| Name: Avinanda Chakraborty |
| Affiliation: Indian Institute of Astrophysics |
| Conference ID: ASI2026_223 |
| Title: Unveiling feedback in a clumpy star-forming galaxy at cosmic noon: ERIS observations of ZC406690 |
| Abstract Type: Oral |
| Abstract Category: Galaxies and Cosmology |
| Author(s) and Co-Author(s) with Affiliation: Avinanda Chakraborty(Indian Institute of Astrophysics), Francesco Belfiore(ESO-Garching (Germany), INAF-Arcetri Astrophysical Observatory) |
| Abstract: Cosmic Noon (z ~ 2) marked a period of intense star formation for most galaxies. To understand how the baryon cycle drives disc assembly and bulge growth, I use the ERIS integral field spectrograph (IFS) to obtain high spatial and spectral resolution maps of key optical lines (H-alpha, H-beta, [O III] 5007, [N II]) in massive star-forming galaxies. Here I'll present results for ZC406690 (z = 2.19), stellar mass ~10^10.6 solar masses), a clumpy, ring-like galaxy. The four brightest clumps show asymmetric [O III] and H-alpha profiles, indicating strong stellar feedback and intense star formation. However, the emission-line ratios reveal highly ionized, dusty regions, with two brightest clumps exhibiting the highest excitation and extinction. We checked outflow measurements of the individual clumps show moderate to extreme winds (480–1000 km/s), with electron densities and ionization parameters varying across clumps. Our results highlight strong, spatially variable stellar feedback shaping the physical conditions of star-forming clumps at Cosmic Noon. |
