James Webb Space Telescope Feed Post

Date: 6/11/2024

Arxiv: Detection of New Galaxy Candidates at z\ > 11 in the JADES Field Using JWST NIRCam Published: 6/8/2024 3:18:13 AM Updated: 6/8/2024 3:18:13 AM

Paper abstract: We report the detection of seven new galaxy candidates with redshift z >11 within the JWST Advanced Deep Extragalactic Survey (JADES) GOODS-S andGOODS-N fields. These new candidates are detected through meticulous analysisof NIRCam photometry in eight filters spanning a wavelength range of 0.8-5.0\mum. Photometric redshifts of these galaxy candidates are independentlymeasured utilizing spectral energy distribution (SED) fitting techniques using\texttt{EAZY} and \texttt{BAGPIPES} codes, followed by visual scrutiny. Two ofthese galaxy candidates are located in GOODS-S field, while the remaining fivegalaxies are located in GOODS-N field. Our analysis reveals that the stellarmasses of these galaxies typically range from log M_{\ast}/M_{\odot} =7.75--8.75. Futhermore, these galaxies are typically young with theirmass-weighted ages spanning from 80 to 240 Myr. Their specific star formationrates (sSFR), quantified as \log (\text{sSFR}/\text{Gyr}), are measured tovary between ~ 0.95 to 1.46. These new galaxy candidates offer a robustsample for probing the physical properties of galaxies within the first fewhundred Myr of the history of the Universe. We also analyze the relationshipbetween star formation rate (SFR) and stellar mass (M_\ast) within oursample. Using linear regression, our analysis yields a slope of 0.71 \pm0.12, which we then compare with results from previous studies. Continuedinvestigation through spectroscopic analysis using JWST/NIRSpec is needed tospectroscopically confirm these high-redshift galaxy candidates and investigatefurther into their physical properties. We plan to follow up on thesecandidates with future NIRSpec observations.