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Mariangela BernardiView profile

Professor

• Galaxies
• Super-massive black holes
• Observational Cosmology
• +6 more

Mariangela Bernardi is a Professor in the Department of Physics and Astronomy at the University of Pennsylvania, affiliated with the College of Arts & Sciences. She has held academic ranks from Assistant Professor (2005-2010) to Associate (2010-2020) and currently as Full Professor since 2020. Her research focuses on galaxy properties, super-massive black holes, and observational cosmology. She is a core contributor to the Sloan Digital Sky Survey (SDSS) and pioneered the use of deep learning for galaxy morphology analysis. Notable contributions include the UPenn SDSS PhotDec Catalog and identifying biases in black hole catalogs. Education Ph.D. in Astrophysics, Ludwig-Maximilians-Universität, Munich (1999) Laurea in Physics, Università di Padova, Italy (1995) Research Interests Galaxy formation/evolution Black hole-galaxy co-evolution Large-scale structures and peculiar motions Deep learning applications in astrophysics Her work demonstrates major dry mergers in massive galaxies and resolves discrepancies in dynamical mass estimates. She has produced two Value-Added Catalogs for SDSS-IV and identified critical biases in black hole mass catalogs impacting gravitational wave studies. Grants/Advising Supervised multiple research projects and teams, leading to over 130 publications (29,000+ citations, h-index 65). Active in SDSS collaborations and institutional service roles. Labs/Teams Leads the UPenn astrophysics group focused on galaxy surveys and computational astrophysics.

Juan Hernandez SantistebanView profile

Lecturer

• Astrophysics
• Active Galactic Nuclei
• Reverberation Mapping
• +2 more

Juan Hernandez Santisteban is a Lecturer in the School of Physics and Astronomy at the University of St Andrews. His research investigates accreting compact objects including white dwarfs, neutron stars, and supermassive black holes using multi-wavelength observational techniques. As Principal Investigator of the Las Cumbres Observatory Key Project, he leads reverberation mapping experiments of Active Galactic Nuclei, employing a global telescope network to study material dynamics near supermassive black holes. His work also includes instrumentation development through the OPTICam science team.

W. Niel BrandtView profile

Professor

• Supermassive Black Holes
• Active Galactic Nuclei
• Cosmic Surveys
• +5 more

W. Niel Brandt is the Eberly Family Chair Professor of Astronomy and Astrophysics and Professor of Physics at The Pennsylvania State University. He holds dual faculty appointments in the Department of Astronomy and Astrophysics and the Department of Physics within the Eberly College of Science. His research focuses on observational studies of supermassive black holes (SMBHs), cosmic surveys, and high-energy astrophysics, leveraging data from missions like Chandra, XMM-Newton, and NuSTAR. He is actively involved in upcoming projects such as the Legacy Survey of Space and Time (LSST) and the MOONS spectrograph. Education: Ph.D., Astronomy, University of Cambridge, United Kingdom (1996) B.S., Honors Physics, California Institute of Technology (1992) Smithsonian Postdoctoral Fellow, Harvard-Smithsonian Center for Astrophysics (1996–1997) Research Interests: Deep multiwavelength surveys of cosmic structures Growth and evolution of SMBHs across cosmic time Black hole-galaxy co-evolution X-ray astronomy and high-energy phenomena Transient sources and AGN feedback mechanisms Publications and Impact: Brandt has authored/co-authored over 610 refereed publications, cited over 67,000 times. His recent work emphasizes SMBH demographics, AGN host galaxy interactions, and multi-mission survey analyses. His 2024 studies include breakthroughs in protocluster BH growth and dust-obscured galaxy characterization. Awards and Recognition: American Astronomical Society Fellowship (2020) AAAS Fellowship (2019) Bruno Rossi Prize (2016) Newton Lacy Pierce Prize (2004) Teaching and Mentorship: Teaches courses on high-energy astrophysics and black holes. Supervised 28 postdocs, 24 graduate students, and 17 undergraduates. Lead instructor for Penn State’s inservice astronomy workshops since 2000. Collaborations and Leadership: Co-Chair of the LSST AGN Science Collaboration, member of the LSST Science Advisory Committee, and active in international conference organizing. His group uses advanced tools like COCO, WebPIMMS, and SuperMongo for data analysis.

