A long-duration superflare on the K giant HD 251108

Autor: Günther, Hans Moritz, Pasham, Dheeraj, Binks, Alexander, Czesla, Stefan, Enoto, Teruaki, Fausnaugh, Michael, Hambsch, Franz-Josef, Inoue, Shun, Maehara, Hiroyuki, Notsu, Yuta, Robrade, Jan, Schmitt, J. H. M. M., Schneider, P. C.

Many giant stars are magnetically active, which causes rotational variability, chromospheric emission lines, and X-ray emission. Large outbursts in these emission features can set limits on the magnetic field strength and thus constrain the mechanism

Externí odkaz: http://arxiv.org/abs/2410.03616

The high-energy environment of the heavy sub-Earth GJ 367 b indicates likely complete evaporation of its atmosphere

Autor: Poppenhaeger, K., Ketzer, L., Ilic, N., Magaudda, E., Robrade, J., Stelzer, B., Schmitt, J. H. M. M., Schneider, P. C.

Publikováno v: A&A 689, A188 (2024)

The planet GJ 367 b is a recently discovered high-density sub-Earth orbiting an M dwarf star. Its composition was modelled to be predominantly iron with a potential remainder of a hydrogen-helium envelope. Here we report an X-ray detection of this pl

Externí odkaz: http://arxiv.org/abs/2401.17302

The SRG/eROSITA all-sky survey: First X-ray catalogues and data release of the western Galactic hemisphere

Autor: Merloni, A., Lamer, G., Liu, T., Ramos-Ceja, M. E., Brunner, H., Bulbul, E., Dennerl, K., Doroshenko, V., Freyberg, M. J., Friedrich, S., Gatuzz, E., Georgakakis, A., Haberl, F., Igo, Z., Kreykenbohm, I., Liu, A., Maitra, C., Malyali, A., Mayer, M. G. F., Nandra, K., Predehl, P., Robrade, J., Salvato, M., Sanders, J. S., Stewart, I., Tubín-Arenas, D., Weber, P., Wilms, J., Arcodia, R., Artis, E., Aschersleben, J., Avakyan, A., Aydar, C., Bahar, Y. E., Balzer, F., Becker, W., Berger, K., Boller, T., Bornemann, W., Brüggen, M., Brusa, M., Buchner, J., Burwitz, V., Camilloni, F., Clerc, N., Comparat, J., Coutinho, D., Czesla, S., Dannhauer, S. M., Dauner, L., Dauser, T., Dietl, J., Dolag, K., Dwelly, T., Egg, K., Ehl, E., Freund, S., Friedrich, P., Gaida, R., Garrel, C., Ghirardini, V., Gokus, A., Grünwald, G., Grandis, S., Grotova, I., Gruen, D., Gueguen, A., Hämmerich, S., Hamaus, N., Hasinger, G., Haubner, K., Homan, D., Chitham, J. Ider, Joseph, W. M., Joyce, A., König, O., Kaltenbrunner, D. M., Khokhriakova, A., Kink, W., Kirsch, C., Kluge, M., Knies, J., Krippendorf, S., Krumpe, M., Kurpas, J., Li, P., Liu, Z., Locatelli, N., Lorenz, M., Müller, S., Magaudda, E., Mannes, C., McCall, H., Meidinger, N., Michailidis, M., Migkas, K., Muñoz-Giraldo, D., Musiimenta, B., Nguyen-Dang, N. T., Ni, Q., Olechowska, A., Ota, N., Pacaud, F., Pasini, T., Perinati, E., Pires, A. M., Pommranz, C., Ponti, G., Poppenhaeger, K., Pühlhofer, G., Rau, A., Reh, M., Reiprich, T. H., Roster, W., Saeedi, S., Santangelo, A., Sasaki, M., Schmitt, J., Schneider, P. C., Schrabback, T., Schuster, N., Schwope, A., Seppi, R., Serim, M. M., Shreeram, S., Sokolova-Lapa, E., Starck, H., Stelzer, B., Stierhof, J., Suleimanov, V., Tenzer, C., Traulsen, I., Trümper, J., Tsuge, K., Urrutia, T., Veronica, A., Waddell, S. G. H., Willer, R., Wolf, J., Yeung, M. C. H., Zainab, A., Zangrandi, F., Zhang, X., Zhang, Y., Zheng, X.

Publikováno v: A&A, vol. 682, A34 (2024)

The eROSITA telescope array aboard the Spektrum Roentgen Gamma (SRG) satellite began surveying the sky in December 2019, with the aim of producing all-sky X-ray source lists and sky maps of an unprecedented depth. Here we present catalogues of both p

Externí odkaz: http://arxiv.org/abs/2401.17274

Prominence activation, optical flare, and post-flare loops on the RS Canum Venaticorum star SZ Piscium

Autor: Cao, Dongtao, Gu, Shenghong, Ge, Jian, Wang, Tinggui, Zhou, Jilin, Chang, Liang, Wolter, U., Mittag, M., Schmitt, J. H. M. M., Perdelwitz, V.

Publikováno v: Monthly Notices of the Royal Astronomical Society, Volume 482, Issue 1, p.988-998, January 2019

We present the results of time-resolved high-resolution spectroscopic observations of the very active RS Canum Venaticorum (RS CVn) star SZ Piscium (SZ Psc), obtained during two consecutive observing nights on October 24 and 25, 2011. Several optical

Externí odkaz: http://arxiv.org/abs/2401.02590

The CARMENES search for exoplanets around M dwarfs. Telluric absorption corrected high S/N optical and near-infrared template spectra of 382 M dwarf stars

Autor: Nagel, E., Czesla, S., Kaminski, A., Zechmeister, M., Tal-Or, L., Schmitt, J. H. M. M., Reiners, A., Quirrenbach, A., López, A. García, Caballero, J. A., Ribas, I., Amado, P. J., Béjar, V. J. S., Cortés-Contreras, M., Dreizler, S., Hatzes, A. P., Henning, Th., Jeffers, S. V., Kürster, M., Lafarga, M., López-Puertas, M., Montes, D., Morales, J. C., Pedraz, S., Schweitzer, A.

Publikováno v: A&A 680, A73 (2023)

Light from celestial objects interacts with the molecules of the Earth's atmosphere, resulting in the production of telluric absorption lines in ground-based spectral data. Correcting for these lines, which strongly affect red and infrared wavelength

Externí odkaz: http://arxiv.org/abs/2310.14715