Low States and OutburstsSome IPs have shown occasional low states in archival plate photometry, but probably not as frequently as in AM Her type systems. What are they caused by, is it X-ray irradiation? IPs have stronger hard X-rays but the accretion disk would shield the secondary...
Several IPs have shown occasional, very short, outbursts. Several lines of evidence points to these being episodes of enhanced accretion rate from the secondary.
GK Per, an anomalous system in many respects, has very long outbursts, possibly related to the long orbital period of this system.
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