Oleg Kochukhov
Professor at Institutionen för fysik och astronomi; Astronomi och rymdfysik
- Telephone:
- +46 18 471 59 93
- Fax:
- +46 18 471 59 99
- E-mail:
- oleg.kochukhov@physics.uu.se
- Visiting address:
- Ångströmlaboratoriet, Lägerhyddsvägen 1
- Postal address:
- Box 516
751 20 UPPSALA
More information is available to staff who log in.
Biography
I grew up in Crimea, Ukraine and studied physics at Simferopol University. I obtained PhD in astrophysics at Uppsala University and then worked as a postdoc at Vienna University and NORDITA before returning to Uppsala University.
Research
I study magnetic fields and associated activity phenomena (variability, temperature and chemical structure formation) on the surfaces stars. My scientific interests and research expertise include the physics of stellar atmospheres, stellar evolution and computer methods of indirect imaging of the surfaces of remote objects.
Publications
Recent publications
- First Chromospheric Activity and Doppler Imaging Study of PW And Using a New Doppler Imaging Code (2024)
- Optimising spectroscopic observations of transiting exoplanets (2024)
- From convective stellar dynamo simulations to Zeeman-Doppler images (2024)
- TESS Cycle 2 observations of roAp stars with 2-min cadence data (2024)
- Weakened Magnetic Braking in the Exoplanet Host Star 51 Peg (2024)
All publications
Articles
- First Chromospheric Activity and Doppler Imaging Study of PW And Using a New Doppler Imaging Code (2024)
- Optimising spectroscopic observations of transiting exoplanets (2024)
- From convective stellar dynamo simulations to Zeeman-Doppler images (2024)
- TESS Cycle 2 observations of roAp stars with 2-min cadence data (2024)
- Weakened Magnetic Braking in the Exoplanet Host Star 51 Peg (2024)
- The large-scale magnetic field of the M dwarf double-line spectroscopic binary FK Aqr* (2024)
- Monitoring the large-scale magnetic field of AD Leo with SPIRou, ESPaDOnS, and Narval (2023)
- Gaia Data Release 3 (2023)
- CRIRES+ on sky at the ESO Very Large Telescope (2023)
- Company for the Ultra-high Density, Ultra-short Period Sub-Earth GJ 367 b (2023)
- Determination of small-scale magnetic fields on Sun-like stars in the near-infrared using CRIRES+ (2023)
- A close-in giant planet escapes engulfment by its star (2023)
- Surface distribution of small-scale magnetic field on the active cool star LQ Hydrae (2023)
- Surface structure of 45 Hercules (2023)
- Retrieval of the dayside atmosphere of WASP-43b with CRIRES+ (2023)
- Asteroseismology and Spectropolarimetry of the Exoplanet Host Star Lambda Serpentis (2023)
- Constraints on Magnetic Braking from the G8 Dwarf Stars 61 UMa and tau Cet (2023)
- Accretion process, magnetic fields, and apsidal motion in the pre-main sequence binary DQ Tau (2023)
- CRIRES+ detection of CO emissions lines and temperature inversions on the dayside of WASP-18b and WASP-76b (2023)
- Simulating the Space Weather in the AU Mic System (2022)
- Approximate Bayesian neural Doppler imaging (2022)
- Discovery of Eight "Main-sequence Radio Pulse Emitters" Using the GMRT (2022)
- The magnetic field and magnetosphere of Plaskett's star (2022)
- Small-scale magnetic fields of the spectroscopic binary T Tauri stars V1878 Ori and V4046 Sgr (2022)
- Parameters of the eclipsing binary alpha Draconis observed by TESS and SONG (2022)
- Magnetic field topology, chemical spot distributions, and photometric variability of the Ap star phi Draconis (2022)
- Topological changes in the magnetic field of LQ Hya during an activity minimum (2022)
- The Origin of Weakened Magnetic Braking in Old Solar Analogs (2022)
- Time evolution of magnetic activity cycles in young suns (2022)
