Zobrazeno 1 - 10
of 10 244
pro vyhledávání: '"A Reiners"'
Autor:
Zhao, Yinan, Dumusque, Xavier, Cretignier, Michael, Moulla, Khaled Al, Ellwarth, Momo, Reiners, Ansgar, Sozzetti, Alessandro
One of the main obstacles in exoplanet detection when using the radial velocity (RV) technique is the presence of stellar activity signal induced by magnetic regions. In this context, a realistic simulated dataset that can provide photometry and spec
Externí odkaz:
http://arxiv.org/abs/2412.13500
Autor:
Cifuentes, C., Caballero, J. A., González-Payo, J., Amado, P. J., Béjar, V. J. S., Burgasser, A. J., Cortés-Contreras, M., Lodieu, N., Montes, D., Quirrenbach, A., Reiners, A., Ribas, I., Sanz-Forcada, J., Seifert, W., Osorio, M. R. Zapatero
Multiplicity studies greatly benefit from focusing on M dwarfs because they are often paired in a variety of configurations with both stellar and substellar objects, including exoplanets. We aim to address the observed multiplicity of M dwarfs by con
Externí odkaz:
http://arxiv.org/abs/2412.12264
Autor:
Ruh, H. L., Zechmeister, M., Reiners, A., Nagel, E., Shan, Y., Cifuentes, C., Jeffers, S. V., Tal-Or, L., Béjar, V. J. S., Amado, P. J., Caballero, J. A., Quirrenbach, A., Ribas, I., Aceituno, J., Hatzes, A. P., Henning, Th., Kaminski, A., Montes, D., Morales, J. C., Schöfer, P., Schweitzer, A., Varas, R.
Publikováno v:
A&A, 692, A138 (2024)
Radial velocity (RV) jitter represents an intrinsic limitation on the precision of Doppler searches for exoplanets that can originate from both instrumental and astrophysical sources. We aim to determine the RV jitter floor in M dwarfs and investigat
Externí odkaz:
http://arxiv.org/abs/2412.07691
Autor:
Lesjak, F., Nortmann, L., Cont, D., Yan, F., Reiners, A., Piskunov, N., Hatzes, A., Boldt-Christmas, L., Czesla, S., Lavail, A., Nagel, E., Rains, A. D., Rengel, M., Seemann, U., Shulyak, D.
The extreme temperature gradients from day- to nightside in the atmospheres of hot Jupiters generate fast winds in the form of equatorial jets or day-to-night flows. Observations of blue-shifted and red-shifted signals in the transmission and dayside
Externí odkaz:
http://arxiv.org/abs/2411.19662
Autor:
Cortés-Contreras, M., Caballero, J. A., Montes, D., Cardona-Guillén, C., Béjar, V. J. S., Cifuentes, C., Tabernero, H. M., Osorio, M. R. Zapatero, Amado, P. J., Jeffers, S. V., Lafarga, M., Lodieu, N., Quirrenbach, A., Reiners, A., Ribas, I., Schöfer, P., Schweitzer, A., Seifert, W.
Aims. Our goals are to characterise the kinematic properties and to identify young and old stars among the M dwarfs of the CARMENES input catalogue. Methods. We compiled the spectral types, proper motions, distances, and radial velocities for 2187 M
Externí odkaz:
http://arxiv.org/abs/2411.06825
Autor:
Kaur, Simranpreet, Viganò, Daniele, Béjar, Víctor J. S., Monge, Álvaro Sánchez, Morata, Òscar, Kansabanik, Devojyoti, Girart, Josep Miquel, Morales, Juan Carlos, Anglada-Escudé, Guillem, Murgas, Felipe, Shan, Yutong, Ilin, Ekaterina, Pérez-Torres, Miguel, Osorio, María Rosa Zapatero, Amado, Pedro J., Caballero, José A., Del Sordo, Fabio, Palle, Enric, Quirrenbach, Andreas, Reiners, Ansgar, Ribas, Ignasi
Publikováno v:
A&A 691, L17 (2024)
Scallop-shell stars, a recently discovered class of young M dwarfs, show complex optical light curves that are characterized by periodic dips as well as other features that are stable over tens to hundreds of rotation cycles. The origin of these feat
Externí odkaz:
http://arxiv.org/abs/2410.22449
Astronomical spectrographs require frequency calibration through sources like hollow-cathode lamps or absorption-gas cells. Laser frequency combs (LFCs) provide highest accuracy but are facing operational challenges. We aim to provide a precise and a
Externí odkaz:
http://arxiv.org/abs/2409.02631
Autor:
Liebing, F., Jeffers, S. V., Gorrini, P., Haswell, C. A., Dreizler, S., Barnes, J. R., Hartogh, C., Koseleva, V., Del Sordo, F., Amado, P. J., Caballero, J. A., López-González, M. J., Morales, N., Reiners, A., Ribas, I., Quirrenbach, A., Rodríguez, E., Tal-Or, L., Tsapras, Y.
