BEGIN:VCALENDAR VERSION:2.0 PRODID:-//jEvents 2.0 for Joomla//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VTIMEZONE TZID:Australia/Sydney BEGIN:STANDARD DTSTART:20150405T020000 RDATE:20151004T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20160403T020000 RDATE:20161002T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20170402T020000 RDATE:20171001T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20180401T020000 RDATE:20181007T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD BEGIN:STANDARD DTSTART:20190407T020000 RDATE:20191006T030000 TZOFFSETFROM:+1100 TZOFFSETTO:+1000 TZNAME:Australia/Sydney AEST END:STANDARD 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:20141209T193000 RDATE:20150405T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20151004T030000 RDATE:20160403T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20161002T030000 RDATE:20170402T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20171001T030000 RDATE:20180401T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20181007T030000 RDATE:20190407T020000 TZOFFSETFROM:+1000 TZOFFSETTO:+1100 TZNAME:Australia/Sydney AEDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20191006T030000 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:a96548175379fb20cfd5ef36f567678d CATEGORIES:Guest Speaker Night CREATED:20151103T111653 SUMMARY:Special Guest Speaker - Sue Knight LOCATION:Green Point Observatory DESCRIPTION:The Search for Cool Companions Around White Dwarf Stars\nSue KnightSue Knig ht has been a member of SASI since 1998. She was actively involved as the s ociety’s web administrator and Committee member. Sue also arranged the mont hly Guest Speaker talks, participated as a volunteer at the annual Open Nig hts and has written several articles for the society’s journal.\nAs an Info rmation Technology specialist for many years, Sue decided to change career direction, after attending several astronomy conferences worldwide. She com pleted studies toward a Bachelor of Science degree at Macquarie University in 2011 and is finalizing the next stage of her studies at Leicester Univer sity in the UK. Her research was focused on the search of companions to whi te dwarf stars in the infrared regime using Spitzer Telescope data.\nSue is an enthusiastic traveller and photographer as well as an avid reader of sc ience fiction novels.\nWe're looking forward to hear about Sue's research:\ nThe Search for Substellar Common Proper Motion Companions to White DwarfsA large sample of white dwarfs within our solar neighbourhood has been exami ned to search for resolved common proper motion companions. The luminosity of these white dwarfs make them ideal candidates for detecting low mass obj ects such as brown dwarfs and gas giant planets. Ultra cool brown dwarfs ar e particularly interesting due to their scarcity and they provide a crucial link between the colder gas giant planets and hotter T spectral type brown dwarfs. Furthermore, searching for brown dwarfs can also place constraints on the frequency of planetary systems around white dwarf progenitors. They also offer a unique opportunity to test properties predicted for them by a tmospheric models. I discuss my research and findings on the search for the se widely separated companions using data from the Spitzer Telescope data a s well the difficulty in distinguishing between brown dwarfs and extrasolar planets to date. X-ALT-DESC;FMTTYPE=text/html:

The Search for Cool C ompanions Around White Dwarf Stars

Sue Knight

Sue KnightSue Kni ght has been a member of SASI since 1998. She was actively involved as the society’s web administrator and Committee member. Sue also arranged t he monthly Guest Speaker talks, participated as a volunteer at the annual O pen Nights and has written several articles for the society’s journal .

As an Information Technology specialist for many years, Sue decided to change career direction, after attending several astronomy conferences worldwide. She completed studies toward a Bachelor of Science degree at Mac quarie University in 2011 and is finalizing the next stage of her studies a t Leicester University in the UK. Her research was focused on the search of companions to white dwarf stars in the infrared regime using Spitzer Teles cope data.

Sue is an enthusiastic traveller and photographer as well as an avid reader of science fiction novels.

We're looking forward to hear about Sue's research:

The Search for Substellar Common Proper Motion Companions to White Dwarfs< /h4>
A large sample of white dwarfs within ou r solar neighbourhood has been examined to search for resolved common prope r motion companions. The luminosity of these white dwarfs make them ideal c andidates for detecting low mass objects such as brown dwarfs and gas giant planets.
 
Ultra cool brown dwarfs are particularly interesting due to their scarcity and they provide a crucial link between the colder gas giant plane ts and hotter T spectral type brown dwarfs.
 
Furthermore, searching for brown dwarfs can also place constraints on the frequency of planetary systems ar ound white dwarf progenitors. They also offer a unique opportunity to test properties predicted for them by atmospheric models.
 
I discuss my research a nd findings on the search for these widely separated companions using data from the Spitzer Telescope data as well the difficulty in distinguishing be tween brown dwarfs and extrasolar planets to date.
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