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SPIRou is a near-infrared (nIR) spectropolarimeter/velocimeter mounted at the Canada-France-Hawaii Telescope (CFHT), which focuses on two forefront science topics, (i) the quest for planets and planetary systems around nearby M stars and (ii) the study of low-mass star/planet formation in the presence of magnetic fields. SPIRou also efficiently tackles key programs beyond these twin main goals, in particular the study and characterization of exoplanet atmospheres. SPIRou covers a wide spectral domain in a single exposure (0.95–2.50 μm) at a resolving power of 70,000, yielding unpolarized and polarized spectra of low-mass stars with a 10% peak throughput at a radial velocity precision of about 1–2 m s−1 RMS. It consists of a Cassegrain unit mounted at the Cassegrain focus of CFHT and featuring an achromatic polarimeter, coupled to a cryogenic spectrograph cooled down at 75 K through a fluoride fiber link. SPIRou was installed on CFHT in 2018 and has since become the most used CFHT instrument, carrying out science programs for the community since early 2019, in particular the SPIRou Legacy Survey and SPICE large programs totaling 485 telescope nights and focusing on the twin main science goals.

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Velocimetry and Spectropolarimetry with SPIRou at CFHT

  • 动态工具书词条

  • 发表日期：

    2025年

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  • J. -F. Donati,
  • C. Moutou,
  • D. Kouach,
  • M. Lacombe,
  • S. Baratchart,
  • R. Doyon,
  • X. Delfosse,
  • E. Artigau,
  • N. Cook,
  • A. Carmona,
  • G. Hébrard,
  • J. Bouvier,
  • S. Alencar,
  • G. Barrick,
  • L. Arnold,
  • Z. Challita,
  • E. Martioli,
  • F. Debras,
  • The SPIRou Team

摘要

SPIRou is a near-infrared (nIR) spectropolarimeter/velocimeter mounted at the Canada-France-Hawaii Telescope (CFHT), which focuses on two forefront science topics, (i) the quest for planets and planetary systems around nearby M stars and (ii) the study of low-mass star/planet formation in the presence of magnetic fields. SPIRou also efficiently tackles key programs beyond these twin main goals, in particular the study and characterization of exoplanet atmospheres. SPIRou covers a wide spectral domain in a single exposure (0.95–2.50 μm) at a resolving power of 70,000, yielding unpolarized and polarized spectra of low-mass stars with a 10% peak throughput at a radial velocity precision of about 1–2 m s−1 RMS. It consists of a Cassegrain unit mounted at the Cassegrain focus of CFHT and featuring an achromatic polarimeter, coupled to a cryogenic spectrograph cooled down at 75 K through a fluoride fiber link. SPIRou was installed on CFHT in 2018 and has since become the most used CFHT instrument, carrying out science programs for the community since early 2019, in particular the SPIRou Legacy Survey and SPICE large programs totaling 485 telescope nights and focusing on the twin main science goals.