The members of the Institute, and in particular all students and postdocs, meet every Friday from 14:00-15:00 in the 2nd Floor Coffee Room, to discuss interesting recent science papers and exciting new astrophysics discoveries, while having free, slightly unhealthy, food. Please contact Evangelia Vaikousi, or Alberto Floris to lead a discussion. The schedule for the coming weeks follows:
- Friday 2 October 2026 - Avinash Kumar
"A deep X-ray look to the most obscured quasar at z ∼ 3.6 and its environment" - Friday 25 September 2026 - Nikolas Vasilas
"Measuring AGN X-ray Variability Across Timescales with the Einstein Probe" - Friday 03 July 2026 - Gina Panopoulou
"Exploring how dust grains align in different ISM environments" - Friday 12 June 2026 - Lankeswar Dey
"The Targeted Standard Siren Cosmology with Pulsar Timing Arrays" - Friday 29 May 2026 - Namita Uppal
"A three-dimensional reconstruction of the interstellar magnetic field toward a star-forming region" - Friday 15 May 2026 - Beatriz Agis Gonzalez
"TDE 2025abcr: A Tidal Disruption Event in the Outskirts of a Massive Galaxy" - Friday 08 May 2026 - Myrto Falalaki
"The radial component of the local Galactic magnetic field in 3D" - Friday 24 April 2026 - Dmitry Blinov
"A precessing jet from a supermassive black hole: multi-wavelength observations of S5 1044+71" - Friday 27 March 2026 - Dimitris Langis
"A tidal disruption event from an intermediate-mass black hole revealed by comprehensive multi-wavelength observations" - Friday 20 March 2026 - Sara Capecchiacci
"Rapid jet ejection from PKS 0215+015 coincident with a high-energy neutrino event" - Friday 13 March 2026 - Alberto Floris
"MUSE IFU observations of galaxies hosting tidal disruption events" - Friday 06 March 2026 - Samuel Gullin
"Multi-messenger emission derived from relativistic magnetized jet dynamics using a multi-zone framework" - Friday 27 February 2026 - Avinash Kumar
"What Drives the Bimodal Distribution of Eddington-Scaled Radio Luminosity in Nearby Early-Type Galaxies?" - Friday 20 February 2026 - Marios Papoutsis
"The variability of active galaxies ─ I. Broad-band noise X-ray power spectra from XMM─Newton and Swift?" - Friday 13 February 2026 - Nicolò Belgiovine
"A Strong He II λ1640 Emitter with an Extremely Blue UV Spectral Slope at z = 8.16: Presence of Population III Stars?" - Friday 30 January 2026 - Ericka Florio
"GW231123: A Binary Black Hole Merger with Total Mass 190─265 M" - Friday 23 January 2026 - Prathamesh Ingale
"GRB 221009A: The Boat" - Friday 12 December 2025 - Lia Vaikousi
"To Be or Not To Be: The Role of Rotation in Modeling Galactic Be X-Ray Binaries" - Friday 5 December 2025 - Chrysostomos Sidiropoulos
"The "Little Dark Dot": Evidence for Self-interacting Dark Matter in the Strong Lens SDSS J0946+1006?" - Friday 28 November 2025 - Johanna Müller
"The ∞ Galaxy: A Candidate Direct-collapse Supermassive Black Hole between Two Massive, Ringed Nuclei" - Friday 14 November 2025 - Arnab Lahiry
"Introducing the DREAMS Project: DaRk mattEr and Astrophysics with Machine Learning and Simulations" - Friday 7 November 2025 - Diego Alvarez Ortega
"HerS-3: An Exceptional Einstein Cross Reveals a Massive Dark Matter Halo" - Friday 31 October 2025 - Andreas Tersenov
"AstroCLIP: a cross-modal foundation model for galaxies" and "AION-1: Omnimodal Foundation Model for Astronomical Sciences" - Friday 24 October 2025 - Cristina Lofaro
"The impact of void environment on AGN" - Friday 17 October 2025 - Vasilis Binas-Valavanis
"Delving into the depths of NGC 3783 with XRISM: I. Kinematic and ionization structure of the highly ionized outflows" - Friday 10 October 2025 - Giulia Papini
"Galaxies in voids assemble their stars slowly" - Friday 3 October 2025 - Felix Pötzl
"The Chiral Puzzle of Life" - Friday 20 June 2025 - Andreas Zezas
"The importance of stochasticity in determining galaxy emissivities and UV LFs during cosmic dawn and reionization" - Friday 13 June 2025 - Binas Valavanis Vassilis
"X-ray view of dissipative warm corona in active galactic nuclei" - Friday 6 June 2025 - Manos Zapartas
"A pulsar-helium star compact binary system formed by common envelope evolution" - Friday 23 May 2025 - Ethan Partington
"Structured ionized winds shooting out from a quasar at relativistic speeds" - Friday 16 May 2025 - Poetzl Felix
