Phosphorus chemistry in oxygen rich stars

Bernal, Jacob

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https://hdl.handle.net/2142/97008 Copy

Description

Title

Phosphorus chemistry in oxygen rich stars

Author(s)

Bernal, Jacob

Contributor(s)

• Ziurys, Lucy M.
• Anderson, Julie
• Schmidt, Deborah

Issue Date

2017-06-22

Keyword(s)

Atacama Large Millimeter/submillimeter Array (ALMA)'s molecular view

Abstract

Observations of PO and PN have been carried out at the Arizona Radio Observatory at 1, 2, and 3 mm. Multiple transitions of PO and PN have been detected towards the O-rich AGB stars TX Cam and RCas. Data obtained toward supergiant stars VY Canis Majoris and NML Cyg have also been analyzed. Abundances were obtained for these molecules in all four objects using the radiative transfer code ESCAPADE, which is suitable for symmetric and asymmetric stellar outflows. The abundances of PN and PO were found to be in the range 10$^{-8}$ - 10$^{-7}$ relative to H$_{2}$. While PN appears to be a parent molecule formed by LTE chemistry near the stellar photosphere, PO appears to be created further out from the star at r $>$ 400 R$_*$.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

eng

Permalink

http://hdl.handle.net/2142/97008

DOI

https://doi.org/10.15278/isms.2017.RF04

Copyright and License Information

Copyright 2017 Jacob Bernal

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