Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Olah, Katalin"'
Autor:
Vida, Krisztián, Kővári, Zsolt, Leitzinger, Martin, Odert, Petra, Oláh, Katalin, Seli, Bálint, Kriskovics, Levente, Greimel, Robert, Görgei, Anna
Flares, sometimes accompanied by coronal mass ejections (CMEs), are the result of sudden changes in the magnetic field of stars with high energy release through magnetic reconnection, which can be observed across a wide range of the electromagnetic s
Externí odkaz:
http://arxiv.org/abs/2407.16446
Autor:
Kővári, Zsolt, Strassmeier, Klaus G., Borkovits, Tamás, Kriskovics, Levente, Oláh, Katalin, Seli, Bálint, Vida, Krisztián
We investigate the magnetic activity of the G dwarf primary star in the multiple system V815 Herculis. Recently, TESS Sector 26 data have revealed that V815 Her is in fact a four-star system consisting of two close binaries in a long-period orbit. We
Externí odkaz:
http://arxiv.org/abs/2212.00558
Publikováno v:
A&A 668, A101 (2022)
Although late-type dwarfs and giant stars are substantially different, their flares are thought to originate in similar physical processes and differ only by a scale factor in the energy levels. We study the validity of this approach. We search for c
Externí odkaz:
http://arxiv.org/abs/2210.09710
Publikováno v:
A&A 650, A138 (2021)
As more exoplanets are being discovered around ultracool dwarfs, understanding their magnetic activity -- and the implications for habitability -- is of prime importance. To find stellar flares and photometric signatures related to starspots, continu
Externí odkaz:
http://arxiv.org/abs/2103.13540
Publikováno v:
In Journal of Experimental Child Psychology February 2024 238
Autor:
Günther, Maximilian N., Berardo, David A., Ducrot, Elsa, Murray, Catriona A., Stassun, Keivan G., Olah, Katalin, Bouma, L. G., Rappaport, Saul, Winn, Joshua N., Feinstein, Adina D., Matthews, Elisabeth C., Sebastian, Daniel, Rackham, Benjamin V., Seli, Bálint, Triaud, Amaury H. M. J., Gillen, Edward, Levine, Alan M., Demory, Brice-Olivier, Gillon, Michaël, Queloz, Didier, Ricker, George, Vanderspek, Roland K., Seager, Sara, Latham, David W., Jenkins, Jon M., Brasseur, C. E., Colón, Knicole D., Daylan, Tansu, Delrez, Laetitia, Fausnaugh, Michael, Garcia, Lionel J., Jayaraman, Rahul, Jehin, Emmanuel, Kristiansen, Martti H., Kruijssen, J. M. Diederik, Pedersen, Peter Philmann, Pozuelos, Francisco J., Rodriguez, Joseph E., Wohler, Bill, Zhan, Zhuchang
New sets of young M dwarfs with complex, sharp-peaked, and strictly periodic photometric modulations have recently been discovered with Kepler/K2 (scallop shells) and TESS (complex rotators). All are part of star-forming associations, are distinct fr
Externí odkaz:
http://arxiv.org/abs/2008.11681
Observations of early-type M stars suggest that there are two characteristic cycle times, one of order one year for fast rotators ($P_{\rm rot} < 1$ day) and another of order four years for slower rotators. For a sample of fast-rotating stars, the eq
Externí odkaz:
http://arxiv.org/abs/1911.13094
Autor:
Vida, Krisztián, Oláh, Katalin, Kővári, Zsolt, van Driel-Gesztelyi, Lidia, Moór, Attila, Pál, András
We analyze the light curve of the M5.5 dwarf Proxima Centauri obtained by the TESS in Sectors 11 and 12. In the $\approx 50$ day-long light curve we identified and analyzed 72 flare events. The flare rate was 1.49 events per day, in total, 7.2% of th
Externí odkaz:
http://arxiv.org/abs/1907.12580
Autor:
Baker, Deborah, van Driel-Gesztelyi, Lidia, Brooks, David H., Valori, Gherardo, James, Alexander W., Laming, J. Martin, Long, David M., Demoulin, Pascal, Green, Lucie M., Matthews, Sarah A., Olah, Katalin, Kovari, Zsolt
Understanding elemental abundance variations in the solar corona provides an insight into how matter and energy flow from the chromosphere into the heliosphere. Observed variations depend on the first ionization potential (FIP) of the main elements o
Externí odkaz:
http://arxiv.org/abs/1902.06948
Autor:
Günther, Maximilian N., Zhan, Zhuchang, Seager, Sara, Rimmer, Paul B., Ranjan, Sukrit, Stassun, Keivan G., Oelkers, Ryan J., Daylan, Tansu, Newton, Elisabeth, Kristiansen, Martti H., Olah, Katalin, Gillen, Edward, Rappaport, Saul, Ricker, George R., Latham, David W., Winn, Joshua N., Jenkins, Jon M., Glidden, Ana, Fausnaugh, Michael, Levine, Alan M., Dittmann, Jason A., Quinn, Samuel N., Krishnamurthy, Akshata, Ting, Eric B.
We perform a study of stellar flares for the 24,809 stars observed with 2 minute cadence during the first two months of the TESS mission. Flares may erode exoplanets' atmospheres and impact their habitability, but might also trigger the genesis of li
Externí odkaz:
http://arxiv.org/abs/1901.00443