Bibcode
Phillips, J. P.; Riera, A.; Mampaso, A.
Referencia bibliográfica
(IAU, European Regional Astronomy Meeting, 11th, La Laguna, Spain, July 3-8, 1989) Astrophysics and Space Science (ISSN 0004-640X), vol. 171, no. 1-2, Sept. 1990, p. 173-176.
Fecha de publicación:
9
1990
Número de citas
4
Número de citas referidas
4
Descripción
The results of near-infrared mapping, optical spectroscopy, and
millimetric CO J = 2-1 observations of the halo about IC 418 are
presented. As a result, it is confirmed that NIR emission extends
outside of the principal emission shell, and into a zone characterized
by weak optical grain scattering and (in all probability) strong FIR
emission. An analysis of the optical and FIR data suggests an overall
shell mass of 0.026 solar mass (for an assumed distance 0.412 kpc),
although the absence of associated CO emission suggests that the shell,
if neutral, must possess a relatively low molecular abundance.