HaloSat: A CubeSat to Study the Hot Galactic Halo
Abstract
HaloSat is a small satellite (CubeSat) designed to map soft X-ray oxygen line emission across the sky in order to constrain the mass and spatial distribution of hot gas in the Milky Way. The goal of HaloSat is to help determine if hot gas gravitationally bound to individual galaxies makes a significant contribution to the cosmological baryon budget. HaloSat was deployed from the International Space Station in 2018 July and began routine science operations in 2018 October. We describe the goals and design of the mission, the on-orbit performance of the science instrument, and initial observations.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- October 2019
- DOI:
- arXiv:
- arXiv:1909.13822
- Bibcode:
- 2019ApJ...884..162K
- Keywords:
-
- X-ray observatories;
- Diffuse x-ray background;
- Circumgalactic medium;
- Hot ionized medium;
- X-ray surveys;
- Space vehicle instruments;
- 1819;
- 384;
- 1879;
- 752;
- 1824;
- 1548;
- Astrophysics - Instrumentation and Methods for Astrophysics;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- to appear in the Astrophysical Journal, 11 pages corrected arXiv author list