Near infrared spectroscopy and infrared photometry of a new WC9 star

Details Near infrared spectroscopy and infrared photometry of a new WC9 star Near infrared spectroscopy and infrared photometry of a new WC9 star

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...118..301d&link_type=abstract

Astronomy and Astrophysics, vol. 118, no. 2, Feb. 1983, p. 301-305.

Astronomy and Astrophysics

Astronomy

33

Carbon Stars, Infrared Astronomy, Infrared Photometry, Late Stars, Stellar Spectrophotometry, Wolf-Rayet Stars, Cosmic Dust, Interstellar Extinction, Near Infrared Radiation, Star Clusters, Stellar Envelopes

Scientific paper

The discovery of a new WC9 star is reported. The star is situated in the Centaurus link at a distance of ≅4 kpc and is possibly associated with two newly discovered Galactic clusters C 1309-624 and C 1310-624. The star exhibits characteristics very similar to Ve 2-45: strong infrared excess due to a 1300K BB circumstellar dust shell, an (H-K)obs index ≅2.1 and a total extinction Av ≅ 9m.2 of which 4m.7 is estimated to be intrinsic. However, unlike other Wolf-Rayets, this star exhibits strong infrared variability with variations of ≅1 mag in J, H, K, L, and M over a period of a year. It is suggested that this may be due to an expanding dust envelope.

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