The JWST tunable filter imager (TFI)

Doyon, René; Hutchings, J. B.; Rowlands, Neil; Evans, Clinton; Greenberg, E.; Haley, C. S.; Scott, Alan; Touahri, D.; Beaulieu, Marie; Lafrenière, David; Abraham, Roberto; Barton, Elizabeth J.; Chayer, P.; Ferrarese, Laura; Fullerton, A. W.; Jayawardhana, Ray; Johnstone, Doug; Martel, A. R.; Meyer, A. W.; Pipher, J. L.; Saad, Karl; Sawicki, Marcin; Sivaramakrishnan, Anand; Volk, Kevin

doi:10.1117/12.857382

Cited by 19 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Extending the models used to derive the 1.4 μm feature size in the HST WFC3 G141 data, we estimate the amplitude of features seen in observations with future instruments by studying the minimum and maximum transit depth across their spectral coverage. For JWST NIRISS GR700XD (0.6-2.8 μm; Doyon et al 2012) and JWST NIRSpec G395H (2.8-5.1 μm; Birkmann et al 2016) we predict average feature sizes of 2.52 and 1.65 scale heights, respectively. Combining both instruments, observing with the JWST NIRSpec PRISM (0.6-5.3 μm), or with Twinkle (0.5-4.5 μm; gives an amplitude of 2.57 scale heights.…”

Section: 2mentioning

confidence: 84%

Exploring the Ability of Hubble Space Telescope WFC3 G141 to Uncover Trends in Populations of Exoplanet Atmospheres through a Homogeneous Transmission Survey of 70 Gaseous Planets

Edwards,

Changeat,

Tsiaras

et al. 2023

ApJS

View full text Add to dashboard Cite

We present analysis of the atmospheres of 70 gaseous extrasolar planets via transit spectroscopy with Hubble’s Wide Field Camera 3 (WFC3). For over half of these, we statistically detect spectral modulation that our retrievals attribute to molecular species. Among these, we use Bayesian hierarchical modeling to search for chemical trends with bulk parameters. We use the extracted water abundance to infer the atmospheric metallicity and compare it to the planet’s mass. We also run chemical equilibrium retrievals, fitting for the atmospheric metallicity directly. However, although previous studies have found evidence of a mass–metallicity trend, we find no such relation within our data. For the hotter planets within our sample, we find evidence for thermal dissociation of dihydrogen and water via the H− opacity. We suggest that the general lack of trends seen across this population study could be due to (i) the insufficient spectral coverage offered by the Hubble Space Telescope’s WFC3 G141 band, (ii) the lack of a simple trend across the whole population, (iii) the essentially random nature of the target selection for this study, or (iv) a combination of all the above. We set out how we can learn from this vast data set going forward in an attempt to ensure comparative planetology can be undertaken in the future with facilities such as the JWST, Twinkle, and Ariel. We conclude that a wider simultaneous spectral coverage is required as well as a more structured approach to target selection.

show abstract

Section: 2mentioning

confidence: 84%

Exploring the Ability of Hubble Space Telescope WFC3 G141 to Uncover Trends in Populations of Exoplanet Atmospheres through a Homogeneous Transmission Survey of 70 Gaseous Planets

Edwards,

Changeat,

Tsiaras

et al. 2023

ApJS

View full text Add to dashboard Cite

show abstract

“…All UNCOVER data products are publicly available on the UNCOVER website. 31 We note that the GLASS-JWST program also obtained Near-Infrared Imager and Slitless Spectrograph (NIRISS; Doyon et al 2012, R. Doyon et al 2023, in preparation) spectroscopy of the cluster core covering wavelengths λ ∼ 1.1-2.2 μm. The UNCOVER program also includes spectroscopic follow-up observations with JWST's Near Infrared Spectrograph (NIRSpec; Ferruit et al 2022;Jakobsen et al 2022;Böker et al 2023), which are scheduled for 2023 July and would allow deeper spectroscopic measurements and to longer wavelengths.…”

Section: Datamentioning

confidence: 99%

JWST UNCOVER: Extremely Red and Compact Object at z _phot ≃ 7.6 Triply Imaged by A2744

Furtak¹,

Zitrin²,

Plat³

et al. 2023

ApJ

View full text Add to dashboard Cite

Recent JWST/NIRCam imaging taken for the ultra-deep UNCOVER program reveals a very red dropout object at z phot ≃ 7.6, triply imaged by the galaxy cluster A2744 (z d = 0.308). All three images are very compact, i.e., unresolved, with a delensed size upper limit of r e ≲ 35 pc. The images have apparent magnitudes of m F444W ∼ 25−26 AB, and the magnification-corrected absolute UV magnitude of the source is M UV,1450 = −16.81 ± 0.09. From the sum of observed fluxes and from a spectral energy distribution (SED) analysis, we obtain estimates of the bolometric luminosities of the source of L bol ≳ 1043 erg s−1 and L bol ∼ 1044–1046 erg s−1, respectively. Based on its compact, point-like appearance, its position in color–color space, and the SED analysis, we tentatively conclude that this object is a UV-faint dust-obscured quasar-like object, i.e., an active galactic nucleus at high redshift. We also discuss other alternative origins for the object’s emission features, including a massive star cluster, Population III, supermassive, or dark stars, or a direct-collapse black hole. Although populations of red galaxies at similar photometric redshifts have been detected with JWST, this object is unique in that its high-redshift nature is corroborated geometrically by lensing, that it is unresolved despite being magnified—and thus intrinsically even more compact—and that it occupies notably distinct regions in both size–luminosity and color–color space. Planned UNCOVER JWST/NIRSpec observations, scheduled in Cycle 1, will enable a more detailed analysis of this object.

