On the discrepancy between the optical and radio position of T Tauri

Details On the discrepancy between the optical and radio position of T Tauri On the discrepancy between the optical and radio position of T Tauri

May 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...109l..15d&link_type=abstract

Astronomy and Astrophysics, vol. 109, no. 2, May 1982, p. L15-L16. Deutsche Forschungsgemeinschaft

Astronomy and Astrophysics

Astrophysics

12

Astrography, Astrometry, Radio Stars, Stellar Motions, T Tauri Stars, Variable Stars, Position (Location), Radio Spectra

Scientific paper

A precise optical position and proper motion in the FK4 system of the nebular variable T Tauri has been derived from astrograph plates covering more than 50 years of epoch difference. Comparison with a recently derived VLA-radio position by Cohen et al. (1982) yields a significant difference which confirms the offset of about 0.8 arcsec quoted by these authors. The new optical position is derived from short exposure plates, showing no indication of disturbing nebulosity. A systematic shift of the optical position due to nebulosity is therefore questioned. The physical connection of the radio and optical emission centers probably needs further confirmation.

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