جست‌وجوی استاد و پژوهشگر

Nikolai Piskunovمشاهده پروفایل

استاد

• Astronomy
• Astrophysics
• Stellar Spectroscopy
• +۵ مورد دیگر

Nikolai Piskunov is a Professor in the Department of Physics and Astronomy at Uppsala University, Sweden, specializing in high-resolution spectroscopy applications for stellar and exoplanetary research. His work bridges observational astronomy, theoretical modeling, and instrument development. His primary research interests include: Stellar spectroscopy and atmospheric analysis Exoplanet detection and characterization Stellar magnetic field mapping and analysis Doppler imaging techniques for stellar surface mapping Development of spectroscopic instrumentation and data analysis methods Chemical abundance studies of various stellar types Professor Piskunov's recent publications reveal a strong focus on cutting-edge research using instruments like CRIRES+ on the Very Large Telescope. His work spans from detailed studies of stellar magnetic fields in chemically peculiar stars to groundbreaking analyses of exoplanet atmospheres, particularly ultra-hot Jupiters. His research group has made significant contributions to understanding atmospheric dynamics, chemical compositions, and temperature structures in both stellar and planetary systems. He has developed or contributed to several important software tools for astronomical spectroscopy, including the widely used Spectroscopy Made Easy (SME) package and its Python implementation PySME. His work on optimal extraction of echelle spectra has significantly improved data reduction methodologies in the field. Professor Piskunov maintains extensive international collaborations across Europe and has contributed to major instrumentation projects including CRIRES+ and future instruments for the Extremely Large Telescope. His research continues to evolve with current trends in astronomy, particularly in the rapidly developing field of exoplanet characterization where high-resolution spectroscopy provides unprecedented insights.

• Exoplanet formation
• Exoplanet composition
• Exoplanet detection
• +۵ مورد دیگر

Dr. Ian J. M. Crossfield is an Associate Professor of Physics and Astronomy at the University of Kansas, where he leads the KU ExoLab research group dedicated to the discovery and characterization of nearby planetary systems. His research spans exoplanet formation, composition, detection, and characterization, with a focus on developing instrumentation to advance these pursuits. Dr. Crossfield's research interests center on exoplanetary science, particularly the atmospheric composition and physical properties of exoplanets. His recent work includes mapping sulfur dioxide (SO2) in gas giant exoplanets using photochemical models, leading the OrCAS survey to measure masses of sub-Neptune exoplanets, and studying exoplanet atmospheres using both ground-based and space-based observations. His expertise spans photometry and high-resolution spectroscopy across multiple observatories. His recent publications reveal a strong focus on exoplanet atmospheric characterization, with particular attention to transmission spectroscopy, thermal emission measurements, and photochemical modeling. His work often involves multi-wavelength observations and combines theoretical modeling with observational data from facilities like JWST, Spitzer, and ground-based telescopes. Chair of NASA Exoplanet Program Analysis Group (ExoPAG) Executive Committee (2025) Dr. Crossfield has successfully mentored numerous students, including postdocs, PhD candidates, and undergraduates, several of whom have received prestigious awards like the NSF GRFP. His research group collaborates with institutions worldwide and utilizes advanced instrumentation for exoplanet detection and characterization. The KU ExoLab is actively involved in several major observational campaigns, including the OrCAS survey which involves 10 institutions using Keck/KPF and WIYN/NEID spectrographs.