BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//ZContent.net//ZapCalLib 1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20121009T123000
DTEND;TZID=Atlantic/Canary:20121009T133000
UID:iactalks-409
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/409
CREATED:2012-10-09T12:30:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:A new L-dwarf member of the moderately metal poor triple system HD 
 221356
DESCRIPTION:A new L-dwarf member of the moderately metal poor triple system
  HD 221356\nMr. Bartek Gauza\n\nWe report on the discovery of a fourth com
 ponent in the HD 221356 star  system, previously known to be formed by an 
 F8V, slightly metal-poor  primary ([Fe/H]= -0.26), and a distant M8V+L3V p
 air. In our ongoing  common proper motion search based on VISTA Hemisphere
  Survey (VHS) and  2MASS catalogues, we have detected a faint (J = 13.76 &
 plusmn; 0.04 mag)  co-moving companion of the F8 star located at a project
 ed distance of  ~312 AU. Near-infrared spectroscopy of the new companion i
 ndicates an  L1±1 spectral type. Using evolutionary models the mass
  of the new  companion is estimated at ~0.08 solar masses, which places th
 e object  close to the stellar-substellar borderline. This multiple system
   provides an interesting example of objects with masses slightly above  a
 nd below the hydrogen burning mass limit.
END:VEVENT
END:VCALENDAR