
On presente la photometrie JHK de membres des premiers types du PNM, brillants, rougis et non rougis, et on etudie la loi d'extinction dans ces bandes. La photometrie VRI de plusieurs membres des premiers types du PNM est egalement presentee et combinee aux observations existantes pour etudier l'extinction R et I. Dans la limite des incertitudes, la loi d'extinction de V a K est la meme pour le PNM que pour la Galaxie et le GNM en depit des differences precedemment trouvees dans l'ultraviolet
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 8 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
