NGST NIRCam Scientific Program and Design Concept

Rieke, M. J.; Baum, Stefi A.; Beichman, Charles; Crampton, D.; Doyon, René; Eisenstein, Daniel; Greene, Thomas P.; Hodapp, Klaus W.; Horner, Scott D.; Johnstone, Doug; Lesyna, L.; Lilly, Simon; Meyer, Michael; Martín, P. G.; McCarthy, Donald W.; Rieke, G. H.; Roellig, Thomas L.; Stauffer, J. R.; Trauger, John T.; Young, Erick T.

doi:10.1117/12.489103

Cited by 28 publications

(15 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to get a handle on the observability of the dust outflows of our XEUV wind model, we produced synthetic images for inclinations of i ∈ {0; 30; 60; 75; 90} • , using RadMC-3D (Dullemond et al 2012) 11 . These were further converted into simulated instrument responses for the James Webb Space Telescope (JWST) Near Infrared Camera (NIRCam) scattered-light imaging (Rieke et al 2003(Rieke et al , 2005 using Mirage (Hilbert et al 2019) 12 , and the JWST pipeline 13 , and polarised-light imaging with the Spectro-Polarimetric High-contrast Exoplanet REsearch (SPHERE) + InfraRed Dual-band Imager and Spectrograph (IRDIS) instrument of the Very Large Telescope (VLT) (Beuzit et al 2019) 14 .…”

Section: Synthetic Observationsmentioning

confidence: 99%

Dust entrainment in photoevaporative winds: Densities and imaging

Franz

Ercolano

Casassus

et al. 2022

A&A

View full text Add to dashboard Cite

Context. X-ray- and extreme-ultraviolet- (together: XEUV-) driven photoevaporative winds acting on protoplanetary disks around young T-Tauri stars may crucially impact disk evolution, affecting both gas and dust distributions. Aims. We constrain the dust densities in a typical XEUV-driven outflow, and determine whether these winds can be observed at μm-wavelengths. Methods. We used dust trajectories modelled atop a 2D hydrodynamical gas model of a protoplanetary disk irradiated by a central T-Tauri star. With these and two different prescriptions for the dust distribution in the underlying disk, we constructed wind density maps for individual grain sizes. We used the dust density distributions obtained to synthesise observations in scattered and polarised light. Results. For an XEUV-driven outflow around a M* = 0.7 M⊙ T-Tauri star with LX = 2 × 1030 erg s−1, we find a dust mass-loss rate Ṁdust ≲ 4.1 × 10−11 M⊙ yr−1 for an optimistic estimate of dust densities in the wind (compared to Ṁgas ≈ 3.7 × 10−8 M⊙ yr−1). The synthesised scattered-light images suggest a distinct chimney structure emerging at intensities I∕Imax < 10−4.5 (10−3.5) at λobs = 1.6 (0.4) μm, while the features in the polarised-light images are even fainter. Observations synthesised from our model do not exhibit clear features for SPHERE IRDIS, but show a faint wind signature for JWST NIRCam under optimal conditions. Conclusions. Unambiguous detections of photoevaporative XEUV winds launched from primordial disks are at least challenging with current instrumentation; this provides a possible explanation as to why disk winds are not routinely detected in scattered or polarised light. Our calculations show that disk scale heights retrieved from scattered-light observations should be only marginally affected by the presence of an XEUV wind.

show abstract

Section: Synthetic Observationsmentioning

confidence: 99%

Dust entrainment in photoevaporative winds: Densities and imaging

Franz

Ercolano

Casassus

et al. 2022

A&A

View full text Add to dashboard Cite

show abstract

“…Among these programs, the Cosmic Evolution Early Release Science Survey (CEERS; ERS 1345, PI: S Finkelstein) is obtaining imaging and spectroscopy of the Extended Groth Strip (EGS) Hubble Space Telescope (HST) legacy field with three JWST instruments and five coordinated parallel observing modes. The complete program involves imaging with the Near Infrared Camera (NIRCam; Rieke et al 2003Rieke et al , 2005Beichman et al 2012;Rieke et al 2022) short-wavelength (SW) and longwavelength (LW) channels in 10 pointings, observed as coordinated parallels to primary observations with the Near Infrared Spectrograph (NIRSpec; Jakobsen et al 2022) and the Mid-Infrared Instrument (MIRI; Rieke et al 2015;Wright et al 2015). Four of the 10 pointings will be additionally covered by NIRCam wide-field slitless spectroscopy (WFSS) with MIRI imaging obtained in parallel.…”

