High Angular Resolution Stellar Imaging with Occultations from the Cassini Spacecraft II: Kronocyclic Tomography

Abstract

We present an advance in the use of Cassini observations of stellar occultations by the rings of Saturn for stellar studies. Stewart et al. (2013) demonstrated the potential use of such observations for measuring stellar angular diameters. Here, we use these same observations, and tomographic imaging reconstruction techniques, to produce two dimensional images of complex stellar systems. We detail the determination of the basic observational reference frame. A technique for recovering model-independent brightness profiles for data from each occulting edge is discussed, along with the tomographic combination of these profiles to build an image of the source star. Finally we demonstrate the technique with recovered images of the α Centauri binary system and the circumstellar environment of the evolved late-type giant star, Mira.

8 pages, 8 figures, Accepted by MNRAS

References in corpus (5)

• Scikit-learn: Machine Learning in Python
• Constraining the difference in convective blueshift between the components of alpha Cen with precise radial velocities
• The time variation in infrared water-vapour bands in Mira variables
• Multi-wavelength diffraction-limited imaging of the evolved carbon star IRC +10216, II
• High Angular Resolution Stellar Imaging with Occultations from the Cassini Spacecraft I: Observational Technique

Cited by in corpus (5)

• The weather report from IRC+10216: Evolving irregular clouds envelop carbon star
• New Measurements of the Radio Photosphere of Mira based on Data from the JVLA and ALMA
• An atlas of bright star spectra in the near infrared from Cassini-VIMS
• Lunar occultations with Aqueye+ and Iqueye
• Sampling the Fourier transform along radial lines