- Ultraviolet spectropolarimetry with Polstar (2022)
- MOBSTER - VI. The crucial influence of rotation on the radio magnetospheres of hot stars (2022)
- CRIRES+ detection of H2O and CO in the transmission spectra of WASP-107 b (2022)
- Zeeman-Doppler imaging of five young solar-type stars (2022)
- One Year in the Life of Young Suns (2021)
- Confirmation of ξ1 CMa’s ultra-slow rotation (2021)
- Magnetic field of the eclipsing binary UV Piscium (2021)
- TESS cycle 1 observations of roAp stars with 2-min cadence data (2021)
- Magnetic fields of M dwarfs (2021)
- V772 Cas (2021)
- TESS survey of rotational and pulsational variability of mercury-manganese stars (2021)
- New eclipsing binaries with mercury-manganese stars (2021)
- Magnetic and Rotational Evolution of rho CrB from Asteroseismology with TESS (2021)
- Comparative high-resolution spectroscopy of M dwarfs (2021)
- Detection of an extremely strong magnetic field in the double-degenerate binary merger product HD 144941 (2021)
- MOBSTER-V. Discovery of a magnetic companion star to the magnetic beta Cep pulsator HD 156424 (2021)
- τ9Eri (2021)
- Magnetic geometry and surface differential rotation of the bright Am star Alhena A (2020)
- Hidden magnetic fields of young suns (2020)
- The Magnetic Field of the Active Planet-hosting M Dwarf AU Mic (2020)
- The large-scale magnetic field of the eccentric pre-main-sequence binary system V1878 Ori (2020)
- The magnetic early B-type stars - IV. Breakout or leakage? (2020)
- 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" (2020)
- New BRITE-Constellation observations of the roAp star α Cir⋆ (2020)
- beta Cas (2020)
- Spot evolution on LQ Hya from 2006-2017 (2019)
- Rotation and pulsation in Ap stars (2019)
- Magnetic OB[A] Stars with TESS (2019)
- Starspot activity of HD199178 Doppler images from 1994-2017 (2019)
- Frequency of Coronal Mass Ejection Impacts with Early Terrestrial Planets and Exoplanets around Active Solar-like Stars (2019)
- Rotational and pulsational variability in the TESS light curve of HD 27463 (2019)
- Magnetic field topologies of the bright, weak-field Ap stars θ Aurigae and ε Ursae Majoris (2019)
- Magnetic Field of the Eclipsing M-dwarf Binary YY Gem (2019)
- HST/STIS analysis of the first main sequence pulsar CU Virginis (2019)
- Characterising the surface magnetic fields of T Tauri stars with high-resolution near-infrared spectroscopy (2019)
- Modeling a Carrington-scale Stellar Superflare and Coronal Mass Ejection from κ1Cet (2019)
- LBT/PEPSI Spectropolarimetry of a Magnetic Morphology Shift in Old Solar-type Stars (2019)
- MOBSTER - III. HD62658 (2019)
- The magnetic early B-type stars - III. A main-sequence magnetic, rotational, and magnetospheric biography (2019)
- NU Ori (2019)
- MOBSTER - II. Identification of rotationally variable A stars observed with TESS in sectors 1-4 (2019)
- Magnetic fields of intermediate-mass T Tauri stars (2019)
- Long-term spot monitoring of the young solar analogue V889 Herculis (2019)
- Magnetism, X-rays and accretion rates in WD 1145+017 and other polluted white dwarf systems (2018)
- Surface mapping of magnetic hot stars (2018)
- HD66051 (2018)
- Putting atomic diffusion theory of magnetic ApBp stars to the test (2018)
- A sudden change of the global magnetic field of the active M dwarf AD Leo revealed by full Stokes spectropolarimetric observations (2018)
- Mixed poloidal-toroidal magnetic configuration and surface abundance distributions of the Bp star 36 Lyn (2018)
- A theoretical tool for the study of radial velocities in the atmospheres of roAp stars (2018)
- Magnetic field topology of the cool, active, short-period binary system sigma(2) Coronae Borealis (2018)