• Gamma-Ray Astronomy
• High Energy Astrophysics
• Cherenkov Telescopes
• +3 more

Markus Gaug is a Professor in the Department of Physics at Universitat Autònoma de Barcelona (UAB), affiliated with the Centre for Space Studies and Research (CEREs). He specializes in high-energy astrophysics, particularly gamma-ray astronomy using Cherenkov telescopes like MAGIC and the upcoming Cherenkov Telescope Array (CTA). His research focuses on blazars, intergalactic magnetic fields, and atmospheric characterization for precise telescope calibration. Gaug has led or co-led major projects such as the CTA-North Gamma-Ray Astronomy project and contributed to the design of the CTA's atmospheric calibration systems using LIDAR technology. His work combines observational data from multiwavelength campaigns with advanced modeling techniques to study transient astrophysical phenomena and fundamental physics questions like quantum gravity. Gaug has authored over 300 publications, including groundbreaking studies on blazar variability and intergalactic magnetic field constraints. He collaborates globally with institutions like CTA, Fermi-LAT, and IceCube, and has pioneered LIDAR-based atmospheric monitoring at observatories like La Palma. Notable contributions include the first detection of VHE gamma rays from supernova remnants and the development of open-source tools for CTA data analysis. Gaug’s research also addresses technical challenges in telescope instrumentation and environmental impacts on observational facilities.

Yasaman HomayouniView profile

Research Fellow

• Active Galactic Nuclei
• Reverberation Mapping
• Black Hole Physics
• +3 more

Yasaman Homayouni is a Postdoctoral Scholar in the Department of Astronomy and Astrophysics at The Pennsylvania State University. Her research centers on active galactic nuclei (AGNs) and supermassive black holes, utilizing reverberation mapping techniques to probe physical distances and kinematics in quasars. Her primary research interests include: Reverberation mapping of AGNs Velocity-resolved reverberation mapping to model the broad-line region Multi-wavelength campaigns (e.g., AGN STORM 2) Black hole mass measurements via SDSS-RM and Black Hole Mapper programs Dr. Homayouni is actively involved in several major collaborations: AGN STORM 2: an intensive campaign on Mrk 817 using multi-wavelength observations SDSS-RM and Black Hole Mapper: programs for studying supermassive black holes in quasars LSST AGN Science Collaboration: focusing on AGN identification and variability with the Legacy Survey of Space and Time No scientific awards were mentioned in the provided text. No students or advisees are listed in the provided text. Her research is supported through participation in large collaborative projects. She works within international telescope campaigns and data analysis teams associated with the mentioned projects, contributing to black hole physics and galaxy evolution research.

• Black Holes
• Active Galactic Nuclei
• Quasars
• +4 more

Christopher Onken is a Research Fellow at the Research School of Astronomy & Astrophysics of the Australian National University, serving as Deputy Director of Siding Spring Observatory. His work focuses on observational astrophysics, particularly black holes, active galactic nuclei (AGN), and transient phenomena. Role : Deputy Director, Siding Spring Observatory Key Collaborations : SkyMapper Southern Survey, ATLAS (Asteroid Terrestrial-impact Last Alert System), LIGO/Virgo/KAGRA gravitational wave followup His research explores black hole accretion , AGN variability , and transient events through photometric and spectroscopic surveys of the southern sky. Recent projects include data releases from SkyMapper and optical followup of gravitational wave counterparts. Current trends in his publications emphasize massive black hole dynamics , changing-look AGN , and gravitational wave astronomy , leveraging facilities like ANU's 2.3m telescope and collaborations with international teams. Email : christopher.onken@anu.edu.au