Section: Introductionmentioning

confidence: 99%

CEERS Epoch 1 NIRCam Imaging: Reduction Methods and Simulations Enabling Early JWST Science Results

Bagley

Finkelstein

Koekemoer

et al. 2023

ApJL

129

View full text Add to dashboard Cite

We present the data release and data reduction process for the Epoch 1 NIRCam observations for the Cosmic Evolution Early Release Science Survey (CEERS). These data consist of NIRCam imaging in six broadband filters (F115W, F150W, F200W, F277W, F356W and F444W) and one medium-band filter (F410M) over four pointings, obtained in parallel with primary CEERS MIRI observations. We reduced the NIRCam imaging with the JWST Calibration Pipeline, with custom modifications and reduction steps designed to address additional features and challenges with the data. Here we provide a detailed description of each step in our reduction and a discussion of future expected improvements. Our reduction process includes corrections for known prelaunch issues such as 1/f noise, as well as in-flight issues including snowballs, wisps, and astrometric alignment. Many of our custom reduction processes were first developed with prelaunch simulated NIRCam imaging over the full 10 CEERS NIRCam pointings. We present a description of the creation and reduction of this simulated data set in the Appendix. We provide mosaics of the real images in a public release, as well as our reduction scripts with detailed explanations to allow users to reproduce our final data products. These represent one of the first official public data sets released from the Directors Discretionary Early Release Science (DD-ERS) program.

show abstract

“…The Near Infrared Camera (NIRCam, Rieke et al 2003Rieke et al , 2005 of the James Webb Space Telescope (JWST) will allow for stateof-the-art scattered-light imaging in the (sub-)µm wavelength range. In Paper II, we have seen that smaller wavelengths should be most favourable for the detection of a wind signature; so we are mainly interested in the F070W filter (λ obs = 0.7 µm).…”

Section: Scattered Lightmentioning

confidence: 99%

Dust entrainment in photoevaporative winds: Synthetic observations of transition disks

Franz

Picogna

Ercolano

et al. 2022

A&A

View full text Add to dashboard Cite

Context. X-ray- and extreme-ultraviolet- (XEUV-) driven photoevaporative winds acting on protoplanetary disks around young T Tauri stars may strongly impact disk evolution, affecting both gas and dust distributions. Small dust grains in the disk are entrained in the outflow and may produce a detectable signal. In this work, we investigate the possibility of detecting dusty outflows from transition disks with an inner cavity. Aims. We compute dust densities for the wind regions of XEUV-irradiated transition disks and determine whether they can be observed at wavelengths 0.7 ≲ λobs [μm] ≲ 1.8 with current instrumentation. Methods. We simulated dust trajectories on top of 2D hydrodynamical gas models of two transition disks with inner holes of 20 and 30 AU, irradiated by both X-ray and EUV spectra from a central T Tauri star. The trajectories and two different settling prescriptions for the dust distribution in the underlying disk were used to calculate wind density maps for individual grain sizes. Finally, the resulting dust densities were converted to synthetic observations in scattered and polarised light. Results. For an XEUV-driven outflow around a M* = 0.7 M⊙ T Tauri star with LX = 2 × 1030 erg s-1, we find dust mass-loss rates Ṁdust ≲ 2.0 × 10−3 Ṁgas, and if we invoke vertical settling, the outflow is quite collimated. The synthesised images exhibit a distinct chimney-like structure. The relative intensity of the chimneys is low, but their detection may still be feasible with current instrumentation under optimal conditions. Conclusions. Our results motivate observational campaigns aimed at the detection of dusty photoevaporative winds in transition disks using JWST NIRCam and SPHERE IRDIS.

show abstract

NGST NIRCam Scientific Program and Design Concept

Cited by 28 publications

References 8 publications

Dust entrainment in photoevaporative winds: Densities and imaging

Dust entrainment in photoevaporative winds: Densities and imaging

CEERS Epoch 1 NIRCam Imaging: Reduction Methods and Simulations Enabling Early JWST Science Results

Dust entrainment in photoevaporative winds: Synthetic observations of transition disks

Contact Info

Product

Resources

About