Abstract
The hypothesis on exogenous origin of organic matter on the early Earth is supported by the detection of alarge variety of organic compounds in carbonaceous chondrites. We performed high velocity impactexperiments with an ISAS railgun HYPAC. In the present work, 10 mM glycine aqueous solution and amixture of ammonia, methanol and water simulating comets were used as targets. Diketopiperazine wereformed when a 10 mM glycine was used as a starting material, but none of glycine peptides were detected.When an aqueous solution containing ammonia, methanol and water was shocked by impact at the velocityof 6.4 km/s, a number of amino acids (e.g., serine and glycine) were detected after hydrolysis of the product.The present results suggest that organic material could survive and/or formed during an impact process.