- Magnetic field topology and chemical spot distributions of the Ap star HD 119419 (2018)
- The pulsationally modulated radial crossover signature of the slowly rotating magnetic B-type star xi(1) CMa (2018)
- HD 156324 (2018)
- Rotation, Emission, & Evolution of the Magnetic Early B-type Stars (2018)
- Testing parallaxes with local Cepheids and RR Lyrae stars (2017)
- The MiMeS survey of Magnetism in Massive Stars (2017)
- Doppler imaging of chemical spots on magnetic Ap/Bp stars (2017)
- The Global and Small-scale Magnetic Fields of Fully Convective, Rapidly Spinning M Dwarf Pair GJ65 A and B (2017)
- Surface magnetism of cool stars (2017)
- Magnetic field topology and chemical abundance distributions of the young, rapidly rotating, chemically peculiar star HR5624 (2017)
- BD-19 5044L (2017)
- Magnetic fields of intermediate mass T Tauri stars (2017)
- Strong dipole magnetic fields in fast rotating fully convective stars (2017)
- The complex magnetic field topology of the cool Ap star 49 Cam (2017)
- Gaia Data Release 1 (2017)
- Gaia Data Release 1 Summary of the astrometric, photometric, and survey properties (2016)
- Zeeman-Doppler imaging of active young solar-type stars (2016)
- Magnetic field topology of tau Scorpii (2016)
- The Gaia mission (2016)
- Magnetic fields of young solar twins (2016)
- Three-dimensional magnetic and abundance mapping of the cool Ap star HD 24712 (2016)
- Magnetic Doppler imaging of the chemically peculiar star HD 125248 (2016)
- The MiMeS survey of magnetism in massive stars (2016)
- Activity and magnetic field structure of the Sun-like planet-hosting star HD 1237 (2015)
- Doppler imaging of LQ Hydrae for 1998-2002 (2015)
- Diagnostic of stellar magnetic fields with cumulative circular polarisation profiles (2015)
- Magnetic field topology and chemical spot distributions in the extreme Ap star HD 75049 (2015)
- Revisiting the rigidly rotating magnetosphere model for sigma Ori E - II. Magnetic Doppler imaging, arbitrary field RRM, and light variability (2015)
- First Zeeman Doppler Imaging of a Cool Star Using All Four Stokes Parameters (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)
- The magnetic field topology and chemical abundance distributions of the Ap star HD 32633 (2015)
- The surface magnetic field and chemical abundance distributions of the B2V helium-strong star HD 184927 (2015)
- Discovery of new magnetic early-B stars within the MiMeS HARPSpol survey (2014)
- Searching for a gas cloud surrounding the WASP-18 planetary system (2014)
- An in-depth spectroscopic analysis of RR Lyr Variations over the pulsation cycle (2014)
- Magnetic field topology of the unique chemically peculiar star CU Virginis (2014)
- The Effect Of Isotopic Splitting On The Bisector And Inversions Of The Solar Ca II 854.2 nm Line (2014)
- Doppler images of DI Piscium during 2004-2006 (2014)
- Interferometry of chemically peculiar stars (2014)
- Exploring the magnetic field complexity in M dwarfs at the boundary to full convection (2014)
- Stokes IQUV magnetic Doppler imaging of Ap stars - III. Next generation chemical abundance mapping of alpha(2) CVn (2014)
- Stokes IQUV magnetic Doppler imaging of Ap stars - II. Next generation magnetic Doppler imaging of alpha(2) CVn star (2014)
- The dramatic change of the fossil magnetic field of HD 190073 (2013)
- The importance of non-photon noise in stellar spectropolarimetry The spurious detection of a non-existing magnetic field in the AO supergiant HD 92207 (2013)
- Orbital parameters, chemical composition and magnetic field of the Ap binary HD 98088 (2013)
- Absorbing gas around the WASP-12 planetary system (2013)
- Detection of a magnetic field in three old and inactive solar-like planet-hosting stars (2013)
