Zobrazeno 1 - 10
of 200
pro vyhledávání: '"Fuhrmeister B"'
Autor:
Sperling, T., Eislöffel, J., Manara, C. F., Campbell-White, J., Schneider, C., Frasca, A., Maucó, K., Siwak, M., Fuhrmeister, B., Lopez, R. Garcia
The main goal of this study is to screen the PENELLOPE/UVES targets for outflow activity and find microjets via spectro-astrometry in, e.g., the [OI]$\lambda$6300 line. In total, 34 T\,Tauri stars of the PENELLOPE survey have been observed with the h
Externí odkaz:
http://arxiv.org/abs/2405.11328
Autor:
Fuhrmeister, B., Czesla, S., Schmitt, J. H. M. M., Schneider, P. C., Caballero, J. A., Jeffers, S. V., Nagel, E., Montes, D., Ortiz, M. C. Gálves, Reinerns, A., Ribas, I., Quirrenbach, A., Amado, P. J., Henning, Th., Lodieu, N., Martín-Fernández, P., Morales, J. C., Schöfer, P., Seifert, W., Zechmeister, M.
Publikováno v:
A&A 678, A1 (2023)
The hydrogen Paschen lines are known activity indicators, but studies of them in M~dwarfs during quiescence are as rare as their reports in flare studies. This situation is mostly caused by a lack of observations, owing to their location in the near-
Externí odkaz:
http://arxiv.org/abs/2308.07685
Publikováno v:
A&A 672, A149 (2023)
$\epsilon$ Eridani is a highly active young K2 star with an activity cycle of about three years established using Ca II H & K line index measurements (S_MWO). This relatively short cycle has been demonstrated to be consistent with X-ray and magnetic
Externí odkaz:
http://arxiv.org/abs/2303.08487
Autor:
Ribas, I., Reiners, A., Zechmeister, M., Caballero, J. A., Morales, J. C., Sabotta, S., Baroch, D., Amado, P. J., Quirrenbach, A., Abril, M., Aceituno, J., Anglada-Escudé, G., Azzaro, M., Barrado, D., Béjar, V. J. S., de Haro, D. Benítez, Bergond, G., Bluhm, P., Ortega, R. Calvo, Guillén, C. Cardona, Chaturvedi, P., Cifuentes, C., Colomé, J., Cont, D., Cortés-Contreras, M., Czesla, S., Díez-Alonso, E., Dreizler, S., Duque-Arribas, C., Espinoza, N., Fernández, M., Fuhrmeister, B., Galadí-Enríquez, D., García-López, A., González-Álvarez, E., Hernández, J. I. González, Guenther, E. W., de Guindos, E., Hatzes, A. P., Henning, Th., Herrero, E., Hintz, D., Huelmo, Á. L., Jeffers, S. V., Johnson, E. N., de Juan, E., Kaminski, A., Kemmer, J., Khaimova, J., Khalafinejad, S., Kossakowski, D., Kürster, M., Labarga, F., Lafarga, M., Lalitha, S., Lampón, M., Lillo-Box, J., Lodieu, N., González, M. J. López, López-Puertas, M., Luque, R., Magán, H., Mancini, L., Marfil, E., Martín, E. L., Martín-Ruiz, S., Molaverdikhani, K., Montes, D., Nagel, E., Nortmann, L., Nowak, G., Pallé, E., Passegger, V. M., Pavlov, A., Pedraz, S., Perdelwitz, V., Perger, M., Ramón-Ballesta, A., Reffert, S., Revilla, D., Rodríguez, E., Rodríguez-López, C., Sadegi, S., Carrasco, M. Á. Sánchez, Sánchez-López, A., Sanz-Forcada, J., Schäfer, S., Schlecker, M., Schmitt, J. H. M. M., Schöfer, P., Schweitzer, A., Seifert, W., Shan, Y., Skrzypinski, S. L., Solano, E., Stahl, O., Stangret, M., Stock, S., Stürmer, J., Tabernero, H. M., Tal-Or, L., Trifonov, T., Vanaverbeke, S., Yan, F., Osorio, M. R. Zapatero
The CARMENES instrument was conceived to deliver high-accuracy radial velocity (RV) measurements with long-term stability to search for temperate rocky planets around a sample of nearby cool stars. The broad wavelength coverage was designed to provid
Externí odkaz:
http://arxiv.org/abs/2302.10528
Autor:
Palle, E., Orell-Miquel, J., Brady, M., Bean, J., Hatzes, A. P., Morello, G., Morales, J. C., Murgas, F., Molaverdikhani, K., Parviainen, H., Sanz-Forcada, J., Béjar, V. J. S., Caballero, J. A., Sreenivas, K. R., Schlecker, M., Ribas, I., Perdelwitz, V., Tal-Or, L., Pérez-Torres, M., Luque, R., Dreizler, S., Fuhrmeister, B., Aceituno, F., Amado, P. J., Anglada-Escudé, G., Caldwell, D. A., Charbonneau, D., Cifuentes, C., de Leon, J. P., Collins, K. A., Dufoer, S., Espinoza, N., Essack, Z., Fukui, A., Chew, Y. Gómez Maqueo, Gómez-Muñoz, M. A., Henning, Th., Herrero, E., Jeffers, S. V., Jenkins, J., Kaminski, A., Kasper, J., Kunimoto, M., Latham, D., Lillo-Box, J., López-González, M. J., Montes, D., Mori, M., Narita, N., Quirrenbach, A., Pedraz, S., Reiners, A., Rodríguez, E., Rodríguez-López, C., Sabin, L., Schanche, N., Schwarz, R-P., Schweitzer, A., Seifahrt, A., Stefansson, G., Sturmer, J., Trifonov, T., Vanaverbeke, S., Wells, R. D., Zapatero-Osorio, M. R., Zechmeister, M.
