期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 755, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/755/1/L20
关键词
gamma rays: stars; ISM: individual objects (HESS J1841-055); pulsars: individual (PSR J1838-0537)
资金
- Max-Planck-Gesellschaft
- U.S. National Science Foundation [0970074, 1104902]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1104902] Funding Source: National Science Foundation
We report the discovery of PSR J1838-0537, a gamma-ray pulsar found through a blind search of data from the Fermi Large Area Telescope (LAT). The pulsar has a spin frequency of 6.9 Hz and a frequency derivative of -2.2 x 10 (11) Hz s (1), implying a young characteristic age of 4970 yr and a large spin-down power of 5.9 x 10(36) erg s(-1). Follow-up observations with radio telescopes detected no pulsations; thus PSR J1838-0537 appears radio-quiet as viewed from Earth. In 2009 September the pulsar suffered the largest glitch so far seen in any gamma-ray-only pulsar, causing a relative increase in spin frequency of about 5.5 x 10(-6). After the glitch, during a putative recovery period, the timing analysis is complicated by the sparsity of the LAT photon data, the weakness of the pulsations, and the reduction in average exposure from a coincidental, contemporaneous change in LAT's sky-survey observing pattern. The pulsar's sky position is coincident with the spatially extended TeV source HESS J1841-055 detected by the High Energy Stereoscopic System (H. E. S. S.). The inferred energetics suggest that HESS J1841-055 contains a pulsar wind nebula powered by the pulsar.
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