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Galaxies evolve via internal and external processes. Kinematically misaligned galaxies, primarily stemming from external gas acquisition, are ideal probes of this process. From final data release of MaNGA, we selected ~700 misaligned galaxies (gas-gas, gas-star, star-star) and systematically investigated their origin and physical properties. Key findings: (1) Misaligned gas, often perpendicular to filaments, originates from the large-scale structure (LSS); (2) Star-forming/green-valley misaligned galaxies exhibit younger central and older outer stellar populations than matched controls; (3) Their AGN fraction is >2× higher; (4) Galactic-scale outflows are ubiquitous in misaligned galaxies. We propose a unifying scenario: external misaligned gas accretion triggers inflow, driving central star formation and black hole activity, and subsequently inducing global outflows.

BIO

Yanmei Chen (陈燕梅) received her Ph.D. degree from the Institute of high energy physics, CAS, in 2009. Then Yanmei moved to MPA, Garching and University of Wisconsin Madison for Post-Doc researches. She joined Nanjing University in 2012 as a faculty and was awarded the National Science Fund for Excellent Young Scholars in 2019. Yanmei is mainly engaged in her research of active galactic nucleus (AGN) and galaxy evolution, topics involve gas accretion into galaxies, star formation, and AGN activity, as well as their feedback effect.

Host: Cheng Li