The Intermediate Polars
Welcome to the Intermediate Polar Home Page, Version 2!
Sixty-four of seventy-one Ironclad or Confirmed IPs are shown above in a Porb-Pspin diagram (see the list sorted by the Porb/Pspin ratio). Symbols: Open Square for the diskless system V2400 Oph, Diamonds for the propeller systems AE Aqr and LAMOST J024048.51+195226.9, and Circles for the rest. The vertical dashed lines show the approximate location of the period gap, while diagonal lines are for Porb=Pspin (solid) and Porb=10xPspin (dashed). Also see the note on the accretion modes of IPs.
See the full catalog, Version 2021 of IPs and IP candidates, updated on 2021 December 30.
Please send your comments, suggestions etc. to Koji.Mukai@nasa.gov and/or Koji.Mukai@umbc.edu