########################################### Table of Contents ########################################### 1. Conferences 1.1. BIFROST - Black hole Insights: navigating the FROntiers of SpaceTime, Odense, Denmark 1.2. Physics and Astrophysics of Neutrino-Dense Environments, Aspen, CO, USA 1.3. Particles, Gravitation and the Universe: from Quantum Mechanics to Quantum Gravity, Hanoi, Vietnam 1.4. Quantum analogues, Luxembourg 1.5. Belgian-Dutch Gravitational Wave Meeting, Nijmegen, The Netherlands 1.6. 35th Midwest Relativity Meeting and EricFest, Guelph, Canada 1.7. South African Gravity Society Meeting 2025, Stonehenge in Parys, South Africa 2. Jobs 2.1. Master's in Mathematical Physics, Troy, AL, USA 2.2. PhD Position in Gravitational-Wave Physics, Hong Kong 2.3. ESA Research Fellowships in Space Science, Madrid (Spain), Noordwijk (Netherlands), Baltimore (USA) 2.4. DFG-funded postdoc position in Relativistic Theoretical Astrophysics, Frankfurt, Germany 3. News ============================================== 1. Conferences ============================================== 1.1. BIFROST - Black hole Insights: navigating the FROntiers of SpaceTime, Odense, Denmark --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=29738 Starting: 2025-10-20 to 2025-10-22 Location: Odense, Denmark Additional Information: https://event.sdu.dk/bifrost-blackholeinsightsnavigatingthefrontiersofspacet... Contact: vellucci[AT]qtc.sdu.dk BIFROST is a dedicated workshop aimed at gathering leading experts in different aspects of black hole physics, from observational astronomy to theoretical physics. Together, participants will explore novel ideas that will help bridge classical and quantum gravity. The workshop is jointly organized by organized by the Quantum Field Theory Center (QTC) at the Danish Institute for Advanced Studies, the University of Southern Denmark (SDU) and the Department of Physics "Ettore Pancini" of Federico II University. The event will take place on QTC premises at the Danish Institute for Advanced Study, in Odense, Denmark. Invited speakers: Ana Alonso-Serrano (Max Planck Institute, Potsdam) Giacomo Cacciapaglia (Sorbonne University) Raul Carballo Rubio (IAA Granada) Vitor Cardoso (Niels Bohr Institute)* Steven Carlip (UC Davis) Salvatore Capozziello (SSM, Federico II U.) Mariafelicia De Laurentis (Federico II U.) Netta Engelhardt (MIT)* Antonia M. Frassino (SISSA) Giulia Gubitosi (Federico II University) Carlos Herdeiro (Aveiro U.) Stefan Hohenegger (Lyon U.) Alexandros Kehagias (National Technical University of Athens) Stefano Liberati (SISSA) Orlando Lunogo (U. of Camerino) Alessia Platania (Niels Bohr Institute) Luciano Rezzolla (Goethe U. Frankfurt IAS) ?Jessica Turner (Durham U.)* Matthias Wihelm (Univesrity of Southern Denmark) *to be confirmed +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.2. Physics and Astrophysics of Neutrino-Dense Environments, Aspen, CO, USA --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=29741 Starting: 2026-01-04 to 2026-01-09 Location: Aspen, CO, USA Additional Information: https://aspenphys.org/winter-conferences/#event5893 Contact: dur566[AT]psu.edu A thorough understanding of neutrino flavor transformation is essential for interpreting observations of neutron star mergers, core-collapse supernovae, and the early universe. Despite its significance, its impact on the dynamics of these events, as well as on their multi-messenger signals and nucleosynthesis yields, remains poorly understood. This hinders our ability to connect kilonovae observations, including recently obtained James Webb Space Telescope (JWST) spectra, with the nuclear physics of neutron-rich isotopes being unveiled at facilities such as the Facility for Rare Isotope Beams (FRIB) at Michigan State University. In the cosmological context, this physics is important for exploring lepton number constraints, and vetting beyond-standard-model possibilities with light element abundances, N_eff , the sum of neutrino masses, etc. In turn, these quantities are key targets for cosmic microwave background (CMB) Stage-4 experiments. Addressing this challenge requires expertise beyond the scope of any single research group or discipline. Progress demands a concerted, collaborative effort that bridges efforts in time-domain astronomy and cosmology, nuclear/particle theory - ranging from magnetohydrodynamics to quantum many-body theory - and neutrino experiments. The Aspen Center for Physics winter workshop is designed to unite experts across these domains, making explicit connections between the fundamental physics of neutrino flavor transformations with planning and interpreting observations in cosmology and transient science. