SIMBAD references

1999ApJ...520..215F - Astrophys. J., 520, 215-222 (1999/July-3)

Infrared space observatory photometric search of main-sequence stars for Vega-type systems.


Abstract (from CDS):

We obtained 3.6-20 µm photometry of 38 bright [IRAS Fν(12 µm)>0.7 Jy] main-sequence stars with the Infrared Space Observatory (ISO). Observations were conducted with the ISOPHOT instrument, in the single-pointing photometry mode, through filters at 3.6, 11.5, and 20.0 µm. We searched for excess (Vega-type) emission from dust at temperatures ≳100 K, located at ∼1-60 AU from the stars. We thus sampled dust at warm, terrestrial material temperatures and at cool (∼100 K) temperatures of possible Kuiper Belt-type regions in these systems. We detected 20 µm excesses from ∼14% of our sources, but we did not detect 11.5 µm excesses from any of them. We present single-temperature blackbody models of the location and density of dust emission around 10 stars, two of them (29 Cyg and Gl 816) with excesses newly reported here. We make a thorough comparison of ISO and IRAS data on our target stars and propose a new calibration procedure for ISOPHOT staring measurements at 3.6, 11.5, and 20 µm.

Abstract Copyright:

Journal keyword(s): Stars: Circumstellar Matter - ISM: Dust, Extinction - Infrared: Stars

Simbad objects: 39

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