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SUMMARY:Breaking news from high-mass star formation: recent VLBI contribut
 ions
DTSTART;VALUE=DATE-TIME:20240905T070000Z
DTEND;VALUE=DATE-TIME:20240905T073000Z
DTSTAMP;VALUE=DATE-TIME:20260307T082510Z
UID:indico-contribution-24@cern.ch
DESCRIPTION:Speakers: Dr. SURCIS\, Gabriele (INAF - Osservatorio Astronomi
 co di Cagliari)\nThe formation process of high-mass stars (M > 8 Msun) is 
 still unclear\; this is mainly due to their fast evolution and large dista
 nces that make it very difficult to observe them in detail. However\, many
  observational and theoretical efforts have been made in the last decades 
 that have shed light on some aspects of the formation process. For instanc
 e\, it has been shown that molecular outflows are essential during the for
 mation process as much as the accretion disks\, similarly to what happens 
 during the formation of low-mass stars. Furthermore the magnetic field is 
 considered playing an important role in the formation of massive young ste
 llar objects (YSOs)\, for instance in launching and shaping molecular outf
 lows.\nI will briefly highlight some of the most recent results in the fie
 ld\, focusing mainly on those obtained through the VLBI. In particular\, I
  will spend some time showing the results obtained with the EVN toward the
  high-mass star-forming region W75N(B). Several radio sources have been de
 tected in this region\, among them the massive YSOs VLA 1 and VLA 2 are th
 ought to be in different evolutionary stages. In particular\, VLA 1 is at 
 the early stage of the photoionization and it is driving a thermal radio j
 et\, while VLA 2 is a thermal\, collimated ionized wind surrounded by a du
 sty disk or envelope. The 22 GHz water masers around both VLA 1 and VLA 2 
 have been monitored\, in polarimetric mode\, over a period of six years wi
 th the EVN. A complete picture of the region will be presented\, including
  the most recent ALMA results.\n\nhttps://events.mpifr-bonn.mpg.de/indico/
 event/371/session/13/contribution/24
LOCATION:CJD Bonn Castell
URL:https://events.mpifr-bonn.mpg.de/indico/event/371/session/13/contribut
 ion/24
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