Aims. Using HARPS spectroscopic data obtained by the RedDots campaign, as well as archival data from HARPS and CARMENES, supplemented with ASH2 and T90 photometry, we aim to search for additional planets around the three M dwarfs GJ 832, GJ 674, and
Externí odkaz:
http://arxiv.org/abs/2409.01173
Autor:
Dai, Fei, Howard, Andrew W., Halverson, Samuel, Orell-Miquel, Jaume, Palle, Enric, Isaacson, Howard, Fulton, Benjamin, Price, Ellen M., Plotnykov, Mykhaylo, Rogers, Leslie A., Valencia, Diana, Paragas, Kimberly, Greklek-McKeon, Michael, Barrientos, Jonathan Gomez, Knutson, Heather A., Petigura, Erik A., Weiss, Lauren M., Lee, Rena, Brinkman, Casey L., Huber, Daniel, Steffansson, Gudmundur, Masuda, Kento, Giacalone, Steven, Lu, Cicero X., Kite, Edwin S., Hu, Renyu, Gaidos, Eric, Zhang, Michael, Rubenzahl, Ryan A., Winn, Joshua N., Han, Te, Beard, Corey, Holcomb, Rae, Householder, Aaron, Gilbert, Gregory J., Lubin, Jack, Ong, J. M. Joel, Polanski, Alex S., Saunders, Nicholas, Van Zandt, Judah, Yee, Samuel W., Zhang, Jingwen, Zink, Jon, Holden, Bradford, Baker, Ashley, Brodheim, Max, Crossfield, Ian J. M., Deich, William, Edelstein, Jerry, Gibson, Steven R., Hill, Grant M., Jelinsky, Sharon R, Kassis, Marc, Laher, Russ R., Lanclos, Kyle, Lilley, Scott, Payne, Joel N., Rider, Kodi, Robertson, Paul, Roy, Arpita, Schwab, Christian, Shaum, Abby P., Sirk, Martin M., Smith, Chris, Vandenberg, Adam, Walawender, Josh, Wang, Sharon X., Shin-Ywan, Wang, Wishnow, Edward, Wright, Jason T., Yeh, Sherry, Caballero, Jos. A., Morales, Juan C., Murgas, Felipe, Nagel, Evangelos, Reiners, Ansgar, Schweitzer, Andreas, Tabernero, Hugo M., Zechmeister, Mathias, Spencer, Alton, Ciardi, David R., Clark, Catherine A., Lund, Michael B., Caldwell, Douglas A., Collins, Karen A., Schwarz, Richard P., Barkaoui, Khalid, Watkins, Cristilyn N., Shporer, Avi, Narita, Norio, Fukui, Akihiko, Srdoc, Gregor, Latham, David W., Jenkins, Jon M., Ricker, George R., Seager, Sara, Vanderspek, Roland
TOI-6255~b (GJ 4256) is an Earth-sized planet (1.079$\pm0.065$ $R_\oplus$) with an orbital period of only 5.7 hours. With the newly commissioned Keck Planet Finder (KPF) and CARMENES spectrographs, we determined the planet's mass to be 1.44$\pm$0.14
Externí odkaz:
http://arxiv.org/abs/2407.21167
Autor:
Tabernero, H. M., Shan, Y., Caballero, J. A., Duque-Arribas, C., Montes, D., Hernández, J. I. González, Osorio, M. R. Zapatero, Schweitzer, A., Henning, Th., Cortés-Contreras, M., Quirrenbach, A., Amado, P. J., Reiners, A., Ribas, I., Bergond, G., Morales, J. C.
We present the abundances of magnesium (Mg) and silicon (Si) for 314 dwarf stars with spectral types in the interval K7.0-M5.5 (Teff range ~4200-3050 K) observed with the CARMENES high-resolution spectrograph at the 3.5 m telescope at the Calar Alto
Externí odkaz:
http://arxiv.org/abs/2407.19969