Martino, Marelli., Daniele, Pizzocaro., Andrea De, Luca., Fabio, Gastaldello., Patrizia, Caraveo., Pablo Saz, Parkinson. The Tale of the Two Tails of the Oldish PSR J2055+2539, 2016, The Astrophysical Journal, 819, 40

Martino, Marelli., Daniele, Pizzocaro., Andrea De, Luca., Fabio, Gastaldello., Patrizia, Caraveo., Pablo Saz, Parkinson. The Tale of the Two Tails of the Oldish PSR J2055+2539, 2016, The Astrophysical Journal, 819, 40

ADS: The Astrophysical Journal, 819, 40 (2016)

iopscience: doi:10.3847/0004-637X/819/1/40

 

Abstract
We analyzed a deep XMM-Newton observation of the radio-quiet γ-ray PSR J2055+2539. The spectrum of the X-ray counterpart is nonthermal, with a photon index of Γ = 2.36 ± 0.14 (1σ confidence). We detected X-ray pulsations with a pulsed fraction of 25% ± 3% and a sinusoidal shape. Taking into account considerations on the γ-ray efficiency of the pulsar and on its X-ray spectrum, we can infer a pulsar distance ranging from 450 to 750 pc. We found two different nebular features associated with PSR J2055+2539 and protruding from it. The angle between the two nebular main axes is ~162fdg8 ± 0fdg7. The main, brighter feature is 12′ long and <20” thick, characterized by an asymmetry with respect to the main axis that evolves with the distance from the pulsar, possibly forming a helical pattern. The secondary feature is 250” × 30”. Both nebulae present an almost flat brightness profile with a sudden decrease at the end. The nebulae can be fitted by either a power-law model or a thermal bremsstrahlung model. A plausible interpretation of the brighter nebula is in terms of a collimated ballistic jet. The secondary nebula is most likely a classical synchrotron-emitting tail.

Martino, Marelli., Daniele, Pizzocaro., Andrea De, Luca., Fabio, Gastaldello., Patrizia, Caraveo., Pablo Saz, Parkinson. The Tale of the Two Tails of the Oldish PSR J2055+2539, 2016, The Astrophysical Journal, 819, 40

Ajello, M., (Authors)., Saz Parkinson, P. M., (Authors)., Zimmer, S. Fermi-LAT Observations of High-Energy Gamma-Ray Emission toward the Galactic Center, 2016, The Astrophysical Journal, 819, 44

Saz Parkinson, P. M., Xu, H., Yu, P. L. H., Salvetti, D., Marelli, M., Falcone, A. D. Classification and Ranking of Fermi LAT Gamma-ray Sources from the 3FGL Catalog using Machine Learning Techniques, 2016, The Astrophysical Journal, 820, 8

Kwok, S. Complex organics in space from Solar System to distant galaxies, 2016, The Astronomy and Astrophysics Review, 24, 8

M. Ackermann., (Authors)., Saz Parkinson, P. M., (Authors)., S. Zimmer. 2FHL: The Second Catalog of Hard Fermi-LAT Sources, 2016, The Astrophysical Journal Letters, 222, 5

Zhang, Yong., Zhang, Bing., Liu, Xiao-Wei. On the Nonthermal κ-distributed Electrons in Planetary Nebulae and H II Regions: The κ Index and Its Correlations with Other Nebular Properties, 2016, The Astrophysical Journal, 817, 9

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