Spitzer Observations of Large Amplitude Variables in the LMC and IC 1613 [GA]


The 3.6 and 4.5 micron characteristics of AGB variables in the LMC and IC1613 are discussed. For C-rich Mira variables there is a very clear period-luminosity-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] period-luminosity relation for dusty stars is approximately one mag brighter than for their naked counterparts with comparable periods.

Read this paper on arXiv…

P. Whitelock, M. Kasliwal and M. Boyer
Thu, 23 Feb 17

Comments: 5 pages, 4 figures, to appear in Proceedings of “Wide-Field Variability Surveys: A 21st Century Perspective”