Cyclic Behaviors of Miras

From Creech-Eakman et al. (2015, in preparation)

In MCE+2015:

  • Wide-band \(m_{\rm K}\) normalized visibilities \(V\) as a function of MJD & \(B_{\rm projected}\)

    • Do not include raw visibilities? Simply note calibrator for each \(V\), give \(\theta_{\rm EST}\) for each calibrator?

  • Period: AAVSO, AFOEV source \(m_{\rm V}\) band data; \(P\) and \(JD_{\rm 0}\)

  • Contemporaneous broad-band photometry

    • \(m_{\rm V}\)-band: derived from ...?

    • \(m_{\rm K}\)-band: derived from PTI data, how...?

  • Wide-band \(m_{\rm K}\) UD angular size \(\theta\) as a function of MJD, phase[?], \(m_{\rm V}-m_{\rm K}\)[?]

  • Indexing proxies

    • Spectral type: Range of values from Skiff (2014) -> decompose into ST versus Phase? Concentrate on \(\phi_{\rm max}\) STs? Will be problematic with lack of data. But should be good(-ish) for separating into M/S/C

    • \(m_{\rm V}-m_{\rm K}\) color: contemporaneous data available, for indexing of individual data points. \(m_{\rm V}-m_{\rm K}\) ranges for stars (when sufficient phase coverage available)?

  • \(T_{\rm EFF}[?]\)

    • \(F_{\rm BOL}\) from \(F_{\rm BOL}\)(\(m_{\rm K}\)) in vB+2015 (in press).

Target Selection

Those Miras with number of nights observed \(N_{\rm nights}>\)25. [??]

Phase coverage criteria? [How to quantify?]

Spectral Type

Better-sampled stars will potentially have better range of values from Skiff (2014) -> decompose into ST versus Phase? Concentrate on \(\phi_{\rm max}\) STs?

Distances

Period-Luminosity(\(m_{\rm K}\)) relationship of TBD[?]. Note: absolute values will probably be off, but main emphasis for Cycle paper is relative changes

Cyclic Fitting

Phase = \(\phi\) [Better symbol choice?]

\(T_{\rm EFF}\) versus \(\phi\). Amplitude, average. Deviations from sinusoidal behavior? Phase offsets from \(m_{\rm V,max}\).

\(R\) versus \(\phi\). Amplitude, average. Deviations from sinusoidal behavior? Phase offsets from \(m_{\rm V,max}\).

\(T_{\rm EFF}\) versus \(R\).

Higher order fitting? Additional sinusoids (“harmonics”[?])

General Properties

By chemical type (M/S/C). Potential mis-identified stars?

References

  1. B. A. Skiff. VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications (Skiff, 2009-2014). VizieR Online Data Catalog 1, 2023 (2014).