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.3. Particles, Gravitation and the Universe: from Quantum Mechanics to Quantum Gravity, Hanoi, Vietnam --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2025/08/08/particles-gravitation-and-the... Starting: 2025-11-26 to 2025-11-28 Location: Hanoi, Vietnam Additional Information: https://hoivl-nlc-vn.github.io/pgu2025.html#overview Contact: anhky.nguyen[AT]gmail.com This edition celebrates the UN International Year of Quantum Physics and Quantum Technology (IYQ 2025), marking a global commitment to advancing quantum science. Building on the successes of PGU workshops in 2016 and 2018, PGU-3 aims to foster an interdisciplinary exchange among physicists, astro-cosmologists, and technologists. The workshop will explore the frontiers where quantum mechanics, particle physics, and gravitation converge, examining both foundational theory and emerging quantum-enabled technologies. Like its predecessors, the workshop will review cutting-edge developments, present new theoretical and experimental results, and discuss their broader scientific and technological impacts. Over the past century, physics, driven by the ideas of quantum theory, has undergone remarkable developments, offering new insights into our understanding of the Universe at both microscopic and macroscopic scales. PGU-3 welcomes leading invited speakers, contributed talks, and poster presentations. The workshop also aims to strengthen education and research in Vietnam and the Asia-Pacific region, while fostering collaboration across international institutions. Participants are encouraged to register and submit abstracts for contributed talks or posters via the workshop website. We look forward to a stimulating three-day program of plenary sessions, focused discussions, and informal networking opportunities in the vibrant city of Hanoi. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.4. Quantum analogues, Luxembourg --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=29755 Starting: 2025-09-15 to 2025-09-16 Location: Luxembourg Additional Information: https://quantum-analogues.github.io/ Contact: upala.mukhopadhyay[AT]uni.lu What have water waves, Bose-Einstein condensates, semiconductor polaritons and fibre optics in common with black holes and the expanding universe? They are all quantum analogues. An analogue is a physical system that mimics the physics of another system. For example, water going down the drain establishes the analogue of the event horizon for water waves if the flow velocity exceeds the wave velocity. Quantum analogues mimic not only the classical physics of another system, but the quantum physics. For example, Bose-Einstein condensates may produce the quantum Hawking radiation of black holes. The Hawking radiation of real black holes is all but obscured by the Cosmic Microwave Background (and even more so by accretion radiation) but not so in black hole analogues, and neither is particle creation and the Gibbons-Hawking radiation of the expanding universe. Laboratory analogues have given us a good, hands-on understanding of how these quantum processes work, that are critical to the connection between quantum mechanics, thermodynamics and gravity. These ideas have a good chance of resolving the recent tensions in cosmology by predicting of how the quantum vacuum generates what is called dark energy (for want of a more enlightening term). Quantum analogues have also become a meeting place of different communities, from fluid mechanics to astronomy, where ideas are exchanged that would otherwise remain in their scholarly boundaries, and where young researchers are educated to be open-mind. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.5. Belgian-Dutch Gravitational Wave Meeting, Nijmegen, The Netherlands --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=29765 Starting: 2025-10-27 to 2025-10-28 Location: Nijmegen, The Netherlands Additional Information: https://indico.imapp.ru.nl/event/325/overview Contact: badri.krishnan[AT]ru.nl Dear colleagues, Please save the date for the 13th edition of the Belgian-Dutch Gravitational Wave meeting to be held in Nijmegen on October 27 and 28, 2025. The aim of the meeting is to bring together physicists and astronomers interested in all aspects of gravitational-wave science, to inform each other of recent developments, discuss (strategic) topics and informally meet each other. The program will be developed soon and will include a keynote lecture and ample space for contributed talks and discussions. You can already register for the meeting and find all the information and updates at the conference website: https://indico.imapp.ru.nl/event/325/overview We hope to see many of you in October in Nijmegen! Best regards, The SOC (Beatrice Bonga, Paul Groot, Peter Jonker, Badri Krishnan, Andrew Levan, Gijs Nelemans, Lieke van Son) +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.6. 35th Midwest Relativity Meeting and EricFest, Guelph, Canada --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2025/08/22/35th-midwest-relativity-meeti... Starting: 2025-10-31 to 2025-11-02 Location: Guelph, Canada Additional Information: https://indico.global/event/14302/ Contact: epoisson[AT]uoguelph.ca Dear member of the gravitation research community, the 35th Midwest Relativity Meeting will be held at the University of Guelph on October 31 to November 2 (Friday to Sunday), 2025. The last day will be a scientific celebration of Eric Poisson's 60th birthday with invited speakers. The Midwest Relativity Meetings bring together researchers from across the Midwest and beyond to discuss a broad range of topics in gravitational physics, including cosmology, gravitational waves, numerical relativity, and quantum gravity. The primary focus of this meeting is on graduate students and postdocs, all of whom are encouraged