Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Harry J. Lehto"'
Autor:
Ossi Nokelainen, Patrik Lauha, Sebastian Andrejeff, Jari Hänninen, Jasmin Inkinen, Aleksi Kallio, Harry J. Lehto, Marko Mutanen, Riku Paavola, Pauliina Schiestl-Aalto, Panu Somervuo, Janne Sundell, Jussi Talaskivi, Mikko Vallinmäki, Aurélie Vancraeyenest, Ari Lehtiö, Otso Ovaskainen
Publikováno v:
Citizen Science: Theory and Practice, Vol 9, Iss 1, Pp 24-24 (2024)
Citizen science covers initiatives from crowdsourcing, distributed intelligence, and participatory science, to extreme citizen science. Terminological overlap, varied project aims, and cultural differences in the fields of research have, however, led
Externí odkaz:
https://doaj.org/article/1867e0525f1741e48bcbe4683e394fc7
Autor:
Mauri J. Valtonen, Staszek Zola, Alok C. Gupta, Shubham Kishore, Achamveedu Gopakumar, Svetlana G. Jorstad, Paul J. Wiita, Minfeng Gu, Kari Nilsson, Alan P. Marscher, Zhongli Zhang, Rene Hudec, Katsura Matsumoto, Marek Drozdz, Waldemar Ogloza, Andrei V. Berdyugin, Daniel E. Reichart, Markus Mugrauer, Lankeswar Dey, Tapio Pursimo, Harry J. Lehto, Stefano Ciprini, T. Nakaoka, M. Uemura, Ryo Imazawa, Michal Zejmo, Vladimir V. Kouprianov, James W. Davidson Jr., Alberto Sadun, Jan Štrobl, Z. R. Weaver, Martin Jelínek
Publikováno v:
The Astrophysical Journal Letters, Vol 968, Iss 2, p L17 (2024)
We report the study of a huge optical intraday flare on 2021 November 12 at 2 a.m. UT in the blazar OJ 287. In the binary black hole model, it is associated with an impact of the secondary black hole on the accretion disk of the primary. Our multifre
Externí odkaz:
https://doaj.org/article/e6e575b905e5482a8bee0479a0634bbd
Autor:
Miika Kotila, Samuli Helle, Harry J. Lehto, Danny Rojas, Eero J. Vesterinen, Thomas M. Lilley
Publikováno v:
Frontiers in Ecology and Evolution, Vol 10 (2022)
The peak frequency of bat echolocation is a species-specific functional trait linked to foraging ecology. It is tailored via evolution to suit conditions within the distribution range of each species, but the evolutionary drivers are not yet well-und
Externí odkaz:
https://doaj.org/article/f34377a8f64b43fb9dbb4def3b59eac2
Autor:
Mauri J. Valtonen, Lankeswar Dey, Achamveedu Gopakumar, Staszek Zola, Anne Lähteenmäki, Merja Tornikoski, Alok C. Gupta, Tapio Pursimo, Emil Knudstrup, Jose L. Gomez, Rene Hudec, Martin Jelínek, Jan Štrobl, Andrei V. Berdyugin, Stefano Ciprini, Daniel E. Reichart, Vladimir V. Kouprianov, Katsura Matsumoto, Marek Drozdz, Markus Mugrauer, Alberto Sadun, Michal Zejmo, Aimo Sillanpää, Harry J. Lehto, Kari Nilsson, Ryo Imazawa, Makoto Uemura
Publikováno v:
Galaxies, Vol 11, Iss 4, p 82 (2023)
We present a summary of the results of the OJ 287 observational campaign, which was carried out during the 2021/2022 observational season. This season is special in the binary model because the major axis of the precessing binary happens to lie almos
Externí odkaz:
https://doaj.org/article/f417436aeaf440128c5aa7366d0a29a7
Autor:
Mauri J Valtonen, Staszek Zola, A Gopakumar, Anne Lähteenmäki, Merja Tornikoski, Lankeswar Dey, Alok C Gupta, Tapio Pursimo, Emil Knudstrup, Jose L Gomez, Rene Hudec, Martin Jelínek, Jan Štrobl, Andrei V Berdyugin, Stefano Ciprini, Daniel E Reichart, Vladimir V Kouprianov, Katsura Matsumoto, Marek Drozdz, Markus Mugrauer, Alberto Sadun, Michal Zejmo, Aimo Sillanpää, Harry J Lehto, Kari Nilsson, Ryo Imazawa, Makoto Uemura
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 521:6143-6155
Publisher Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society. The bright blazar OJ 287 routinely parades high brightness bremsstrahlung flares, which are explained as being a result of a seco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4259cb5c824a11478c5c4b99ce584b07
https://doi.org/10.1093/mnras/stad922
https://doi.org/10.1093/mnras/stad922
