Absorption line-strength models based on empirical fitting functions

A number of absorption line-strengths are predicted on the basis of the, so-called, empirical fitting functions:

Line-strengths are computed for all the SSPs described in this Table. However the age ranges (in Gyr) where these predictions are safe (since do not require many extrapolations of the empirical fitting functions employed by the models) are listed below:

The full set of predictions for each IMF type can be obtained from the following files:

Isochrone

Unimodal

Bimodal

Kroupa Universal

Kroupa Revised

Chabrier

Padova+00

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BaSTI

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The first column of these files contain two letters identifying the IMF type: UN (unimodal), BI (bimodal), KU (Kroupa Universal) and KB (Kroupa Revised). The second column indicates the IMF slope (does not apply for the models calculated with Kroupa IMFs). The third column indicates the age (in Gyr). The information per column is the following: (1) IMF type, (2) IMF slope, (3) [M/H], (4) Age, (5) CN1, (6) CN2, (7) Ca4227, (8) G-band, (9) Fe4383, (10) Ca4455, (11) Fe4531, (12) Fe4668, (13) Hβ, (14) Fe5015, (15) Mg1, (16) Mg2, (17) Mgb, (18) Fe5270, (19) Fe5335, (20) Fe5406, (21) Fe5709, (22) Fe5782,  (23) NaD, (24) TiO1, (25) TiO2, (26) HδA, (27) HγA, (28) HδF, (29) HγF, (30) D4000, (31) CaT*, (32) PaT,(33) CaT,(34) sTiO, (35) MgI, (36) DCO

HEADER_ssp_li includes the appropriate header for these files.