James Webb Space Telescope Feed Post

The JADES Origins Field: A New JWST Deep Field in the JADES Second NIRCam Data Release

A small portion of the deep imaging from the JOF, illustrating some of the opportunities of the medium-band data. The background mosaic shows an F444W/F200W/F090W RGB image with three galaxies highlighted. A disk galaxy at redshift z ~ 1 (center) shows star forming regions that glow distinctively in various JADES filter combinations. Emission from Ha and [NII] appear as green in an F200W/F150W/F115W RGB image, and Paa appears as red in an F410M/F356W/F335M RGB image. The redshifts of line-emitting galaxies can be easily identified using the JADES medium bands. At z ~ 6, Hß+[OIII] appear as green in an F356W/F335M/F277W RGB image. At z~ 5, the presence of Hß+[OIII] in F277W, Ha in F356W, and no strong line in F335M will cause a line-emitting galaxy to appear purple in an F277W/F335M/F356W RGB image. Abstract: We summarize the properties and initial data release of the JADES Origins Field (JOF), which will soon be the deepest imaging field yet observed with the James Webb Space Telescope (JWST). This field falls within the GOODS-S region about 8' south-west of the Hubble Ultra Deep Field (HUDF), where it was formed initially in Cycle 1 as a parallel field of HUDF spectroscopic observations within the JWST Advanced Deep Extragalactic Survey (JADES). This imaging will be greatly extended in Cycle 2 program 3215, which will observe the JOF for 5 days in six medium-band filters, seeking robust candidates for z>15 galaxies. This program will also include ultra-deep parallel NIRSpec spectroscopy (up to 104 hours on-source, summing over the dispersion modes) on the HUDF. Cycle 3 observations from program 4540 will add 20 hours of NIRCam slitless spectroscopy to the JOF. With these three campaigns, the JOF will be observed for 380 open-shutter hours with NIRCam using 15 imaging filters and 2 grism bandpasses. Further, parts of the JOF have deep 43 hr MIRI observations in F770W. Taken together, the JOF will soon be one of the most compelling deep fields available with JWST and a powerful window into the early Universe. This paper presents the second data release from JADES, featuring the imaging and catalogs from the year 1 JOF observations.