Near-infrared observations of candidate extrinsic S stars

Details Near-infrared observations of candidate extrinsic S stars Near-infrared observations of candidate extrinsic S stars

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...387..129w&link_type=abstract

Astronomy and Astrophysics, v.387, p.129-138 (2002)

Astronomy and Astrophysics

Astrophysics

7

Stars: Agb And Post-Agb, Stars: Evolution, Stars: Circumstellar Matter, Infrared: Stars

Scientific paper

Photometric observations in the near infrared for 161 S stars, including 18 Tc-rich (intrinsic) stars, 19 Tc-deficient (extrinsic) ones and 124 candidates for Tc-deficient S stars, are presented in this paper. Based on some further investigations into the infrared properties of both Tc-rich and Tc-deficient S stars, 104 candidates are identified as very likely Tc-deficient S stars. The large number of infrared-selected Tc-deficient S stars provides a convenient way to study the physical properties and the evolutionary status of this species of S stars.

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