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 Elias Kyritsis, or Maria Sánchez-García to lead a discussion. The schedule for the coming weeks follows:
- 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
"A pulsar-helium star compact binary system formed by common envelope evolution" - 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]