The present-day structure of the Milky Way is a constraint on theories
of Galactic formation and evolution. HII regions, the zones of ionized
gas surrounding recently formed high-mass stars, are common tracers of structure in both the Milky Way and other galaxies. Over the past 10
years, we have more than doubled the number of known Galactic HII
regions by searching for radio recombination line emission toward
infrared-identified HII region candidates. I will discuss (1) our
latest project, the Southern HII Region Discovery Survey, (2) how we
can use our observations to derive the physical properties and
distances of the nebulae, and (3) what we are learning about the
morphological, kinematic, and chemical structure of the Milky Way with
a complete census of Galactic HII regions.
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2020-08-31T15:00:002020-08-31T16:00:00Revealing Structure in the Milky Way with Galactic HII RegionsEvent Information:
The present-day structure of the Milky Way is a constraint on theories
of Galactic formation and evolution. HII regions, the zones of ionized
gas surrounding recently formed high-mass stars, are common tracers of structure in both the Milky Way and other galaxies. Over the past 10
years, we have more than doubled the number of known Galactic HII
regions by searching for radio recombination line emission toward
infrared-identified HII region candidates. I will discuss (1) our
latest project, the Southern HII Region Discovery Survey, (2) how we
can use our observations to derive the physical properties and
distances of the nebulae, and (3) what we are learning about the
morphological, kinematic, and chemical structure of the Milky Way with
a complete census of Galactic HII regions.Event Location:
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