Post-Maximum Optical and Infrared Observations of Nova V1425 Aquilae 1995

Abstract

We present the post-maximum optical spectroscopy and infrared photometry of Nova V1425 Aquilae 1995. The data indicate that the nova belongs to the Fe ii class and that it formed an optically thin dust shell at a very early phase compared to other dust forming novae of the same class. The total dust mass is very low with a dust-to-gas ratio of ±10<SUB>-3. The optical spectrum and its evolution are similar to other Fe II novae. An extinction of E<SUB>B</SUB> - <SUB>V</SUB> 0.76 is derived from the He I line ratios and a distance of 2.7 kpc is estimated from the magnitude-decay time relations.</SUB>