Información del autor
Autor Caballero, J. A. |
Documentos disponibles escritos por este autor (34)
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Ivanov, M. V ; Antonov, A. N. ; Megías, G. D. ; Caballero, J. A. ; Bárbaro, M. B. ; Amaro, J. E. ; Ruiz Simo, I. ; Donnelly, T. W. ; Udías Moinelo, José Manuel | American Physical Society | 2019-01-10A detailed study of charged current quasielastic neutrino and antineutrino scattering cross sections on a C-12 target with no pions in the final state is presented. The initial nucleus is described by means of a realistic spectral function S(p, [...]![]()
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Caballero, J. A. ; Cabrera Lavers, A. ; García Álvarez, D ; Pascual Ramírez, Sergio | EDP Sciencies | 2012-10Context. Although many studies have been performed so far, there are still dozens of low-mass stars and brown dwarfs in the young ? Orionis open cluster without detailed spectroscopic characterisation. Aims. We look for unknown strong accretors [...]![]()
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Caballero, J. A. ; Burgos, A. de ; Alonso Floriano, F.J. ; Cabrera Lavers, A. ; García Álvarez, D. ; Montes Gutiérrez, David | EDP Sciencies | 2019-09Context. Only a few open clusters are as important for the study of stellar and substellar objects, and their formation and evolution, as the young ? Orionis cluster. However, a complete spectroscopic characterisation of its whole stellar popula[...]![]()
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The search for Earth-like planets around late-type stars using ultrastable spectrographs requires a very precise characterization of the stellar activity and the magnetic cycle of the star, since these phenomena induce radial velocity (RV) signa[...]![]()
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Gómez Marfil, Emilio ; Tabernero, H.M. ; Montes Gutiérrez, David ; Caballero, J. A. ; Soto, M.G. ; González Hernández, J. I. ; Kaminski, A. ; Nagel, E. ; Jeffers, S.V. ; Reiners, A. ; Ribas, I. ; Quirrenbach, A. ; Amado, P.J. | Oxford University Press. | 2020-03With the purpose of assessing classic spectroscopic methods on high-resolution and high signal-to-noise ratio spectra in the near-infrared wavelength region, we selected a sample of 65 F-, G-, and K-type stars observed with CARMENES, the new, ul[...]![]()
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Superscaling in electron-nucleus scattering and its link to CC and NC QE neutrino-nucleus scattering
Bárbaro, M. B. ; Amaro, J. E. ; Caballero, J. A. ; Donnelly, T. W. ; González Jiménez, R. ; Ivanov, M. ; Udías Moinelo, José Manuel | Amer Inst Physics | 2015The superscaling approach (SuSA) to neutrino-nucleus scattering, based on the assumed universality of the scaling function for electromagnetic and weak interactions, is reviewed. The predictions of the SuSA model for bot CC and NC differential a[...]![]()
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Caballero, J. A. ; Cortés Contreras, Miriam ; Díez Alonso, Enrique ; Domínguez Fernández, A.J. ; Montes Gutiérrez, David | EDP Sciencies | 2020-04-07Context. The nearby ultra-compact multiplanetary system YZ Ceti consists of at least three planets, and a fourth tentative signal. The orbital period of each planet is the subject of discussion in the literature due to strong aliasing in the rad[...]![]()
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Although M dwarfs are known for high levels of stellar activity, they are ideal targets for the search of low-mass exoplanets with the radial velocity (RV) method. We report the discovery of a planetary-mass companion around LSPM J2116+0234 (M3.[...]![]()
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Schweitzer, A. ; Passegger, V.M: ; Cifuentes, C. ; Béjar, V.J.S. ; Cortés Contreras, Miriam ; Caballero, J. A. ; Burgo, C. del ; Czesla, S. ; Kürster, M. ; Montes, D. ; Zapatero Osorio, M.R. ; Ribas, I. ; Reiners, A. ; Quirrenbach, A. ; Amado, P.J. ; Aceituno, J. ; Anglada Escudé, G. ; Bauer, F.F. ; Dreizler, S. ; Jeffers, S.V. ; Guenther, E.W. ; Henning, T. ; Kaminski, A. ; Lafarga, M. ; Marfil, E. ; Morales, J.C. ; Schmitt, J.H.M.M. ; Seifert, W. ; Solano, E. ; Tabernero, H.M. ; Zechmeister, M. | EDP SCIENCES S A | 2019-05Aims. We determine the radii and masses of 293 nearby, bright M dwarfs of the CARMENES survey. This is the first time that such a large and homogeneous high-resolution (R > 80, 000) spectroscopic survey has been used to derive these fundamental[...]![]()
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Caballero, J. A. ; Cortés Contreras, Miriam ; Domínguez Fernández, A.J. ; Montes Gutiérrez, David | EDP Sciencies | 2020-02-04We have corrected an error in Passegger et al. (2019) in the calculation of the stellar surface gravity log g from literature masses and radii provided by Gaidos & Mann (2014) and Mann et al. (2015).![]()
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Caballero, J. A. ; Cortés Contreras, Miriam ; Domínguez Fernández, A.J. ; Montes Gutiérrez, David | EDP Sciencies | 2019-07-17We present precise photospheric parameters of 282 M dwarfs determined from fitting the most recent version of PHOENIX models to high-resolution CARMENES spectra in the visible (0.52–0.96 µm) and NIR wavelength range (0.96–1.71 µm). With its aim [...]![]()
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Context. For years, the standard procedure to measure radial velocities (RVs) of spectral observations consisted in cross-correlating the spectra with a binary mask, that is, a simple stellar template that contains information on the position an[...]![]()
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The CARMENES search for exoplanets around M dwarfs A super-Earth planet orbiting HD 79211 (GJ 338 B)
Aims. We report on radial velocity time series for two M0.0 V stars, GJ 338 B and GJ 338 A, using the CARMENES spectrograph, complemented by ground-telescope photometry from Las Cumbres and Sierra Nevada observatories. We aim to explore the pres[...]![]()
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Sanz Forcada, J. ; Caballero, J. A. ; Cortés Contreras, Miriam ; Montes Gutiérrez, David | EDP Sciencies | 2019-11-25The He I infrared (IR) triplet at 10 830 Å is an important activity indicator for the Sun and in solar-type stars, however, it has rarely been studied in relation to M dwarfs to date. In this study, we use the time-averaged spectra of 319 single[...]![]()
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We announce the discovery of two planets orbiting the M dwarfs GJ 251 (0.360 ± 0.015 M?) and HD 238090 (0.578 ± 0.021 M?) based on CARMENES radial velocity (RV) data. In addition, we independently confirm with CARMENES data the existence of Lala[...]