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          Institute: MPI für Astrophysik     Collection: Stellar Astrophysics     Display Documents

ID: 12174.0, MPI für Astrophysik / Stellar Astrophysics
Theoretical isochrones in several photometric systems - I. Johnson-Cousins-Glass, HST/WFPC2, HST/NICMOS, Washington, and ESO Imaging Survey filter sets
Authors:Girardi, L.; Bertelli, G.; Bressan, A.; Chiosi, C.; Groenewegen, M. A. T.; Marigo, P.; Salasnich, B.; Weiss, A.
Date of Publication (YYYY-MM-DD):2002
Title of Journal:Astronomy & Astrophysics
Journal Abbrev.:Astron. Astrophys.
Issue / Number:1
Start Page:195
End Page:212
Review Status:Peer-review
Audience:Experts Only
Abstract / Description: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 T-eff, log g, and[M/H]. 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.
Free Keywords:stars : fundamental parameters; Hertzprung-Russell (HR) and C-M diagrams
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astrophysik
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