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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20131219T103000
DTEND;TZID=Atlantic/Canary:20131219T113000
UID:iactalks-573
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/573
CREATED:2013-12-19T10:30:00+00:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Physical conditions of starburst galaxies from LMT 3-mm spectra  
DESCRIPTION:Physical conditions of starburst galaxies from LMT 3-mm spectra
   \nDr. Daniel Rosa\n\nI will present the first Large Millimiter Telescope
  spectra of 4 nearby galaxies with known high star formation rates. The in
 dividual spectra were acquired with the Redshift Search Receiver, a 3 mm s
 pectrograph that covers simultaneously the 3 mm band from 75 to 110 GHz. T
 he spectra show rms temperatures of around 4 mK that allow us to detect no
 t only common molecular species such as CO, HCN, HCO+, HCN, 13CO reported 
 widely in the literature but also other more rare molecular transitions (H
 C3N, CN, CH3OH, CH3C2H) and even Hydrogen recombination lines (from H39alp
 ha to H42alpha). We are making use of theoretical radiative transfer model
 s to analize these spectra in order to understand the variations of the ob
 served line ratios of different lines in galaxies classified as ultralumin
 ous infrared galaxies where the star formation rate may be as high as 100 
 solar masses per year. These data will help to understand the physical con
 ditions of the gas in regions that are forming stars very efficiently. The
  observed line ratios in star forming galaxies are also compared to those 
 galaxies that is known to contain an AGN.
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