Search Results - "Czesla, S."

Detecting Planets Around Very Low Mass Stars with the Radial Velocity Method by Reiners, A, Bean, J. L, Huber, K. F, Dreizler, S, Seifahrt, A, Czesla, S

“…The detection of planets around very low-mass stars with the radial velocity (RV) method is hampered by the fact that these stars are very faint at optical…”
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A highly mutually inclined compact warm-Jupiter system KOI-984? by Sun, L, Ioannidis, P, Gu, S, Schmitt, J H M M, Wang, X, Kouwenhoven, M B N, Perdelwitz, V, Flammini Dotti, F, Czesla, S

“…ABSTRACT The discovery of a population of close-orbiting giant planets (≤ 1 au) has raised a number of questions about their origins and dynamical histories…”
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The PEPSI Exoplanet Transit Survey (PETS) – V. New Na  d transmission spectra indicate a quieter atmosphere on HD 189733b by Keles, E, Czesla, S, Poppenhaeger, K, Hauschildt, P, Carroll, T A, Ilyin, I, Baratella, M, Steffen, M, Strassmeier, K G, Bonomo, A S, Gaudi, B S, Henning, T, Johnson, M C, Molaverdikhani, K, Nascimbeni, V, Patience, J, Reiners, A, Scandariato, G, Schlawin, E, Shkolnik, E, Sicilia, D, Sozzetti, A, Mallonn, M, Veillet, C, Wang, J, Yan, F

“…ABSTRACT Absorption lines from exoplanet atmospheres observed in transmission allow us to study atmospheric characteristics such as winds. We present a new…”
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TIGRE: A new robotic spectroscopy telescope at Guanajuato, Mexico by Schmitt, J. H. M. M., Schröder, K.-P., Rauw, G., Hempelmann, A., Mittag, M., González-Pérez, J. N., Czesla, S., Wolter, U., Jack, D., Eenens, P., Trinidad, M. A.

“…TIGRE is a new robotic spectroscopy telescope located in central Mexico at the La Luz Observatory of the University of Guanajuato. The 1.2 m telescope is…”
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YETI observations of the young transiting planet candidate CVSO 30 b by Raetz, St, Schmidt, T. O. B., Czesla, S., Klocová, T., Holmes, L., Errmann, R., Kitze, M., Fernández, M., Sota, A., Briceño, C., Hernández, J., Downes, J. J., Dimitrov, D. P., Kjurkchieva, D., Radeva, V., Wu, Z.-Y., Zhou, X., Takahashi, H., Henych, T., Seeliger, M., Mugrauer, M., Adam, Ch, Marka, C., Schmidt, J. G., Hohle, M. M., Ginski, Ch, Pribulla, T., Trepl, L., Moualla, M., Pawellek, N., Gelszinnis, J., Buder, S., Masda, S., Maciejewski, G., Neuhäuser, R.

“…CVSO 30 is a unique young low-mass system, because, for the first time, a close-in transiting and a wide directly imaged planet candidates are found around a…”
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Detection of radial velocity variability of HD 16673 with TIGRE by Mittag, M., Hempelmann, A., Fuhrmeister, B., Czesla, S., Schmitt, J. H. M. M.

“…During our TIGRE activity monitoring of late‐type stars, large radial velocity (RV) variations in the F‐type star HD 16673 were noticed. An automatic pipeline…”
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Hamburger Sternwarte plate archives: Historic long‐term variability study of active galaxies based on digitized photographic plates by Wertz, M., Horns, D., Groote, D., Tuvikene, T., Czesla, S., Schmitt, J. H. M. M.

“…Background At the Hamburger Sternwarte, an effort was started in 2010 with the aim of digitizing its more than 45,000 photographic plates and films stored in…”
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Stellar differential rotation in theory and observation by Czesla, S., Arlt, R., Bonanno, A., Strassmeier, K.G., Huber, K.F.

“…Stellar differential rotation is intimately related to the stellar magnetic dynamo and, thus, to stellar activity. In recent years, significant progress in the…”
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A multi-wavelength view of the multiple activity cycles of $\epsilon$~Eridani by Fuhrmeister, B, Coffaro, M, Stelzer, B, Mittag, M, Czesla, S, Schneider, P. C

“…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…”
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The SRG/eROSITA all-sky survey -- Identifying the coronal content with HamStar by Freund, S, Czesla, S, Predehl, P, Robrade, J, Salvato, M, Schneider, P. C, Starck, H, Wolf, J, Schmitt, J. H. M. M

“…The first eROSITA all-sky survey (eRASS1) performed on board the Spectrum-Roentgen-Gamma mission (SRG) provides more than 900,000 X-ray sources in the 0.2 -…”
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''Forbidden" stars in the eROSITA all-sky survey: X-ray emission from very late-type giants by Schmitt, J. H. M. M, Hünsch, M, Schneider, P. C, Freund, S, Czesla, S, Robrade, J, Schwope, A

