Re: NCTS Astrophysics Student Lunch Seminars [July to December 2025]

Dear colleagues,

We will have an NCTS student seminar next Thursday, July 24. The student, from TKU, is supervised by Hsi-An Pan, an ASIAA alumnus. The talk will take place in Cosmology Hall at 12:00 p.m. on the 4th floor.

Details below. You can also sign up for lunch boxes here:

https://forms.gle/41juY8MZyL2eWX2i7

Cheers, Min-Kai

Tracing Gas and Star formation in Galaxy Mergers with ALMA and MaNGAPon-Yin Wang (TKU)

Galaxy interactions play a crucial role in the evolution of galaxies in the local universe, often triggering enhanced star formation. Simulations consistently suggest that such interactions significantly reshape the distribution of molecular gas within galactic disks, thereby altering the spatial distribution of star formation. In this study, we aim to observationally investigate the distribution of gas and star formation across different merger stages and assess the extent to which these observations align with simulation predictions. Here we analyze a sample of 15 galaxies—including galaxy pairs and post-mergers—with stellar masses log(M*) ≥ 10 [M⊙] and redshifts in the range 0.02 < z < 0.1, using data from ALMA and SDSS-MaNGA. We also construct radial profiles of gas fraction, star formation rate(SFR), and star formation efficiency(SFE), extending from the galactic center to 1.5 effective radii(Re). Our results indicate that the gas fraction is the primary driver of elevated SFR in close pair systems. Nevertheless, all merger stages exhibit an inconsistent relationship between SFR and gas mass, suggesting the presence of a common regulatory mechanism governing star formation during galaxy interactions.

On Mon, Jul 14, 2025 at 11:41 AM Min-Kai Lin mklin@asiaa.sinica.edu.tw wrote:

Dear colleagues,

The NCTS Astrophysics group is resuming our monthly student seminar series. These provide opportunities for our domestic students to share their work and practice giving live talks. The schedule for the rest of the year is appended below. Seminars begin at 12pm in the 4F lecture room in the Cosmology Hall on the NTU campus. Talks are open to all.

Sign up links for lunch boxes will become available from the NCTS seminar list a week before the talks:

https://phys.ncts.ntu.edu.tw/en/act/Seminars/seminars_TG2

Cheers, Min-Kai

Date Speaker 1 Affiliation Supervisor Speaker 2 Affiliation Supervisor 2025/7/24 Pon-Yin Wang TKU Hsi-An Pan 2025/8/22 Tsung-Han Chuang NTNU Yueh-Ning Lee 2025/9/26 Chiung-Yin Chang NTHU Hsiang-Yi Karen Yang Huan-Ping Chao NCKU Kwan-Lok Li 2025/10/31 Yi-Yang Lee NTHU Hsiang-Yi Karen Yang Prangsutip Cherdwongsung NTHU Ing-Guey Jiang 2025/11/28 Yu-Xuan Nancy Lin NYCU Shih-Ping Lai Tz-En Gau NTU Chia-Yu Hu 2025/12/26 Szu-Ting Chen NTHU Shin-Ping Lai Afif Ismail NTNU Hung-Yi Pu