"Unveiling the largest structures in the nearby Universe: Discovery of the Quipu superstructure" - Friday 9 May 2025 - Blinov Dmitry
"The many flavours of photometric redshifts" - Friday 11 April 2025 - Agis Gonzalez Beatriz
"Embers of Active Galactic Nuclei: Tidal Disruption Events and Quasi-periodic Eruptions" - Friday 04 April 2025 - Gkogkou Athanasia
"H I Intensity Mapping Cross-correlation with Thermal Sunyaev–Zel'dovich Fluctuations: Forecasted Cosmological Parameter Estimation for FAST and Planck" - Friday 28 March 2025 - Vasilas Nikolas
"The 2022 Outburst of IGR J17091–3624: Connecting the Exotic GRS 1915+105 to Standard Black Hole X-Ray Binaries" - Friday 21 March 2025 - Uppal Namita
"B-fields and Dust in Interstellar Filaments Using Dust Polarization (BALLAD-POL). II. Testing the Radiative Torque Paradigm in Musca and OMC-1" - Friday 14 March 2025 - Hatzidimitriou Despina
"The Extragalactic Program of the Gaia Mission" - Friday 07 March 2025 - Lofaro Maria Cristina
"A new census of dust and polycyclic aromatic hydrocarbons at z = 0.7–2 with JWST MIRI" - Friday 21 February 2025 - Gullin Samuel
"Neutrino Whispers from Dark Stars Seeding Supermassive Black Holes" - Friday 14 February 2025 - Daoutis Babis
"Star-forming Nuclear Clusters in Dwarf Galaxies Mimicking Active Galactic Nucleus Signatures in the Mid-infrared" - Friday 31 January 2025 - Papoutsis Marios
"Unprecedented Central Engine "Breathing" Phenomenon in an Active Supermassive Black Hole" - Friday 24 January 2025 - Lahiry Arnab
"Identification of 4FGL Uncertain Sources at Higher Resolutions with Inverse Discrete Wavelet Transform" - Friday 17 January 2025 - Capecchiacci Sara
"A Two-Week IXPEIXPE Monitoring Campaign on Mrk 421" - Friday 13 December 2024 - Floris Alberto
"CXOU J005245.0-722844: discovery of a Be star/white dwarf binary system in the SMC via a very fast, super-Eddington X-ray outburst event" - Friday 29 November 2024 - Vaikousi Evangelia
"CXOU J005245.0-722844: discovery of a Be star/white dwarf binary system in the SMC via a very fast, super-Eddington X-ray outburst event" - Friday 22 November 2024 - Floris Alberto
"The properties of AGN in dwarf galaxies identified via SED fitting" - Friday 15 November 2024 - Álvarez-Ortega Diego
"A JVLA, LOFAR, e-Merlin, VLBA and EVN study of RBS 797: can binary SMBHs explain the outburst history of the central radio galaxy?" - Friday 8 November 2024 - Kyritsis Elias
"The High-mass X-Ray Binary Luminosity Functions of Dwarf Galaxies" - Friday 1 November 2024 - Langis Dimitrios Alkinoos
"Common origin for black holes in both high mass X-ray binaries and gravitational-wave sources" - Friday 25 October 2024 - Fernandez Aranda Roman
"Galaxy evolution in the post-merger regime. II -- Post-merger quenching peaks within 500 Myr of coalescence" - Friday 18 October 2024 - Kumar Avinash
"Here There Be (Dusty) Monsters: High Redshift AGN are Dustier Than Their Hosts" - Friday 26 April 2024 - Tersenov Andreas
"Fast likelihood-free inference in the LSS Stage IV era" - Friday 19 April 2024 - Casadio Carolina
"The power of relativistic jets: a comparative study" - Friday 29 March 2024 - Paggi Alessandro
"Dark Matter in Fractional Gravity. I. Astrophysical Tests on Galactic Scales" - Friday 22 March 2024 - Souropanis Dimitris
"Connecting stellar and galactic scales: Energetic feedback from stellar wind bubbles to supernova remnants" - Friday 15 March 2024 - Missaglia Valentina
"Investigating X-ray Emission in the GeV-emitting Compact Symmetric Objects PKS 1718-649 and TXS 1146+596" - Friday 23 February 2024 - Daoutis Charalampos
"Machine learning identified molecular fragments responsible for infrared emission features of polycyclic aromatic hydrocarbons" - Friday 09 February 2024 - Kumar Avinash
"Searching for the Sources of Excess Extragalactic Dispersion of FRBs" - Friday 26 January 2024 - Papoutsis Marios
"The X-ray polarization of the Seyfert 1 galaxy IC 4329A" - Friday 19 January 2024 - Lahiry Arnab
"Cosmology with multiple galaxies" - Friday 1 December 2023 - Fernandez Roman
"Black holes regulate cold gas accretion in massive galaxies" - Friday 24 November 2023 - Tsouros Alexandros
"Scattering Spectra Models for Physics" - Friday 10 November 2023 - Alvarez Ortega Diego
