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Poster communications

Search for hidden baryons through scintillation

Abstract : We propose a new way to search for (hidden) cool molecular hydrogen H2 in the Galaxy through diffractive and refractive effects: in favorable cases the light of a background star can be subject to stochastic fluctuations of the order of a few percent at a characteristic time scale of a few minutes. We tested the concept by observing stars in SMC and through nebulae with the NTT telescope. One star showed fluctuations compatible with a scintillation effect through a turbulent structure in B68 nebula. We could establish upper limits on the contribution of gas clumpuscules to the Galactic halo. We show that monitoring a few 106 star × hour with a > 4 m telescope and a fast readout camera should allow one to seriously constrain the contribution of turbulent molecular gas to the Galactic mass.
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Contributor : Sabine Starita <>
Submitted on : Friday, December 16, 2011 - 3:15:39 PM
Last modification on : Wednesday, September 16, 2020 - 4:22:21 PM


  • HAL Id : in2p3-00652891, version 1




M. Moniez. Search for hidden baryons through scintillation. 12th International Conference on Topics in Astroparticle and Underground Physics (TAUP2011), Sep 2011, Munich, Germany. ⟨in2p3-00652891⟩



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