Finding Obscured Galaxies/Black Holes from the New James Webb Space Telescope Data
Tomo Goto (National Tsing Hua University)
It has been an unanswered question that how many dusty galaxies have been undetected from the state-of-the-art observational surveys. Most faint dusty galaxies have been beyond the reach of the previous space infrared telescopes such as Spitzer (85 cm), and AKARI (65 cm). With the advent of the 6.5m James Webb Space Telescope (JWST), a revolution is about to happen. With 100 times better sensitivity of the 6.5m telescope than AKARI and Spitzer, we now can reveal previously undetected faint infrared sources. Polycyclic aromatic hydrocarbon (PAH) is a valuable tracer of star formation and dust properties in the mid-infrared wavelength. Active galactic nuclei has characteristic emission in the mid-infrared due to the high-temperature of the warm dust. The JWST Cosmic Evolution Early Release Science (CEERS) fields provide us with wavelength coverage from 7.7 to 21 𝜇m using six photometry bands of the mid-infrared instrument (MIRI). Using the JWST multi-band photometry catalogue we identify such galaxies and black holes, previously unseen with any other telescopes.