Nikolai Piskunov

Publikationer

Senaste publikationer

• Optimising spectroscopic observations of transiting exoplanets (2024)
• Continuous ultraviolet to blue-green astrocomb (2024)
• Exploring the ultra-hot Jupiter WASP-178b (2024)
• A conclusive non-detection of magnetic field in the Am star o Peg with high-precision near-infrared spectroscopy (2024)
• Secular stability of surface abundance structures in the rapidly rotating Ap star 56 Ari (2024)

Alla publikationer

Artiklar

• Optimising spectroscopic observations of transiting exoplanets (2024)
• Continuous ultraviolet to blue-green astrocomb (2024)
• Exploring the ultra-hot Jupiter WASP-178b (2024)
• A conclusive non-detection of magnetic field in the Am star o Peg with high-precision near-infrared spectroscopy (2024)
• Secular stability of surface abundance structures in the rapidly rotating Ap star 56 Ari (2024)
• The mean longitudinal magnetic field and its uses in radial-velocity surveys (2024)
• CRIRES+ on sky at the ESO Very Large Telescope (2023)
• Determination of small-scale magnetic fields on Sun-like stars in the near-infrared using CRIRES+ (2023)
• Retrieval of the dayside atmosphere of WASP-43b with CRIRES⁺ (2023)
• Doppler imaging of a southern ApSi star HD 152564 (2023)
• PySME (2023)
• CRIRES+ detection of CO emissions lines and temperature inversions on the dayside of WASP-18b and WASP-76b (2023)
• Using Molecular Lines to Determine Carbon and Nitrogen Abundances in the Atmospheres of Cool Stars (2022)
• CRIRES+ detection of H₂O and CO in the transmission spectra of WASP-107 b (2022)
• Accurate Short-Characteristics Radiative Transfer in A Numerical Tool for Astrophysical RESearch (ANTARES) (2021)
• Evolution of brightness and magnetic features of young solar-type stars - I. The young G star HIP 89829 (2021)
• Optimal extraction of echelle spectra (2021)
• A Decade with VAMDC (2020)
• Model-free inverse method for transit imaging of stellar surfaces (2019)
• Spot evolution on LQ Hya from 2006-2017 (2019)
• Starspot activity of HD199178 Doppler images from 1994-2017 (2019)
• Hyperfine Splitting in the VALD Database of Spectral-line Parameters (2019)
• Evaluation of the Recent Atomic Data for Fe i Lines Based on Solar and Stellar Spectra (2019)
• Long-term spot monitoring of the young solar analogue V889 Herculis (2019)
• Model-independent Exoplanet Transit Spectroscopy (2018)
• Inside a VAMDC data node-putting standards into practical software (2018)
• VALD (2018)
• Spectroscopy Made Easy (2017)
• Scientific problems addressed by the Spektr-UV space project (world space Observatory-Ultraviolet) (2016)
• Spectral Properties Of Cool Stars (2016)
• The virtual atomic and molecular data centre (VAMDC) consortium (2016)
• Accuracy of atmospheric parameters of FGK dwarfs determined by spectrum fitting (2016)
• Using near-infrared spectroscopy for characterization of transiting exoplanets (2015)
• Accurate Gravities of F, G, and K Stars from High Resolution Spectra Without External Constraints (2015)
• Serendipitous Discovery of a Dwarf Nova in the Kepler Field Near the G Dwarf Kic 5438845 (2015)
• Doppler imaging of LQ Hydrae for 1998-2002 (2015)
• Magnetic field topology and chemical spot distributions in the extreme Ap star HD 75049 (2015)
• Stellar activity as noise in exoplanet detection - I. Methods and application to solar-like stars and activity cycles (2015)
• Three-dimensional magnetic and abundance mapping of the cool Ap star HD 24712 II. Two-dimensional magnetic Doppler imaging in all four Stokes parameters (2015)
• A major upgrade of the VALD database (2015)
• The EChO science case (2015)
• Doppler images of DI Piscium during 2004-2006 (2014)
• Exploring the magnetic field complexity in M dwarfs at the boundary to full convection (2014)
• Magnetically Controlled Accretion on the Classical T Tauri Stars GQ Lupi and TW Hydrae (2013)
• Are there tangled magnetic fields on HgMn stars? (2013)
• Radial velocity signatures of Zeeman broadening (2013)
• Delo-bezier formal solutions of the polarized radiative transfer equation (2013)
• Three-dimensional magnetic and abundance mapping of the cool Ap star HD 24712 (2013)
• M2K. II. A Triple-Planet System Orbiting Hip 57274 (2012)
• Doppler images of II Pegasi for 2004-2010 (2012)
• Magnetism, chemical spots, and stratification in the HgMn star ϕ Phoenicis (2012)
• Multi-element Doppler imaging of the CP2 star HD 3980 (2012)
• M-dwarf metallicities (2012)
• Spot activity of II Peg (2011)
• THE NASA-UC ETA-EARTH PROGRAM. III. A SUPER-EARTH ORBITING HD 97658 AND A NEPTUNE-MASS PLANET ORBITING G1 785 (2011)
