Astron. Astrophys. Suppl. Ser.
Volume 145, Number 3, September 2000
|Page(s)||473 - 479|
|Published online||15 September 2000|
Intrinsic colour calibration for F, G, K stars
Osservatorio Astronomico di Trieste, Via G.B. Tiepolo 11, I-34131 Trieste, Italy
2 Istituto Magistrale S.P.P. e L. annesso al Convitto Nazionale Paolo Diacono, S. Pietro al Nat. Udine, Italy
Send offprint request to: P. Bonifacio e-mail: email@example.com
Accepted: 29 June 2000
We derive an intrinsic colour calibration for F–K stars using broad band Johnson colours and line indices KP and . Through this calibration we can determine of an individual star within 0.03 mag. The values thus derived are in excellent agreement with those derived from Strömgren photometry through the Schuster & Nissen (1989) calibration. The agreement is also good with the reddening maps of Burstein & Heiles (1982) and Schlegel et al. (1998), although in this case there exists a small offset of about 0.01 mag. This calibration may be applied to the large body of data of the HK survey extension which will be published in the near future.
Key words: stars: atmospheres / stars: general / ISM: dust, extinction
© European Southern Observatory (ESO), 2000