[Astro] [CAPT] CAPT Weekly Bulletin (w/c 12-05-25)

[Ella Batchelor]

Monday 12th May at 3pm, A113 CAPT – Theoretical Physics Student Seminar
Juhan Raidal

Modelling of cosmic (super)string networks
---

Tuesdays at 11am, CAPT Foyer – Astro Coffee



Tuesday 13th May at 11.30am, A113 CAPT – Astronomy Journal Club



Tuesday 13th May at 1pm, A113 CAPT – Particle Cosmology and Gravity Seminar
David Trestini (Southampton)

Modelling gravitational waves from compact binaries in scalar tensor theories within the post-Newtonian approximation



The post-Newtonian approximation, which assumes that the orbital velocity of a compact binary is small, has been very successful in obtaining analytical waveforms. Here, I will review how to adapt the post-Newtonian framework to the case of a class of massless scalar-tensor theories. I will then present recent results for circular, elliptic and hyperbolic orbits, and discuss the main technical challenges associated to each case.


Link to join: https://teams.microsoft.com/l/meetup-join/19%3ameeting_OGM3OTk5NzQtZWEwZS00ZmUyLTk3MGUtZjFhY2M5OTU2MjI1%40thread.v2/0?context=%7b%22Tid%22%3a%2267bda7ee-fd80-41ef-ac91-358418290a1e%22%2c%22Oid%22%3a%22f3250584-4b5f-48fa-a897-08e77f2246b7%22%7d
---

Wednesday 14th May at 3.45pm, C4 Physics – Astronomy Weekly Seminar

Prof Clive Tadhunter (Sheffield)

Triggering quasars in the local universe


The literature contains conflicting claims on the importance of mergers in triggering the most luminous quasar-like AGN activity. Part of this may be related to the classification methodology and issues surrounding the subtraction of the bright nuclear psf for the type I AGN, but I will argue that the dominant factor is likely to be surface brightness depth. This can explain the apparent differences between HST- and ground-based estimates of merger rates for quasar host galaxies. Using new results from ground-based observations with high surface brightness depth of samples of 3CR, 2Jy and SDSS-selected type 2 quasar sources as an example, I will demonstrate that mergers are likely to be the dominant, if not sole, triggering mechanism for quasars in the local Universe. I will also stress that cosmological surface brightness dimming makes it particularly challenging to establish merger rates for quasar host galaxies at high redshifts. Finally, I will show how multi-wavelength observations can be used to investigate the nature of the triggering mergers.
---

Thursday 15th May at 1pm, A113 CAPT – Astronomy Lunch Talk

Nina Hatch

Can intracluster light be used to shed light on the nature of dark matter?


Over the past 2 years there has been an explosion in the number of people researching intracluster light (ICL), within our department. In this talk I will explain how much of the ICL research done in our department fits together to answer a single question: can ICL be used to shed light on the nature of dark matter? I will show how ICL can probe the shape, kinematics and profile of dark matter halos, and how these measurements give insight into dark matter.


Thursday 15th May at 3pm, A113 CAPT – Particle Cosmology Journal Club

Fridays at 4pm, CAPT Foyer – CAPT Cakes
---
If you have any events/visitors you would like included in next week’s bulletin, please let me know.


Best wishes

Ella

Ella Batchelor (she/her)
Administrator

School of Physics & Astronomy

University of Nottingham
A112a Centre for Astronomy & Particle Theory
University Park
Nottingham, NG7 2RD

+44 (0) 115 74 86778 |  nottingham.ac.uk<http://nottingham.ac.uk/>

[cid:image001.png at 01DBC317.1B548670]

Follow us
facebook.com/uniofnottingham<http://facebook.com/TheUniofNottingham>
twitter.com/uniofnottingham<http://twitter.com/UniofNottingham>
youtube.com/nottmuniversity<http://youtube.com/nottmuniversity>
instagram.com/uniofnottingham<http://instagram.com/uniofnottingham>
linkedin.com/company/university-of-nottingham<http://linkedin.com/company/university-of-nottingham>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.nottingham.ac.uk/pipermail/astro/attachments/20250512/c7e10c5a/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 190221 bytes
Desc: image001.png
URL: <http://lists.nottingham.ac.uk/pipermail/astro/attachments/20250512/c7e10c5a/attachment-0001.png>
-------------- next part --------------
_______________________________________________
CAPT mailing list
CAPT at lists.nottingham.ac.uk
https://lists.nottingham.ac.uk/mailman/listinfo/capt