Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...189.9203e&link_type=abstract
American Astronomical Society, 189th AAS Meeting, #92.03; Bulletin of the American Astronomical Society, Vol. 28, p.1395
Astronomy and Astrophysics
Astronomy
Scientific paper
We have obtained high time-resolution (20 microsecond) near-infrared (1-2.5 micron) pulse profiles of the Crab Nebula pulsar using a new solid-state photomultiplier (SSPM)-based photometer on the Multiple Mirror Telescope. We augment these data with new analyses of X-ray (ROSAT HRI), gamma-ray (CGRO OSSE), and optical/ultraviolet (HST HSP) data to provide high time-resolution coverage over 7 decades of energy. We analyze the pulse shapes as a function of energy, and compare the results to predictions made by various pulsar emission models, including the 2-gap outer gap, the 1-gap outer gap, and the polar cap models. In particular, we examine the previusly unknown energy-dependent variations within the individual pulse profile peaks (with spectral changes on timescales <180 microseconds), the peak-to-peak phase separations, the global spectra of the various pulse components, and the previously unknown reversal of the shape of Peak 2 between the optical/infrared range and the X-ray/gamma-ray range. We find that while the models can fit the general features seen here, none of them predict many of the detailed phenomena we observe.
Eikenberry Stephen Scott
Fazio Giacomo
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