"A Standard Siren Measurement of the Hubble Constant Using Gravitational-wave Events from the First Three LIGO/Virgo Observing Runs and the DESI Legacy Survey" - Friday 3 November 2023 - Lofaro Cristina
"AGN Selection and Demographics: A New Age with JWST/MIRI" - Friday 20 October 2023 - Poetzl Felix
"Effects of heterogeneous data sets and time-lag measurement techniques on cosmological parameter constraints from MgII and CIV reverberation-mapped quasar data" - Friday 09 June 2023 - Mastorakis Michalis
"Bimodal black-hole mass distribution and chirp masses of binary black-hole mergers" - Friday 02 June 2023 - Ruchika Dhaka
"Spectral and Timing Evolution of Black Hole X-ray Binary GRS1915+105: Insights from Quasi-Periodic Oscillations and Spectral States" - Friday 19 May 2023 - Fernandez Aranda Roman
"Spatially resolved dust properties and quasar-galaxy decomposition of HyLIRG at redshift 4.4" - Friday 12 May 2023 - Triantafyllou Nikos
"Photometric Redshift Estimation with Convolutional Neural Networks and Galaxy Images: A Case Study of Resolving Biases in Data-Driven Methods" - Friday 05 May 2023 - Andreas Tersenov
"Probabilistic Mass Mapping with Neural Score Estimation" - Friday 28 April 2023 - Droudakis Konstantinos
"Observing the onset of the accretion wake in Vela X-1" - Friday 31 March 2023 - Maharana Siddharth
"SPLOT: a Snapshot survey for Polarised Light in Optical Transients?" - Friday 24 March 2023 - Daoutis Charalambos
"Evidence for Black Holes in Green Peas from WISE colors and variability?" - Friday 17 March 2023 - Dr Paolo Bonfini
"ChatGPT: i.e., how does it feel to be outsmarted by a machine?" - Friday 10 March 2023 - Diego Alvarez-Ortega
"Classifying Unidentified X-Ray Sources in the Chandra Source Catalog Using a Multiwavelength Machine-learning Approach" - Friday 3 March 2023 - Lofaro Cristina Maria
"High-resolution Hubble Space Telescope Imaging Survey of Local Star-forming Galaxies. I. Spatially Resolved Obscured Star Formation with Hα and Paschen-β Recombination Lines" - Friday 24 February 2023 - Mandarakas Nikolaos
"Dust polarization spectral dependence from Planck HFI data. Turning point on CMB polarization foregrounds modelling" - Friday 17 February 2023 - Korkidis George
1. "A Test of the Cosmological Principle with Quasars"
2. "A Challenge to the Standard Cosmological Model" - Friday 10 February 2023 - Elias Kyritsis
"The Redshift Evolution of Ultraluminous X-Ray Sources out to z 0.5: Comparison with X-Ray Binary Populations and Contribution to the Cosmic X-Ray Background" - Friday 27 January 2023 - Romanopoulos Stylianos
"Non-parametric inference of the neutron star equation of state from gravitational wave observations" - Friday 9 December 2022 - Zapartas Manos
"Stripped-envelope supernovae from single and binary massive stars, and their companions" - Friday 2 December 2022 - Tsouros Alexandros
"A method for reconstructing the Galactic magnetic field using dispersion of fast radio bursts and Faraday rotation of radio galaxies" - Friday 25 November 2022 - Loudas Nikos
"The Odd Dark Matter Halos of Isolated Gas-rich Ultradiffuse Galaxies" - Friday 18 November 2022 - Konstantinou Anna
"Effects of feedback on galaxies in the VELA simulations: elongation, clumps and compaction" - Friday 04 November 2022 - Felix Poetzl
"WISDOM Project - XIII. Feeding molecular gas to the supermassive black hole in the starburst AGN-host galaxy Fairall 49" - Friday 03 June 2022 - Zezas Andreas
"First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way"
"First Sagittarius A* Event Horizon Telescope Results. III. Imaging of the Galactic Center Supermassive Black Hole" - Friday 20 May 2022 - Kovlakas Konstantinos
"POSYDON: A General-Purpose Population Synthesis Code with Detailed Binary-Evolution Simulations" - Friday 06 May 2022 - Antoniadis John
"Job applications and career development for PhDs and young astronomers" - Friday 01 April 2022 - Daoutis Charalampos
"Self-consistent Predictions for LIER-like Emission Lines from Post-AGB Stars" - Friday 18 March 2022 - Politakis Charalampos
Deep Space Network - Friday 11 March 2022 - Droudakis Konstantinos
"On the Mass and Magnetic Field of the Neutron Star in the Ultraluminous X-Ray Source NGC 300 ULX1" - Friday 25 February 2022 - Aguilera Dena D.R.
