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Published September 8, 2017 | Published
Journal Article Open

Spitzer observations of large amplitude variables in the LMC and IC 1613

Abstract

The 3.6 and 4.5 µm characteristics of asymptotic giant branch variables in the LMC and IC 1613 are discussed. For C-rich Mira variables there is a very clear periodluminosity-colour relation, where the [3.6] . [4.5] colour is associated with the amount of circumstellar material and correlated with the pulsation amplitude. The [4.5] periodluminosity relation for dusty stars is approximately one mag brighter than for their naked counterparts with comparable periods.

Additional Information

© 2017 The Authors, published by EDP Sciences. This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Published online: 8 September 2017. This work makes use of VizieR, the CDS catalogue service, and the TOPCAT ([12]) data processing package. PAW acknowledges the receipt of a research grant from the South African National Research Foundation (NRF).

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August 19, 2023
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