DETECTION OF AN X-RAY PULSATION FOR THE GAMMA-RAY PULSAR CENTERED IN CTA 1

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50705

Title:	DETECTION OF AN X-RAY PULSATION FOR THE GAMMA-RAY PULSAR CENTERED IN CTA 1
Authors:	Lin,LCC;Huang,RHH;Takata,J;Hwang,CY;Kong,AKH;Hui,CY
Contributors:	天文研究所
Keywords:	SUPERNOVA REMNANT CTA-1;GEMINGA PULSAR;INTERSTELLAR-MEDIUM;EMISSION;RADIATION;SEARCHES;SIGNALS;RADIO;MODEL;EGRET
Date:	2010
Issue Date:	2012-03-27 18:08:21 (UTC+8)
Publisher:	國立中央大學
Abstract:	We report the detection of X-ray pulsations with a period of similar to 315.87 ms from the 2009 XMM-Newton observation for the radio-quiet gamma-ray pulsar, LAT PSR J0007+7303, centered in the supernova remnant CTA 1. The detected pulsed period is consistent with the gamma-ray periodicity at the same epoch found with the Fermi Gamma-ray Space Telescope. The broader sinusoidal structure in the folded light curve of the X-ray emission is dissimilar to that of the gamma-ray emission, and the phase of the peak is about 0.5 shifting from the peak in the gamma-ray bands, indicating that the main component of the X-rays originates from different sites of the pulsar. We conclude that the main component of the X-ray pulsation is contributed by the thermal emission from the neutron star. Although with a significantly different characteristic age, PSR J0007+7303 is similar to Geminga in emission properties of X-rays and gamma-rays; this makes PSR J0007+7303 the second radio-quiet gamma-ray pulsar with detected X-ray pulsations after Geminga.
Relation:	ASTROPHYSICAL JOURNAL LETTERS
Appears in Collections:	[Graduate Institute of Astronomy] journal & Dissertation

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