"Partial-envelope stripping and nuclear-timescale mass transfer from evolved supergiants at low metallicity" - Friday 18 February 2022 - Blinov Dmitry
"The discovery of a radio galaxy of at least 5 Mpc" - Friday 11 February 2022 - Mandarakas Nikos
"Correlated orientations of the axes of large quasar groups on Gpc scales" - Friday 04 February 2022 - Romanopoulos Stelios
"Gravitational Waves: Detection, Analysis and Parameter Estimation" - Friday 28 January 2022 - Chanlaridis Savvas
"Eccentric millisecond pulsars by resonant convection"
Presentation: [PDF file] - Friday 17 December 2021 - Tsouros Alexandros
"Charting nearby dust clouds using Gaia data only" - Friday 10 December 2021 - Papadaki Katerina
"Hamiltonian Neural Networks" - Friday 12 November 2021 - Kyritsis Elias
"Star formation rates and stellar masses from machine learning"
Presentation: [PDF file] - Friday 29 October 2021 - Mandarakas Nikolaos
"A Candidate Kiloparsec-scale Quasar Pair at z = 5.66" - Friday 15 October 2021 - Korkidis Georgios
"Clusters have edges: the projected phase-space structure of SDSS redMaPPer clusters?" - Friday 11 June 2021 - Konstantinou Anna
"The Phosphene Controversy: Is it Phosphene? Is there life on Venus?" - Friday 28 May 2021 - Fernandez Aranda Roman
"A hidden population of high-redshift double quasars unveiled by astrometry" - Friday 14 May 2021 - Skalidis Rafail
"High-accuracy estimation of magnetic field strength in the interstellar medium from dust polarization" - Friday 16 April 2021 - Romanopoulos Stylianos
"The POEMMA (Probe of Extreme Multi-Messenger Astrophysics) Observatory" - Friday 2 April 2021 - Mandarakas Nikolaos
"Integrated Optical Polarization of nearby Galaxies" - Friday 26 March 2021 - Aguilera Dena David
"Maximum Black Hole mass across Cosmic Time"
Presentation: [PDF file] - Friday 19 March 2021 - Politakis Charalampos
"Formation of millisecond pulsars with helium white dwarfs, ultra-compact X-ray binaries and gravitational wave sources"
Presentation: [PDF file] - Friday 05 March 2021 - Konstantinou Anna
"The physical and the geometrical properties of simulated cold HI structures"
Presentation: [PDF file] - Friday 26 February 2021 - Liodakis Giannis
"High-energy emission from tidal disruption events in active galactic nuclei" - Friday 19 February 2021 - Fernandez Aranda Roman
"Half of the most luminous quasars may be obscured: Investigating the nature of WISE - selected hot dust obscured galaxies" - Friday 12 February 2021 - Leonidaki Ioanna
"Modeling particle acceleration and non-thermal emission in supernova remnants" - Friday 05 February 2021 - Blinov Dmitry
"Evidence of the Gaia--VLBI position differences being related to radio source structure" - Friday 11 December 2020 - Kiehlmann Sebastian
"The Relativistic Jet Dichotomy and the End of the Blazar Sequence" - Friday 04 December 2020 - Casadio Carolina
"An excess of small-scale gravitational lenses observed in galaxy clusters" - Friday 20 November 2020 - Tsouros Alexandros
"A bright millisecond-duration radio burst from a Galactic magnetar"
Presentation: [PDF file] - Friday 13 November 2020 - Romanopoulos Stylianos
"Evidence for a Supergalactic Structure of Magnetic Deflection Multiplets of Ultra-High Energy Cosmic Rays" - Friday 06 November 2020 - Mandarakas Nikolaos
- "The use of light polarization in weak-lensing inversions"
Presentation: [PDF file] - Friday 30 October 2020 - Kyritsis Elias
"PS1-STRM: Neural network source classification and photometric redshift catalogue for PS1 3π DR1"
Presentation: [PDF file] - Friday 23 October 2020 - Kypriotakis Ioannis
"The WALOPNorth Instrument".
