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Chemical evolution of the Magellanic Clouds based on planetary nebulae
Astrophysics · Submitted 13 Aug 2008
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We show that these results have an important consequence on the star formation rate of the SMC, in particular by suggesting a star formation burst in the last 2-3 Gyr.
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The abstract, sentence by sentence
Planetary nebulae (PN) are an essential tool in the study of the chemical evolution of the Milky Way and galaxies of the Local Group, particularly the Magellanic Clouds. In this work, we present some recent results on the determination of chemical abundances from PN in the Large and Small Magellanic clouds, and compare these results with data from our own Galaxy and other galaxies in the Local Group. As a result of our continuing long term program, we have a large database comprising about 300 objects for which reliable abundances of several elements from He to Ar have been obtained. Such data can be used to derive constraints to the nucleosynthesis processes in the progenitor stars in galaxies of different metallicities. We also investigate the time evolution of the oxygen abundances in the SMC by deriving the properties of the PN progenitor stars, which include their masses and ages. We have then obtained an age-metallicity relation taking into account both oxygen and [Fe/H] abundances. We show that these results have an important consequence on the star formation rate of the SMC, in particular by suggesting a star formation burst in the last 2-3 Gyr.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Planetary nebulae (PN) are an essential tool in the study of the chemical evolution of the Milky Way and galaxies of the Local Group, particularly the Magellanic Clouds. | background 1.00 | 0.05 | 0.02 | asserted 1.00 |
| s1 | In this work, we present some recent results on the determination of chemical abundances from PN in the Large and Small Magellanic clouds, and compare these results with data from our own Galaxy and other galaxies in the Local Group. | contribution 1.00 | 0.89 | 0.04 | asserted 0.85 |
| s2 | As a result of our continuing long term program, we have a large database comprising about 300 objects for which reliable abundances of several elements from He to Ar have been obtained. | method 0.55 | 0.96 | 0.03 | asserted 1.00 |
| s3 | Such data can be used to derive constraints to the nucleosynthesis processes in the progenitor stars in galaxies of different metallicities. | interpretation 0.53 | 0.16 | 0.04 | hedged possibility 0.76 |
| s4 | We also investigate the time evolution of the oxygen abundances in the SMC by deriving the properties of the PN progenitor stars, which include their masses and ages. | contribution 0.82 | 0.96 | 0.05 | asserted 0.97 |
| s5 | We have then obtained an age-metallicity relation taking into account both oxygen and [Fe/H] abundances. | result 0.67 | 0.96 | 0.09 | asserted 1.00 |
| s6 | We show that these results have an important consequence on the star formation rate of the SMC, in particular by suggesting a star formation burst in the last 2-3 Gyr. | interpretation 0.98 | 0.92 | 0.71 | hedged possibility 0.80 |
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Original abstract
Planetary nebulae (PN) are an essential tool in the study of the chemical evolution of the Milky Way and galaxies of the Local Group, particularly the Magellanic Clouds. In this work, we present some recent results on the determination of chemical abundances from PN in the Large and Small Magellanic clouds, and compare these results with data from our own Galaxy and other galaxies in the Local Group. As a result of our continuing long term program, we have a large database comprising about 300 objects for which reliable abundances of several elements from He to Ar have been obtained. Such data can be used to derive constraints to the nucleosynthesis processes in the progenitor stars in galaxies of different metallicities. We also investigate the time evolution of the oxygen abundances in the SMC by deriving the properties of the PN progenitor stars, which include their masses and ages. We have then obtained an age-metallicity relation taking into account both oxygen and [Fe/H] abundances. We show that these results have an important consequence on the star formation rate of the SMC, in particular by suggesting a star formation burst in the last 2-3 Gyr.
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Papers whose main result relates to this one's
States the same result 1 paper
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We discuss the implications of the derived age-metallicity relation for the SMC formation, in particular by suggesting a star formation burst in the last 2-3 Gyr.
Chemical evolution of the Small Magellanic Cloud based on planetary nebulae · 0.98
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