Imprint of Massive Neutrinos on Persistent Homology (Morphology) of Large-Scale Structure

Mohammad Hossein Jalali Kanafi

Department of Physics, Shahid Beheshti University

Abstract:

The morphology of the cosmos provides valuable information about the structure of the cosmic web, which can be used for cosmological inferences. In this talk, I will discuss the capability of Persistent Homology (PH) as a morphological tool to investigate the impact of massive neutrinos on the Large-Scale Structure (LSS). PH naturally addresses the multi-scale topological characteristics of the LSS as a distribution of clusters, loops, and voids. Utilizing the Fisher forecast formalism, I will provide a quantitative assessment about the constraining power of some PH vectorizations to estimate the parameters of the $\nu \Lambda CDM$ model.

یکشنبه 15 مهر 1403، ساعت 17:00

Sunday 6 October 2024 – 17:00 Tehran Time

Hybrid Seminar

دانشکده فیزیک – طبقه اول – کلاس فیزیک 3 Physics Department – first floor – Room Physics 3 /

https://vc.sharif.edu/ch/cosmology

🇪🇸 Postdoctoral position in extragalactic radio astronomy 🇪🇸

We invite applications for a postdoctoral position of two years duration at Universidad Complutense de Madrid (Spain) to work with Dr. Shane P. O'Sullivan on extragalactic radio surveys related to cosmic magnetism science.

The postdoctoral researcher will work with data from ongoing radio polarization surveys, such as the LOFAR Two-Metre Sky Survey and the ASKAP-POSSUM survey, to constrain the properties of cosmic magnetic fields across a wide range of physical scales and use the results to test models for their origin. They will also be involved in the preparation for future projects with the Square Kilometre Array (SKA) telescope, which Spain is a full member of.

The successful candidate will become part of the Extragalactic Astrophysics and Astronomical Instrumentation group of UCM (GUAIX), as well as the Institute of Particle Physics and the Cosmos (IPARCOS). See https://guaix.ucm.es/home/science/cosmic-magnetic-fields for more details.

Applicants should have a PhD in Astrophysics and experience in radio astronomy.

Applications are especially encouraged from people from underrepresented groups.

Interested candidates should email their CV (including the names of two referees), a motivation letter (max. 1 page) and a summary of research accomplishments to date (max. 1 page) to [email protected] by 25 November 2024. The earliest start date will be mid-Feb 2025.
Publication Start Date
2024 Oct 02
Application Deadline
2024 Nov 25

🇳🇱 PhD positions at the University of Amsterdam 🇳🇱

The Anton Pannekoek Institute for Astronomy (API) at the University of Amsterdam invites applicants for PhD positions in astronomy and astrophysics. The positions are open to candidates from any country. The institute provides a stimulating, international environment in a city where English is a common language. Of our current PhD candidates, over 70% are foreign and over 40% are female. You execute a vigorous research program, under the supervision of one or more faculty members. Positions will be available in fields of research where the institute is active, including planet formation and exoplanets, stellar astrophysics, astrophysics of neutron stars and black holes, and the detection and characterization of radio counterparts of gravitational wave sources.

Link to Online Application
https://vacatures.uva.nl/UvA/job/PhD-Positions-in-Astronomy-and-Astrophysics/804105602/
Publication Start Date
2024 Oct 01
Application Deadline
2024 Nov 04

Journal Club: Experiments & Phenomenology / Hybrid format

Date:

Monday, Jul 1, 2024 / دوشنبه، 11 تیر 1403

Time:

11:00 AM - 12:00 PM (Tehran time)

Speaker:

Dr. Saeedeh Afhami

Affiliation:

Iranian Light Source Facility & School of Particles and Accelerators, IPM

Title:

Non-Evapourable Getters Coating, a novel route to achieve ultra high vacuum

Title in Persian:

لایه نشانی جاذب های غیر تبخیری، مسیری جدید برای دستیابی به خلاء بسیار بالا

Abstract:

The search for an effective solution to the problem of pumping conductance-limited vacuum systems, as those for particle accelerators, lead, at the end of 1995, to the start of the development of Non-Evaporable Getters (NEG) thin film coatings at CERN. Coating the whole inner surface of a vacuum chamber, after dissolving the NEG oxide layer by heating (activation), transforms it from a source of
gas into a pump providing very high pumping speed per unit length. In this talk, we will present the NEG physics and also describe how discharge voltage, magnetic field strength, and pressure effect on the deposition rate.

