IPs

V455 And
V515 And
AE Aqr
FO Aqr
XY Ari
V405 Aur
V647 Aur
HT Cam
MU Cam
DW Cnc
BG CMi
V709 Cas
V1033 Cas
V1025 Cen
TV Col
TX Col
UU Col
V2069 Cyg
V2306 Cyg
YY Dra
PQ Gem
V418 Gem
DQ Her
V1323 Her
EX Hya
NY Lup
V2400 Oph
V2731 Oph
V598 Peg
GK Per
AO Psc
V667 Pup
WX Pyx
V1223 Sgr
CC Scl
V1062 Tau
EI UMa
AX J1740.1
AX J1740.2
AX J1853.3
IGR J08390
IGR J15094
IGR J16500
IGR J16547
IGR J17195
IGR J18173
IGR J18308
IGR 19267
RX J2133

Full Catalog

Related Systems

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Related Systems

Asynchronous Polars

BY Cam, V1500 Cyg, CD Ind, and V1432 Aql are asynchronous polars. Although the spin and orbital periods are different in these systems, the differences are small (of order 1% or less), and they are thought to be in a state of temporary asynchronism. Therefore, I will treat them differently from IPs, in which the spin periods are generally thought to be near the equilibrium values.

V471 Tau

There is no doubt this is a binary consisting of a red dwarf and a white dwarf, and the latter is undoubtedly asynchronously rotating and magnetic. However, accretion appears to be sporadic, at an extremely low level, or both. I prefer to define IPs such that only systems in which accretion usually provides a measurable fraction of the luminosity are included.

Z And

The coherent 25 min period found in this system appears convincing (although we could always use confirmation). I do not include this system because it is an symbiotic star with an M giant mass donor.


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Please send your comments, suggestions etc. to Koji.Mukai@nasa.gov and/or Koji.Mukai@umbc.edu
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