TH
Thomas Hackman
astro-ph.SRastro-ph.EPastro-phastro-ph.GAastro-ph.IM
On Valency
published · living versionsW_7a8q4vfv·v1 · currentpublished
Flip-flops of FK Comae Berenices
with Jaan Pelt, Maarit J. Mantere, Lauri Jetsu, Heidi Korhonen +4
1 version
Preprints & journals
44 papers in the corpus · 2000–2026Magnetic activity in cool stars: manifestations and relevance to exoplanets2606.31617v2 · E. Is\ik, A. Valio, A. Strugarek et al.2026 · 0 citationsarXiv
Searching for Magnetic White Dwarfs in LAMOST DR102603.11004v1 · Si-Cheng Yu, Juan-Juan Ren, Vitaly V. Neustroev et al.2026 · 1 citationA&A 708, A275 (2026)
Characterisation of starspot structure and differential rotation of Kepler-4112602.09224v2 · Mikko Tuomi, Andr'as Haris, Thomas Hackman2026 · 0 citationsarXiv
Magnetic evolution of complex solar active regions2505.21759v1 · Shabnam Nikbakhsh, Eija I. Tanskanen, Thomas Hackman2025 · 0 citationsarXiv
Homogeneous search for spot transits in Kepler and TESS photometry of K M-type main-sequence stars2502.18129v1 · Andr'as Haris, Mikko Tuomi, Thomas Hackman2025 · 2 citationsA&A 704, A102 (2025)
Characterising the stellar differential rotation based on largest-spot statistics from ground-based photometry2410.06076v1 · Mikko Tuomi, Jyri J. Lehtinen, Gregory W. Henry et al.2024 · 0 citationsA&A, 689, A262 (2024)
Surface distribution of small-scale magnetic field on the active cool star LQ Hydrae2312.04136v1 · O. Kochukhov, T. Hackman, J.J. Lehtinen2023 · 6 citationsarXiv
From convective stellar dynamo simulations to Zeeman-Doppler images2306.07838v2 · Thomas Hackman, Oleg Kochukhov, Mariangela Viviani et al.2023 · 7 citationsarXiv
V889 Her: abrupt changes in the magnetic field or differential rotation?2203.13398v2 · Teemu Willamo, Thomas Hackman, Jyri J. Lehtinen et al.2022 · 4 citationsarXiv
Zeeman-Doppler imaging of five young solar-type stars2110.06729v2 · T. Willamo, J. J. Lehtinen, T. Hackman et al.2021 · 24 citationsA&A 659, A71 (2022)
Hidden magnetic fields of young suns2002.10469v1 · O. Kochukhov, T. Hackman, J.J. Lehtinen et al.2020 · 88 citationsA&A 635, A142 (2020)
Shapes of stellar activity cycles2002.04300v2 · T. Willamo, T. Hackman, J. J. Lehtinen et al.2020 · 12 citationsA&A 638, A69 (2020)
Topological changes in the magnetic field of LQ Hya during an activity minimum1909.11028v2 · Jyri J. Lehtinen, Maarit J. Kapyla, Thomas Hackman et al.2019 · 20 citationsA&A 660, A141 (2022)
Differences in the solar cycle variability of simple and complex active regions during 1996-20181908.02226v1 · Shabnam Nikbakhsh, Eija Tanskanen, Maarit Kapyla et al.2019 · 24 citationsA&A 629, A45 (2019)
Author Correction: Solar superstorm of AD 774 recorded subannually by Arctic tree rings.30874555 · Uusitalo, J, Arppe, L, Hackman, T et al.2020 · 0 citationsNature communications. 2019;10(1):1292
Starspot activity of HD 199178. Doppler images from 1994--20171812.02013v2 · Thomas Hackman, Iya Ilyin, Jyri J. Lehtinen et al.2018 · 21 citationsA&A 625, A79 (2019)
Long-term spot monitoring of the young solar analogue V889 Her1811.05330v2 · T. Willamo, T. Hackman, J. J. Lehtinen et al.2018 · 16 citationsA&A 622, A170 (2019)
Solar superstorm of AD 774 recorded subannually by Arctic tree rings.30154404 · Uusitalo, J, Arppe, L, Hackman, T et al.2018 · 63 citationsNature communications. 2018;9(1):3495
Contemporaneous Imaging Comparisons of the Spotted Giant Geminorum Using Interferometric, Spectroscopic, and Photometric Data1709.10109v1 · Rachael M. Roettenbacher, John D. Monnier, Heidi Korhonen et al.2017 · 37 citationsarXiv
Magnetic fields of young solar twins1605.03026v1 · L. Ros'en, O. Kochukhov, T. Hackman et al.2016 · 58 citationsA&A 593, A35 (2016)
Time series analysis of long-term photometry of BM Canum Venaticorum1601.03536v4 · L. Siltala, L. Jetsu, T. Hackman et al.2016 · 3 citationsarXiv
