TY - JOUR
T1 - The progenitors and lifetimes of planetary nebulae
AU - Badenes, Carles
AU - Maoz, Dan
AU - Ciardullo, Robin
N1 - Publisher Copyright:
© 2015. The American Astronomical Society. All rights reserved.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - Planetary nebulae (PNe) are among the most spectacular objects produced by stellar evolution, but the exact identity of their progenitors has never been established for a large and homogeneous sample. We investigate the relationship between PNe and their stellar progenitors in the LMC by means of a statistical comparison between a highly complete spectroscopic catalog of PNe and the spatially resolved age distribution of the underlying stellar populations. We find that most PN progenitors in the LMC have main-sequence lifetimes in a narrow range between 5 and 8 Gyr, which corresponds to masses between 1.2 and 1.0 M⊙, and produce PNe that are visible for 27 ± 6 kyr. We tentatively detect a second population of PN progenitors, with main-sequence lifetimes between 35 and 800 Myr, masses between 8.2 and 2.1 M⊙, and average PN lifetimes of 11+6-8 kyr. These two distinct and disjointed populations strongly suggest the existence of at least two physically distinct formation channels for PNe. Our determination of PN lifetimes and progenitor masses has implications for the understanding of PNe in the context of stellar evolution models, and for the role that rotation, magnetic fields, and binarity can play in the shaping of PN morphologies.
AB - Planetary nebulae (PNe) are among the most spectacular objects produced by stellar evolution, but the exact identity of their progenitors has never been established for a large and homogeneous sample. We investigate the relationship between PNe and their stellar progenitors in the LMC by means of a statistical comparison between a highly complete spectroscopic catalog of PNe and the spatially resolved age distribution of the underlying stellar populations. We find that most PN progenitors in the LMC have main-sequence lifetimes in a narrow range between 5 and 8 Gyr, which corresponds to masses between 1.2 and 1.0 M⊙, and produce PNe that are visible for 27 ± 6 kyr. We tentatively detect a second population of PN progenitors, with main-sequence lifetimes between 35 and 800 Myr, masses between 8.2 and 2.1 M⊙, and average PN lifetimes of 11+6-8 kyr. These two distinct and disjointed populations strongly suggest the existence of at least two physically distinct formation channels for PNe. Our determination of PN lifetimes and progenitor masses has implications for the understanding of PNe in the context of stellar evolution models, and for the role that rotation, magnetic fields, and binarity can play in the shaping of PN morphologies.
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U2 - 10.1088/2041-8205/804/1/L25
DO - 10.1088/2041-8205/804/1/L25
M3 - Article
AN - SCOPUS:84940103019
SN - 2041-8205
VL - 804
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 1
M1 - L25
ER -