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2006A&A...450..339V - Astronomy and Astrophysics, volume 450, 339-343 (2006/4-4)
The first 8-13 µm spectra of globular cluster red giants: circumstellar silicate dust grains in 47 Tucanae (NGC104).
VAN LOON J.T., McDONALD I., OLIVEIRA J.M., EVANS A., BOYER M.L., GEHRZ R.D., POLOMSKI E. and WOODWARD C.E.
Abstract (from CDS):
We present 8-13µm spectra of eight red giants in the globular cluster 47Tucanae (NGC104), obtained at the European Southern Observatory 3.6m telescope. These are the first mid-infrared spectra of metal-poor, low-mass stars. The spectrum of at least one of these, namely the extremely red, large-amplitude variable V1, shows direct evidence of circumstellar grains made of amorphous silicate.
Abstract Copyright: ∼
Journal keyword(s): stars: AGB and post-AGB - circumstellar matter - stars: evolution - stars: mass-loss - infrared: stars - globular clusters: individual: 47 Tucanae (NGC104)
Simbad objects: 12
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