Activity trends in young solar-type stars1509.06606v2 · Jyri Lehtinen, Lauri Jetsu, Thomas Hackman et al.2015 · 83 citationsA&A 588, A38 (2016)
Zeeman-Doppler imaging of active young solar type stars1509.02285v2 · Thomas Hackman, Jyri Lehtinen, Lisa Ros'en et al.2015 · 25 citationsA&A 587, A28 (2016)
Study of FK Comae Berenices: VII. Correlating photospheric and chromospheric activity1505.07119v1 · K. Vida, H. Korhonen, I.V. Ilyin et al.2015 · 11 citationsA&A 580, A64 (2015)
Doppler Imaging of LQ Hya for 1998-20021504.03673v1 · E.M. Cole, T. Hackman, M. J. Kapyla et al.2015 · 12 citationsA&A 581, A69 (2015)
Stellar activity as noise in exoplanet detection I. Methods and application to solar-like stars and activity cycles1501.00981v1 · H. Korhonen (FINCA, NBI, StarPlan) et al.2015 · 25 citationsarXiv
Doppler images and the underlying dynamo. The case of AF Leporis1412.2892v1 · S.P. Jarvinen, R. Arlt, T. Hackman et al.2014 · 11 citationsA&A 574, A25 (2015)
Multiperiodicity, modulations and flip-flops in variable star light curves III. Carrier fit analysis of LQ Hya photometry for 1982-20141412.0457v1 · Nigul Olspert, Maarit J. Kapyla, Jaan Pelt et al.2014 · 19 citationsA&A 577, A120 (2015)
Spot activity of the RS CVn star {\sigma} Geminorum1311.1116v1 · P. Kajatkari, T. Hackman, L. Jetsu et al.2013 · 19 citationsarXiv
Periodicity in some light curves of the solar analogue V352 CMa1310.4280v1 · P. Kajatkari, L. Jetsu, E. Cole et al.2013 · 4 citationsarXiv
Multiperiodicity, modulations and flip-flops in variable star light curves II. Analysis of II Peg photometry during 1979-20101304.4144v1 · Marjaana Lindborg, Maarit J. Mantere, Nigul Olspert et al.2013 · 27 citationsarXiv
Magnetic field topology of the RS CVn star II Pegasi1301.1680v1 · O. Kochukhov, M. J. Mantere, T. Hackman et al.2013 · 55 citationsarXiv
Flip-flops of FK Comae Berenices1211.0914v2 · Thomas Hackman, Jaan Pelt, Maarit J. Mantere et al.2012 · 49 citationsarXivon Valency
Spot activity of LQ Hya from photometry between 1988 and 20111203.1555v2 · J. Lehtinen, L. Jetsu, T. Hackman et al.2012 · 32 citationsarXiv
Dependence of the large-scale vortex instability on latitude, stratification and domain size1109.4317v2 · Maarit J. Mantere, Petri J. Kapyla, Thomas Hackman2011 · 21 citationsarXiv
Doppler images of II Pegasi for 2004-20101106.6237v2 · Thomas Hackman, Maarit J. Mantere, Marjaana Lindborg et al.2011 · 30 citationsarXiv
Starspots due to large-scale vortices in rotating turbulent convection1106.6029v2 · P. J. Kapyla, M. J. Mantere, T. Hackman2011 · 55 citationsAstrophys. J., 742, 34 (2011)
Doppler images of the RS CVn binary II Pegasi during the years 1994-20021006.3060v1 · Lindborg, M., Korpi et al.2010 · 30 citationsarXiv
Dynamical evolution of titanium, strontium, and yttrium spots on the surface of the HgMn star HD 117531003.1902v1 · M. Briquet, H. Korhonen, J.F. Gonzalez et al.2010 · 49 citationsarXiv
Ellipsoidal primary of the RS CVn binary zeta And: Investigation using high-resolution spectroscopy and optical interferometry1002.4201v1 · H. Korhonen (ESO), M. Wittkowski (ESO), Zs. Kovari (Konkoly) et al.2010 · 12 citationsarXiv
Surface temperature maps for II Peg during 1999-20020911.0198v1 · M. Lindborg, M. J. Korpi, I. Tuominen et al.2009 · 0 citationsarXiv
First measurement of the magnetic field on FK Com and its relation to the contemporaneous starspot locations0812.0603v1 · H. Korhonen (ESO), S. Hubrig (ESO), S.V. Berdyugina (KIS) et al.2008 · 25 citationsarXiv
Surface imaging of HD 199178 (V1794 Cygni)astro-ph/0106118v1 · T. Hackman, L. Jetsu, I. Tuominen2001 · 58 citationsarXiv
Study of FK Comae Berenices. II. Spot evolution from 1994 to 1997astro-ph/0007088v1 · H. Korhonen, S.V. Berdyugina, T. Hackman et al.2000 · 2 citationsarXiv
Career total: at least 144 works. 44 are in this corpus.
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