| Issue |
Astron. Astrophys. Suppl. Ser.
Volume 145, Number 3, September 2000
|
|
|---|---|---|
| Page(s) | 473 - 479 | |
| DOI | https://doi.org/10.1051/aas:2000253 | |
| Published online | 15 September 2000 | |
Intrinsic colour calibration for F, G, K stars
1
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: bonifaci@ts.astro.it
Received:
5
May
2000
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