Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Oleg Kochukhov"'
Autor:
Oleg Kochukhov
Magnetic fields play a fundamental role for interior and atmospheric properties of M dwarfs and greatly influence terrestrial planets orbiting in the habitable zones of these low-mass stars. Determination of the strength and topology of magnetic fiel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00ddabed2d8209ce68e893dafdc6fb98
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-434906
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-434906
HD 144941 is an extreme He (EHe) star, a rare class of subdwarf OB star formed from the merger of two white dwarf (WD) stars. Uniquely amongst EHe stars, its light curve has been reported to be modulated entirely by rotation, suggesting the presence
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1555ffab93077d0a082b2645691d7b11
Autor:
Aurore Blazère, Stéphane Mathis, Morgan Deal, Oleg Kochukhov, Colin P. Folsom, Coralie Neiner, Pascal Petit, John D. Landstreet
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 492 (4), pp.5794-5810. ⟨10.1093/mnras/stz3637⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 492 (4), pp.5794-5810. ⟨10.1093/mnras/stz3637⟩
Alhena A ($\gamma$ Gem A) is a bright Am star, with the strongest disc-integrated magnetic field strength reported so far for an Am star. Its spectrum exhibits standard circularly polarized Zeeman signatures, contrary to all previously studied Am sta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f62b631d37c57a6ce89cd099c317403
http://arxiv.org/abs/1912.08688
http://arxiv.org/abs/1912.08688
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 471:962-975
49 Cam is a cool magnetic chemically peculiar star which has been noted for showing strong, complex Zeeman linear polarisation signatures. This paper describes magnetic and chemical surface maps obtained for 49 Cam using the INVERS10 magnetic Doppler
Autor:
Paulo J. V. Garcia, Gregg A. Wade, Evelyne Alecian, Feng Gao, J.-B. Le Bouquin, Véronique Petit, Oleg Kochukhov, Sylvestre Lacour, R. Grellmann, M. Karl, Matt Shultz, Th. Rivinius, Chien-Cheng Lin, Oliver Pfuhl
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2019, 482 (3), pp.3950-3965. ⟨10.1093/mnras/sty2985⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2019, 482 (3), pp.3950-3965. ⟨10.1093/mnras/sty2985⟩
NU Ori is a massive spectroscopic and visual binary in the Orion Nebula Cluster, with 4 components: Aa, Ab, B, and C. The B0.5 primary (Aa) is one of the most massive B-type stars reported to host a magnetic field. We report the detection of a spectr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d39a35f6abc038342e9798e29c30e17
https://hal.archives-ouvertes.fr/hal-02368653
https://hal.archives-ouvertes.fr/hal-02368653
Autor:
David J. James, Joshua Pepper, J. Labadie-Bartz, Keivan G. Stassun, Véronique Petit, Alexandre David-Uraz, Gregg A. Wade, Joseph E. Rodriguez, Oleg Kochukhov, Cole Johnston, Michael B. Lund, Matt Shultz
Publikováno v:
Monthly Notices of the Royal Astronomical Society
HD 62658 (B9p V) is a little-studied chemically peculiar star. Light curves obtained by the Kilodegree Extremely Little Telescope (KELT) and Transiting Exoplanet Survey Satellite (TESS) show clear eclipses with a period of about 4.75 d, as well as ou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b3ba5bcdea0ace99448cb27c5c7411a
Autor:
Oleg Kochukhov
Recent developments in astrophysical spectropolarimetry have significantly expanded our understanding of stellar magnetism. Using modern instrumentation and data analysis methods it is becoming possible to detect and characterise surface magnetic fie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c781066c894e26f5e9373f6fd682919
https://doi.org/10.1017/9781316160916.004
https://doi.org/10.1017/9781316160916.004
Autor:
Jay Farihi, Seth Redfield, Jon C. Mauerhan, Brian D. Metzger, Nicholas C. Stone, Oleg Kochukhov, Boris T. Gänsicke, P. W. Cauley, Luca Fossati, Peter J. Wheatley, S. Bachman, Nicholas Achilleos
This paper reports circular spectropolarimetry and X-ray observations of several polluted white dwarfs including WD 1145+017, with the aim to constrain the behavior of disk material and instantaneous accretion rates in these evolved planetary systems
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c88276cce11f655034ea483959c32f3
Autor:
Gregg A. Wade, Colin P. Folsom, J. Silvester, David A. Hanes, Stefano Bagnulo, Oleg Kochukhov
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 426:1003-1030
In this paper we describe and evaluate new spectral line polarisation observations obtained with the goal of mapping the surfaces of magnetic Ap stars in great detail. One hundred complete or partial Stokes IQUV sequences, corresponding to 297 indivi
The goal of this work is to study the magnetic fields of six young solar-analogue stars both individually, and collectively, to search for possible magnetic field trends with age. If such trends are found, they can be used to understand magnetism in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::383b7947666d8eee6492744a66153adc