to give talks. We encourage participation from under-represented groups, and we expect to accept all abstract submissions as long as time permits. The Blue Apple Award, sponsored by APS DGRAV, will be given for the best graduate student talk. The invited speakers at EricFest are Leor Barack, Patrick Brady, Katerina Chatziioannou, Eanna Flanagan, Scott Hughes, Sharon Morsink, Frans Pretorius, Jocelyn Read, Clifford Will. Registration is now open, and the call for abstracts will stay open until October 15. There will be a conference dinner on the Sunday evening (November 2) to wrap-up EricFest; we're told that some roasting (the figurative kind) might be involved. Registration for dinner is also open. The conference website is https://indico.global/event/14302/. Please join us in Guelph for this great occasion! On behalf of the organizers, Beatrice Bonga, Roland Haas, Philippe Landry, Luis Lehner, Tristan Pitre, Eric Poisson, Adam Pound, Berend Schneider. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1.7. South African Gravity Society Meeting 2025, Stonehenge in Parys, South Africa --------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2025/08/27/sags-2025/ Starting: 2025-11-18 to 2025-11-21 Location: South Africa Additional Information: https://indico.global/event/13404/ Contact: amare.abebe[AT]nithecs.ac.za The Centre for Space Research (CSR) at North-West University (NWU) is proud to host the 2025 South African Gravity Society (SAGS2025) conference at the unique and inspiring Stonehenge in Parys, South Africa from 18-21 November 2025. This will be a fully in-person event, offering a rich environment for collaboration and discussion. We welcome contributions from all areas of gravitational physics, including theoretical, computational, mathematical, observational, and experimental research. The scope of the conference will encompass the latest developments in: - General Relativity and Gravitation - Cosmology - Astrophysics - And related fields We especially encourage postgraduate students to attend and present their research. SAGS2025 provides an excellent platform for emerging researchers to engage with the broader scientific community. The conference will be held at the Stonehenge River Lodge on the banks of the Vaal River, nestled within the Vredefort Dome, a UNESCO World Heritage Site. This serene and picturesque setting offers a unique backdrop for stimulating scientific exchange. Parys is conveniently located approximately 120 km from O.R. Tambo International Airport (JNB) in Johannesburg and about 50 km from NWU's Potchefstroom Campus, making it accessible for both our national and international delegates. Limited financial support will be available for postgraduate students. To apply for support, please indicate your interest during the registration process and email a letter of motivation to the organisers at sagsconf2025[AT]gmail.com. Note that only students with accepted abstracts for oral presentations will be considered for financial support. Local Organising Committee (LOC) Amare Abebe (Chair) amare.abebe (at) nithecs.ac.za Christo Venter (Co-Chair) Renier Hough Shambel Sahlu Marcel van der Westhuizen Rethabile Thubisi Scientific Organising Committee (SOC) Sudan Hansraj (Chair) hansrajs (at) ukzn.ac.za Amare Abebe (Co-Chair) Anslyn John Byron Brassel Alvaro de la Cruz-Dombriz Nigel Bishop Sunil Maharaj Conference Admin: Vicki Hooper - Venues for Conferences (admin (at) venues.co.za) Lendl Fransman - NWU (lendl.fransman (at) nwu.ac.za) Kindly refer all administrative/ registration enquiries to Lendl or Vicki. All programming/ academic matters should be referred to the Chair of the LOC Amare Abebe +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ============================================== 2. Jobs ============================================== 2.1. Master's in Mathematical Physics, Troy, AL, USA ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=29762 Deadline: 2025-12-01 Location: Troy, AL, USA Additional Information: https://spectrum.troy.edu/crc/ Contact: relativity[AT]troy.edu The Department of Mathematics and Statistics and the Center for Relativity and Cosmology at Troy University is accepting applications for a master's in mathematical physics focusing in mathematical relativity, starting August 1, 2026. Our curriculum includes a study of global Lorentzian geometry, causal structure, singularity theorems, the initial value problem of the Einstein equations, quantum fields in curved spacetimes and Hawking radiation. The program offers research opportunities and funding possibilities. