LINKING CHEMISTRY AND KINEMATICS IN THE MOLECULAR GAS OF PROTOPLANETARY NEBULA M1-92

Gold, Katherine R.

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Description

Title

LINKING CHEMISTRY AND KINEMATICS IN THE MOLECULAR GAS OF PROTOPLANETARY NEBULA M1-92

Author(s)

Gold, Katherine R.

Contributor(s)

• Khattab, Omar
• Schmidt, Deborah
• Ziurys, Lucy M.

Issue Date

2023-06-21

Keyword(s)

Astronomy

Abstract

Protoplanetary nebulae (PPNe) play a significant role in the evolution of low and intermediate mass stars, serving as the link between the asymptotic giant branch (AGB) and planetary nebulae phases. Previous observations have revealed that planetary nebulae are rich in molecular content that varies considerably from the AGB phase, suggesting that significant chemical transformations take place during the brief intermediate PPN stage. To further investigate this problem, we have conducted new molecular observations towards M1-92, an oxygen-rich, bipolar PPN. These measurements have been conducted using the using the Kitt Peak 12 m antenna and the Sub-Millimeter Telescope (SMT) of the Arizona Radio Observatory, as well as the IRAM 30 m telescope. These observations have extended the molecular identifications to include CN, HCO⁺, H¹³CO⁺, HCN, HNC, H₂CO, H₂S, SO₂, SiO, Si¹⁷O, and other isotopologues of these species. Further, some spectra, for example, CS, contain at least five velocity components, tracing the equatorial disk of the nebula, the bipolar lobes and the bipolar tips. The “tips” may track a high velocity wind that has punctured through the slower-moving material in the lobes, sweeping up the lobe gas. These observations will be discussed, with implications for the chemical evolution in this O-rich PPN and its relationship to the kinematic structure.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Handle URL

https://hdl.handle.net/2142/122644

DOI

https://doi.org/10.15278/isms.2023.7162

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