Temporal Changes in the Infrared Spectra of Magellanic Carbon Stars

G. C. Sloan; K. E. Kraemer; B. Aringer; J. Cami; K. Eriksson; S. Höfner; E. Lagadec; M. Matsuura; I. McDonald; E. Montiel; R. Sahai; A. A. Zijlstra

doi:10.3390/galaxies12050061

Temporal Changes in the Infrared Spectra of Magellanic Carbon Stars

G. C. Sloan, K. E. Kraemer, B. Aringer, J. Cami, K. Eriksson, S. Höfner, E. Lagadec, M. Matsuura, I. McDonald, E. Montiel, R. Sahai, A. A. Zijlstra

Department of Astrophysics

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

The Medium-Resolution Spectrometer on the 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.

Original language	English
Article number	61
Number of pages	8
Journal	Galaxies
Volume	12
Issue number	5
DOIs	https://doi.org/10.3390/galaxies12050061
Publication status	Published - Oct 2024

Austrian Fields of Science 2012

103003 Astronomy
103004 Astrophysics

Keywords

circumstellar matter
dust
stars: AGB and post-AGB
stars: carbon

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10.3390/galaxies12050061Licence: CC BY 4.0

Cite this

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title = "Temporal Changes in the Infrared Spectra of Magellanic Carbon Stars",

abstract = "The Medium-Resolution Spectrometer on the 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.",

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doi = "10.3390/galaxies12050061",

language = "English",

volume = "12",

journal = "Galaxies",

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T1 - Temporal Changes in the Infrared Spectra of Magellanic Carbon Stars

AU - Sloan, G. C.

AU - Kraemer, K. E.

AU - Aringer, B.

AU - Cami, J.

AU - Eriksson, K.

AU - Höfner, S.

AU - Lagadec, E.

AU - Matsuura, M.

AU - McDonald, I.

AU - Montiel, E.

AU - Sahai, R.

AU - Zijlstra, A. A.

PY - 2024/10

Y1 - 2024/10

N2 - The Medium-Resolution Spectrometer on the 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.

AB - The Medium-Resolution Spectrometer on the 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.

KW - circumstellar matter

KW - dust

KW - stars: AGB and post-AGB

KW - stars: carbon

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U2 - 10.3390/galaxies12050061

DO - 10.3390/galaxies12050061

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VL - 12

JO - Galaxies

JF - Galaxies

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M1 - 61

ER -

Temporal Changes in the Infrared Spectra of Magellanic Carbon Stars

Abstract

Austrian Fields of Science 2012

Keywords

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