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Detecting and characterizing close-in exoplanets with vortex fiber nulling

Echeverri, Daniel and Ruane, Garreth J. and Calvin, Benjamin and Jovanovic, Nemanja and Delorme, Jacques-Robert and Wang, Jason and Millar-Blanchaer, Maxwell and Mawet, Dimitri and Serabyn, Eugene and Wallace, J. Kent and Martin, Stefan (2020) Detecting and characterizing close-in exoplanets with vortex fiber nulling. In: Optical and Infrared Interferometry and Imaging VII. Proceedings of SPIE. No.11446. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 1144619. ISBN 9781510636798.

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Vortex Fiber Nulling (VFN) is an interferometric method for suppressing starlight to detect and spectroscopically characterize exoplanets. It relies on a vortex phase mask and single-mode fiber to reject starlight while simultaneously coupling up to 20% of the planet light at separations of ≾ 1λ/D, thereby enabling spectroscopic characterization of a large population of RV and transit-detected planets, among others, that are inaccessible to conventional coronagraphs. VFN has been demonstrated in the lab at visible wavelengths and here we present the latest results of these experiments. This includes polychromatic nulls of 5 10⁻⁴ in 10% bandwidth light centered around 790 nm. An upgraded testbed has been designed and is being built in the lab now; we also present a status update on that work here. Finally, we present preliminary K-band (2 micron) fiber nulling results with the infrared mask that will be used on-sky as part of a VFN mode for the Keck Planet Imager and Characterizer Instrument in 2021.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Paper
Echeverri, Daniel0000-0002-1583-2040
Ruane, Garreth J.0000-0003-4769-1665
Jovanovic, Nemanja0000-0001-5213-6207
Wang, Jason0000-0003-0774-6502
Millar-Blanchaer, Maxwell0000-0001-6205-9233
Mawet, Dimitri0000-0002-8895-4735
Wallace, J. Kent0000-0001-5299-6899
Additional Information:© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). Daniel Echeverri is supported by a NASA Future Investigators in NASA Earth and Space Science and Technology (FINESST) fellowship under award #80NSSC19K1423. This work was supported by the Heising-Simons Foundation through grants #2019-1312 and #2015-129. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration (80NM0018D0004). The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.
Group:Astronomy Department
Funding AgencyGrant Number
NASA Earth and Space Science Fellowship80NSSC19K1423
Heising-Simons Foundation2019-1312
Heising-Simons Foundation2015-129
Subject Keywords:Exoplanets, Interferometry, Instrumentation, High Dispersion Coronagraphy, Keck Telescope, Fiber Nulling
Series Name:Proceedings of SPIE
Issue or Number:11446
Record Number:CaltechAUTHORS:20201222-074738306
Persistent URL:
Official Citation:Daniel Echeverri, Garreth Ruane, Benjamin Calvin, Nemanja Jovanovic, Jacques-Robert Delorme, Jason Wang, Maxwell Millar-Blanchaer, Dimitri Mawet, Eugene Serabyn, J. Kent Wallace, and Stefan Martin "Detecting and characterizing close-in exoplanets with vortex fiber nulling", Proc. SPIE 11446, Optical and Infrared Interferometry and Imaging VII, 1144619 (13 December 2020);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107248
Deposited By: Tony Diaz
Deposited On:22 Dec 2020 16:29
Last Modified:16 Nov 2021 19:00

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