############ Known Issues ############ Star Types not Included in Stellar Models ========================================= The BEAST includes several different stellar libraries and isochrones to cover as much of the H-R diagram as possible. Stellar types that are not included in these libraries will be poorly fit, sometimes outputting nonsensical stellar parameters. Asymptotic Giant Branch (AGB) Stars ----------------------------------- The BEAST does not yet include stellar libraries that include thermally-pulsing (TP-)AGB stars. TP-AGB stars often have a large amount of circumstellar dust, causing significant extinction at shorter wavelengths. The BEAST currently identifies many of these objects as very luminous, massive stars with a unrealistic amount of interstellar extinction. Future BEAST versions will include AGB libraries. The images below show BEAST results for a test dataset with known M type and C type AGB stars. If the AGB stars were correctly fit, they would have cooler effective temperatures (log T = 3.4 - 3.6) and lower initial masses (<8 M_sun). .. image:: agb_av.png :width: 400 :alt: Alternative text .. image:: agb_mini.png :width: 400 :alt: Alternative text