Jacob Bean (University of Chicago) On behalf of the transi/ng - - PowerPoint PPT Presentation

The Transi*ng Exoplanet Community Early Release Science Program for JWST

Jacob Bean (University of Chicago) On behalf of the transi/ng exoplanet ERS team

Thanks to the many hundreds of people who con*nue to work towards JWST mission success!

JWST offers myriad instrument setup choices

Stevenson+ 2016

Complica*ons:

• entrance apertures
• pixel sampling
• bright limits
• spectral contamina/on
• throughput varia/ons
• spa/al profile varia/ons
• detector gaps
• read paAerns
• data limits
• observatory opera/ons

JWST data reduc*on will be complex

NIRISS + SOSS lab data

• rder 1
• rder 2
• rder 3

Wavelength (μm) Light curve modeling spectral extrac/on

Figure adapted from Knutson+ 2012

Robust correc*on of instrument systema*cs is essen*al

1 x 10-3 Spitzer/IRAC 4.5μm HD 189733b thermal phase curve

Figure adapted from Knutson+ 2012

1 x 10-3 Spitzer/IRAC 4.5μm HD 189733b thermal phase curve 2 x 10-2

Robust correc*on of instrument systema*cs is essen*al

Goals of the transi*ng exoplanet community ERS program

• Determine the spectrophotometric /me-series performance of the key

instrument modes on /mescales relevant to transits for a representa/ve range of target star brightnesses.

• Jump-start the process of developing remedia/on strategies for

instrument-specific systema/c noise.

• Provide the community a comprehensive suite of transi/ng exoplanet

data to fully demonstrate JWST’s scien/fic capabili/es in this area.

For more informa/on see: Program 1377 informa/on at STScI website Bean+ 2018, PASP in revision, arXiv:1803.04985 hAps://ers-transit.github.io

Community

Currently 112 team members: 58% observers, 33% theorists 54% US, 46% EU + Canada 23% women overall 44% women in leadership roles

We welcome new team members!

community guidance

ERS Program 1377: 80 hours of JWST *me!

six observa2ons, three planets, four instruments, three transi2ng planet geometries

• 1. Panchroma*c transmission spectrum of a hot Jupiter

(NIRISS + NIRSpec + NIRCam: 0.6 – 5.0 μm, ~40 hrs)

What is the chemical composi/on of a hot Jupiter? WASP-79b: M=0.9 Mjup, R=2 Rjup, T=1750 K, J=9.3

HST data from Showalter+ in prep see poster #45

• 2. Mid-infrared phase curve of a short-period hot Jupiter

(MIRI LRS: 5 – 12 μm, ~30 hrs)

WASP-43b: M=2 Mjup, R=1 Rjup, T=1450 K, J=10.0 How does energy transport and 3D chemistry operate under extreme irradia/on? dayside

For more see Venot+ in prep

• 3. Thermal emission of a hot Jupiter orbi*ng a bright star

(NIRISS: 0.8 – 2.7 μm, ~10 hrs)

WASP-18b: M=10 Mjup, R=1.2 Rjup, T=2400 K, J=8.4 What is the chemistry, thermal structure, and energy budget of an ultra-hot Jupiter?

Target Selec*on

Start of JWST science assuming a March 30 launch primary targets

These workshops will be open to the en*re community, regardless of Co-I/Collaborator status on the proposal.

Slide courtesy Zach Berta-Thompson

Slide courtesy Zach Berta-Thompson

Timeline

Timeline

TESS 2 year mission complete

Figure from Rob Zellem See also: Kempton+ 2018 (arXiv:1805.03671)

ERS Program 1377 Transi/ng Planets Time: 80 hrs ERS Program 1386 Direct Imaging Time: 52 hrs

(see Hinkley talk tomorrow morning)

ERS Program 1377 Transi/ng Planets Time: 80 hrs ERS Program 1386 Direct Imaging Time: 52 hrs 27% of the allocated ERS /me went to exoplanets!