A Bright Molecular Core in a Crab Nebula Filament - Astrophysics > Astrophysics of GalaxiesReportar como inadecuado




A Bright Molecular Core in a Crab Nebula Filament - Astrophysics > Astrophysics of Galaxies - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: In a sub-arcsec near-infrared survey of the Crab Nebula using the new SpartanInfrared Camera, we have found several knots with high surface brightness inthe H 2 2.12 micron line and a very large H 2 2.12 micron to Br-gamma ratio.The brightest of these knots has an intensity ratio IH 2 2.12micron-IBr-gamma = 18+-9, which we show sets a lower limit on the ratio ofmasses in the molecular and recombination i.e. ionized zones M mol - M rec>- 0.9, and a total molecular mass within this single knot M mol >- 5E-5M sun. We argue that the knot discussed here probably is able to emit sostrongly in the 2.12 micron line because its physical conditions are bettertuned for such emission than is the case in other filaments. It is unclearwhether this knot has an unusually large M mol - M rec ratio, or if many otherCrab filaments also have similar amounts of molecular gas which is not emittingbecause the physical conditions are not so well tuned.



Autor: E. D. Loh, J. A. Baldwin, G. J. Ferland

Fuente: https://arxiv.org/



DESCARGAR PDF




Documentos relacionados