First 0.96-1.46 Micron Near-IR Spectra of Meteors
Advances in Space Research
During the 2002 Leonid Multi-Instrument Aircraft Campaign, spectra were obtained of two Leonid meteors in the near-IR wavelength range of an InGaAs camera (0.96–1.46 micron). The spectrum contains atomic oxygen and nitrogen lines that are well-described by a typical warm 4400 K meteoric plasma emitting in local thermodynamic equilibrium, but the First Positive Δν = 0 band of N2 is weaker than expected. A quite bright continuum is also present, with a blackbody temperature of ∼4400 K, much higher than that expected from hot debris. The cause of the continuum blackbody emission is a puzzle, as are several unidentified features.
Taylor, M.J., P. Jenniskens, K. Nielsen, and P.-D. Pautet, First 0.96-1.46 micron near-IR spectra of meteors, Adv. Space Res., 39, 544-549, doi:10.1016/j.asr.2006.05.017, 2007.