Performance of the Gemini Planet Imager Non-redundant Mask and Spectroscopy of Two Close-separation Binaries: HR 2690 and HD 142527

Greenbaum, Alexandra Z.; Cheetham, Anthony; Sivaramakrishnan, Anand; Rantakyrö, Fredrik T.; Duchêne, Gaspard; Tuthill, Peter; De Rosa, Robert J.; Oppenheimer, Rebecca; Macintosh, Bruce; Ammons, S. Mark; Bailey, Vanessa P.; Barman, Travis; Bulger, Joanna; Cardwell, Andrew; Chilcote, Jeffrey; Cotten, Tara; Doyon, Rene; Fitzgerald, Michael P.; Follette, Katherine B.; Gerard, Benjamin L.; Goodsell, Stephen J.; Graham, James R.; Hibon, Pascale; Hung, Li-Wei; Ingraham, Patrick; Kalas, Paul; Konopacky, Quinn; Larkin, James E.; Maire, Jérôme; Marchis, Franck; Marley, Mark S.; Marois, Christian; Metchev, Stanimir; Millar-Blanchaer, Maxwell A.; Morzinski, Katie M.; Nielsen, Eric L.; Palmer, David; Patience, Jennifer; Perrin, Marshall; Poyneer, Lisa; Pueyo, Laurent; Rajan, Abhijith; Rameau, Julien; Sadakuni, Naru; Savransky, Dmitry; Schneider, Adam C.; Song, Inseok; Soummer, Remi; Thomas, Sandrine; Wallace, J. Kent; Wang, Jason J.; Ward-Duong, Kimberly; Wiktorowicz, Sloane; Wolff, Schuyler

doi:10.3847/1538-3881/ab17db

Title: Performance of the Gemini Planet Imager Non-redundant Mask and Spectroscopy of Two Close-separation Binaries: HR 2690 and HD 142527

Journal Article · Mon Jun 03 00:00:00 EDT 2019 · The Astronomical Journal (Online)

DOI:https://doi.org/10.3847/1538-3881/ab17db· OSTI ID:1643760

;

; Duchêne, Gaspard; Tuthill, Peter; De Rosa, Robert J.;

;

; Ammons, S. Mark;

;

; Cardwell, Andrew;

;

; Doyon, Rene;

;

The Gemini Planet Imager (GPI) contains a 10-hole non-redundant mask (NRM), enabling interferometric resolution in complement to its coronagraphic capabilities. The NRM operates both in spectroscopic (integral field spectrograph, henceforth IFS) and polarimetric configurations. NRM observations were taken between 2013 and 2016 to characterize its performance. Most observations were taken in spectroscopic mode, with the goal of obtaining precise astrometry and spectroscopy of faint companions to bright stars. We find a clear correlation between residual wavefront error measured by the adaptive optic system and the contrast sensitivity by comparing phase errors in observations of the same source, taken on different dates. We find a typical 5σ contrast sensitivity of (2–3) × 10^–3 at $~λ/D$. We explore the accuracy of spectral extraction of secondary components of binary systems by recovering the signal from a simulated source injected into several data sets. We outline data reduction procedures unique to GPI's IFS and describe a newly public data pipeline used for the presented analyses. We demonstrate recovery of astrometry and spectroscopy of two known companions to HR 2690 and HD 142527. NRM+polarimetry observations achieve differential visibility precision of σ ~ 0.4% in the best case. We discuss its limitations on Gemini-S/GPI for resolving inner regions of protoplanetary disks and prospects for future upgrades. We summarize lessons learned in observing with NRM in spectroscopic and polarimetric modes.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); National Aeronautics and Space Administration (NASA)

Contributing Organization:: GPIES Team

Grant/Contract Number:: AC52-07NA27344; DGE1232825; APRA08-0117; AST-1411868; NNX14AJ80G

OSTI ID:: 1643760

Report Number(s):: LLNL-JRNL-804298; 1007268; TRN: US2201966

Journal Information:: The Astronomical Journal (Online), Vol. 157, Issue 6; ISSN 1538-3881

Publisher:: IOP Publishing - AAASCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 3 works

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