Interpolated PARSEC Stellar Evolution Tracks
Tracks with equally spaced equivalent evolutionary points (EEPs) and an equal number of points between EEPs for simple interpolations between tracks and across metallicity.
Primarily designed to be easily implemented in Andrew Dolphin's MATCH package
Download all tracks here: All Tracks
Download Interpolated PARSEC Tracks
PARSEC V1.2S Tracks were downloaded Jan 2016 from Alessandro Bressan's Home Page
TP-AGB Tracks were calculated for and presented in Rosenfield et al. 2016
For isochrones please use Leo Girardi's web interface
Tracks were run using parsec2match.py on 2016-09-05 (git hash b196c81).
Download all tracks/code: All Tracks
Track Interpolations
PARSEC tracks are interpolated such that each track has the same number of points between each equivalent evolutionary point (EEP).
Complete details are in the codebase, a good starting point is define_eep.py.
| Model number | EEP Notes | |
|---|---|---|
| 0 | Beginning of Pre Main Sequence | |
| 200 | Beginning of Main Sequence (MS)* | |
| 400 | log Teff minimum on the Main Sequence* | |
| 600 | Main Sequence turn off (MSTO)* | |
| 1100 | RG tip: Tip of the RGB (TRGB)* | |
| 1130 | Beginning Core He Fusion: Start central He-burning phase* | |
| 1630 | End of Core He Fusion* | |
| 1730 | Beginning of TP-AGB (if the star has the a phase) ** |
* EEP definitions followed Dotter 2016 as close as possible
** Marigo 2015
Helium burning phases take place from 1130 on. There are six different track lengths:
- 600: Up to the MS turn off (low mass)
- 1100: Up to the TRGB (He-flash stars that will continue onto the horizontal branch)
- 1730: All phases (that are too massive for TP-AGB)
- 1930: All phases (including the 200 points on the TP-AGB)
- 600: Only Helium burning phases (Horizontal Branch tracks
*HB.dat) - 800: Only Helium burning phases + TPAGB (Horizontal Branch tracks
*HB.dat)
Model number = line number + 1. (Model number does not include header line of the file)
File Format
Within each metallicity set (directory) there are a number of tracks (files). The file names are formatted by initial metallicity, helium, and mass (Z{}_Y{}_M{}.extension). Horizontal branch tracks are calculated separately and have extension .HB.dat all other tracks have only the .dat extension
Each file has six columns: log Age, Mass, log Teff, Mbol, log g, C/O in units yrs, Msun, K, bolometric mag, solar surface gravity (cgs), and unitless.
Notes on column formats:
- Horizontal branch ages start at the zero age horizontal branch.
- PARSEC does not print out
log gorMbolthey are derived here fromlog Teff,log LandMass:
Mbol = 4.77 - 2.5 * log L
log g = -10.616 + log mass + 4.0 * log Teff - log L
How to Cite
Use of PARSEC V1.2S tracks should at least reference Bressan et al. 2012 and if you are using TP-AGB tracks please reference Rosenfield et al. 2016.
High mass tracks were updated from Bressan 2012 by Tang et al. 2014.
Low mass tracks were updated from Bressan 2012 by Chen et al. 2014.
Older VersionsThe previous version of these tracks (without TP-AGB) are still available here
If you use these tracks please also cite:
