HIGH-ENERGY X-RAYS FROM J174545.5-285829, THE CANNONBALL: A CANDIDATE PULSAR WIND NEBULA ASSOCIATED WITH Sgr A EAST
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Author(s)
Nynka, Melania
Hailey, Charles J.
Mori, Kaya
Bauer, Franz E.
Boggs, Steven E.
Craig, William W.
Christensen, Finn E.
Gotthelf, Eric V.
Harrison, Fiona A.
Hong, Jaesub
Date Issued
November 2013
Journal
The Astrophysical Journal. Letters
Publisher
IOP Publishing
Citation
Nynka, Melania, Charles J. Hailey, Kaya Mori, Frederick K. Baganoff, Franz E. Bauer, Steven E. Boggs, William W. Craig, et al. “HIGH-ENERGY X-RAYS FROM J174545.5-285829, THE CANNONBALL: A CANDIDATE PULSAR WIND NEBULA ASSOCIATED WITH Sgr A EAST.” The Astrophysical Journal 778, no. 2 (November 13, 2013): L31. © 2013 The American Astronomical Society
Version
Final published version
Abstract
We report the unambiguous detection of non-thermal X-ray emission up to 30 keV from the Cannonball, a few-arcsecond long diffuse X-ray feature near the Galactic Center, using the NuSTAR X-ray observatory. The Cannonball is a high-velocity (v [subscript proj] ~ 500 km s[superscript –1]) pulsar candidate with a cometary pulsar wind nebula (PWN) located ~2' north-east from Sgr A*, just outside the radio shell of the supernova remnant Sagittarius A (Sgr A) East. Its non-thermal X-ray spectrum, measured up to 30 keV, is well characterized by a Γ ~ 1.6 power law, typical of a PWN, and has an X-ray luminosity of L(3-30 keV) = 1.3 × 10[superscript 34] erg s[superscript –1]. The spectral and spatial results derived from X-ray and radio data strongly suggest a runaway neutron star born in the Sgr A East supernova event. We do not find any pulsed signal from the Cannonball. The NuSTAR observations allow us to deduce the PWN magnetic field and show that it is consistent with the lower limit obtained from radio observations.
MIT Department
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.1088/2041-8205/778/2/l31