- Magnetically Controlled Accretion on the Classical T Tauri Stars GQ Lupi and TW Hydrae (2013)
- Discovery of new rapidly oscillating Ap pulsators in the UVES survey of cool magnetic Ap stars (2013)
- Are there tangled magnetic fields on HgMn stars? (2013)
- Magnetic field topology of the RS CVn star II Pegasi (2013)
- Detectability of small-scale magnetic fields in early-type stars (2013)
- Multiple views of magnetism in cool stars (2013)
- A self-consistent chemically stratified atmosphere model for the roAp star 10 Aquilae (2013)
- Radial velocity signatures of Zeeman broadening (2013)
- Basic parameters and properties of the rapidly rotating magnetic helium-strong B star HR 7355 (2013)
- Strong variable linear polarization in the cool active star II Peg (2013)
- Three-dimensional magnetic and abundance mapping of the cool Ap star HD 24712 (2013)
- Fundamental parameters of bright Ap stars from wide-range energy distributions and advanced atmospheric models (2013)
- Chemical composition and evolutionary status of the Ap star HD 138633 (2013)
- Denoising spectroscopic data by means of the improved least-squares deconvolution method (2013)
- Discovery of the longest period rapidly oscillating Ap star HD177765 (2012)
- Magnetic field measurements and their uncertainties (2012)
- Doppler images of II Pegasi for 2004-2010 (2012)
- Magnetic Doppler imaging considering atmospheric structure modifications due to local abundances (2012)
- Magnetism, chemical spots, and stratification in the HgMn star ϕ Phoenicis (2012)
- HD96446 (2012)
- Multi-element Doppler imaging of the CP2 star HD 3980 (2012)
- Revisiting the Rigidly Rotating Magnetosphere model for sigma Ori E-I (2012)
- How reliable is Zeeman Doppler imaging without simultaneous temperature reconstruction? (2012)
- Stokes IQUV magnetic Doppler imaging of Ap stars - I. ESPaDOnS and NARVAL observations (2012)
- First HARPSpol discoveries of magnetic fields in massive stars (2011)
- Magnetic field and atmospheric chemical abundances of the magnetic Ap star HD 318107 (2011)
- Distance scale zero points from galactic RR Lyrae star parallaxes (2011)
- A detailed spectroscopic analysis of the open cluster NGC 5460 (2011)
- Spot activity of II Peg (2011)
- The extraordinary complex magnetic field of the helium-strong star HD 37776 (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)
- 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)
- Abundance and stratification analysis of the chemically peculiar star HD 103498 (2011)
- HARPSpol - The New Polarimetric Mode for HARPS (2011)
- Pulsations in the atmosphere of the rapidly oscillating star 33 Lib (2011)
- Rotation, magnetism and metallicity of M dwarf systems (2011)
- Stellar libraries for Gaia (2011)
- Magnetic field, chemical composition and line profile variability of the peculiar eclipsing binary star AR Aur (2010)
- A detailed spectropolarimetric analysis of the planet-hosting star WASP-12 (2010)
- 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)
- Magnetic Doppler imaging of alpha(2) Canum Venaticorum in all four Stokes parameters (2010)
- An in-depth spectroscopic analysis of the Blazhko star RR Lyrae (2010)
- Surface structure of the CoRoT CP2 target star HD50773 (2010)
- Magnetic Doppler imaging of the roAp star HD 24712 (2010)
- The Lorentz force in atmospheres of chemically peculiar stars (2010)
- Modelling the light variability of the Ap star epsilon Ursae Majoris (2010)
- Modelling the molecular Zeeman-effect in M-dwarfs (2010)
- Synthetic stellar and SSP libraries as templates for Gaia simulations (2010)
- The chemical abundance analysis of normal early A- and late B-type stars (2009)
