SIMBAD references

2010MNRAS.402L..16K - Mon. Not. R. Astron. Soc., 402, L16-L20 (2010/February-2)

Very long-term X-ray variations in LMXBs: solar cycle-like variations in the donor ?

KOTZE M.M. and CHARLES P.A.

Abstract (from CDS):

Long-term monitoring of Low Mass X-ray Binaries (LMXBs) by the All Sky Monitor on board the Rossi X-ray Timing Explorer now covers ∼13yr and shows that certain LMXB types display very long-term (approximately several to tens of years) quasi-periodic modulations. These time-scales are much longer than any `super-orbital' periods reported hitherto and likely have a different origin. We suggest here that they are due to long-term variations in the mass-transfer rate from the donor, which are a consequence of solar-like magnetic cycles that lead to Porb changes (as proposed by Richman, Applegate & Patterson for similar long-term variations in cataclysmic variables). Atoll sources display much larger amplitude modulations than Z sources over these time-scales, presumably because Z sources are Eddington limited and hence unable to respond as readily as Atoll sources to fluctuations in the mass-transfer rate from the donor.

Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): accretion, accretion discs - binaries: close - stars: magnetic fields - stars: neutron - novae, cataclysmic variables - X-rays: binaries

Simbad objects: 44

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2020.09.22-12:33:08

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