6957: Seminar on cosmology and selected problems in gravitational lensing research (master in astrophysics)
I am organising the weekly seminar on cosmology and gravitational lensing. One goal of our seminar is to get informed about the work of our colleagues. Another goal is to open students a window to the nitty-gritty details of research and to offer an environment where they can practise their presentation skills.
Mail group
There is a mail group for the seminar that everybody can subscribe to here.
Time and venue
If not stated otherwise via email, the seminar meets every
| Tuesday 2pm-3pm in room R0.008 at the Argelander Institute (if announced) |
List of upcoming seminars 2025
A list of planned talks follows. Note that I am not updating the list daily; subscribe to the seminar mailgroup to be kept up-to-date.
| Date | Speaker | Title of talk |
|---|---|---|
| Jan 21th | SU | 2025 TBD |
| Jan 7th | SH (UC, Santa Cruz) |
First-year cosmology results from DESI |
(past seminars of 2024 follow from here) |
||
| until end 2024 | no seminar | |
| Aug 27th | ER | Towards an application of fourth-order shear statistics (Master Colloq.) |
| July 30th | BB (IfA Edinburgh) |
Towards classifying our Universe with neural networks |
| July 2nd | ML | Investigating the detectability of fourth-order lensing statistics in current surveys |
| Mar 12th | PSt | A Relative Photometric Self-Calibration Procedure for the VIS Instrument on Euclid (Master Colloq.) |
| until Jan 30th | no seminar | |
(past seminars of 2023 follow from here) |
||
| Dec 19th | PSt | cancelled; postponed to Jan/Feb 2024 |
| Dec 12th | AE | postponed to Jan/Feb 2024 |
| Dec 5th | SS | Studying AGN feedbacks in galaxy formation at high redshift (Master Colloq.) |
| Nov 28th | TA | Identification of Protohalos with Deep Learning (Master Colloq.) |
| Nov 7th | DB | Approximate N-body Simulations using Generative AI (Master Colloq.) |
| Oct 17th | SH | The Impact of Masking on the Covariance of second-order Cosmic Shear Statistics (Bachelor Colloq.) |
| Sep 26th | JS (University of Trieste) |
Systematic uncertainties and covariances for galaxy clustering estimators |
| Aug 29th | PB and LP | Cosmology from second- and third-order shear statistics in the KiDS-1000 data |
| Aug to Oct | summer break (with occasional exceptions) | |
| July 11th | NW | The analytical cross-covariance of the second- and third-order cosmic shear statistics (Master colloq.) |
| July 4th | JB (Kansas State University) |
Modelling of the BAO feature in Bispectrum |
| June 13th | AS (MPE Munich) |
Cosmological implications of the full shape of anisotropic clustering measurements in BOSS and eBOSS |
| May 30th | no seminar (pentecost) | |
| May 23rd | BS | Why dwarf galaxies (don’t) quench? |
| May 16th | KC (University of Florida) |
Line-Intensity Mapping in Cosmological Hydrodynamic Simulations |
| May 9th | RS (University of New York) |
Large Scale Structure with Dispersion and Higher Cumulants (virtual) |
| Apr 25th | MK | Investigating the assumptions of the EFTofLSS |
| Apr 18th | RS | Calculating excess mass around KiDS galaxy pairs on large scale with G3L |
| Mar 28th | JD | Improving the PSF-anisotropy correction in Metacalibration shear measurements with machine learning (Master Colloquium) |
| Mar 21st | AN | Accurate gravitational shear estimation with shallow machine learning |
| Mar 14th | CR (University of Vienna) |
Critical phenomena and cosmological perturbations at the extreme |
| Mar 7th | PB | Density split statistic in cosmic shear survey: Generalisation and its application to the Kilo degree survey (PhD colloq.) |
| Feb 21st | no seminar (carneval) | |
| Feb 14th | NW | The covariance between second- and third-order cosmic shear statistics |
| Feb 7th | LL | The covariance of third-order shear statistics |
| Jan 31st | JD | Improving the PSF-anisotropy correction in metacalibration shear measurements |
| Jan 24th | PS | Scientific Writing |
| Jan 11th | SIF (ITA, Oslo) |
Massive galaxy mock production and the use of Big Data frameworks |
| until Jan 10th | no seminars | |
(past seminars of 2022 follow from here) |
||
| Dec 22nd | PS | Euclid VIS calibration |
| Dec 20th | AN (Princeton University) |