• The NASA-UC Eia-earth program. II. a planet orbiting HD 156668 with a minimum mass of four earth masses (2011)
• No magnetic field in the spotted HgMn star mu Leporis (2011)
• First detection of linear polarization in the line profiles of active cool stars (2011)
• Analyzing low signal-to-noise FUSE spectra Confirmation of Lyman continuum escape from Haro 11 (2011)
• Analyzing low signal-to-noise FUSE spectra (2011)
• Doppler images of the RS CVn binary II Pegasi during the years 1994-2002 (2011)
• Chemical spots in the absence of magnetic field in the binary HgMn star 66 Eridani (2011)
• The search for magnetic fields in mercury-manganese stars (2011)
• HARPSpol - The New Polarimetric Mode for HARPS (2011)
• Rotation, magnetism and metallicity of M dwarf systems (2011)
• The Exoplanet Orbit Database (2011)
• Time-resolved photometric and spectroscopic analysis of the luminous Ap star HD 103498 (2010)
• Least-squares deconvolution of the stellar intensity and polarization spectra (2010)
• Surface structure of the CoRoT CP2 target star HD50773 (2010)
• Magnetic Doppler imaging of the roAp star HD 24712 (2010)
• Modelling the molecular Zeeman-effect in M-dwarfs (2010)
• THE NASA-UC ETA-EARTH PROGRAM (2009)
• Detection of dusty plasma near the E-ring of Saturn (2009)
• VALD — an atomic and molecular database for astrophysics (2008)
• A comparative analysis of the laboratory and theoretical transition probabilities of the Fe-peak elements for a new release of VALD (2008)
• Weather in stellar atmosphere revealed by the dynamics of mercury clouds in alpha Andromedae (2007)
• Atomic Diffusion and Mixing in Old Stars (2007)
• A probable stellar solution to the cosmological lithium discrepancy (2006)
• New Abundances for Old Stars – Atomic Diffusion at Work in NGC 6397 (2006)
• Inhomogeneous distribution of mercury on the surfaces of rapidly rotating HgMn stars (2005)
• He and Si surface inhomogeneities of four Bp variable stars (2004)
• Magnetic Doppler imaging of 53 Camelopardalis in all four Stokes parameters (2004)
• Multi-element abundance Doppler imaging of the rapidly oscillating Ap star HR 3831 (2004)
• No magnetic field variation with pulsation phase in the roAp star gamma Equulei (2004)
• Near-Polar Starspots and Polar Dynamo Waves (2004)
• The influence of magnetic fields on the hydrostatic structure of the atmospheres of chemically peculiar stars (2004)
• Doppler Imaging of the Ap star epsilon Ursae Majoris: Ca, Cr, Fe, Mg, Mn, Ti, Sr (2003)
• The Photosphere and Veiling Spectrum of T Tauri Stars (2003)
• PEPSI spectro-polarimeter for the LBT (2003)
• Detailed analysis of Balmer lines in cool dwarf stars (2002)
• Doppler Imaging of stellar magnetic fields. II. Numerical experiments (2002)
• Doppler Imaging of stellar magnetic fields. III. Abundance distribution and magnetic field geometry of alpha 2 CVn (2002)
• Nonaxisymmetric cool spot distributions and dynamo action in close binaries (2002)
• Spectropolarimetry of starspots (2002)
• Doppler Imaging of stellar magnetic fields. I. Techniques (2002)
• New algorithms for reducing cross-dispersed echelle spectra (2002)
• Abundance stratification and pulsation in the atmosphere of the roAp star gamma Equulei (2002)
• Swing excitation and magnetic activity in close binary systems (2002)
• Spectroscopy of T Tauri stars with UVES. Observations and analysis of RU Lup (2002)
• The core-wing anomaly of cool Ap stars - Abnormal Balmer profiles (2001)
• Formation of Fe x-Fe XIV coronal lines in the accretion shock of T Tauri stars (2001)
• Model atmospheres with individualized abundances (2001)
• LTE spectrum synthesis in magnetic stellar atmospheres - The interagreement of three independent polarised radiative transfer codes (2001)
• A list of data for the broadening of metallic lines by neutral hydrogen collisions (2000)
• Self-broadening in Balmer line wing formation in stellar atmospheres (2000)
• Self broadening of hydrogen lines: initial results (2000)
• The Three-dimensional Structure of the Warm Local Interstellar Medium. I. Methodology (2000)
• VALD-2 (1999)
• Multi element Doppler imaging of Ap stars I. He, Mg, Si, Cr and Fe surface distribution for CU Virginis (1999)
• The Vienna Atomic Line Data Base - a status report (1999)
• Eu III identification and Eu abundance in CP stars (1999)
• Spectral synthesis of TiO lines (1998)
• Local interstellar medium properties and deuterium abundances for the lines of sight toward HR 1099, 31 Comae, beta Ceti, and beta Cassiopeiae (1997)
• Spectroscopy made easy: A new tool for fitting observations with synthetic spectra (1996)