• Gamma Radiation
• Blazars
• X Ray Physics
• +7 more

Jenni Jormanainen is a Visiting Professor in the Department of Electronics and Nanoengineering at Aalto University's School of Electrical Engineering, where she works with the Anne Lähteenmäki Group. Her research focuses on high-energy astrophysics, particularly the study of blazars and active galactic nuclei through multiwavelength observations. Her research interests center on blazar physics , gamma-ray astronomy , and polarimetry . Dr. Jormanainen specializes in analyzing multiwavelength data across radio, optical, X-ray, and gamma-ray bands to understand the emission mechanisms and jet physics of relativistic objects. Her work particularly emphasizes polarization measurements, spectral energy distributions, and the connection between neutrino emission and electromagnetic counterparts in blazar sources. Analysis of her 21 publications shows a strong trend toward multi-messenger astronomy , with increasing focus on neutrino source candidates and their electromagnetic counterparts. Her recent work (2024-2025) demonstrates sophisticated modeling of blazar emission mechanisms, particularly investigating Compton scattering processes, leptohadronic models, and the relationship between optical polarization and high-energy emission. Active participant in major international collaborations including MAGIC, VERITAS, and Fermi Large Area Telescope Extensive work on blazar Markarian 421, BL Lacertae objects, and OJ 287 Research featured in 19 news outlets with significant social media attention Publications have received attention from 40+ X users and 7 Bluesky users Dr. Jormanainen collaborates extensively with international research teams across multiple institutions, contributing to large-scale observational campaigns that combine data from ground-based telescopes and space observatories. Her work often involves coordinating observations across different wavelength regimes to build comprehensive models of blazar behavior during flaring states and quiescent periods.

Anne LähteenmäkiView profile

Associate Professor

• Active Galactic Nuclei
• Blazars
• Radio Astronomy
• +7 more

Anne Lähteenmäki is an Associate Professor at the Department of Electronics and Nanoengineering, School of Electrical Engineering, Aalto University, where she leads research at the Metsähovi Radio Observatory. Her work centers on active galactic nuclei (AGN), particularly blazars and narrow-line Seyfert 1 galaxies, using multi-frequency observations from radio to TeV energies. Doctoral Degree in Engineering and Technology, Helsinki University of Technology (1999) Master’s Degree in Natural Sciences, University of Turku (1995) Her research focuses on the physics of relativistic jets, AGN evolution, and the triggering mechanisms in jet formation. She conducts high-frequency radio observations using the 14-meter Metsähovi Radio Observatory antenna and participates in international multiwavelength campaigns. Her work integrates observational data across the electromagnetic spectrum to model AGN behavior and understand jet dynamics. The recent publications (2021–2025) reflect a strong focus on blazar variability, gamma-ray flares, neutrino source candidates, and the broadband modeling of transitional blazars. These studies often involve collaborations with major observatories and consortia such as the Fermi Large Area Telescope, MAGIC, VERITAS, and VLBI networks. The research spans subfields including spectral energy distribution modeling, leptohadronic processes, and long-term radio monitoring at 37 GHz. She was awarded the Gruber Cosmology Prize in 2018 for her contributions to cosmology through AGN research. Supervised 4 theses Active participant in over 100 academic activities, including conference presentations and committee memberships (e.g., IAU, COSPAR, ESO workshops) Member of international collaborations including Fermi-LAT, MAGIC, and VERITAS Featured in multiple press and media outlets for discoveries related to black hole binaries and blazar outbursts She leads the Anne Lähteenmäki Group at Metsähovi, contributing to one of the longest-running radio monitoring programs of AGNs, providing critical data for time-domain astrophysics and multi-messenger campaigns.

Aaron RoodmanView profile

Professor

• Observational Cosmology
• Dark Energy
• Large Optical Telescope Surveys
• +5 more

Aaron Roodman is a Professor of Particle Physics and Astrophysics at Stanford's SLAC National Accelerator Laboratory, where he serves as the leader of the LSST Camera program and Deputy Director of the Rubin Observatory for construction. His research bridges experimental particle physics and observational cosmology, with significant contributions to understanding Dark Energy through large-scale astronomical surveys. Dr. Roodman received his B.S. with Honors in Physics from the California Institute of Technology in 1985 and his Ph.D. in Physics from the University of Chicago in 1991. His early career focused on experimental particle physics, studying differences between Matter and antiMatter for two decades before transitioning to astrophysics and cosmology. Roodman's research primarily centers on observational cosmology, with a focus on Dark Energy studies using data from large optical telescope surveys like the Dark Energy Survey. He has played a major role in the construction of the LSST Camera, the world's largest digital camera, for the Vera C. Rubin Observatory. His work combines advanced instrumentation development with cosmological analysis to probe fundamental questions about the universe's expansion and structure. His recent publications demonstrate a strong focus on large-scale cosmological surveys, particularly the Dark Energy Survey and the upcoming Legacy Survey of Space and Time (LSST). His research spans instrumental development for astronomical cameras, data analysis techniques for cosmological parameter estimation, and applications of machine learning to gravitational lensing and supernova cosmology. Fellow, American Physical Society, Division of Particles & Fields (2012) Professor Roodman actively mentors the next generation of scientists, serving as Doctoral Dissertation Advisor for Sydney Erickson and Theo Schutt, Doctoral Dissertation Reader for Sidney Mau and Guillem Megias i Homar, and Postdoctoral Research Mentor for Rebecca Chen. He has held significant leadership roles including Department Chair of Particle Physics & Astrophysics from 2015 to 2020. He leads major collaborative efforts including the LSST Camera program and is deeply involved with the Dark Energy Survey and Vera C. Rubin Observatory projects. His work brings together large international teams of scientists and engineers to advance our understanding of fundamental cosmic phenomena through cutting-edge observational techniques.

