Temporal changes in the infrared spectra of magellanic carbon stars

Sloan, G. C., Kraemer, K. E., Aringer, B., Cami, J., Eriksson, K., Höfner, S., Lagadec, E., Matsuura, M. ORCID: https://orcid.org/0000-0002-5529-5593, McDonald, I., Montiel, E., Sahai, R. and Zijlstra, A. A. 2024. Temporal changes in the infrared spectra of magellanic carbon stars. Galaxies 12 (5) , 61. 10.3390/galaxies12050061

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Abstract

A Medium-Resolution Spectrometer on a Mid-Infrared Instrument on the JWST obtained spectra of three carbon stars in the Large Magellanic Cloud. Two of the spectra differ significantly from spectra obtained ∼16–19 years earlier with the Infrared Spectrograph on the Spitzer Space Telescope. The one semi-regular variable among the three has changed little. The long-period Mira variable in the sample shows changes consistent with its pulsation cycle. The short-period Mira shows dramatic changes in the strength of its molecular absorption bands, with some bands growing weaker and some stronger. Whether these variations result from its pulsation cycle or its evolution is not clear.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Physics and Astronomy
Additional Information:	License information from Publisher: LICENSE 1: URL: https://creativecommons.org/licenses/by/4.0/, Start Date: 2024-10-09
Publisher:	MDPI
Date of First Compliant Deposit:	21 October 2024
Date of Acceptance:	1 October 2024
Last Modified:	21 Oct 2024 13:45
URI:	https://orca.cardiff.ac.uk/id/eprint/173182

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