David Hollenbach

Reflight of the Stratospheric TeraHertz Observatory: STO-2 - Collaborative Proposal

Here we propose the "Reflight of the Stratospheric TeraHertz Observatory: STO-2". STO-2 will address a key problem in modern astrophysics, understanding the Life Cycle of the Interstellar Medium (ISM). STO-2 will survey approximately ¼ of the Southern Galactic plane in the dominant interstellar cooling line [CII] (158 µm) and the important star formation tracer [NII] (205 µm). With ~1 arcminute angular resolution, STO-2 will spatially resolve atomic, ionic and molecular clouds out to 10 kpc. Taking advantage of its enhanced, extended lifetime cryogenic receivers, the STO-2 survey will be conducted at unparalleled sensitivity levels. STO-2 will uniquely probe the pivotal formative and disruptive stages in the life cycle of interstellar clouds and the relationship between global star formation rates and the properties of the ISM. Combined with previous HI and CO surveys, STO-2 will create 3-dimensional maps of the structure, dynamics, turbulence, energy balance, and pressure of the Milky Way's ISM, as well as the star formation rate. Once we gain an understanding of the relationship between ISM properties and star formation in the Milky Way, we can better interpret observations of nearby galaxies and the distant universe.

David Hollenbach
Senior Research Scientist
Curriculum Vitae: 

Research Scientist, Space Science Division, NASA-Ames Research Center (1980-present)
National Research Council Associate, NASA-Ames (1979-1980)
Research Scientist, University of California at Berkeley (1975-1979)

• Principal Investigator of the Center for Star Formation Studies 1985-present
• Principal Investigator and Co-Investigator on numerous theoretical grants concerning the evolution of the interstellar medium, star formation, interstellar and protoplanetary dust, and the evolution of protostellar disks.
• Significant involvement in a number of space missions which studied or are going to study the interstellar medium and star formation, including KAO. SWAS, ISO, SIRTF, and SOFIA. The most relevant is Co-Investigator on the SIRTF Legacy Program "Formation and Evolution of Planetary Systems"

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