• Astrophysics
• Cosmology
• Gamma-ray bursts
• +5 more

Joonas Kari Markku Viuho is a Research Fellow at the University of Copenhagen , affiliated with the Niels Bohr Institute and specifically the Cosmic Dawn Center (DAWN) . His research is centered on astrophysics, observational cosmology, and high-energy transient phenomena. University: University of Copenhagen School: Niels Bohr Institute Department: Cosmic Dawn Center (DAWN) Email: joonas.viuho@nbi.ku.dk His research interests include: Gamma-ray bursts and their environmental contexts Lyman-alpha absorber systems Near-infrared airglow modeling Multi-wavelength transient detection His publications over the last five years reveal a strong focus on: Gamma-ray burst follow-up observations Instrumentation for infrared spectroscopy Blazar flaring activity in gamma-ray sources Astrophysical false positives (e.g., dormant black hole misidentifications) He actively collaborates through networks in: Multi-messenger astronomy International GRB observation campaigns Cosmic Dawn-related research

Richard McMahonView profile

Professor

• Observational Astronomy
• Galaxy Formation and Evolution
• Supermassive Black Holes
• +7 more

Professor Richard McMahon is affiliated with the Institute of Astronomy at the University of Cambridge and holds the academic rank of Professor of Astronomy . His career spans over 25 years of leadership in data-intensive multi-wavelength surveys. Education : PhD in Astronomy (Cambridge), Postgraduate Certificate in Secondary Education (Cambridge), BSc in Physics (Queen's University Belfast). McMahon's research focuses on supermassive black holes , galaxy evolution , and the accelerating expansion of the Universe . He pioneered the use of quasars to study hydrogen content and star formation rates in the early Universe, utilizing projects like the VISTA Hemisphere Survey (VHS) and Dark Energy Survey (DES) . His work involves machine learning , supervised learning , and multi-dimensional data visualization for analyzing petascale datasets. He leads the DiRAC Data Intensive HPC Service and co-directs the AIRR Dawn Project , focusing on AI-driven cosmological research. Scientific Awards : 2015 Breakthrough Prize in Fundamental Physics 2007 Gruber Cosmology Prize 2001 Clarivate Highly Cited Researcher McMahon has held significant roles, including Director and Head of the Institute of Astronomy (2017–2022), and currently chairs the University Research Computing Advisory Board . His collaborations span institutions like ESO , ESA , and STFC .

Vahe PetrosianView profile

Professor

• Theoretical Astrophysics
• Cosmology
• High-Energy Astrophysics
• +4 more

Vahe Petrosian is a Professor of Physics and Applied Physics at Stanford University , where he has held appointments since 1980. His career spans decades of research in theoretical astrophysics and cosmology , with a focus on high-energy astrophysical processes and particle acceleration in cosmic environments. Research interests include the evolution of the universe at high redshifts , gravitational lensing for mass measurement, and non-thermal radiation from diverse sources like gamma-ray bursts , solar flares , and clusters of galaxies . His methodological work with Prof. B. Efron on statistical techniques in astrophysics has been pivotal. Recent publications emphasize gamma-ray bursts as cosmological tools, machine learning for redshift inference, and synchrotron radiation from cosmic rays. These works span Astrophysical Journal and Proceedings of Science , reflecting his expertise in high-energy astronomy and cosmic ray dynamics . Scientific Awards: Foreign Member, Armenian National Academy of Science (2008) Iranian National Fellowship (1958-1962) Industrial Fellowship, Cornell University (1963-1964) Alfred P. Sloan Foundation Fellowship (1972-1974) He advises numerous doctoral students and has held leadership roles in international collaborations, including advisory positions at NOAO and Space Telescope Science Institute . His contributions to plasma physics and radiative processes remain foundational.

