Showing papers by "Benjamin L. Schulz published in 1998"
TL;DR: In this paper, a number of symbiotic stars have been observed with ISO, including RR Tel and V1016 Cyg, which reveal prominent 10 and 18 µm silicate dust features.
Abstract: A number of symbiotic stars have been observed with ISO. In addition to a number of emission lines, SWS observations of the symbiotic novae RR Tel and V1016 Cyg reveal prominent, broad 10 & 18 µm silicate dust features. The 10 µm, features are similar to the crystalline silicate profiles seen in classical novae. There is some evidence that the silicate brightness in V1016 Cyg varies with Mira-component phase. However, the silicate feature in RR Tel also showed some variation even though observations were made at very similar Mira-component phases. PHT observations of S-type symbiotic stars show the IR emission to be dominated by the red-giant component. However, an excess in the PHT-P filters from 10 to 15 µm is evident in all the stars, and there may be a broad 3.2 µm absorption feature or a broad 3.8 µm emission feature. At this time we have no adequate physical explanations for any of these features.
6 citations
Posted Content•
TL;DR: In this paper, mid-IR imaging at 7 and 10 microns of the galaxy cluster Abell 370, obtained with the ISOCAM instrument onboard ESA's Infrared Space Observatory (ISO), as part of an ongoing program to image gravitational arcs and arclets in distant clusters.
Abstract: We report on the mid-IR imaging at 7 and 10 microns of the galaxy cluster Abell 370, obtained with the ISOCAM instrument onboard ESA's Infrared Space Observatory (ISO), as part of an ongoing program to image gravitational arcs and arclets in distant clusters.
We have recorded initial detections of the A0 giant arc in both bandpasses, the two central dominant galaxies at 7 microns, and several other cluster members and field galaxies.
These preliminary results are indicative of the potential output of our program when more extensive observational data become available.
2 citations
TL;DR: In this paper, the authors describe the ISO program to observe classical novae during and shortly after an eruption, and old novae, including observations of far infrared fine structure lines.
Abstract: We describe the ISO programme to observe classical novae. The programme includes observations of novae during and shortly after eruption, and old novae. ISO observations of far infrared fine structure lines are providing us with information about physical conditions in nova ejecta which complement and extend knowledge obtained from ground-based observations. Surprisingly, we are getting little information about dust in nova systems, despite the fact that many novae are prolific dust-producers.