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

Authors

• Alexandra Z. Greenbaum, University of Michigan, Ann Arbor
• Anthony Cheetham, Université de Genève
• Anand Sivaramakrishnan, Space Telescope Science Institute
• Fredrik T. Rantakyrö, Gemini ObservatorySouthern Operations Center
• Gaspard Duchêne, University of California, Berkeley
• Peter Tuthill, The University of Sydney
• Robert J. De Rosa, University of California, Berkeley
• Rebecca Oppenheimer, American Museum of Natural History
• Bruce Macintosh, Kavli Institute for Particle Astrophysics and Cosmology
• S. Mark Ammons, Lawrence Livermore National Laboratory
• Vanessa P. Bailey, Jet Propulsion Laboratory
• Travis Barman, The University of Arizona
• Joanna Bulger, National Institutes of Natural Sciences - National Astronomical Observatory of Japan
• Andrew Cardwell, The University of Arizona
• Jeffrey Chilcote, University of Notre Dame
• Tara Cotten, University of Georgia
• Rene Doyon, Institut de Recherche sur les Exoplanètes
• Michael P. Fitzgerald, University of California, Los Angeles
• Katherine B. Follette, Amherst College
• Benjamin L. Gerard, University of Victoria
• Stephen J. Goodsell, Gemini Observatory
• James R. Graham, University of California, Berkeley
• Pascale Hibon, Gemini ObservatorySouthern Operations Center
• Li Wei Hung, University of California, Los Angeles
• Patrick Ingraham, Large Synoptic Survey Telescope
• Paul Kalas, University of California, Berkeley
• Quinn Konopacky, Center for Astrophysics & Space Sciences
• James E. Larkin, University of California, Los Angeles
• Jérôme Maire, Center for Astrophysics & Space Sciences
• Franck Marchis, SETI Institute
• Mark S. Marley, NASA Ames Research Center
• Christian Marois, University of Victoria
• Kimberly Ward-Duong, Amherst CollegeFollow
• et al, Various Institutions

Document Type

Article

Publication Date

1-1-2019

Publication Title

Astronomical Journal

Abstract

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.

Keywords

instrumentation: adaptive optics, stars: individual (HR 2690, HD 142527), techniques: high angular resolution

Volume

157

Issue

6

DOI

https://doi.org/10.3847/1538-3881/ab17db

ISSN

00046256

Rights

© 2019. The American Astronomical Society.

Version

Version of Record

Recommended Citation

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; Ward-Duong, Kimberly; and al, et, "Performance of the Gemini Planet Imager Non-Redundant Mask and Spectroscopy of Two Close-Separation Binaries: HR 2690 and HD 142527" (2019). Astronomy: Faculty Publications, Smith College, Northampton, MA.
https://scholarworks.smith.edu/ast_facpubs/119