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Journal Article

Why chromatic imaging matters

MPS-Authors

Sanchez-Bermudez,  Joel
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Millour,  Florentin
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Baron,  Fabien
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

van Boekel,  Roy
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bourgès,  Laurent
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Duvert,  Gilles
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Garcia,  Paulo J. V.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Gomes,  Nuno
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Hofmann,  Karl-Heinz
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Henning,  Thomas
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Isbell,  Jacob W.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Lopez,  Bruno
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Matter,  Alexis
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Pott,  J. -Uwe
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Schertl,  Dieter
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Thiébaut,  Eric
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Weigelt,  Gerd
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Young,  John
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2018ExA....46..457S
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Citation

Sanchez-Bermudez, J., Millour, F., Baron, F., van Boekel, R., Bourgès, L., Duvert, G., et al. (2018). Why chromatic imaging matters. Experimental Astronomy, 46, 457-473.


Cite as: https://hdl.handle.net/21.11116/0000-0005-CB4E-0
Abstract
During the last two decades, the first generation of beam combiners at the Very Large Telescope Interferometer has proved the importance of optical interferometry for high-angular resolution astrophysical studies in the near- and mid-infrared. With the advent of 4-beam combiners at the VLTI, the u - v coverage per pointing increases significantly, providing an opportunity to use reconstructed images as powerful scientific tools. Therefore, interferometric imaging is already a key feature of the new generation of VLTI instruments, as well as for other interferometric facilities like CHARA and JWST. It is thus imperative to account for the current image reconstruction capabilities and their expected evolutions in the coming years. Here, we present a general overview of the current situation of optical interferometric image reconstruction with a focus on new wavelength-dependent information, highlighting its main advantages and limitations. As an Appendix we include several cookbooks describing the usage and installation of several state-of-the art image reconstruction packages. To illustrate the current capabilities of the software available to the community, we recovered chromatic images, from simulated MATISSE data, using the MCMC software SQUEEZE. With these images, we aim at showing the importance of selecting good regularization functions and their impact on the reconstruction.