Presentation: [PDF file] - Friday 16 October 2020 - Kovlakas Konstantinos
"Formation of GW190521 via gas accretion onto population III stellar black hole remnants born in high-redshift minihalos"
Presentation: [PDF file] - Friday 09 October 2020 - Kouroumpatzakis Konstantinos
"An uncertainty principle for star formation - III. The characteristic emission time-scales of star formation rate tracers" - Friday 02 October 2020 - Korkidis Georgios
"On the Mass Distribution of the Intra-Cluster Light in Galaxy Groups and Clusters"
Presentation: [PDF file] - Friday 25 September 2020 - Kopsacheili Maria
"First 3D Morpho-Kinematic model of Supernova Remnants. The case of VRO 42.05.01 (G 166.0+4.3)"
Presentation: [PDF file] - Friday 18 September 2020 - Raphael Skalidis
"H I filaments are cold and associated with dark molecular gas. HI4PI-based estimates of the local diffuse CO-dark H2 distribution"
Presentation: [PDF file] - Thursday 11 June 2020 - Elias Kyritsis
"Identifying new X-ray binary candidates in M31 using random forest classification"
Presentation: [PDF file] - Friday 5 June 2020 - Vincent Pelgrims
"A Galactic - scale gas wave in the solar neighbourhood" - Friday 29 May 2020 - Kouroumpatzakis Kostantinos
"Connecting the metallicity dependence and redshift evolution of high-mass X-ray binaries" - Friday 15 May 2020 - Casadio Carolina
"A transition from parabolic to conical shape as a common effect in nearby AGN jets"
Presentation: [PDF file] - Friday 8 May 2020 - Gkimisi Katia
"Eliminating artefacts in polarimetric images using deep learning"
Presentation: [PDF file] - Friday 10 April 2020 - Stylianos Romanopoulos
"Depth of maximun of air-shower profiles at the Pierre Auger Observatory. I. Measurements at energies above 1017,8 eV."
Presentation: [PDF file] - Friday 6 Mar 2020 - Ioannis Kypriotakis
"Assessment of astronomical images using combined machine learning models" - Friday 28 Feb 2020 - Sebastian Kiehlmann
"Dissecting the regions around IceCube high-energy neutrinos: growing evidence for the blazar connection" - Friday 21 Feb 2020 - George Korkidis
"Early - type Host Galaxies of Type Ia Supernovae. II. Evidence for Luminosity Evolution in Supernova Cosmology" - Friday 14 Feb. 2020 - Nikos Mandarakas
"Origin of a massive hyper-runaway subgiant star LAMOST-HVS1 – implication from Gaia and follow-up spectroscopy"
Presentation: [PDF file] - Friday 7 Feb. 2020 - Raphael Skalidis
"Mapping the Magnetic Interstellar Medium in Three Dimensions over the Full Sky with Neutral Hydrogen" - Friday 17 Jan. 2020 - Dmitry Blinov
"The vanishing and appearing sources during a century of observations project: I. USNO objects missing in modern sky surveys and follow-up observations of a "missing star" - Friday 20 Dec. 2019 - Konstantinos Kovlakas
"First results from the TNG50 simulation: the evolution of stellar and gaseous discs across cosmic time"
Presentation: [PDF file] - Friday 13 Dec. 2019 - Maria Kopsacheili
"A wide star–black-hole binary system from radial-velocity measurements"
Presentation: [PDF file] - Friday 6 Dec. 2019 - Theo Tsantirakis
"A 40-billion solar mass black hole in the extreme core of Holm 15A, the central galaxy of Abell 85"
Presentation: [PDF file]