IPs

AE Aqr
FO Aqr
XY Ari
V405 Aur
HT Cam
MU Cam
DW Cnc
BG CMi
V709 Cas
V1025 Cen
TV Col
TX Col
UU Col
V2306 Cyg
YY Dra
PQ Gem
DQ Her
EX Hya
NY Lup
V2400 Oph
GK Per
AO Psc
WX Pyx
V1223 Sgr
V1062 Tau
EI UMa
IGR 00234
IGR 15094
IGR 17303
Swift J0732
RX J0704
RX J1803
RX J2133
XSS 00564

Full Catalog

Related Systems

Polarization of IPs

This is not the case in IPs - there are no reports of cyclotron humps or Zeeman-split features. Polarization has been detected in 6 or so systems, however, allowing some constraints to be set on the magnetic field strengths. Unfortunately, the analysis is more complicated because any cyclotron emission can be diluted by unpolarized emissions from the partial accretion disk, the bright spot, and the irradiated disk/bright spot/secondary.

Wickramasinghe et al. 1991 suggest non-detection of polarization suggests B < 5 MG. If this is confirmed, then there are quite a few IPs with magnetic fields weaker than known polars, and hence will not evolve into polars. There are a few IPs that will.

Survey and Non-system-specific Modelling

• Butters et al. 2009: In addition to 1RXS J213344.1+510725 reported earlier, IGR J17303-0601 is found to show significant, spin-modulated circular polarization. shows little evidence of polarization, while FO Aqr, V2306 Cyg, DQ Her, AO Psc, and V1223 Sgr show some evidence of poliarization.

• Stockman et al. 1992: 4-sigma result on AE Aqr, 3-sigma result on FO Aqr, and non-detections of TV Col, YY Dra, DQ Her, EX Hya, GK Per, and AO Psc.

• Wickramasinghe et al. 1991: non-detection of polarized light suggests B < 5 MG

Detections

• AE Aqr (see also the 4-sigma result in Stockman et al. 1992)
  • Ikhsanov et al. 2002
  • Szkody et al. 1982
• V405 Aur (only publication on this is this IAUC?)
  • Shakhovskoj & Kolesnikov 1997
• BG CMi (B ~ 6 MG)
  • Chanmugam et al. 1990
  • Penning et al. 1986
  • West et al. 1987
• V2306 Cyg
  • Norton et al. 2002
  • Uslenghi et al. 2001
• PQ Gem (9-21 MG)
  • Howell et al. 1997
  • Piirola et al. 1993
  • Potter et al. 1997
  • Rosen et al. 1993
  • Somov et al. 1998
• V2400 Oph (9-20 MG? 27 MG?)
  • Buckley et al. 1995
  • Vaeth 1997
• RX J2133.7+5107 (magnetic moment of 3x10³³-3x10³⁴)
  • Katajainen et al. 2007

Upper Limits

• FO Aqr (see also the 3-sigma result in Stockman et al. 1992)
  • Penning et al. 1986
  • Berriman et al. 1986
• TV Col
  • Penning et al. 1986
• V1223 Sgr
  • Watts et al. 1985