- Simulations of Magnetoacoustic Pulsations in Atmospheres of Rapidly Oscillating Ap Stars (2009)
- VALD — an atomic and molecular database for astrophysics (2008)
- Model atmospheres of magnetic CP stars (2008)
- Magnetic Doppler imaging of Ap stars (2008)
- Late stages of the evolution of A-type stars on the main sequence (2007)
- Weather in stellar atmosphere revealed by the dynamics of mercury clouds in alpha Andromedae (2007)
- Line profile variations in rapidly oscillating Ap stars (2007)
- A high-precision search for magnetic field oscillations in the roAp star HD 24712 (2007)
- Pulsation tomography of rapidly oscillating Ap stars (2007)
- Pulsation in the atmosphere of the roAp star HD 24712 (2007)
- The Lorentz force in atmospheres of CP stars (2007)
- Pulsational line profile variation of the roAp star HR 3831 (2006)
- Spectroscopic study of the pulsations in the roAp star HD 24712 (2006)
- Remarkable non-dipolar magnetic field of the Bp star HD 137509 (2006)
- Evolutionary state of magnetic chemically peculiar stars (2006)
- Chemical stratification in the atmosphere of Ap star HD 133792. Regularized solution of the vertical inversion problem (2006)
- HD 178892 - a cool Ap star with extremely strong magnetic field (2006)
- Rare-earth elements in the atmosphere of the magnetic chemically peculiar star HD 144897 (2006)
- Variation of the line profile moments for stars pulsating in distorted oblique non-radial modes (2005)
- Stellar model atmospheres with magnetic line blanketing (2005)
- Inhomogeneous distribution of mercury on the surfaces of rapidly rotating HgMn stars (2005)
- Abundances and chemical stratification analysis in the atmosphere of Cr-type star HD 204411 (2005)
- Stellar activity and magnetism studied by optical interferometry (2004)
- Doppler imaging of stellar non-radial pulsations. I. Techniques and numerical experiments (2004)
- Indirect imaging of nonradial pulsations in a rapidly oscillating Ap star (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)
- The null result of a search for pulsational variations of the surface magnetic field in the roAp star gamma Equulei (2004)
- No magnetic field variation with pulsation phase in the roAp star gamma Equulei (2004)
- The spectroscopic signature of roAp stars (2004)
- The influence of magnetic fields on the hydrostatic structure of the atmospheres of chemically peculiar stars (2004)
- Atmospheric parameters and chemical composition of the ultra-cool roAp star HD 213637 (2003)
- The variability of the HgII lambda 3984 line of the mercury-manganese star alpha Andromedae (2002)
- Detailed analysis of Balmer lines in cool dwarf stars (2002)
- Interpretation of the Core-Wing Anomaly of Balmer line profiles of cool Ap stars (2002)
- Discovery of rapid radial velocity variations in the roAp star 10 Aql and possible pulsations of beta CrB (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)
- Abundance stratification and pulsation in the atmosphere of the roAp star gamma Equulei (2002)
- Time-resolved spectroscopy of the roAp star gamma Equ (2001)
- Pulsational and rotational line profile variations of the roAp stars alpha Cir and HR 3831 (2001)
- Vertical Chromium Distribution in the Atmosphere of a Chemically Peculiar Star. II. Modeling (2001)
- Vertical Chromium Distribution in the Atmosphere of a Chemically Peculiar Star. I. Diagnostics (2001)
- LTE spectrum synthesis in magnetic stellar atmospheres - The interagreement of three independent polarised radiative transfer codes (2001)
- Vertical stratification of Cr in the atmospheres of chemically peculiar stars (1998)
- Chemical composition of the CP Hg-Mn components of approximately equal mass in the SB2 system 46 Draconis (1998)
