| タイトル | On the Puzzling High-Energy Pulsations of the Energetic Radio-Quiet -Ray Pulsar J1813-1246 |
| 本文（外部サイト） | http://hdl.handle.net/2060/20150004146 |
| 著者（英） | Salvetti, D.; De Luca, A.; Harding, Alice K.; Marelli, M.; Wood, K. S.; Acero, F.; Parkinson, P. M.; Caraveo, P.; Pizzocaro, D. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2014-10-28 |
| 言語 | eng |
| 内容記述 | We have analyzed the new deep XMM-Newton and Chandra observations of the energetic, radio-quiet pulsar J18131246. The X-ray spectrum is nonthermal, very hard, and absorbed. Based on spectral considerations, we propose that J1813 is located at a distance further than 2.5 kpc. J1813 is highly pulsed in the X-ray domain, with a light curve characterized by two sharp, asymmetrical peaks, separated by 0.5 in phase. We detected no significant X-ray spectral changes during the pulsar phase.We extended the available Fermi ephemeris to five years.We found two glitches. The gamma-ray light curve is characterized by two peaks, separated by 0.5 in phase, with a bridge in between and no off-pulse emission. The spectrum shows clear evolution in phase, being softer at the peaks and hardening toward the bridge. Surprisingly, both X-ray peaks lag behind the gamma-ray ones by a quarter of phase. We found a hint of detection in the 30-500 keV band with INTEGRAL, which is consistent with the extrapolation of both the soft X-ray and gamma-ray emission of J1813. The unique X-ray and gamma-ray phasing suggests a singular emission geometry. We discuss some possibilities within the current pulsar emission models. Finally, we develop an alternative geometrical model where the X-ray emission comes from polar cap pair cascades. |
| NASA分類 | Astrophysics |
| レポートNO | GSFC-E-DAA-TN21402 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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