BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//ZContent.net//ZapCalLib 1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20131205T103000
DTEND;TZID=Atlantic/Canary:20131205T113000
UID:iactalks-567
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/567
CREATED:2013-12-05T10:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:How does the group environment hamper star-formation in star-formin
 g galaxies?  
DESCRIPTION:How does the group environment hamper star-formation in star-fo
 rming galaxies?  \nDr. Sandesh Kulkarni\n\n How does the group enviro
 nment hamper star-formation in star-forming  galaxies?\nAbstract:   We pre
 sent the first results from the H-alpha Galaxy Groups Imaging Survey  (HAG
 GIS), a narrow-band imaging survey of SDSS groups at z < 0.05  conducte
 d using the Wide Field Imager (WFI) on the ESO/MPG 2.2 meter  telescope an
 d the Wide Field Camera (WFC) on the Issac Newton Telescope  (INT). In tot
 al, we observed 100 galaxy groups with wide range of halo  mass 10^12 - 10
 ^14 M_sun in pairs of narrow-band filters selected to get  continuum subtr
 acted rest-frame H-alpha images for each galaxy in these  groups. The exce
 llent data allows us to detect H-alpha down to the 10^(-18)  ergs/s/cm^2/a
 rcsec^2 level. Here, we examine the role played by halo mass  and galaxy s
 tellar mass in deciding the overall star formation activity in  star formi
 ng disks by comparing stacked H-alpha profiles of galaxies in  different h
 alo mass and stellar mass bins. With this preliminary study, we  have foun
 d that the star-formation activity in star-forming galaxies  decreases in 
 larger halos compared to the field galaxies. Using median  equivalent widt
 h profiles, we can infer how environmental processes affect  star-forming 
 galaxies differently at different radii.
END:VEVENT
END:VCALENDAR