Autor:
Uemura, Mauri J. Valtonen, Lankeswar Dey, Achamveedu Gopakumar, Staszek Zola, Anne Lähteenmäki, Merja Tornikoski, Alok C. Gupta, Tapio Pursimo, Emil Knudstrup, Jose L. Gomez, Rene Hudec, Martin Jelínek, Jan Štrobl, Andrei V. Berdyugin, Stefano Ciprini, Daniel E. Reichart, Vladimir V. Kouprianov, Katsura Matsumoto, Marek Drozdz, Markus Mugrauer, Alberto Sadun, Michal Zejmo, Aimo Sillanpää, Harry J. Lehto, Kari Nilsson, Ryo Imazawa, Makoto
Publikováno v:
Galaxies; Volume 11; Issue 4; Pages: 82
We present a summary of the results of the OJ 287 observational campaign, which was carried out during the 2021/2022 observational season. This season is special in the binary model because the major axis of the precessing binary happens to lie almos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=multidiscipl::baa32c3174a05bafd880b34ab08f598c
Autor:
Seppo Mikkola, Harry J. Lehto
Publikováno v:
Celestial Mechanics and Dynamical Astronomy. 134
We compare the performance of four symplectic integration methods with leading order symplectic corrector in simulations of the Solar System. These simulations cover 10 Gyr. They are longer than the astrophysical predicted future of the present-day S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f690a429ba6071cea6681688de6d9c5
https://doi.org/10.1007/s10569-021-10058-0
https://doi.org/10.1007/s10569-021-10058-0
Publikováno v:
Astronomy & Astrophysics. 372:945-951
We present results of the rst simultaneous UBVRI-photopolarimetric observations of the long period (4.6 hrs) AM Herculis system RX J0203.8+2959. The observed circular polarization shows both negative and positive polarization, from +7% to 5% in the B
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9776260ae881f147fd1f308171e5022
https://doi.org/10.1051/0004-6361:20010549
https://doi.org/10.1051/0004-6361:20010549
Autor:
Mark R. Kidger, R. Rekola, H. Pietilä, R. K. Honeycutt, Merja Tornikoski, K. Nilsson, G. Poyner, G. M. Richter, N. M. Shakhovskoy, N. Gonzalez-Perez, H. Teräsranta, Philip A. Hughes, S. Katajainen, M. G. Nikolashvili, J. V. Linde, W. Weneit, G. de Francesco, Mauri Valtonen, E. Massaro, Jochen Heidt, S. Wiren, Jeff W. Robertson, Roberto Nesci, Leo O. Takalo, F. Montagni, A. Riehokainen, A. C. Sadun, Omar M. Kurtanidze, Stefan Wagner, Pekka Heinämäki, C. M. Raiteri, J. A. de Diego, Deborah Dultzin-Hacyan, P. A. Charles, John K. Webb, E. Valtaoja, Alan P. Marscher, Margo F. Aller, P. Boltwood, M. Hanski, Pasi Nurmi, M. Maesano, M. Kümmel, G. Sobrito, Massimo Fiorucci, Markku Lainela, Volker Beckmann, Pekka Teerikorpi, J. M. Rodriguez-Espinoza, T. Mahoney, U. Borgeest, Hugh D. Aller, K. J. Schramm, L. Lanteri, M. Villata, Lewis B. G. Knee, Matthias Dietrich, D. Kühl, Erika Benítez, Anne Lähteenmäki, Harry J. Lehto, G. Tosti, Yu. S. Efimov, H. Bock, A. Sillanpää, S. G. Marchenko, G. W. Turner, T. Pursimo, G. Ghisellini, T. Schramm, K. Karlamaa
Publikováno v:
Scopus-Elsevier
We present intensive optical, infrared, and radio monitoring observations of the BL Lac object OJ 287, taken between the years 1993-1998. Two large optical outbursts were detected at the predicted times in November 1994 and December 1995. The detecti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a80ea3ab9785496d68bf9734ffb35d8
https://doi.org/10.1051/aas:2000264
https://doi.org/10.1051/aas:2000264
Publikováno v:
International Astronomical Union Colloquium. 174:314-317
We have investigated the behavior of a general Newtonian three body system using the simplest initial conditions. We calculated the evolution of about a million bound three body systems. Within our resolution these cover all the possible initial stat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ad791748fb6a0d3012e1187e0f45458
https://doi.org/10.1017/s0252921100055196
https://doi.org/10.1017/s0252921100055196