Publikováno v:
A&A 678, A80 (2023)
One of the main scientific goals of the TESS mission is the discovery of transiting small planets around the closest and brightest stars in the sky. Here, using data from the CARMENES, MAROON-X, and HIRES spectrographs, together with TESS, we report
Externí odkaz:
http://arxiv.org/abs/2301.06873
Autor:
Fuhrmeister, B., Czesla, S., Perdelwitz, V., Nagel, E., Schmitt, J. H. M. M., Jeffers, S. V., Caballero, J. A., Zechmeister, M., Montes, D., Reiners, A., López-Gallifa, Á., Ribas, I., Quirrenbach, A., Amado, P. J., Galadí-Enríquez, D., Béjar, V. J. S., Danielski, C., Hatzes, A. P., Kaminski, A., Kürster, M., Morales, J. C., Osorio, M. R. Zapatero
Publikováno v:
A&A 670, A71 (2023)
It is clearly established that the Sun has an 11-year cycle that is caused by its internal magnetic field. This cycle is also observed in a sample of M dwarfs. In the framework of exoplanet detection or atmospheric characterisation of exoplanets, the
Externí odkaz:
http://arxiv.org/abs/2212.03514
Autor:
Schöfer, P., Jeffers, S. V., Reiners, A., Zechmeister, M., Fuhrmeister, B., Lafarga, M., Ribas, I., Quirrenbach, A., Amado, P. J., Caballero, J. A., Anglada-Escudé, G., Bauer, F. F., Béjar, V. J. S., Cortés-Contreras, M., Alonso, E. Díez, Dreizler, S., Guenther, E. W., Herbort, O., Johnson, E. N., Kaminski, A., Kürster, M., Montes, D., Morales, J. C., Pedraz, S., Tal-Or, L.
Publikováno v:
A&A 663, A68 (2022)
The CARMENES instrument is searching for periodic radial-velocity (RV) variations of M dwarfs, which are induced by orbiting planets. However, there are other potential sources of such variations, including rotational modulation caused by stellar act
Externí odkaz:
http://arxiv.org/abs/2204.11685
Autor:
Fuhrmeister, B., Zisik, A., Schneider, P. C., Robrade, J., Schmitt, J. H. M. M., Predehl, P., Czesla, S., France, K., Muñoz, A. García
The M dwarf Proxima~Centauri is known to be magnetically active and it hosts a likely Earth-like planet in its habitable zone. Understanding the characteristics of stellar radiation by understanding the properties of the emitting plasma is of paramou
Externí odkaz:
http://arxiv.org/abs/2204.09270
Autor:
Reiners, A., Shulyak, D., Käpylä, P. J., Ribas, I., Nagel, E., Zechmeister, M., Caballero, J. A., Shan, Y., Fuhrmeister, B., Quirrenbach, A., Amado, P. J., Montes, D., Jeffers, S. V., Azzaro, M., Béjar, V. J. S., Chaturvedi, P., Henning, Th., Kürster, M., Pallé, E.
Publikováno v:
A&A 662, A41 (2022)
Stellar dynamos generate magnetic fields that are of fundamental importance to the variability and evolution of Sun-like and low-mass stars, and for the development of their planetary systems. We report measurements of surface-average magnetic fields
Externí odkaz:
http://arxiv.org/abs/2204.00342
Autor:
Fuhrmeister, B., Czesla, S., Nagel, E., Reiners, A., Schmitt, J. H. M. M., Jeffers, S. V., Caballero, J. A., Shulyak, D., Johnson, E. N., Zechmeister, M., Montes, D., López-Gallifa, Á., Ribas, I., Quirrenbach, A., Amado, P. J., Galadí-Enríquez, D., Hatzes, A. P., Kürster, M., Danielski, C., Béjar, V. J. S., Kaminski, A., Morales, J. C., Osorio, M. R. Zapatero
Publikováno v:
A&A 657, A125 (2022)
There are several strong K I lines found in the spectra of M dwarfs, among them the doublet near 7700 AA and another doublet near 12 500 AA. We study these optical and near-infrared doublets in a sample of 324 M dwarfs, observed with CARMENES, the hi
Externí odkaz:
http://arxiv.org/abs/2111.01552