BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//ZContent.net//ZapCalLib 1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20121002T123000
DTEND;TZID=Atlantic/Canary:20121002T133000
UID:iactalks-406
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/406
CREATED:2012-10-02T12:30:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:The Sigma Orionis cluster: from 20 Msun to free-floating planets 
DESCRIPTION:The Sigma Orionis cluster: from 20 Msun to free-floating planet
 s \nDr. Karla Peña Ramírez\n\nFor the first time, we present the low-mas
 s function of the entire young star cluster Sigma Orionis (3 Myr, 352 pc, 
 no internal extinction) from 0.25 Msun through the brown dwarf regime down
  to 3-4  Mjup in the planetary-mass domain. We have used VISTA Orion data 
 (ZYJHKs) in  the magnitude interval J= 13 - 21 mag (completeness at J = 21
 .0 mag, Z =   22.6 mag, and 10 Mjup). Combined with Spitzer/IRAC (3.6 and 
 4.5 micron) and optical images (Iz-band) from our archives has allowed us 
 to  identify over 200 cluster low-mass member candidates in an area of  0.
 79 deg2, i.e., uncovering most of the cluster area. All of these objects h
 ave  colors compatible with spectral types M, L, and T, i.e., Teff = 3000-
 1000 K. 23  of them are new planetary mass candidates in the Sigma Orionis
  cluster,  thus doubling the number of cluster planetary mass objects know
 n so  far. By considering the Mayrit catalog, we have "extended" our mass 
  function from 0.25 Msun up to the high-mass stars (O-type) of the cluster
 , covering  four orders of magnitude in mass.
END:VEVENT
END:VCALENDAR