Based on: https://arxiv.org/pdf/2006.01537

Meeting Place: Seminar Room, School of Particles and Accelerators, IPM

Link to Join Virtually: https://meet.google.com/bda-vsem-tuv

?? PhD and Postdoc Positions in Lorentzian Geometry/General Relativity/Metric Geometry, Vienna, Austria ??

Contact:  ef-applications.mathematics[AT]univie.ac.at
Location:  Vienna, Austria

We are seeking to fill up to five PhD and four Postdoc positions within the research project

A new Geometry for Einstein’s Theory of Relativity and beyond

The project is situated at the intersection of Lorentzian Geometry, General Relativity, Metric Geometry and Optimal Transport, and has received major funding by the Austrian Science Fund (FWF) in the framework of its “Emerging Fields” program.

We are looking for exceptional candidates with a strong background in at least one, preferably several, of the following fields: Riemannian/Lorentzian geometry, functional analysis and measure theory, optimal transport, metric geometry, calculus of variations, geometric analysis, mathematical General Relativity.

https://ef-geometry.univie.ac.at/call-for-praedoc-and-postdoc-positions/

ef-geometry.univie.ac.at

Call for praedoc (PhD students) and postdoc positions – A new Geometry for Einstein’s Theory of Relativity & Beyond

Emerging Fields project - A new Geometry for Einstein’s Theory of Relativity & Beyond. This project is funded by the FWF and based at the Faculty of Mathematics of the University of Vienna

??PhD Scholarships in Astrophysics??

Institution
University of Melbourne
Department
School of Physics
Number of Positions Available
10
Work Arrangement
In-Person
In-Person Location(s)
Parkville VIC
Australia

Job Description

We invite applications from exceptionally talented students planning a PhD in astrophysics or cosmology for PhD scholarships at the University of Melbourne.

The University of Melbourne is engaged in cutting edge research in observational and theoretical astrophysics, cultural and Indigenous astronomy, high energy astrophysics and transients, state of the art simulations of the early Universe, LIGO gravitational wave analysis, high-redshift galaxies, the cosmic microwave background, and 21 cm observations. The group leads SpIRIT - the first mission of the Australian Space Agency which launched in 2023 and will detect and study high energy transients and gravitational wave counterparts. The group also hosts nodes of two research centres, OzGRAV and ASTRO-3D.

The scholarships come with a tax-free stipend of AUD$37,000/yr (in 2024) for 3.5 years.

Applicants should submit an Expression of Interest through the link, including a statement of research interests, CV, transcripts if possible, and two reference letters by July 26 (this deadline is for international students). Successful candidates will be supported through the formal U. Melbourne application process.

Established in 1853, the University of Melbourne helps graduates become well-rounded, thoughtful and skilled professionals who make a positive impact across the globe. It's consistently ranked among the leading universities in the world, with international rankings placing it as #1 in Australia and #31 in the world (THE World Rankings 2021). Our research helps solve challenges the world is facing today and into the future. We're tightly connected with our communities, at home and around the globe; a connection that enriches our learning, teaching and research. The University of Melbourne offers an unsurpassed learning experience on an urban campus located on the edge of downtown Melbourne. Melbourne, a bustling metropolis of around 5 million people, frequently stars on lists of the most liveable cities in the world.

Compensation and Benefits
Compensation Type
Salary
Currency
323
Stipend
$37,000.00AUD
Application Details
Link to Online Application
https://forms.gle/NDsySwincyCJQyjj7
Publication Start Date
2024 Jun 27
Application Deadline
2024 Jul 26
Inquiries
Name
Astrophysics Selection Panel
Email
[email protected]

? ۱۰ تا از آخرین تصاویر جذاب تلسکوپ هابل ?

لینک گزارش
@PDATLAB