An informal update on cosmic shear from HSC & the DESC nonlinear bias challenge |
| Nov 22th to Dec 13th | no seminar | |
| Nov 15th | SH | Cosmological parameters from third-order shear statistics |
| Nov 1st | public holiday | |
| Oct 25th | EM | Exploiting the clustering of cosmic voids as a novel cosmological probe |
| August to October | summer break | |
| May 24th | PB | Higher Order Statistics with the density split statistics (virtual) |
| Apr 26th | no seminar (annual EC meeting) | |
| Apr 12th | MK | Testing the assumptions of the EFTofLSS (virtual) |
| Apr 6th (WED) | AN | MomentsML: using supervised learning to get accurate shear estimates (virtual) |
| Mar 29th | EG | Quantifying the Effects of Blended Galaxies in Galaxy Cluster Regions (virtual) |
| Mar 22nd | HZ | An introduction to Metacalibration and its application for Euclid (virtual) |
| Mar 15th | YF | Mechanical feedback from stellar winds with an application to galaxy formation at high redshift (virtual) |
| Feb 3rd | DS | Preparing for weak lensing measurements with the Euclid space probe (virtual) |
(past seminars of 2021 follow from here) |
||
| Feb 2nd | KL | Galaxy Cluster Mass Estimation with CMB Lensing (virtual) |
| Feb 9th | MC | Quantification of CIB contamination into ILC-extracted tSZ maps for two experiments SO and SO+FYST (virtual) |
| Mar 2nd | SH | Modelling cosmic shear from the matter bispectrum (virtual) |
| Mar 9th | MS | How accurately can the weak lensing mass bias be determined? (virtual) |
| Mar 30th | DA | The matter bispectrum: perturbation theory vs. N-body (virtual) |
| Apr 13th | AP | Modeling the void size function and its cosmology dependence in galaxy surveys (virtual) |
| Apr 20th | YN | Master Colloquium: Modified COSEBIs for cosmic shear analaysis (virtual) |
| Jun 15th | JLvB | KiDS-1000 redshifts revisited -- calibration with precision photometric redshifts (virtual) |
| Jul 22nd | DS | Preparing for weak lensing measurements with the Euclid space probe (virtual) |
| Oct 12th | EG | Investigation of Magnification Effects on Source Galaxies in Galaxy-Galaxy Lensing (virtual) |
| Oct 19th | BS | When HeII goes to HeIII, onset and evolution of Helium Reionization (virtual) |
| Oct 26th | AM | Master Colloquium: Measuring kinematic Sunyaev-Zel'dovich signal via peculiar velocity reconstructions (virtual) |
| Nov 2nd | LP | Fast and efficient estimators for weak lensing survey (virtual) |
| Nov 9th | LL | Speeding up calculations -- an introduction to the use of GPUs in scientific computing with examples (virtual) |
| Nov 16th | HZ | Weak lensing mass estimates of the most distant galaxy clusters in the 2500 sq. deg. SPT-SZ Survey (virtual) |
| Nov 23rd | PS | Pure-mode correlation functions, application to KiDS-1000, and ambiguous modes (virtual) |
| Nov 30th | MC | On the road to percent accuracy: The “Reaction” Way (virtual) |
| Dec 7th | AE | A (biased) view on enhancing LSS analyses for next-gen surveys (virtual) |
Seminar archive
Since 2013 we have collected copies from all seminar slides, whenever possible, for our seminar archive.
The archive is only accessible from inside the AIfA though.
In a nutshell: General rules for speakers
The seminar is a great opportunity to practise and improve your presentation skills. Especially graduate and PhD students should seize this opportunity.
Please consider the following guideline for your presentation:
-
Aim at a presentation that fits into 30 minutes excluding discussions. All in all, the seminar must not be longer than one hour.
-
Focus only on one or two ideas in your talk.
-
With more information squeezed into your talk you risk that nothing reaches your audience rather than more.
-
If there is more you would like to talk about, just ask for another seminar slot!
-
Dedicate the first couple of slides, or the first few minutes of your talk, to a brief, very general introduction (the big idea).
-
Imagine talking to friends that work in a totally different trade. Most of your colleagues are not exactly working on stuff you are working on. Importantly, there are likely new students that have never heard about your topic.
-
Use one minute for each slide and at least ten minutes for each new idea as rule-of-thumb.