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PRODID:-//Heidelberg University//HePhySTO//EN
CALSCALE:GREGORIAN
BEGIN:VEVENT
DTEND:20260528T101500Z
UID:f8ace5af5aaa1e3b3718cf8871fdde29@physik.uni-heidelberg.de
DTSTAMP:20260411T182314Z
LOCATION:ARI\, Moenchhofstrasse 12-14\, Seminarraum 1.OG
DESCRIPTION:Microlensing has long been a powerful tool for studying dark ob
 jects\, but its full potential has yet to be unlocked. Typically\, informat
 ion about the lens comes solely from the light curve\, which is subject to 
 strong degeneracies. In addition to increasing the observed brightness of t
 he background star\, microlensing also produces tiny shifts in its apparent
  position — a phenomenon known as astrometric microlensing. This effect can
  break degeneracies and\, crucially\, allows for direct measurement of the 
 lens mass. Thanks to recent advances in astrometry\, detecting these subtle
  shifts is now becoming possible.\nUntil now\, astrometric microlensing has
  yielded only a handful of detections\, which required expensive\, targeted
  follow-up. This year\, the field will reach two major milestones. The Roma
 n Space Telescope\, the first space mission designed for microlensing obser
 vations\, is set to launch this autumn. Later in the year\, Gaia Data Relea
 se 4 will\, for the first time\, provide astrometric time-series data for n
 early two billion sources. These new datasets will finally make it possible
  to build a systematic census of isolated dark stellar remnants in the Milk
 y Way.\nUsing detailed simulations\, we have explored how to identify dark 
 remnants\, optimize the use of observation and analysis resources\, and ext
 ract masses from astrometric signals. I will discuss these efforts and show
 case the exciting developments that lie ahead in 2026.\n\nImported from htt
 ps://www.physik.uni-heidelberg.de/hephysto/ (no warranty for accuracy).
URL;VALUE=URI:https://www.physik.uni-heidelberg.de/hephysto/index.php?s=tal
 k&id=12569
SUMMARY:ARI Institute Colloquium: Zofia Kaczmarek - The secret lives of iso
 lated stellar remnants
DTSTART:20260528T091500Z
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