BEGIN:VCALENDAR VERSION:2.0 PRODID:-//ZContent.net//ZapCalLib 1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VEVENT DTSTART;TZID=Atlantic/Canary:20150226T103000 DTEND;TZID=Atlantic/Canary:20150226T113000 UID:iactalks-758 X-WR-CALNAME: IAC Talks: Open Astronomy Seminars X-ORIGINAL-URL: /iactalks/Talks/view/758 CREATED:2015-02-26T10:30:00+00:00 X-WR-CALDESC: IAC Talks upcomming talks SUMMARY:Rare dusty galaxies in the early Universe: Herschel unveils extreme star-formation DESCRIPTION:Rare dusty galaxies in the early Universe: Herschel unveils ext reme star-formation\nDr. Julie Wardlow\n\n \nOver the past ~20 years the high-redshift Universe has been increasingly opened to scrut iny at far-infrared wavelengths, where cool dust emission from s tar-formation dominates. The dusty star-forming galaxies (D SFGs) and submillimeter galaxies (SMGs), selected at these wavel engths likely represent an important, but short-lived phase in t he growth of massive galaxies. These DSFGs often have star- formation rates in excess of ~1000 solar masses per year and are confirmed out to at least z~6, although their redshifts an d high dust contents make them faint and difficult to study at other wavelengths. Now, using data from the Herschel Sp ace Observatory we have identified a population of DSFGs that ar e strongly gravitationally lensed and therefore magnified and av ailable for unprecedented multi-wavelength scrutiny. I will desc ribe how this important gravitationally lensed population is identified, and present and interpret the data from our extensive multi-wavelength, multi-facility follow-up studies. I will also present follow-up observations of an intriguing sample of the highest redshift DSFGs (z>4) that are also s elected via Herschel data, and that are proving troublesome to explain in galaxy formation simulations.\n  END:VEVENT END:VCALENDAR