Bibcode
Palacios, J.; Wesselius, P. R.; Eiroa, C.; Mora, A.; Montesinos, B.; Merin, B.; Solano, E.; Alberdi, A.; Collier Cameron, A.; Davies, J. K.; Deeg, H. J.; Ferlet, R.; Garzón, F.; Grady, C. A.; Harris, A.; Horne, K.; Miranda, L. F.; Oudmaijer, R. D.; Penny, A.; Quirrenbach, A.; Rauer, H.; Schneider, J.; Tsapras, Y.; de Winter, D.
Bibliographical reference
ISO beyond the peaks: The 2nd ISO workshop on analytical spectroscopy. Eds. A. Salama, M.F.Kessler, K. Leech & B. Schulz. ESA-SP 456. p.219
Advertised on:
11
2000
Citations
0
Refereed citations
0
Description
We present a preliminary analysis of ISO-SWS spectra of a sample of
Vega-type and pre-main sequence stars, which were observed from the
ground in a project devoted to the study of formation and evolution of
planetary systems, carried out during the 1998 International Time of the
Canary Islands Observatories. ISO-SWS covers many interesting features
expected to be present in Vega-type and pre-main sequence objects. Most
of the Vega-type stars shows photospheric spectral energy distributions
up to ≈ 10 μm, while an IR excess is normally observed at
wavelengths larger than ≈ 20 μm. Pre-main sequence (PMS) stars
usually shows IR excesses along the whole SWS spectral range. The 10
μm silicate feature is observed in emission towards most of the PMS
stars, while it is observed in only one Vega-type star in our sample, 51
Oph. The comparison of the silicate features observed towards the
protoplanetary systems with the silicate band profiles of the Trapezium
and comet Kohoutek suggests a better agreement with the solar system
cometary silicates.