BEGIN:VCALENDAR VERSION:2.0 PRODID:-//jEvents 2.0 for Joomla//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VTIMEZONE TZID:Australia/Sydney BEGIN:STANDARD DTSTART:20200405T020000 RDATE:20201004T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20210404T020000 RDATE:20211003T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20220403T020000 RDATE:20221002T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20230402T020000 RDATE:20231001T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20240407T020000 RDATE:20241006T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20250406T020000 RDATE:20251005T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20260405T020000 RDATE:20261004T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20270404T020000 RDATE:20271003T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20280402T020000 RDATE:20281001T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:DAYLIGHT DTSTART:20191105T193000 RDATE:20200405T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20201004T030000 RDATE:20210404T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20211003T030000 RDATE:20220403T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20221002T030000 RDATE:20230402T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20231001T030000 RDATE:20240407T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20241006T030000 RDATE:20250406T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20251005T030000 RDATE:20260405T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20261004T030000 RDATE:20270404T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20271003T030000 RDATE:20280402T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20281001T030000 RDATE:20290401T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT UID:9bad03a29df7972e642ca21db1662ca0 CATEGORIES:Guest Speaker Night CREATED:20191130T162954 SUMMARY:Guest Speaker - Dr Ian Kemp (ICRAR, ASNSW) LOCATION:Online Meeting DESCRIPTION:Searching for ripples in the cosmic Niagara Falls: Cataclysmic Variable Sta rsThis talk is about “UGSU cataclysmic variables” - one of the most interes ting species in the variable star zoo (in my opinion). They’re actually not variable stars at all, because they are binary systems, in which a red sta r spills material onto a white dwarf, giving rise to periodic massive erupt ions which can brighten the star from mag 15 to mag 9, easily within the ra nge of a backyard telescope. They are very important systems in astronomy, because they are the precursors of the type 1a supernovae, which are used t o measure the Hubble-Lemaître constant, and the accelerating expansion of t he universe. The light curves of these systems are very interesting - they show ‘wobbles’ which reveal a lot of what’s going on in the binary system a nd the accretion disk. Last year, I observed a southern sky system called V W Hyi, which was first characterised by astronomers from New Zealand and Au stralia. In addition to the ‘usual’ variations - known as ’superhumps’, I f ound hints of a different type of variation, but the data were not conclusi ve enough to confirm it. So this year, with some partners in crime, I’m col lecting and analysing data on a number of similar systems to look for extra detail in the light curves of these interesting systems. If you are inspir ed by this talk you can join the hunt!\n \nDr Ian Kemp (ICRAR, ASNSW)starte d his professional life in academic research - with a degree, PhD and postd oc in Materials Science. He then went off to work in Industry and governmen t for a while (25 years) before getting back to research and obtaining a Ma sters degree in Astronomy. He currently works as a research scientist at th e International Centre for Radio Astronomy Research (ICRAR) in Perth - work ing partly on ‘big data’ (i.e., extremely big, massive data) and partly on astrophysics research. https://www.icrar.org/people/ikemp/ (https://www.icr ar.org/people/ikemp/)\n X-ALT-DESC;FMTTYPE=text/html:

Searching for ripples in the cosmic Niagara Falls: Cataclysmic Variable Stars

This talk is about “UGSU cataclysmic variables” - one of the most interesting species in the variable star zoo (in my opinio n). They’re actually not variable stars at all, because they are bina ry systems, in which a red star spills material onto a white dwarf, giving rise to periodic massive eruptions which can brighten the star from mag 15 to mag 9, easily within the range of a backyard telescope. They are very im portant systems in astronomy, because they are the precursors of the type 1 a supernovae, which are used to measure the Hubble-Lemaître constant, and the accelerating expansion of the universe. The light curves of these systems are very interesting - they show ‘wobbles’ which reveal a lot of what’s going on in the binary system and the accretion disk . Last year, I observed a southern sky system called VW Hyi, which was firs t characterised by astronomers from New Zealand and Australia. In addition to the ‘usual’ variations - known as ’superhumps’, I found hints of a different type of variation, but the data were not concl usive enough to confirm it. So this year, with some partners in crime, I&rs quo;m collecting and analysing data on a number of similar systems to look for extra detail in the light curves of these interesting systems. If you a re inspired by this talk you can join the hunt!

 

Dr Ian Kemp (ICRAR, ASNSW)Ian Kemp

s tarted his professional life in academic research - with a degree, PhD and postdoc in Materials Science. He then went off to work in Industry and gove rnment for a while (25 years) before getting back to research and obtaining a Masters degree in Astronomy. He currently works as a research scientist at the International Centre for Radio Astronomy Research (ICRAR) in Perth - working partly on ‘big data’ (i.e., extremely big, massive dat a) and partly on astrophysics research. https://www.icrar.org/people/ikemp/

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