[Astro] [CAPT] *UNUSUAL TIMES PLEASE READ* Astro seminar Wed 11th Jun 14:45 C4 -- Seoyoung Lyla Jung (Oxford)

[Luke Conaboy]

Hi all,

this week our seminar is given by Seoyoung Lyla Jung (Oxford), details below. The seminar will be in C4. Note the unusual timings, to allow people to attend the SciOUT talk at 16:00 in B1.

Post-seminar refreshments will be wine and cheese, at the usual time (~17:00) in CAPT.

Timings for this week:

* lunch at Lakeside, leaving CAPT ~12:00 (subsidised for a limited number of students -- let me know before the end of the day tomorrow)
* meet the speaker for postgrads at 14:00, finishing at 14:30
* seminar at 14:45 in C5/C4
* post-seminar wine and cheese at 17:00 in CAPT

This seminar will be conducted in person only.

Best,
Jesse and Luke

==

The alignment of galaxies and AGN jets in the cosmic web environment

Active galactic nuclei (AGN) play a crucial role in the evolution of massive galaxies, and their fueling and feedback efficiency depend on the environment. In this talk, I will present a study of the orientations of AGN jets and their optical counterpart in relation to the cosmic web environment. Using LOFAR Two-metre Sky Survey (LoTSS), DESI Legacy Imaging Surveys, and the SDSS cosmic filament catalogue, we find that galaxy optical major axes tend to align with cosmic filaments, suggesting the growth of galaxies through mergers along filaments. On the other hand, AGN jets, typically perpendicular to the host galaxy’s major axis, show more randomized orientations in cosmic filament environments. This supports a scenario where black holes in filaments experience chaotic accretion as a result of numerous galaxy mergers. I will discuss the implications of these results in terms of the large-scale alignment of radio jets, intrinsic alignment of galaxies, and anisotropic quenching of satellite galaxies. Our results highlight the role of cosmic filaments in shaping AGN feedback and galaxy evolution.
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