Query : 2001A&A...374..584B

2001A&A...374..584B - Astronomy and Astrophysics, volume 374, 584-587 (2001/8-1)

Spectroscopy of the Crab Pulsar.


Abstract (from CDS):

We present new, high signal-to-noise spectroscopy of the Crab Pulsar in the range λλ5000-7000Å. 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 α=-0.15±0.15. 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 λ6000Å, possibly of ion-cyclotron origin, as detected by Nasuti et al. (1996A&A...314..849N). 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.

Abstract Copyright:

Journal keyword(s): stars: pulsars: individual (Crab Pulsar) - pulsars: general - stars: neutron

CDS comments: Object PG 129b not identified. In ref list : Oke 1990AJ.99.1621O instead of 1977AJ.99.1621O.

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
1 V* CM Tau Psr 05 34 31.93830 +22 00 52.1758           ~ 4924 1
2 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5789 4

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