Abstract
AbstractWe discuss three possible applications of natural masers and lasers interesting to bioastronomy: 1) the study of protoplanetary circumstellar disks, 2) the study of extrasolar planets, 3) interstellar communications. Masers and lasers in hydrogen recombination lines are observed from the circumstellar disk of a massive star MWC349 A and serve as probes of the disk’s kinematics and structure. They give, in particular, some indications for avoidin the central (R≈ 40 AU) part of the disk, which may be caused by a forming planetary system. We demonstrate that masers (but not lasers) in molecular lines from the atmospheres of the recently discovered extrasolar planets on close orbits around their suns (51 Peg, τ Boo) can be detectable with theexisting ground-basedradioastronomical facilities. The importance of such a detection solicits a deeper analysis of general properties of the planetary masing and lasing and an analysis of the candidate lines to be searched. We argue against the use ofnaturallasers for SETI.
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