Login

The 3rd Shanghai Assembly on Cosmology and Structure Formation

Nov 16 – 21, 2025
Tsung-Dao Lee Institute
Asia/Shanghai timezone

Contact LOC

Session

Galaxies 2

Nov 18, 2025, 9:00 AM
Tianwen Hall

Tianwen Hall

Conveners

Galaxies 2

  • Alessandro Sonnenfeld

Presentation materials

There are no materials yet.

  1. 71. A 13-Gyr view of galaxy growth and baryon cycle with JWST 3D Spectroscopy
    Xin Wang (Univ of Chinese Academy of Sciences)
    11/18/25, 9:00 AM
    Galaxy Formation and Evolution
    Talk

    Using state-of-the-art reduction methods, we analyze the new JWST data acquired by the NIRISS/NIRCam wide-field slitless spectroscopy (WFSS) and NIRSpec in the multi-object slit-stepping spectroscopy mode. These complementary spectroscopic data sets obtained from multiple instruments open up key window on unbiased investigation of star formation, feedback, and ISM properties in and beyond the...

    Go to contribution page
  2. 8. From Feedback-Free Starbursts at Cosmic Dawn to Quenching at Cosmic Morning
    Zhaozhou Li (Nanjing University)
    11/18/25, 9:30 AM
    Galaxy Formation and Evolution
    Talk

    JWST observations reveal a surprising excess of luminous galaxies at z≳10, suggesting a high star formation efficiency. This contrasts with the low star formation efficiency suppressed by feedbacks at later times, indicating a potential paradigm shift. We propose that the high densities and low metallicities at high z guarantee high star-formation efficiency through feedback-free starbursts...

    Go to contribution page
  3. 2. Rethinking Galaxy Evolution: A Multidisciplinary Perspective via a Simple Growth Model
    Prof. Antonios Katsianis (Sun Yat-sen University)
    11/18/25, 9:50 AM
    Galaxy Formation and Evolution
    Talk

    In this talk I will briefly discuss the present state of the field of galaxy evolution and share the results of opinion polls conducted at the 2021 European Astronomical Society meeting and the 2025 International Astronomical Union meeting. These polls illustrate the significant challenges both observers and theorists/simulators are currently facing. In sight of these apparent limitations I...

    Go to contribution page
  4. 43. Interaction-induced Star Formation in Galaxies: Centrally Concentrated HI Distribution and Dependence on Morphology of Companions
    Yanhan Guo (Tsinghua University)
    11/18/25, 10:05 AM
    Galaxy Formation and Evolution
    Talk

    It is well known that galaxy interactions will trigger star formation, due to the tidal effect. With the observations from ALFALFA and SDSS samples, we show that galaxies with close companions tend to exihibit single-peaked integrated HI profiles, indicating that galaxy interactions lead to more centrally concentrated HI distribution, and trigger star formation.
    Besides, it was found that...

    Go to contribution page
  5. 61. Collisional Formation of BDDGs from Progenitors with Weakened Gravitational Binding
    Yi-Ying Wang (Purple Mountain Observatory)
    11/18/25, 10:20 AM
    Galaxy Formation and Evolution
    Talk

    Baryon-dominated dwarf galaxies (BDDGs) offer a sensitive probe of energy injection in low-mass halos. Using hydrodynamical simulations of high-velocity collisions between gas-rich ultra-diffuse galaxies, we study how progenitor structure affects BDDG formation. We model systems with varying central density profiles, corresponding to different baryonic binding energies, and introduce a gas...

    Go to contribution page
Building timetable...