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.2. PhD Position in Gravitational-Wave Physics, Hong Kong ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=29771 Deadline: 2025-10-21 Location: Hong Kong Additional Information: https://forms.gle/DdBk5JGrAgG39FVP7 Contact: oahannuksela[aT]cuhk.edu.hk The CUHK, Hong Kong, invites applications for a 4-year PhD position in gravitational-wave and gravitational lensing data analysis, starting Fall 2026. About the Group: The CUHK gravitational-wave group, part of the LVK collaboration since 2016, conducts research on gravitational waves - ripples in space-time that reveal insights into extreme cosmic phenomena. We specialize in connecting gravitational-wave observations with other physics disciplines, leveraging advanced detectors that detect signals weekly. Group website: https://gw.phy.cuhk.edu.hk/ Eligibility: Applicants should have a BSc degree by the start date of the program. International applicants with a first-class honors degree (e.g., minimum GPA 3.5/4.0) from a QS-200 university and demonstrated research experience (e.g., publications, projects) may qualify for the Hong Kong PhD Fellowship Scheme (HKPFS), offering additional stipends and research support. Other applicants are also welcome to apply through standard route. How to Apply: Submit your CV and statement of purpose via the application form (https://forms.gle/DdBk5JGrAgG39FVP7). Referees should send letters directly to oahannuksela[AT]cuhk.edu.hk. Deadline: October 15, 2025 Contact: Otto Hannuksela (oahannuksela[AT]cuhk.edu.hk) +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.3. ESA Research Fellowships in Space Science, Madrid (Spain), Noordwijk (Netherlands), Baltimore (USA) ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/?p=29774 Deadline: 2025-09-22 Location: Madrid (Spain), Noordwijk (Netherlands), Baltimore (USA) Additional Information: https://www.cosmos.esa.int/fellowship Contact: victoria.grinberg[AT]esa.int We are pleased to announce the 2025 Call for Applications for the European Space Agency's Research Fellowships in Space Science. We expect to hire 5 to 6 postdoctoral fellows who will start their fellowship in fall 2026. ESA's postdoctoral Research Fellowship programme offers early-career researchers the possibility to carry out independent research in a variety of disciplines. Research Fellowships in Space Science offer the opportunity to contribute to ESA's endeavour to explore our Solar System and the Universe in the fields of heliophysics, planetary science, astrophysics, and fundamental physics. ESA Research Fellow contracts have a maximum duration of three years. Projects initially last two years and are frequently extended to a third year upon submission of a dedicated proposal. Research Fellowships in Space Science can be located at any of the following institutes: - European Space Astronomy Centre (ESAC) in Villafranca del Castillo near Madrid, Spain - European Space Research and Technology Centre (ESTEC) in Noordwijk, the Netherlands - ESA Office at Space Telescope Science Institute (STScI) in Baltimore, Maryland, USA Detailed information and a link to the application portal can be found on the fellowship webpage linked under the URL given below. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2.4. DFG-funded postdoc position in Relativistic Theoretical Astrophysics, Frankfurt, Germany ------------------------------------------------------------- Announcement on Hyperspace@GU: https://hyperspace.uni-frankfurt.de/2025/08/28/dfg-funded-postdoc-position-i... Deadline: 2025-10-15 Location: Frankfurt, Germany Additional Information: https://relastro.uni-frankfurt.de/ Contact: rezzolla[AT]itp.uni-frankfurt.de The group of Relativistic Theoretical Astrophysics in Frankfurt invites applications for an anticipated DFG-granted postdoctoral position in Relativistic Theoretical Astrophysics within the Collaborative Research Collaboration on Strong Interaction Matter (CRC-TR 211). Candidates should have a PhD in astrophysics, physics or applied mathematics. The ideal candidate will have experience with phase transitions in strongly coupled matter, particularly in the context of neutron stars and/or the early universe. Background or interest in numerical simulations is an advantage but not a prerequisite. The successful applicants will be part of an international research group at the Institute for Theoretical Physics at Frankfurt, Germany. Interests of the group span from the modelling of the physics of neutron stars and black holes, to fundamental issues in gravitational physics (https://relastro.uni-frankfurt.de/). Frankfurt am Main is a lively and international city, and Europe's financial center. The application should comprise a CV, a publication list, and a research summary and proposal (4 pages max). Applicants should also arrange for three letters of reference to be sent to the address below. Applications will have to be sent by 15.10.2025 for full consideration, but the search will remain open till the optimal candidate is found. The position is initially for two years and can be extended for two more years depending on successful performance. The expected starting date is 01.01.2026, but later appointments can be negotiated. Applications should be made electronically and sent to: Fr. Astrid Steidl: steidl[AT]itp.uni-frankfurt.de and to CC-ed to rezzolla[AT]itp.uni-frankfurt.de Goethe University is an equal-opportunity employer and is committed to increasing the number of women in research and teaching. Qualified female researchers are therefore especially encouraged to apply. Severely handicapped applicants with equal qualification and aptitude will be given preferential consideration. We prioritise diversity and are committed to creating an inclusive environment for everyone. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ============================================== 3. News ==============================================