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Astro2020 Activity, Project of State of the Profession Consideration (APC) White Paper: All-Sky Near Infrared Space Astrometry. State of the Profession Considerations: Development of Scanning NIR Detectors for Astronomy
- Publication Year :
- 2019
- Publisher :
- arXiv, 2019.
-
Abstract
- Gaia is a revolutionary space mission developed by ESA and is delivering 5 parameter astrometry, photometry and radial velocities over the whole sky with astrometric accuracies down to a few tens of micro-arcseconds. A weakness of Gaia is that it only operates at optical wavelengths. However, much of the Galactic centre and the spiral arm regions, important for certain studies, are obscured by interstellar extinction and this makes it difficult for Gaia to deeply probe. This problem can be overcome by switching to the Near Infra-Red (NIR) but this is not possible with silicon CCDs. Additionally, to scan the entire sky and make global absolute parallax measurements the spacecraft must have a constant rotation and this requires the detectors operate in Time Delayed Integration (TDI) mode or similar.
- Subjects :
- Astrophysics of Galaxies (astro-ph.GA)
Astrophysics::Instrumentation and Methods for Astrophysics
Astrophysics::Solar and Stellar Astrophysics
FOS: Physical sciences
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics::Earth and Planetary Astrophysics
Astrophysics - Instrumentation and Methods for Astrophysics
Astrophysics - Astrophysics of Galaxies
Instrumentation and Methods for Astrophysics (astro-ph.IM)
Astrophysics::Galaxy Astrophysics
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....f843cd9be7e2a9b213975ae182c2cff5
- Full Text :
- https://doi.org/10.48550/arxiv.1907.05191