[Astro] [CAPT] CAPT Weekly Bulletin (w/c: 20-01-25) UPDATED

[Ella Batchelor]

Tuesdays at 11am, CAPT Foyer – Astro Coffee



Tuesdays at 11.30am, A113 CAPT -  Astronomy Journal Club



Tuesday 21st January at 1pm, A113 CAPT – Particle Cosmology and Gravity Seminar
Ramkishor Sharma  (Prague Institute of Physics)
Generation of Magnetic Fields during Inflation


Magnetic fields have been observed in galaxies, galaxy clusters, and even in the intergalactic medium. While astrophysical mechanisms can account for the magnetic fields in galaxies and galaxy clusters, they may not fully explain the presence of magnetic fields in the intergalactic medium. In this talk, I will discuss the generation of these large-scale magnetic fields in the early universe, potentially arising during the inflationary era. I will present my work, which addresses the challenges associated with generating these fields during inflation. Furthermore, I will discuss our recent work exploring the possibility of magnetic field generation In the Spectator Chromo-Natural Inflation (SCNI) model. In this model, inflationary magnetogenesis is realized by identifying the non-Abelian sector of SCNI with the SU(2)_L sector of the Standard Model, providing a novel mechanism for the emergence of primordial magnetic fields during inflation.


Links 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
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Thursday 23rd January at 1pm, A113 CAPT – Astronomy Lunch Talk

Ke Ma
1D Lya power spectrum measurements from massive spectroscopic surveys


The Lyman-Alpha Forest, a series of hydrogen absorption lines observed in high-redshift QSO spectra, serves as a crucial observational probe of the IGM. Measurements of the 1D power spectrum of the Lyman-Alpha transmitted flux (P_Lyα​) provide valuable insights into the thermal and ionization history of the IGM, while constraining cosmological and astrophysical parameters.

To assess the capabilities and precision of P_Lyα​ measurements across various spectroscopic surveys, we have developed a comprehensive pipeline for generating mock datasets. This pipeline accounts for key observational and astrophysical effects, including spectral resolution, instrumental noise, contamination from metal lines, high-column-density systems, continuum misplacement, and their associated systematics.
In this talk, I will present two of my ongoing projects based on applications of these mocks. The first explores the use of WEAVE-QSO to detect signatures of the patchy reionization. The second focuses on refining models for the power spectrum of metal absorption lines, such as Si II and Si III, which are correlated with Lyman-Alpha absorption.



Thursday 23rd January at 3pm, A113 CAPT – Particle Cosmology Journal Club

This week will be general journal club
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Fridays at 4pm, CAPT Foyer – CAPT Cakes

Friday 24th January at 7pm, Djanogly Gallery, Lakeside Arts – Cosmic Titans exhibition opening
Be among the first to enjoy this ambitious new exhibition, bringing together the worlds of art and science to explore the quantum universe, with new works by nine artists.

Enjoy the evening with a complimentary drink.

Find out more about the exhibition here<https://www.lakesidearts.org.uk/exhibition/cosmictitans/?dm_i=7MKM%2c8RFL%2cJFFTO%2c11JXD%2c1>.
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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/>

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