show abstract

“…Transiting exoplanet studies can utilize all four JWST scientific instruments. These include the Near-InfraRed Camera (NIRCam, PI: Marcia Rieke, Beichman et al 2012), the Near-InfraRed Spectrograph (NIRSpec, PI: Peter Jakobsen, Ferruit et al 2012), the Near Infrared Imager and Slitless Spectrograph (NIRISS, PI: René Doyon, Doyon et al 2012), and the Mid-Infrared Instrument (MIRI, PIs: George Rieke & Gillian Wright, Kendrew et al 2015;Rieke et al 2015;Wells et al 2015). Here, we provide a brief description of each instrument as they relate to transiting exoplanets, discuss how they can be utilized in an exoplanet ERS program, and justify why such programs are necessary.…”

Section: Jwst Instrument Modes and Systematicsmentioning

confidence: 99%

Transiting Exoplanet Studies and Community Targets forJWST's Early Release Science Program

Stevenson¹,

Lewis²,

Bean³

et al. 2016

PASP

115

View full text Add to dashboard Cite

The James Webb Space Telescope (JWST) will likely revolutionize transiting exoplanet atmospheric science due to a combination of its capability for continuous, long duration observations and its larger collecting area, spectral coverage, and spectral resolution compared to existing space-based facilities. However, it is unclear precisely how well JWST will perform and which of its myriad instruments and observing modes will be best suited for transiting exoplanet studies. In this article, we describe a prefatory JWST Early Release Science (ERS) Cycle 1 program that focuses on testing specific observing modes to quickly give the community the data and experience it needs to plan more efficient and successful transiting exoplanet characterization programs in later cycles. We propose a multi-pronged approach wherein one aspect of the program focuses on observing transits of a single target with all of the recommended observing modes to identify and understand potential systematics, compare transmission spectra at overlapping and neighboring wavelength regions, confirm throughputs, and determine overall performances. In our search for transiting exoplanets that are well suited to achieving these goals, we identify 12 objects (dubbed "community targets") that meet our defined criteria. Currently, the most favorable target is WASP-62b because of its large predicted signal size, relatively bright host star, and location in JWST's continuous viewing zone. Since most of the community targets do not have well-characterized atmospheres, we recommend initiating preparatory observing programs to determine the presence of obscuring clouds/hazes within their atmospheres. Measurable spectroscopic features are needed to establish the optimal resolution and wavelength regions for exoplanet characterization. Other initiatives from our proposed ERS program include testing the instrument brightness limits and performing phase-curve observations. The latter are a unique challenge compared to transit observations because of their significantly longer durations. Using only a single mode, we propose to observe a full-orbit phase curve of one of the previously characterized, short-orbital-period planets to evaluate the facility-level aspects of long, uninterrupted time-series observations.

show abstract

The JWST tunable filter imager (TFI)

Cited by 19 publications

References 0 publications

Exploring the Ability of Hubble Space Telescope WFC3 G141 to Uncover Trends in Populations of Exoplanet Atmospheres through a Homogeneous Transmission Survey of 70 Gaseous Planets

Exploring the Ability of Hubble Space Telescope WFC3 G141 to Uncover Trends in Populations of Exoplanet Atmospheres through a Homogeneous Transmission Survey of 70 Gaseous Planets

JWST UNCOVER: Extremely Red and Compact Object at z _phot ≃ 7.6 Triply Imaged by A2744

Transiting Exoplanet Studies and Community Targets forJWST's Early Release Science Program

Contact Info

Product

Resources

About

The JWST tunable filter imager (TFI)

Cited by 19 publications

References 0 publications

Exploring the Ability of Hubble Space Telescope WFC3 G141 to Uncover Trends in Populations of Exoplanet Atmospheres through a Homogeneous Transmission Survey of 70 Gaseous Planets

Exploring the Ability of Hubble Space Telescope WFC3 G141 to Uncover Trends in Populations of Exoplanet Atmospheres through a Homogeneous Transmission Survey of 70 Gaseous Planets

JWST UNCOVER: Extremely Red and Compact Object at z phot ≃ 7.6 Triply Imaged by A2744

Transiting Exoplanet Studies and Community Targets forJWST's Early Release Science Program

Contact Info

Product

Resources

About

JWST UNCOVER: Extremely Red and Compact Object at z _phot ≃ 7.6 Triply Imaged by A2744