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SUMMARY:Characterizing the distant spur feature of the Sagittarius stream
DTSTART;VALUE=DATE-TIME:20230320T093700Z
DTEND;VALUE=DATE-TIME:20230320T093900Z
DTSTAMP;VALUE=DATE-TIME:20240704T115711Z
UID:indico-contribution-238@meetings.aip.de
DESCRIPTION:Speakers: Manuel Bayer (Kapteyn Astronomical Institute\, Unive
 rsity of Groningen\, the Netherlands)\nProviding a detailed picture of the
  complexity of the Sagittarius stream is an important aspect of investigat
 ing the outer Galactic halo and constraining the Milky Way potential. Seve
 ral attempts have been made to model the complex structure of the Sagittar
 ius stream. However\, no model has yet been able to match all the intricat
 e features observed for the stream\, including for instance a bifurcation 
 and several wraps. Most recently\, it was discovered that the stream also 
 has a very distant spur feature at least out to ~120 kpc (Sesar et al.\, 2
 017). \n\nThe aim of this work is to characterize this Sagittarius stream 
 spur using blue horizontal branch stars\, one of the few standard candle t
 racers reaching these outer realms of the Milky Way. Blue horizontal branc
 h candidates were selected using a unique combination of narrow- and broad
 -band photometry as well as Gaia astrometry. Follow-up optical spectra are
  obtained using ESO/FORS2. The sample allows us to trace the structure to 
 even larger distances. The observed radial velocities of these stars discr
 iminate different model predictions for the origin of this mysterious spur
  feature.\n\nhttps://meetings.aip.de/event/20/contributions/238/
LOCATION:Haus H\, Telegrafenberg
URL:https://meetings.aip.de/event/20/contributions/238/
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