Volume 374, Number 2, August I 2001
|Page(s)||584 - 587|
|Section||Interstellar and circumstellar matter|
|Published online||15 August 2001|
Spectroscopy of the Crab Pulsar
Special Astrophysical Observatory, Nizhnij Arkhyz, Karachaevo-Cherkesia, 369167, Russia
2 Isaac Newton Institute of Chile, SAO Branch, Chile
3 Department of Astronomy and Mechanics, Udmurt State University, 1, Universitetskaia, Izhevsk, 426034, Russia e-mail: email@example.com
Corresponding author: G. Beskin, firstname.lastname@example.org
Accepted: 7 May 2001
We present new, high signal-to-noise spectroscopy of the Crab Pulsar in the range Å. The observations were carried out with the 6-meter telescope of the SAO with the spectrograph SP-124 with a resolution of 2 Å. After reduction of the Crab Nebula emission, the dereddened pulsar spectrum can be fitted by a power law with . There are no lines (emission and absorption) with a relative intensity (depth) of more than 2% (with a confidential probability of 99% ). At this level we did not find absorption at Å, possibly of ion-cyclotron origin, as detected by Nasuti et al. ([CITE]). This detail can be variable as a consequence of the variability of the ion ejection from the neutron star (NS) surface. We suggest a possible relationship between ejection intensity and inhomogeneity of the NS surface connected with pulsar glitches.
Key words: stars: pulsars: individual (Crab Pulsar); pulsars: general / stars: neutron
© ESO, 2001
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