral analysis was coupled to the energy dependent spatial analysis to confirm this excess, most likely ascribed to iron line emission. The Fe Kα emission line at 6.4─6.97 keV was previously unheard of in non-accreting binary systems and could testify to the presence of a relic disk that survived the supernova explosions that terminated the lives of the double pulsar’s stellar progenitors. The existence of a relic disk in this system reinforces speculation about the presence of similar structures around other peculiar classes of isolated neutron stars.

Volume

838

Issue

2

Start page

120

Uri

http://hdl.handle.net/20.500.12386/27296

Url

https://iopscience.iop.org/article/10.3847/1538-4357/aa6189

Issn Identifier

0004-637X

Ads BibCode

2017ApJ...838..120E

Rights

open.access

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Egron_2017_ApJ_838_120.pdf

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583.43 KB

Format

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Checksum (MD5)

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Name

1702.05280.pdf

Description

postprint

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454.83 KB

Format

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Long-term Study of the Double Pulsar J0737-3039 with XMM-Newton: Spectral Analysis

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