The period-pulse-width distribution of pulsars and their division into three classes

Details The period-pulse-width distribution of pulsars and their division into three classes The period-pulse-width distribution of pulsars and their division into three classes

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...207..949r&link_type=abstract

Astrophysical Journal, vol. 207, Aug. 1, 1976, pt. 1, p. 949-961.

Astronomy and Astrophysics

Astrophysics

6

Pulsars, Pulse Duration, Stellar Models, Astronomical Catalogs, Classifications, Magnetic Poles, Maximum Likelihood Estimates, Neutron Stars, Polar Caps

Scientific paper

The period-pulse-width (P-W) distribution of sample of 41 pulsars has been reanalyzed under two versions of a model where radiation is beamed from magnetic polar caps which are isotropically oriented with respect to the rotation axis of the neutron stars (IOPC models). It is found that neither IOPC model can explain the P-W distribution of the entire sample. Pulsars with simple unimodal (U) or complicated multimodal (M) pulse shapes show significantly different P-W distributions. Class M pulsars have a narrower P-W distribution than do class U pulsars and, taken separately, are compatible with either IOPC model. Class U pulsars divide into two subgroups, those with relatively narrower pulses (UN) and those with relatively wider pulses (UW), each of which is compatible with either IOPC model. One interpretation of these results is that the pulsars in classes UN, M, and UW have different intrinsic beam sizes, roughly in the ratios 1:2:4, respectively. The possible origins of the three classes are discussed in terms of the force-balance magnetosphere model (Roberts et al., 1972, 1973), where the differences may be attributed to different-mass neutron stars and the structure of the polar caps. An alternative interpretation is that the angle between the rotation and emission axes is not isotropically distributed, but can take only certain preferred values.

Affiliated with

Also associated with

No associations

Rating

The period-pulse-width distribution of pulsars and their division into three classes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The period-pulse-width distribution of pulsars and their division into three classes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The period-pulse-width distribution of pulsars and their division into three classes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1872410