Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The chemistry of extragalactic carbon stars   Prompted by the ongoing interest in Spitzer Infrared Spectrometer spectra of
carbon stars in the Large Magellanic Cloud, we have investigated the
circumstellar chemistry of carbon stars in low-metallicity environments.
Consistent with observations, our models show that acetylene is particularly
abundant in the inner regions of low metallicity carbon-rich AGB stars -- more
abundant than carbon monoxide. As a consequence, larger hydrocarbons have
higher abundances at the metallicities of the Magellanic Clouds than in stars
with solar metallicity. We also find the oxygen and nitrogen chemistry is
suppressed at lower metallicity, as expected. Finally, we calculate molecular
line emission from carbon stars in the Large and Small Magellanic Cloud and
find that several molecules should be readily detectable with the Atacama Large
Millimeter Array at Full Science operations.

23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an