PARSEC V2.0 Rotating Tracks - Overview

This database provides stellar evolution tracks computed with:

Details on the adopted physics are given in Nguyen et al. 2022 and Nguyen et al. 2025.

Composition of the non-rotating sets

Tracks column description

The following table lists the quantities contained in the new non-rotating and rotating tracks with M ≳ 0.7 Msun, and in the HB tracks:

Column number Quantity Description
1 MASS current total mass [Msun]
2 AGE age [yr]
3 DTIME time-step [yr]
4 LOG_L log10 total luminosity [log10 Lsun]
5 LOG_TE effective temperature [log10 K]
6 RSTAR star radius [cm]
7 CONV mass of the convective core (incl. overshooting) [M/Mtot]
8 QSCHW mass of the unstable core (Schwarzschild mass) [M/Mtot]
9 QHEL mass where X = 0 [M/Mtot]
10 QCAROX mass where Y = 0 [M/Mtot]
11 LOG_TC log10 central temperature [log10 K]
12 LOG_RHC log10 central density [log10 g cm-3]
13 LOG_PC log10 central pressure [log10 10-1 Pa]
14 PSI_C degeneracy parameter at center
15 G1_AVG averaged Gamma 1 adiabatic index, see Stothers et al. 1999 and Marchant et al. 2019
16 RATE mass loss rate [Msun yr-1]
17 POLRAD_ENV star polar radius [cm]
18 EQRAD_ENV star equatorial radius [cm]
19 OMG_ENV angular rotation rate = angular velocity / angular critical velocity
20 ANG_VEL_ENV envelope angular velocity [cm s-1]
21 TANVEL_ENV tangential linear velocity at the equator[cm s-1]
22 TOT_INERTIA total moment of inertia of the star [g cm2]]
23 TOT_ANGMOM total angular momentum [g cm2 s-1]
24 TOT_MOM_LOST total angular momentum lost due to stellar wind [g cm2 s-1]
25 R_CONV radius at CONV [log10 cm]
26 RHEL radius at QHEL [log10 cm]
27 R_CAROX radius at QCAROX [log10 cm]
28 TMAX maximum temperature [log10 K]
29 RHTMAX density where T = TMAX [log10 g cm-3]
30 QTMAX mass coordinate where T = TMAX [M/Mtot]
31 LNUC luminosity produced by nuclear burning [L/Ltot]
32 LX luminosity by hydrogen burning [L/Ltot]
33 LY luminosity by helium burning [L/Ltot]
34 LC luminosity by carbon burning [L/Ltot]
35 LNEUTR neutrino luminosity [L/Ltot]
36 L_GRAV gravitational luminosity [L/Ltot]
37 L_ACC accretion luminosity [L/Ltot]
38 Q_CNV bottom of the convective envelope in mass fraction [M/Mtot]
39 DPTH_CNV radial depth of convective envelope [log10 cm]
40 TCNV_YR turnover timescale of convective bubble [yr]
41 T20L10 atmosphere temperature of the gas at tau = 20 [log10 K]
42 RH20L10 atmosphere density of the gas at tau = 20 [log10 g cm-3]
43 P20L10 atmosphere pressure of the gas at tau = 20 [log10 10-1 Pa]
44 TE20L10 temperature from Stefan-Boltzmann law at tau = 20 [log10 K]
45 R20L10 atmosphere radius at tau = 20 [log10 cm]
46 T2_3L10 atmosphere temperature of the gas at tau = 2/3 [log10 K]
47 RH2_3L10 atmosphere density of the gas at tau = 2/3 [log10 g cm-3]
48 P2_3L10 atmosphere pressure of the gas at tau = 2/3 [log10 10-1 Pa]
49 TE2_3L10 temperature from Stefan-Boltzmann law at tau = 2/3 [log10 K]
50 R2_3L10 atmosphere radius at tau = 2/3 [log10 cm]
51 XH1_CEN central H1 mass fraction
52 XHE3_CEN central He3 mass fraction
53 XHE4_CEN central He4 mass fraction
54 XC12_CEN central C12 mass fraction
55 XN14_CEN central N14 mass fraction
56 XO16_CEN central O16 mass fraction
57 XNE_CEN central Ne20+Ne22 mass fraction
58 XMG_CEN central Mg24+Mg25+Mg26 mass fraction
59 XSI28_CEN central Si28 mass fraction
60 XS32_CEN central S32 mass fraction
61 XAR36_CEN central Ar36 mass fraction
62 XCA40_CEN central Ca40 mass fraction
63 XTI44_CEN central Ti44 mass fraction
64 XH1_SURF surface H1 mass fraction
65 XD_SURF surface Deuterium mass fraction
66 XHE3_SURF surface He3 mass fraction
67 XHE4_SURF surface He4 mass fraction
68 XLI7_SURF surface Li7 mass fraction
69 XBE7_SURF surface Be7 mass fraction
70 XC12_SURF surface C12 mass fraction
71 XC13_SURF surface C13 mass fraction
72 XN14_SURF surface N14 mass fraction
73 XN15_SURF surface N15 mass fraction
74 XO16_SURF surface O16 mass fraction
75 XO17_SURF surface O17 mass fraction
76 XO18_SURF surface O18 mass fraction
77 XF19_SURF surface F19 mass fraction
78 XNE20_SURF surface Ne20 mass fraction
79 XNE21_SURF surface Ne21 mass fraction
80 XNE22_SURF surface Ne22 mass fraction
81 XNE23_SURF surface Ne23 mass fraction
82 XMG24_SURF surface Mg24 mass fraction
83 XMG25_SURF surface Mg25 mass fraction
84 XMG26_SURF surface Mg26 mass fraction
85 XAL26_SURF surface Al26 mass fraction
86 XAL27_SURF surface Al27 mass fraction
87 XSI28_SURF surface Si28 mass fraction
88 XS32_SURF surface S32 mass fraction
89 XAR36_SURF surface Ar36 mass fraction
90 XCA40_SURF surface Ca40 mass fraction
91 XTI44_SURF surface Ti44 mass fraction
92 XCR48_SURF surface Cr48 mass fraction
93 XFE52_SURF surface Fe52 mass fraction
94 XNI56_SURF surface Ni56 mass fraction
95 XZN60_SURF surface Zn60 mass fraction

Old-track columns (VLM stars, M ≤ 0.7 Msun)

NOTE: The quantities may carry different names from the new PARSEC version.

Column number Quantity Description
1 MASS Current total mass [Msun]
2 AGE Age [yr]
3 LOG_L log10 total luminosity [log10 Lsun]
4 LOG_TE effective temperature [log10 K]
5 LOG_R stellar radius [log10 cm]
6 LOG_RAT mass loss rate [log10 Msun/yr]
7 M_CORE_HE mass of H exhausted core [M/Mtot]
8 M_CORE_C mass of He exhausted core [M/Mtot]
9 H_CEN central hydrogen mass fraction
10 HE_CEN central helium mass fraction
11 C_CEN central carbon mass fraction
12 O_CEN central oxygen mass fraction
13 LX luminosity by hydrogen burning [L/Ltot]
14 LY luminosity by helium burning [L/Ltot]
15 LC luminosity by carbon burning [L/Ltot]
16 LNEUTR neutrino luminosity [L/Ltot]
17 L_GRAV gravitational luminosity [L/Ltot]
18 H_SUP surface H1 mass fraction
19 HE_SUP surface He4 mass fraction
20 C_SUP surface C12 mass fraction
21 N_SUP surface N14 mass fraction
22 O_SUP surface O16 mass fraction