Radio Recombination Lines in the Milky Way Marina Berezina (Max Planck IfR )
description
Transcript of Radio Recombination Lines in the Milky Way Marina Berezina (Max Planck IfR )
Radio Recombination Lines in theMilky Way
Marina Berezina (Max Planck IfR)Kevin Hardegree-Ullman (Univ. of Toledo)
Yanina Metodieva (Univ. of Sofia)Amanda Kepley (NRAO, GBT)
Image Credits: www.otakupop.com, www.cv.nrao.edu
Based on HII Region Discovery Survey (HDRS)Bania, T.M. + (2010)
Radio Recombination Lines (RRLs)
• Used to measure distances to star forming regions in the Milky Way
• Combine with other observations to study dust and gas in young massive clusters
Radio Recombination Lines (RRLs)
• Electrons fall to lower levels within an atom and emit a photon
+
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Data Collection/Reduction• Observed 7 RRLs in 10 HII regions within the
galactic plane• Combined scans, baselined, fit Gaussian,
obtained VLSR
VLSR
Galactic Longitude (°)
V LSR (
km s-1
)
Dame, Hartmann, & Thaddeus (2001)
Future Analysis
• Compare to infrared emission• Learn more about star formation in the Milky
Way