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Dust envelopes of two S-type AGB stars
Yang, Xiaohong
The ISO-SWS01 spectra of two S stars, IRAS 15492+4837 and IRAS19486+3247, have been investigated with the radiative transfer code DUSTY. For the two stars, the mass-loss rates determined from DUSTY are smaller than the values derived from CO emission, which might indicate that the mass-loss rates of the two stars was higher in the past. The ∼10 &m…
An ISO-LWS two-colour diagram of Herbig Ae/Be stars
Elia, Davide; Strafella, Francesco; Campeggio, Loretta +2 more
In this paper, we present and discuss an infrared two-colour diagram built with the 60, 100, and 170 µm photometry of the whole sample of Herbig Ae/Be stars observed by the spectrometers on board of ISO satellite. An overview of this diagram reveals a certain degree of homogeneity in the behaviour of these stars and their IR-emitting environ…
Searching for radiative pumping lines of OH masers: II. The 53.3 µm absorption line towards 1612 MHz OH maser sources
Chen, P. S.; He, J. H.
This is the second paper in a series aiming at searching for infrared pumping lines for galactic 1612 MHz OH masers. Our paper I is devoted to the 34.6 µm absorption lines in ISO SWS spectra towards a large sample of galactic OH/IR sources. This paper analyzes the 53.3 µm line in the ISO LWS spectra towards a similar sample of OH/IR so…
ISOCAM observations of the deep IRAS 60 micron sample in the NEP region. II. Comparison of ISO and IRAS galaxy counts
Aussel, H.; Franceschini, A.; De Zotti, G. +3 more
We have determined IRAS flux densities at positions of sources detected by our ISOCAM LW3 observations of the IRAS deep survey sample in the north ecliptic polar region [ApJS 63 (1987) 311]. Exploiting the higher angular resolution of ISOCAM to deal with confusion effects and properly correcting the fluxes for observational biases, we show that 60…