Extragalactic Science with the Orbiting Astronomical Satellite Investigating Stellar Systems (OASIS) Observatory
Review article, 2023

The Orbiting Astronomical Satellite for Investigating Stellar Systems (OASIS), a proposed Astrophysics MIDEX-class mission concept, has an innovative 14-meter diameter inflatable primary mirror that will provide the sensitivity to study far-infrared continuum and line emission from galaxies at all redshifts with high spectral resolution heterodyne receivers. OASIS will have the sensitivity to follow the water trail from galaxies to the comets that create oceans. It will bring an understanding of the role of water in galaxy evolution and its part of the oxygen budget, by measuring water emission from local to intermediate redshift galaxies, observations that have not been possible from the ground. Observation of the ground-state HD line will accurately measure gas mass in a wide variety of astrophysical objects. Thanks to its exquisite spatial resolution and sensitivity, OASIS will, during its one-year baseline mission, detect water in galaxies with unprecedented statistical significance. This paper reviews the extragalactic science achievable and planned with OASIS.

THz spectroscopy

Flight mission concept

Extragalactic science

Heterodyne spectral resolution


Susanne Aalto

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics

C. Battersby

University of Connecticut

Gordon Chin

NASA Goddard Space Flight Center

L. K. Hunt

Istituto nazionale di astrofisica (INAF)

D. Rigopoulou

University of Oxford

Antony A. Stark

Harvard-Smithsonian Center for Astrophysics

Serena Viti

Leiden University

Christopher K. Walker

University of Arizona

Space Science Reviews

0038-6308 (ISSN) 1572-9672 (eISSN)

Vol. 219 1 9

Subject Categories

Astronomy, Astrophysics and Cosmology

Oceanography, Hydrology, Water Resources

Geosciences, Multidisciplinary





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