9 papers
Point-like and Narrow-lined: A Potentially New Population of Objects Discovered by JWST
Haojing Yan, Bangzheng Sun, Riley Shive
We report a potentially new population of objects revealed by the data from the James Webb Space Telescope, which are characterized by their point-like morphology and narrow permit…
JWST's PEARLS: A clumpy ring galaxy at
David Vizgan, Ming-Yang Zhuang, Ian Smail +22
Ring galaxies are an uncommon class of galaxies whose morphology is closely related to dynamical processes that govern galaxy evolution. Some ring galaxies, known as "collisional r…
A Mysteriously Tight H-[O III] Correlation and Non-Case B Balmer Decrements Revealed by the Spectra from the James Webb Space Telescope NIRSpec Instrument
Bangzheng Sun, Haojing Yan
We report an extremely tight, linear relation between and [O~III] line fluxes in logarithm, discovered using a large sample of low and mid-resolution spectra (totaling…
New Insight from the James Webb Space Telescope on Variable Active Galactic Nuclei
Bangzheng Sun, Haojing Yan, Wei Leong Tee +1
Variability detected in galaxies is usually attributed to their active galactic nuclei (AGNs). While all AGNs are intrinsically variable, the AGN unification model predicts that ty…
PEARLS: 21 Transients Found in the Three-Epoch NIRCam Observations in the Continuous Viewing Zone of the James Webb Space Telescope
Haojing Yan, Bangzheng Sun, Zhiyuan Ma +39
We present 21 transients from our three-epoch, four-band NIRCam observations covering 14.16 arcmin^2 in the Spitzer IRAC Dark Field (IDF), taken by the JWST Prime Extragalactic Are…
JWST's PEARLS: A Candidate Massive Binary Star System in a Lensed Galaxy at Redshift 0.94
Hayley Williams, Patrick L. Kelly, Emmanouil Zapartas +18
Massive stars at cosmological distances can be individually detected during transient microlensing events, when gravitational lensing magnifications may exceed ~1000. Nine such sou…