Böcker

• Modelling of Stellar Atmospheres (2003)

Konferenser

• End-to-End simulation framework for astronomical spectrographs (2024)
• CRIRES+ (2022)
• CRIRES+ on sky (2022)
• ELT-HIRES, the high resolution spectrograph for the ELT (2020)
• Full System Test and early Preliminary Acceptance Europe results for CRIRES (2018)
• Analysis of the polarimetric performance of the HARPS3 Cassegrain adaptor unit (2018)
• ELT-HIRES, the high resolution spectrograph for the ELT (2018)
• A unique infrared spectropolarimetric unit for CRIRES+ (2018)
• VALD3 (2017)
• Main High-Resolution Near-IR Spectrometer for the VLT (2017)
• Deriving stellar parameters with the SME software package (2017)
• Program Package for the Analysis of High Resolution High Signal-To-Noise Stellar Spectra (2017)
• 4MOST (2016)
• The " plus " for CRIRES (2016)
• Characterizing the cross dispersion reflection gratings of CRIRES (2016)
• EELT-HIRES the high-resolution spectrograph for the E-ELT (2016)
• HARS3 for a Roboticized Isaac Newton Telescope (2016)
• On the Accuracy of Atmospheric Parameter Determination in BAFGK Stars (2015)
• CRIRES plus (2014)
• Novel infrared polarimeter for the ESO CRIRES plus instrument (2014)
• Concept and optical design of the cross-disperser module for CRIRES+ (2014)
• Methodology for measuring fundamental parameters and associated uncertainties for middle and cool main-sequence stars (2014)
• Magnetic fields of Ap stars from full Stokes spectropolarimetric observations (2014)
• Wavelength calibration from 1-5 mu m for the CRIRES plus high-resolution spectrograph at the VLT (2014)
• HIRES (2014)
• Upgrading CRIRES-VLT to cross-dispersed mode (2012)
• Starspot variability and evolution from modeling Kepler photometry of active late-type stars (2011)
• Kepler Observations of Starspot Evolution, Differential Rotation, and Flares on Late-Type Stars (2011)
• The search for magnetic fields in mercury-manganese stars (2011)
• Magnetic Fields of M-Dwarfs from the Molecular and Atomic Diagnostics (2011)
• The HARPS Polarimeter (2011)
• VAMDC (2011)
• VAMDC (2010)
• Magnetic fields in M dwarf stars from high-resolution infrared spectra (2009)
• 3-D Hydrodynamic Simulation of Convection in A Stars (2007)
• Optimal Extraction of Echelle Spectra (2007)
• Magnetic Doppler Imaging of Active Stars (2006)
• Pinning Down Gravitational Settling (2006)
• Cool stars in the Gaia photometric system (2005)
• Magnetic Fields and Stellar Surface Structures (2005)
• Magnetic Doppler Imaging: Mathematical Basis (2005)
• Hydrogen Balmer Lines as Probes of Stellar Atmospheres (2003)
• Balmer lines and effective temperatures in cool stars (2003)
• Tools and Methods for Abundance Analysis (2003)
• Magnetic Doppler Imaging of Chemically Peculiar Stars (2003)
• Magnetic Doppler imaging of early-type stars (2003)
• Magnetic Doppler imaging of solar-type stars (2003)
• Parametric Resonance and Magnetic Activity in Close Binary Systems (2003)
• Probing Magnetospheric Infall onto CTTS with Time-resolved Veiling Measurements (2003)
• The influence of global magnetic field evolution on the structure of atmospheres of early-type stars (2003)
• Spectroscopy of rapidly oscillating Ap stars (2002)
• Hydrogen Line Formation in Cool Stars (2001)
• New Measurements of T Tauri Magnetic Fields: Testing Magnetospheric Accretion (2001)
• Magnetic Doppler Imaging of alpha2 CVn (2001)
• The Search and Modelling of Magnetic Fields on M Dwarfs (2001)
• Time-Resolved Spectroscopy of the roAp Star gamma Equ (2001)
• Magnetic Doppler Imaging of CP Stars (2001)
• Magnetic Doppler Imaging of Chemically Peculiar Stars (2001)
• Doppler Imaging of Eclipsing Binary Systems ER Vul and TY Pyx (2001)
• Recent Developments of the VALD Database (2001)
• Using FeH to Measure Magnetic Fields on Cool Stars and Brown Dwarfs (2001)
• Chemical Stratification in Magnetic Ap Stars (2001)
• A Fiber-Linked Four Stokes-Parameter Polarimeter for the SOFIN Spectrometer on the Nordic Optical Telescope (1998)