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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20091120T000000
DTEND;TZID=Atlantic/Canary:20091120T010000
UID:iactalks-125
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/125
CREATED:2009-11-20T00:00:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Optical and NIR studies of short period low mass X-ray binaries (LM
 XB)
DESCRIPTION:Optical and NIR studies of short period low mass X-ray binaries
  (LMXB)\nDr. Pasi Hakala\n\nI present some recent results from our Optical
  and NIR studies of five short period low-mass X-ray binaries (LMXB's; X18
 22-371, X1957+115, UW CrB, X1916-05 and X0614+091). Optical photometry and
  spectroscopy reveal some surprising results on the geometry and evolution
  of accretions discs in LMXB's. Based on our data, it is increasingly clea
 r that accretion discs in these systems are far from being stable and must
  undergo substantial precession and/or warping behaviour on timescales les
 s than a day in case of the shortest period systems.
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