Chapters
Conferences
- The Magnetic delta Scuti Star beta Cas (2019)
- Magnetic Stars Observed by BRITE (2018)
- The importance of non-photon noise in astronomical spectropolarimetry (2015)
- Comprehensive and Critical Reanalysis of FORS Spectropolarimetric Observations (2015)
- Multi-line techniques for inference of stellar magnetic fields (2015)
- Magnetic fields in A stars besides Ap stars (2014)
- Magnetic fields of Ap stars from full Stokes spectropolarimetric observations (2014)
- Interferometry of CP stars (2014)
- Analysis of surface structures of chemically peculiar stars with modern and future interferometers (2014)
- HIRES (2014)
- Stellar magnetism through the polarized eyes of the FORS1 instrument (2012)
- HARPS spectropolarimetry of classical T Tauri stars (2012)
- Characterizing the magnetic fields of the first τ Sco analogues (2012)
- Magnetic Doppler imaging of early-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)
- Magnetic fields in M dwarf stars from high-resolution infrared spectra (2009)
- Eclipsing binaries as a test for synthetic photometry (2007)
- Spectropolarimetry of magnetic hot stars (2007)
- Observations of pulsations in roAp stars (2007)
- 3-D Hydrodynamic Simulation of Convection in A Stars (2007)
- First magnetic Doppler images of a roAp star (2007)
- Vertical structure of pulsations in roAp stars (2007)
- Atmospheres of CP stars: magnetic field effects (2007)
- Variability of Balmer Profiles in Magnetic Ap/Bp Stars (2007)
- Spectroscopic study of the pulsations in the roAp star HD 24712 (2006)
- Spectroscopy of roAp star pulsation: HD 24712 (2006)
- Magnetic Doppler Imaging of Active Stars (2006)
- Spectroscopic analysis of chemically peculiar stars: abundance determination of lithium and some rare earth elements (2005)
- Toward 3-D pulsation maps of roAp stars (2005)
- Atmospheres of CP stars: magnetic field effects (2005)
- The Lorentz force in atmosphere of CP stars: theta Aur (2005)
- Stellar model atmospheres with magnetic line blanketing (2004)
- Modelling Stokes parameter spectra of CP stars (2004)
- Diffusion and magnetic field effects on stellar surfaces (2004)
- Indirect imaging of stellar nonradial pulsations (2004)
- Vertical and horizontal abundance structures of the roAp star HD 24712 (2004)
- Element stratification in the atmospheres of two superficially non-magnetic Ap stars of Cr type (2004)
- Radial velocity pulsations in the atmosphere of the roAp star HD 24712 (2004)
- Pulsational velocity fields in the atmospheres of two roAp stars: HR 1217 and gamma Equ (2004)
- Balmer lines and effective temperatures in cool stars (2003)
- Interpretation of the Core-Wing Anomaly of Balmer line profiles of cool Ap stars (2003)
- Mapping abundance inhomogeneities and magnetic fields of chemically peculiar (CP) stars with aperture synthesis arrays (2003)
- Spectroscopic observations of roAp pulsations (2003)
- Multi-element abundance Doppler imaging of the roAp star HR 3831 (2003)
- Magnetic Doppler Imaging of Chemically Peculiar Stars (2003)
- Observations of rapid radial velocity variations of spectral lines in rapidly oscillating Ap (roAp) stars (2003)
- Magnetic Doppler imaging of early-type stars (2003)
- Magnetic Doppler imaging of solar-type stars (2003)
- The influence of global magnetic field evolution on the structure of atmospheres of early-type stars (2003)
- Time-resolved high-resolution spectroscopy of roAp stars (2002)
- Spectroscopy of rapidly oscillating Ap stars (2002)
- Hydrogen Line Formation in Cool Stars (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 Chemically Peculiar Stars (2001)
- Spectrum variability of the HgMn star alpha And (2001)
Other
