AMUSE2 - a systematic submillimeter survey around quasars hosting Lyman-alpha nebulae at z=2-4
Chian-Chou (TC) Chen1*, Yu-Jan Wang1,2, Fabrizio Arrigoni Battaia3
1Academia Sinica, Institute of Astronomy and Astrophysics, Taipei, Taiwan
2Department of Physics, National Taiwan University, Taipei, Taiwan
3Institute for Astrophysics, Max Planck Society, Munich, Germany
* Presenter:Chian-Chou (TC) Chen, email:ccchen@asiaa.sinica.edu.tw
Studies on the formation of structures have a profound impact on cosmology and galaxy formation. Investigating protoclusters and their associated members during cosmic noon offers an excellent opportunity to test how massive galaxies assemble their masses and how their formation mechanisms are influenced by the environment. However, research on protoclusters has been hindered by small sample sizes and the use of heterogeneous data sets, which limit our ability to draw definitive conclusions. To address these issues, we have conducted a submillimeter survey around a sample of 20 bright quasars hosting Lyman-alpha nebulae at z=2-4. This survey complements previous studies by providing insights into obscured star formation processes. Our findings provide statistical evidence for the widespread presence of dusty star-forming galaxies (DSFGs) around these quasars. Moreover, these DSFGs appear to align with filamentary structures on a scale of several megaparsecs (Mpc). Additionally, we observed that the alignment of these filamentary structures coincides with the major axis of the Lyman-alpha nebulae, suggesting that the nebulae, which are hundreds of kpc across, trace the central regions of the large-scale structure described by the submillimeter galaxies on Mpc scales. Finally, I will also present results from our ALMA follow-up observations, aimed at confirming the membership of these DSFG candidates, as well as to study the environmental impact on their physical properties.
Keywords: Galaxy formation and evolution, Dusty star-forming galaxies, High-redshift galaxies, Cosmological structure