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| Paper: |
Uncovering the Pulsating Photospheres of Mira Stars through
Near-IR Interferometry: A Case Study on R Vir |
| Volume: |
445, Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants |
| Page: |
157 |
| Authors: |
Hillen, M.; Verhoelst, T.; Acke, B.; Degroote, P. |
| Abstract: |
We present the methodology and some preliminary results of our study
of the relationship between a Mira’s pulsating photosphere and its
surrounding molecular layer(s) throughout several pulsation cycles,
based on spatially resolved data. Our dataset consists of archival
narrow-band observations in the near-infrared H and K bands
obtained with the Palomar Testbed Interferometer between 1999 and
2006, extended with a few nights of VLTI AMBER low spectral
resolution data and near-infrared SAAO photometry. The fitted model
is the geometric star + layer model proposed by Perrin et al. (2004),
in which the physical parameters (diameter and temperature of star
and layer; wavelength dependent optical depth of the layer) are
given a sinusoidal time dependence. |
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