Up: Abstract
Astron. Astrophys. Suppl. Ser. 145, 473-479
Intrinsic colour calibration for F, G, K stars
P. Bonifacio1 -
E. Caffau2 -
P. Molaro1
Send offprint request: P. Bonifacio
e-mail: bonifaci@ts.astro.it
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
Received May 5; accepted June 29, 2000
Abstract:
We derive an intrinsic colour calibration for F-K stars using broad
band Johnson colours and line indices
KP and
HP2.
Through this calibration we can determine
E(
B-
V) of an individual star
within
0.03 mag.
The
E(
B-
V) 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
Up: Abstract
Copyright The European Southern Observatory (ESO)