Open AccessA new synthetic model for asymptotic giant branch stars
Author(s) -
Izzard Robert G.,
Tout Christopher A.,
Karakas Amanda I.,
Pols Onno R.
Publication year - 2004
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2004.07446.x
Subject(s) - physics , asymptotic giant branch , metallicity , astrophysics , large magellanic cloud , stars , white dwarf , stellar evolution , luminosity , star formation , carbon star , small magellanic cloud , astronomy , galaxy
We present a synthetic model for thermally pulsing asymptotic giant branch (TPAGB) evolution constructed by fitting expressions to full evolutionary models in the metallicity range 0.0001 ≤ Z ≤ 0.02 . Our model includes parametrizations of third dredge‐up and hot‐bottom burning with mass and metallicity. The Large Magellanic Cloud and Small Magellanic Cloud carbon star luminosity functions are used to calibrate third dredge‐up. We calculate yields appropriate for galactic chemical evolution models for 1 H, 4 He, 12 C, 13 C, 14 N, 15 N, 16 O and 17 O. The initial–final mass relation is examined for our stars and found to fit to within 0.1 M ⊙ of the observations. We also reproduce well the white dwarf mass function for masses above about 0.58 M ⊙ . The new model is to be implemented in a rapid binary star evolution code.