The Data

In particular, there is focus on the P/P-dot diagram that contains the data that shows the known set of radio pulsars, which include some isolated x-ray pulsars, along with some binary millisecond pulsars.

Since the conventional P/P-dot diagram only contains pulsars that are spinning down (pulsing slower with time), we describe how the spinning up pulsars can be used on a complementary negative P-dot graph that shows the spin up evolution similar to the main P/P-dot spin-down evolution.

In order to show the spin up evolution, data is presented from the binary x-ray pulsars Cen X-3 and Her X-1, plus additional data regarding the Be X-ray Binaries (BeXB’s).

Finally, consideration is given to how the millisecond pulsars (MSP’s), which are known to have either a slow spin-up property or a slow spin-down property and can appear on either the positive or negative half of the full P/P-dot diagram.Plus, there is a page discussing the concept of a Double Pulsar Binary (DPB).