SPIRou: the near-infrared spectropolarimeter/high-precision velocimeter for the Canada-France-Hawaii telescope

Artigau, Étienne; Kouach, Driss; Donati, J.‐F.; Doyon, René; Delfosse, X.; Baratchart, Sébastien; Lacombe, M.; Moutou, C.; Rabou, Patrick; Parès, L.; Micheau, Yoan; Thibault, Simon; Решетов, В. А.; Dubois, B.; Hernandez, O.; Vallée, Philippe; Wang, Shiang‐Yu; Dolon, F.; Pepe, F.; Bouchy, F.; Striebig, Nicolas; Hénault, François; Loop, David; Saddlemyer, Leslie; Barrick, Gregory; Vermeulen, Tom; Dupieux, M.; Hébrard, G.; Boisse, I.; Martioli, Eder; Alencar, S. H. P.; J.-D., Do Nascimento,; Figueira, P.

doi:10.1117/12.2055663

Cited by 94 publications

(26 citation statements)

References 8 publications

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“…However, a more effective approach is to perform targeted characterization of known planets detected via direct imaging at shorter wavelengths, RV (with e.g. SPIRou; Artigau et al 2014), and astrometry (with e.g. Gaia; Perryman et al 2014).…”

Section: New Scientific Opportunitiesmentioning

confidence: 99%

Efficient Spectroscopy of Exoplanets at Small Angular Separations with Vortex Fiber Nulling

Ruane

Mawet

et al. 2018

ApJ

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Instrumentation designed to characterize potentially habitable planets may combine adaptive optics and high-resolution spectroscopy techniques to achieve the highest possible sensitivity to spectral signs of life. Detecting the weak signal from a planet containing biomarkers will require exquisite control of the optical wavefront to maximize the planet signal and significantly reduce unwanted starlight. We present an optical technique, known as vortex fiber nulling (VFN), that allows polychromatic light from faint planets at extremely small separations from their host stars ( λ/D) to be efficiently routed to a diffraction-limited spectrograph via a single-mode optical fiber, while light from the star is prevented from entering the spectrograph. VFN takes advantage of the spatial selectivity of a single-mode fiber to isolate the light from close-in companions in a small field of view around the star. We provide theoretical performance predictions of a conceptual design and show that VFN may be utilized to characterize planets detected by radial velocity (RV) instruments in the infrared without knowledge of the azimuthal orientation of their orbits. Using a spectral template-matching technique, we calculate an integration time of ∼400, ∼100, and ∼30 hr for Ross 128 b with Keck, the Thirty Meter Telescope (TMT), and the Large Ultraviolet/Optical/Infrared (LUVOIR) Surveyor, respectively.

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Section: New Scientific Opportunitiesmentioning

confidence: 99%

Efficient Spectroscopy of Exoplanets at Small Angular Separations with Vortex Fiber Nulling

Ruane

Mawet

et al. 2018

ApJ

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“…Super-Earths can be found with either high-precision RV observations or space-based transit searches. Such high-precision RV surveys include those being undertaken currently with HARPS (e.g., Díaz et al 2016), HARPS-N (M15), APF (Vogt et al 2014), and CHIRON (Tokovinin et al 2013), and in the near future with MINERVA (Swift et al 2015), CARMENES (Quirrenbach et al 2014), ESPRESSO (Mégevand et al 2014), and SPIRou (Artigau et al 2014). The major upcoming space-based transit survey is that of TESS (Ricker et al 2015).…”

Section: Introductionmentioning

confidence: 99%

A 12-Year Activity Cycle for the Nearby Planet Host Star Hd 219134

Johnson

Endl

Cochran

et al. 2016

ApJ

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The nearby (6.5 pc) star HD 219134 was recently shown by Motalebi et al. and Vogt et al. to host several planets, the innermost of which is transiting. We present 27 years of radial velocity (RV) observations of this star from the McDonald Observatory Planet Search program, and 19 years of stellar activity data. We detect a long-period activity cycle measured in the Ca II S HK index, with a period of 4230±100 days (11.7 years), very similar to the 11 year solar activity cycle. Although the period of the Saturn-mass planet HD 219134 h is close to half that of the activity cycle, we argue that it is not an artifact due to stellar activity. We also find a significant periodicity in the S HK data due to stellar rotation with a period of 22.8 days. This is identical to the period of planet f identified by Vogt et al., suggesting that this RV signal might be caused by rotational modulation of stellar activity rather than a planet. Analysis of our RVs allows us to detect the long-period planet HD 219134 h and the transiting super-Earth HD 219134 b. Finally, we use our long time baseline to constrain the presence of longer period planets in the system, excluding to s 1 objects with

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“…We consider that molecular nitrogen could well be considered as a convenient reference, not only in the laboratory, but also for forthcoming high-resolution near IR telescope-based spectrographs, such as SPIRou [57]. Figure 10.…”

Section: Applicationsmentioning

confidence: 99%

The spectrum of N2 from 4,500 to 15,700 cm−1 revisited with pgopher

Western

Carter-Blatchford

Crozet

et al. 2018

Journal of Quantitative Spectroscopy and Radiative Transfer

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Using a reference molecular atlas to ensure self-consistency of wavelength calibration is widespread practice. Boesch & Reiners (Astronomy & Astrophysics 582 A43 (2015)) reported a line list from a discharge of molecular nitrogen from 4500 to 11000 cm −1 for this purpose. With a hollow-cathode discharge source, we have extended the experimental spectrum up to 15700 cm −1 , to include the range of Ti:sapphire lasers, since the density of N 2 lines is greater than atomic atlases in common use. Recognizing that experimental conditions can vary, we have also analysed the spectra (comprising several B ³Π g -A ³Σ u + , B' ³Σ u − -B ³Π g , and W ³Δ u -B ³Π g N 2 bands) with standard Hamiltonians, so that any part of the discharge spectrum 4500 -15700 cm −1 can be simulated. Parameters are given to do this with the spectral simulation and analysis package PGOPHER. (C. Western, J. Quant. Spectrosc.Rad. Transf., 186, 221 (2016)). The analysis also included high-level ab initio calculations of potential energy curves, transition moments and spin-orbit coupling constants and these were used in preparing the model, extending the potential range of applicability. The results are available in a variety of formats to suit possible applications, including the experimental spectrum in ASCII, a detailed line list with positions and Einstein A coefficients, and a PGOPHER input file to synthesize the spectrum at selectable temperature and resolution.

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SPIRou: the near-infrared spectropolarimeter/high-precision velocimeter for the Canada-France-Hawaii telescope

Cited by 94 publications

References 8 publications

Efficient Spectroscopy of Exoplanets at Small Angular Separations with Vortex Fiber Nulling

Efficient Spectroscopy of Exoplanets at Small Angular Separations with Vortex Fiber Nulling

A 12-Year Activity Cycle for the Nearby Planet Host Star Hd 219134

The spectrum of N2 from 4,500 to 15,700 cm−1 revisited with pgopher

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