TY - JOUR
T1 - Constraining the thermally pulsing asymptotic giant branch phase with resolved stellar populations in the Large Magellanic Cloud
AU - Pastorelli, Giada
AU - Marigo, Paola
AU - Girardi, Léo
AU - Aringer, Bernhard
AU - Chen, Yang
AU - Rubele, Stefano
AU - Trabucchi, Michele
AU - Bladh, Sara
AU - Boyer, Martha L.
AU - Bressan, Alessandro
AU - Dalcanton, Julianne J.
AU - Groenewegen, Martin A. T.
AU - Lebzelter, Thomas
AU - Mowlavi, Nami
AU - Chubb, Katy L.
AU - Cioni, Maria-Rosa L.
AU - De Grijs, Richard
AU - Ivanov, Valentin D.
AU - Nanni, Ambra
AU - van Loon, Jacco Th
AU - Zaggia, Simone
N1 - This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, Volume 498, Issue 3, November 2020, Pages 3283–3301, https://doi.org/10.1093/mnras/staa2565. Copyright 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
PY - 2020/11/1
Y1 - 2020/11/1
N2 - Reliable models of the thermally pulsing asymptotic giant branch (TP-AGB) phase are of critical importance across astrophysics, including our interpretation of the spectral energy distribution of galaxies, cosmic dust production, and enrichment of the interstellar medium. With the aim of improving sets of stellar isochrones that include a detailed description of the TP-AGB phase, we extend our recent calibration of the AGB population in the Small Magellanic Cloud (SMC) to the more metal-rich Large Magellanic Cloud (LMC). We model the LMC stellar populations with the trilegal code, using the spatially resolved star formation history derived from the VISTA survey. We characterize the efficiency of the third dredge-up by matching the star counts and the Ks-band luminosity functions of the AGB stars identified in the LMC. In line with previous findings, we confirm that, compared to the SMC, the third dredge-up in AGB stars of the LMC is somewhat less efficient, as a consequence of the higher metallicity. The predicted range of initial mass of C-rich stars is between Mi ≈ 1.7 and 3 M⊙ at Zi = 0.008. We show how the inclusion of new opacity data in the carbon star spectra will improve the performance of our models. We discuss the predicted lifetimes, integrated luminosities, and mass-loss rate distributions of the calibrated models. The results of our calibration are included in updated stellar isochrones publicly available.
AB - Reliable models of the thermally pulsing asymptotic giant branch (TP-AGB) phase are of critical importance across astrophysics, including our interpretation of the spectral energy distribution of galaxies, cosmic dust production, and enrichment of the interstellar medium. With the aim of improving sets of stellar isochrones that include a detailed description of the TP-AGB phase, we extend our recent calibration of the AGB population in the Small Magellanic Cloud (SMC) to the more metal-rich Large Magellanic Cloud (LMC). We model the LMC stellar populations with the trilegal code, using the spatially resolved star formation history derived from the VISTA survey. We characterize the efficiency of the third dredge-up by matching the star counts and the Ks-band luminosity functions of the AGB stars identified in the LMC. In line with previous findings, we confirm that, compared to the SMC, the third dredge-up in AGB stars of the LMC is somewhat less efficient, as a consequence of the higher metallicity. The predicted range of initial mass of C-rich stars is between Mi ≈ 1.7 and 3 M⊙ at Zi = 0.008. We show how the inclusion of new opacity data in the carbon star spectra will improve the performance of our models. We discuss the predicted lifetimes, integrated luminosities, and mass-loss rate distributions of the calibrated models. The results of our calibration are included in updated stellar isochrones publicly available.
KW - Magellanic Clouds
KW - stars: AGB and post-AGB
KW - stars: evolution
UR - http://www.scopus.com/inward/record.url?scp=85096880768&partnerID=8YFLogxK
U2 - 10.1093/mnras/staa2565
DO - 10.1093/mnras/staa2565
M3 - Article
AN - SCOPUS:85096880768
SN - 0035-8711
VL - 498
SP - 3283
EP - 3301
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 3
ER -