• Black Holes
• Accretion Processes
• X-ray Astronomy
• +3 more

Christine Done is a Professor in the Department of Physics at the University of Durham, specializing in high-energy astrophysics. She earned her PhD from the University of Cambridge, followed by an NRC fellowship at NASA/Goddard Space Flight Center and senior research fellowships in the UK. She joined Durham in 2000 and was promoted to full Professor in 2006. She holds a Visiting Professor position at the Kavli Institute for Physics and Mathematics of the Universe (University of Tokyo) and chairs Science Working Groups for the XRISM and Athena X-ray missions. Her research explores black hole accretion processes, X-ray emissions from galactic and supermassive black holes, and relativistic environments. Key interests include radiation mechanisms in extreme gravity, accretion disk dynamics, and AGN/quasar variability. She utilizes space-based observatories like XRISM, IXPE, and Suzaku to study phenomena inaccessible from Earth. Her publications focus on X-ray spectroscopy, accretion disk instabilities, AGN winds, and black hole spin measurements. Recent work emphasizes polarization studies, disk-corona interactions, and multi-wavelength correlations in quasars. She has contributed to understanding thermal winds in X-ray binaries and developed models for AGN variability and feedback. Awards & Honors: Royal Astronomical Society George Darwin Lectureship (2019) Stephen Murray Distinguished Visitor Program, Harvard (2018) She teaches Special Relativity, Quantum Mechanics, and General Relativity at Durham. She directs research initiatives and advises on international space missions, including XRISM and Athena. Her lab collaborations span NASA, JAXA, and ESA projects, focusing on next-generation X-ray telescopes.

• Astrophysics
• Active Galactic Nuclei (AGN)
• Accretion Discs
• +5 more

Hermine Landt-Wilman is a researcher at Durham University specializing in astrophysics, particularly in the study of active galactic nuclei (AGN), accretion discs, and X-ray astronomy. She has contributed to major projects like AGN STORM 2 and the SOUX AGN sample, focusing on understanding AGN structure, variability, and dust morphology. Key research areas: Accretion disc dynamics, AGN winds, X-ray absorption, UV spectroscopy Collaborations: NASA/ESA Hubble Space Telescope, NICER satellite, Swift observatory Recent work: Multi-wavelength studies of Mrk 817 and NGC 5548, dust reverberation mapping Her publications from 2021-2025 demonstrate expertise in reverberation mapping, photoionization modeling, and spectral analysis of AGN, with a focus on interband delays and obscured states. She frequently collaborates with international teams on AGN structure and evolution.

• General Relativity
• Relativistic Astrophysics
• Cosmology
• +3 more

Valery Zhdanov is Professor and Head of the Astrophysics Department at the Astronomical Observatory of Taras Shevchenko National University of Kyiv, Ukraine, a position he has held since 1997. He is a leading researcher in General Relativity, Relativistic Astrophysics, and Cosmology, with significant contributions to understanding dark matter and dark energy phenomena. His academic credentials include postgraduate studies (1972), Ph.D. in Physical and Mathematical Sciences (1974), Doctor of Physics and Mathematics (1992), and Professorship in Astrophysics and Radioastronomy (2006), all from Taras Shevchenko National University. Zhdanov's research spans relativistic dynamics, gravitational microlensing, and cosmological modeling. He developed foundational methods for two-body problems in relativity, relativistic shock waves, and observational signatures of dark matter and dark energy. Current work focuses on detecting manifestations of these components, which constitute 95% of the universe's mass-energy density. Analysis of his 2010-2020 publications reveals consistent emphasis on scalar field cosmology for dark energy modeling, gravitational microlensing techniques to probe dark matter clumps, and multi-wavelength studies of active galactic nuclei. His work bridges theoretical frameworks with observational data from quasars, megamasers, and large-scale structure surveys. His honors include: Winner of the State prize of Ukraine in Science and Technology (2014) As department head, Zhdanov leads research initiatives targeting observational evidence for dark matter and dark energy through gravitational lensing and AGN studies. Future projects prioritize identifying concrete signatures of these elusive components using advanced microlensing analyses and cosmological simulations.