Evelyn Johnston

Local Volume Mapper

Website: sdss.org/dr15/future/lvm/

The Local Volume Mapper (LVM) is an optical, integral-field spectroscopic survey that will target the Milky Way, Small and Large Magellanic Clouds, M31, and other Local Volume galaxies. LVM will make use of newly built spectrographs that cover a wavelength range of 3600-10000 Å, with spectral resolution R~4000. It will collect more than 25 million contiguous spectra over 3,000 square degrees of sky. LVM will make its observations using new small telescopes at the Las Campanas Observatory in Chile.

Science Goals

Galaxy formation can be understood as a self-regulating process, with energy exchange between stars and interstellar gas occurring at numerous points in space and time. LVM will map the interstellar gas emission of the Milky Way and Local Group galaxies with unprecedented spatial resolution: reaching sub-parsec resolution in the Milky Way, 10s of parsecs resolution in the Magellanic Clouds, and down to <100 parsec resolution out to distances of several Mpc. LVM is thus well-positioned to study star formation and the physics of the interstellar medium in great detail due to its ability to distinguish individual star formation knots and the filamentary structures and shock networks between them. LVM will be able to connect studies across the parsec (sub Giant Molecular Cloud) and kilo-parsec (galaxy-wide) scales; this connection is fundamental to understand the physics governing star formation, the structure of the interstellar medium, the baryon cycle, and ultimately, the evolution of galaxies.

Role

My role within the LVM is the Survey operations Scientist. I will be overseeing the day to day operations, including selecting targets to observe, ensuring calibrations are carried out, and ensuring data is reobserved if it doesn’t meet the required depth and quality. 

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