Issue |
A&A
Volume 391, Number 1, August III 2002
|
|
---|---|---|
Page(s) | 195 - 212 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20020612 | |
Published online | 29 July 2002 |
Theoretical isochrones in several photometric systems
I. Johnson-Cousins-Glass, HST/WFPC2, HST/NICMOS, Washington, and ESO Imaging Survey filter sets
1
Dipartimento di Astronomia, Università di Padova, Vicolo dell'Osservatorio 2, 35122 Padova, Italy
2
Osservatorio Astronomico di Trieste, via Tiepolo 11, 34131 Trieste, Italy
3
Istituto di Astrofisica Spaziale, CNR, via del Fosso del Cavaliere, 00133 Roma, Italy
4
Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy
5
PACS ICC-team, Instituut voor Sterrenkunde, Celestijnenlaan 200B, 3001 Heverlee, Belgium
6
European Southern Observatory, Karl-Schwarzschild-Str. 2, 85740 Garching bei München, Germany
7
Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85740 Garching bei München, Germany
Corresponding author: L. Girardi, Lgirardi@ts.astro.it
Received:
5
November
2001
Accepted:
19
April
2002
We provide tables of theoretical isochrones in several
photometric systems. To this aim, the following steps
are followed:
(1) first, we re-write the formalism for converting
synthetic stellar spectra into tables of bolometric
corrections. The resulting formulas can be
applied to any photometric system, provided that
the zero-points are specified by means of either ABmag, STmag,
VEGAmag, or a standard star system that includes well-known
spectrophotometric standards. Interstellar absorption can be
considered in a self-consistent way.
(2) We assemble an extended and
updated library of stellar intrinsic spectra. It is mostly
based on “non-overshooting” ATLAS9 models, suitably extended
to both low and high effective temperatures. This offers an
excellent coverage of the parameter space of , ,
and . We briefly discuss the main uncertainties and points
still deserving more improvement.
(3) From the spectral library, we derive tables of bolometric
corrections for Johnson-Cousins-Glass, HST/WFPC2, HST/NICMOS,
Washington, and ESO Imaging Survey systems (this latter
consisting on the WFI, EMMI, and SOFI filter sets).
(4) These tables are used to convert several sets of Padova
isochrones into the corresponding absolute magnitudes and
colours, thus providing a useful database for several astrophysical
applications. All data files are made available in electronic
form.
Key words: stars: fundamental parameters / Hertzprung-Russell (HR) and C-M diagrams
© ESO, 2002
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