3 papers
astro-ph.GA2026
Gaia GraL X.: The GraL catalogue of gravitationally lensed quasars Matched with \textit{Gaia} data, redshifts, and time delays
C. Ducourant, R. Teixeira, P. H. Vale-Cunha +25
Determining the Hubble constant tension requires alternative strategies, and multiply imaged quasars, with their intermediate redshifts, can potentially be used in this regard. We…
astro-ph.GA2025
Characterizing the star cluster populations in Stephan's Quintet using HST and JWST observations
P. Aromal, S. C. Gallagher, K. Fedotov +14
Stephan's Quintet (SQ) is a local compact galaxy group system that exhibits significant star formation activity. A history of tidal interactions between its four member galaxies an…
astro-ph.GA2025
SQ-A: A Collision Triggered Starburst in Intra-Group Medium of Stephan's Quintet
C. K. Xu, C. Cheng, M. S. Yun +12
We present new observational evidence supporting the hypothesis that SQ-A, a starburst in the intra-group medium (IGrM) of Stephan's Quintet (SQ), is triggered by a high-speed coll…