Searching for Galactic hidden gas through interstellar scintillation: results from a test with the NTT-SOFI detector
Open accessAbstract
Aims. Stars twinkle because their light propagates through the atmosphere. The same phenomenon is expected at a longer time scale when the light of remote stars crosses an interstellar molecular cloud, but it has never been observed at optical wavelength. In a favorable case, the light of a background star can be subject to stochastic fluctuations on the order of a few percent at a characteristic time scale of a few minutes. Our ultimate aim is to discover or exclude these scintillation effects to estimate the contribution of molecular hydrogen to the Galactic baryonic hidden mass. This feasibility study is a pathfinder toward an observational strategy to search for scintillation, probing the sensitivity of future surveys and estimating the background level.
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The individual sequences would be sensitive to 1% variability on subminute timescales, allowing discovery of planetary eclipses and interstellar scintillation effects.
“The individual sequences would be sensitive to 1% variability on subminute timescales, allowing discovery of planetary eclipses and of interstellar scintillation effects, expected when the light of a background star propagates through a turbulent gas medium ( Moniez 2003; Habibi et al. 2011 ) .”
From LSST: From Science Drivers to Reference Design and Anticipated Data Products (2019) · cites this paper as Habibi et al. 2011
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- Authors
- Habibi, F., Moniez, M., Ansari, R., & Rahvar, S.
- Affiliations
- Université Paris-Sud (FR)
- Sharif University of Technology (IR)
- Venue
- Astronomy & Astrophysics
- Publisher
- EDP Sciences
- Published
- 2010-12-06
- Volume
- 525
- Pages
- A108
- ISSN
- 0004-6361 (ISSN-L)
- 1432-0746
- OpenAlex
- W2038345123
- Cited by
- 13
- References
- 28
- Citations by year
- 2023: 1 · 2019: 1 · 2017: 1 · 2016: 3 · 2014: 2 · 2013: 2 · 2012: 2
- FWCI
- 0.89
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Astronomy and Astrophysics (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- HAL (submittedVersion, other-oa)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysics and Star Formation Studies
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Physical Sciences › Physics and Astronomy › Instrumentation › Astronomy and Astrophysical Research
- Keywords
- interstellar scintillation, molecular clouds, molecular hydrogen, baryonic mass, optical scintillation, feasibility study
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