SIMBAD references

2001A&A...376..997L - Astronomy and Astrophysics, volume 376, 997-1010 (2001/9-4)

Galactic mass-losing AGB stars probed with the IRTS. I.

LE BERTRE T., MATSUURA M., WINTERS J.M., MURAKAMI H., YAMAMURA I., FREUND M. and TANAKA M.

Abstract (from CDS):

AGB mass-losing sources are easy to identify and to characterize in the near-infrared range (1-5µm). We make use of the near-infrared data acquired by the Japanese space experiment IRTS to study a sample of sources detected in the 2 celestial strips surveyed by the IRTS. Mass-loss rates and distances are estimated for 40 carbon-rich sources and 86 oxygen-rich sources of which 8 are probably of S-type. Although the sample is small, one sees a dependence of the relative contribution of the two kinds of sources to the replenishment of the interstellar medium (ISM) on the galactocentric distance. E.g. from 6 to 8kpc, oxygen-rich sources in our sample contribute 10-12 times as much as carbon rich sources, whereas from 10 to 12kpc, the latters contribute 3-4 times as much as the formers. Therefore, one would expect a gradient in the composition of the ISM between 6 and 12 kpc from the Galactic Centre, especially in its dust component. Most of the replenishment (>50%) by AGB stars is due to sources with mass-loss rate larger than 10–6M/yr.

Abstract Copyright:

Journal keyword(s): stars: carbon - stars: mass-loss - stars: AGB and post-AGB - ISM: evolution - galaxy: solar neighbourhood - infrared: stars

VizieR on-line data: <Available at CDS (J/A+A/376/997): table4.dat>

Nomenclature: Table 4: [LMW2001] NNN N=126 among (Nos 9-791).

Simbad objects: 150

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2020.08.12-20:38:22

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