Observing Exoplanets with the James Webb Space Telescope

Beichman, Charles; Greene, Thomas P.

doi:10.1007/978-3-319-30648-3_85-1

Cited by 3 publications

(4 citation statements)

References 75 publications

(77 reference statements)

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“…The high-quality spectra are obtained thanks to high-contrast instruments on large-aperture ground-based telescopes operating in the near-infrared e.g., Keck (129), GPI on Gemini (93), SCExAO on Subaru (117), SPHERE on VLT (29). In the near future, the JWST will provide a high-stability platform for high-contrast imaging and spectroscopy in the near-mid infrared from space (21). In the late 2020s, NASA's WFIRST mission is expected provide another space-based platform for direct imaging of giant exoplanets, particularly in the optical.…”

Section: Direct Imagingmentioning

confidence: 99%

Exoplanetary Atmospheres: Key Insights, Challenges, and Prospects

Madhusudhan

2019

Annu. Rev. Astron. Astrophys.

327

227

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Exoplanetary science is on the verge of an unprecedented revolution. The thousands of exoplanets discovered over the past decade have most recently been supplemented by discoveries of potentially habitable planets around nearby low-mass stars. Currently, the field is rapidly progressing towards detailed spectroscopic observations to characterise the atmospheres of these planets. While various surveys from space and ground are expected to detect numerous more exoplanets orbiting nearby stars, the imminent launch of JWST along with large groundbased facilities are expected to revolutionise exoplanetary spectroscopy. Such observations, combined with detailed theoretical models and inverse methods, provide valuable insights into a wide range of physical processes and chemical compositions in exoplanetary atmospheres. Depending on the planetary properties, the knowledge of atmospheric compositions can also place important constraints on planetary formation and migration mechanisms, geophysical processes and, ultimately, biosignatures. In the present review, we will discuss the modern and future landscape of this frontier area of exoplanetary atmospheres. We will start with a brief review of the area, emphasising the key insights gained from different observational methods and theoretical studies. This is followed by an in-depth discussion of the state-of-the-art, challenges, and future prospects in three forefront branches of the area. 2 N. Madhusudhan 6 N. Madhusudhan 28 N. Madhusudhan 42 N. Madhusudhan

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Section: Direct Imagingmentioning

confidence: 99%

Exoplanetary Atmospheres: Key Insights, Challenges, and Prospects

Madhusudhan

2019

Annu. Rev. Astron. Astrophys.

327

227

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“…The JWST is a well equipped telescope with four important instruments on board: the Near-Infrared Camera, or NIRCam [3], the Near-Infrared Spectrograph, or NIRSpec [12], the Mid-Infrared Instrument, or MIRI [6], and the Near InfraRed Imager and Slitless Spectrograph or NIRISS [15]. Each of these instruments operates in several observation modes: imaging and low, medium or high resolution spectroscopy, with or without the use of coronagraphs and filters.…”

Section: Jwst Mid-infrared Instrument (Miri) and Lrs-slitless Modementioning

confidence: 99%

“…One of them is the detection, observation and characterization of exoplanets; particularly the study of their atmospheres. Its instrumentation must be understood to find the most useful modes for characterizing exoplanets [3,10,26]. This is a hard task since there are hundreds of possible combinations of modes and filters.…”

Section: Introductionmentioning

confidence: 99%

JWST retrieval simulation of super-Earth

Barbier

Izurieta

Vélez

et al. 2022

J. Phys.: Conf. Ser.

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The James Webb Telescope (JWST), launched at the end of 2021, will permit the study of exoplanets’ atmospheres with an accuracy never obtained before. One of the most keenly anticipated science themes with JSWT data is the study of super-Earth type planets. There exist many questions about their interior and atmospheric composition as well as their evolution and possible migrations. In this work, we simulated transmission spectra of super-Earth type systems with the petitRADTRANS code and emission spectra of a M-type star with PySynphot. The primary transit observation is simulated with the MIRISim simulator working in the MIRI LRS-Slitless mode. We then obtained the transmission spectra of the planet using a code that we developed ourselves. Finally, we carried out the retrieval: first, in order to check the retrieval tool included in the petitRADTRANS code, we treated the original transmission spectrum. Second, the code is used with the spectrum obtained from the telescope simulator. The results found encourage us to compare them to results found when using other tools, with the hope of gaining precision in those results, in addition to working in a wider range of wavelengths.

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“…The NIRCam detectors will be operated in their normal MULTIACCUM modes [21][22][23] during spectroscopic observations. High-precision time-series grism observations of bright objects (e.g., host stars of transiting planets) will likely require the use of a limited detector region to prevent saturation.…”

Section: Spectroscopic Operationsmentioning

confidence: 99%

λ = 2.4 to 5 μ m spectroscopy with the James Webb Space Telescope NIRCam instrument

Greene

Kelly

Stansberry

et al. 2017

J. Astron. Telesc. Instrum. Syst

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Abstract. The James Webb Space Telescope near-infrared camera (JWST NIRCam) has two 2. 0 2 × 2. 0 2 fields of view that can be observed with either imaging or spectroscopic modes. Either of two R ∼ 1500 grisms with orthogonal dispersion directions can be used for slitless spectroscopy over λ ¼ 2.4 to 5.0 μm in each module, and shorter wavelength observations of the same fields can be obtained simultaneously. We describe the design drivers and parameters of the grisms and present the latest predicted spectroscopic sensitivities, saturation limits, resolving powers, and wavelength coverage values. Simultaneous short wavelength (0.6 to 2.3 μm) imaging observations of the 2.4 to 5.0 μm spectroscopic field can be performed in one of several different filter bands, either infocus or defocused via weak lenses internal to the NIRCam. The grisms are available for singleobject time-series spectroscopy and wide-field multiobject slitless spectroscopy modes in the first cycle of JWST observations. We present and discuss operational considerations including subarray sizes and data volume limits. Potential scientific uses of the grisms are illustrated with simulated observations of deep extragalactic fields, dark clouds, and transiting exoplanets. Information needed to plan observations using these spectroscopic modes is also provided.

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Observing Exoplanets with the James Webb Space Telescope

Cited by 3 publications

References 75 publications

Exoplanetary Atmospheres: Key Insights, Challenges, and Prospects

Exoplanetary Atmospheres: Key Insights, Challenges, and Prospects

JWST retrieval simulation of super-Earth

λ = 2.4 to 5 μ m spectroscopy with the James Webb Space Telescope NIRCam instrument

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