“…A&A 688, A9 (2024) We present the results of the first X-ray all-sky survey (eRASS1) performed by the eROSITA instrument onboard the Spectrum-Roentgen-Gamma…”
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Exploring the ultra-hot Jupiter WASP-178b. Constraints on atmospheric chemistry and dynamics from a joint retrieval of VLT/CRIRES$^+$ and space photometric data by Cont, D, Nortmann, L, Yan, F, Lesjak, F, Czesla, S, Lavail, A, Reiners, A, Piskunov, N, Hatzes, A, Boldt-Christmas, L, Kochukhov, O, Marquart, T, Nagel, E, Rains, A. D, Rengel, M, Seemann, U, Shulyak, D

“…Despite recent progress in the spectroscopic characterization of individual exoplanets, the atmospheres of key ultra-hot Jupiters (UHJs) still lack…”
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CRIRES$^+$ transmission spectroscopy of WASP-127b. Detection of the resolved signatures of a supersonic equatorial jet and cool poles in a hot planet by Nortmann, L, Lesjak, F, Yan, F, Cont, D, Czesla, S, Lavail, A, Rains, A. D, Nagel, E, Boldt-Christmas, L, Hatzes, A, Reiners, A, Piskunov, N, Kochukhov, O, Heiter, U, Shulyak, D, Rengel, M, Seemann, U

“…General circulation models of gas giant exoplanets predict equatorial jets that drive inhomogeneities across the planetary atmosphere. We studied the…”
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eROSITA X-ray scan of the eta Chamaeleontis cluster by Robrade, J, Czesla, S, Freund, S, Schmitt, J. H. M. M, Schneider, P. C

“…The nearby young open cluster eta Chamaeleontis has been observed by eROSITA/SRG during its CalPV phase for 150 ks. The eROSITA data were taken in the…”
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SRG/eROSITA 3D mapping of the ISM using X-ray absorption spectroscopy by Gatuzz, E, Wilms, J, Zainab, A, Freund, S, Schneider, P. C, Robrade, J, Czesla, S, García, J. A, Kallmanınst, T. R

“…A&A 688, A207 (2024) We present a detailed study of the hydrogen density distribution in the local interstellar medium (ISM) using the X-ray absorption…”
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Retrieval of the dayside atmosphere of WASP-43b with CRIRES by Lesjak, F, Nortmann, L, Yan, F, Cont, D, Reiners, A, Piskunov, N, Hatzes, A, Boldt-Christmas, L, Czesla, S, Heiter, U, Kochukhov, O, Lavail, A, Nagel, E, Rains, A. D, Rengel, M, Rodler, F, Seemann, U, Shulyak, D

“…A&A 678, A23 (2023) Accurately estimating the C/O ratio of hot Jupiter atmospheres is a promising pathway towards understanding planet formation and migration,…”
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Detection of Fe and Ti on the dayside of the ultrahot Jupiter MASCARA-1b with CARMENES by Guo, B, Yan, F, Nortmann, L, Cont, D, Reiners, A, Pallé, E, Shulyak, D, Molaverdikhani, K, Henning, Th, Chen, G, Stangret, M, Czesla, S, Lesjak, F, López-Puertas, M, Ribas, I, Quirrenbach, A, Caballero, J. A, Amado, P. J, Blazek, M, Montes, D, Morales, J. C, Nagel, E, Osorio, M. R. Zapatero

“…Ultrahot Jupiters are a type of gaseous exoplanet that orbit extremely close to their host star, resulting in significantly high equilibrium temperatures. In…”
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The PEPSI Exoplanet Transit Survey (PETS). V: New Na D transmission spectra indicate a quieter atmosphere on HD 189733b by Keles, E, Czesla, S, Poppenhaeger, K, Hauschildt, P, Carroll, T. A, Ilyin, I, Baratella, M, Steffen, M, Strassmeier, K. G, Bonomo, A. S, Gaudi, B. S, Henning, T, Johnson, M. C, Molaverdikhani, K, Nascimbeni, V, Patience, J, Reiners, A, Scandariato, G, Schlawin, E, Shkolnik, E, Sicilia, D, Sozzetti, A, Mallonn, M, Veillet, C, Wang, J, Yan, F

“…Absorption lines from exoplanet atmospheres observed in transmission allow us to study atmospheric characteristics such as winds. We present a new…”
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The stellar content of the ROSAT all-sky survey by Freund, S, Czesla, S, Robrade, J, Schneider, P. C, Schmitt, J. H. M. M

“…A&A 664, A105 (2022) We present and apply a method to identify the stellar content of the ROSAT all-sky survey (RASS). We performed a crossmatch between the…”
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The elusive atmosphere of WASP-12 b / High-resolution transmission spectroscopy with CARMENES by Czesla, S, Lampón, M, Cont, D, Lesjak, F, Orell-Miquel, J, Sanz-Forcada, J, Nagel, E, Nortmann, L, Molaverdikhani, K, López-Puertas, M, Yan, F, Quirrenbach, A, Caballero, J. A, Pallé, E, Aceituno, J, Amado, P. J, Henning, Th, Khalafinejad, S, Montes, D, Reiners, A, Ribas, I, Schweitzer, A

“…To date, the hot Jupiter WASP-12 b has been the only planet with confirmed orbital decay. The late F-type host star has been hypothesized to be surrounded by a…”
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