Using autoencoders and deep transfer learning to determine the stellar parameters of 286 CARMENES M dwarfs

no code implementations • 14 May 2024 • P. Mas-Buitrago, A. González-Marcos, E. Solano, V. M. Passegger, M. Cortés-Contreras, J. Ordieres-Meré, A. Bello-García, J. A. Caballero, A. Schweitzer, H. M. Tabernero, D. Montes, C. Cifuentes

Our results are broadly consistent with those of recent studies using CARMENES data, with a systematic deviation in our Teff scale towards hotter values for estimations above 3750 K. Furthermore, our methodology mitigates the deviations in metallicity found in previous DL techniques due to the synthetic gap.

Transfer Learning

A Machine Learning approach for correcting radial velocities using physical observables

no code implementations • 30 Jan 2023 • M. Perger, G. Anglada-Escudé, D. Baroch, M. Lafarga, I. Ribas, J. C. Morales, E. Herrero, P. J. Amado, J. R. Barnes, J. A. Caballero, S. V. Jeffers, A. Quirrenbach, A. Reiners

As case studies we use observations of two known stars (Eps Eridani and AUMicroscopii), both with clear signals of activity induced RV variability.

A nearby transiting rocky exoplanet that is suitable for atmospheric investigation

no code implementations • 8 Mar 2021 • T. Trifonov, J. A. Caballero, J. C. Morales, A. Seifahrt, I. Ribas, A. Reiners, J. L. Bean, R. Luque, H. Parviainen, E. Pallé, S. Stock, M. Zechmeister, P. J. Amado, G. Anglada-Escudé3, M. Azzaro, T. Barclay, V. J. S. Béjar, P. Bluhm, N. Casasayas-Barris, C. Cifuentes, K. A. Collins, K. I. Collins, M. Cortés-Contreras, J. de Leon, S. Dreizler, C. D. Dressing, E. Esparza-Borges, N. Espinoza, M. Fausnaugh, A. Fukui, A. P. Hatzes, C. Hellier, Th. Henning, C. E. Henze, E. Herrero, S. V. Jeffers, J. M. Jenkins, E. L. N. Jensen, A. Kaminski, D. Kasper, D. Kossakowski, M. Kürster, M. Lafarga, D. W. Latham, A. W. Mann, K. Molaverdikhani, D. Montes, B. T. Montet, F. Murgas, N. Narita, M. Oshagh, V. M. Passegger, D. Pollacco, S. N. Quinn, A. Quirrenbach, G. R. Ricker, C. Rodríguez López, J. Sanz-Forcada, R. P. Schwarz, A. Schweitzer, S. Seager, A. Shporer, M. Stangret, J. Stürmer, T. G. Tan, P. Tenenbaum, J. D. Twicken, R. Vanderspek, J. N. Winn

The host star is at a distance of ~8. 1 parsecs, has a J-band magnitude of ~7. 2, and is observable from both hemispheres of Earth.

Earth and Planetary Astrophysics

A super-Earth on a close-in orbit around the M1V star GJ 740. A HADES and CARMENES collaboration

no code implementations • 18 Feb 2021 • B. Toledo-Padrón, A. Suárez Mascareño, J. I. González Hernández, R. Rebolo, M. Pinamonti, M. Perger, G. Scandariato, M. Damasso, A. Sozzetti, J. Maldonado, S. Desidera, I. Ribas, G. Micela, L. Affer, E. González-Alvarez, G. Leto, I. Pagano, R. Zanmar Sánchez, P. Giacobbe, E. Herrero, J. C. Morales, P. J. Amado, J. A. Caballero, A. Quirrenbach, A. Reiners, M. Zechmeister

In this work, we perform a spectroscopic and photometric study of one of the program stars (GJ 740), which exhibits a short-period RV signal compatible with a planetary companion.

Time Series Analysis Earth and Planetary Astrophysics Solar and Stellar Astrophysics

A planetary system around the nearby M dwarf Gl 357 including a transiting hot Earth-sized planet optimal for atmospheric characterisation

1 code implementation • 29 Apr 2019 • R. Luque, E. Pallé, D. Kossakowski, S. Dreizler, J. Kemmer, N. Espinoza, G. Anglada-Escudé, V. J. S. Béjar, J. A. Caballero, M. Cortés-Contreras, E. Díez-Alonso, A. Hatzes, C. Hellier, T. Henning, S. V. Jeffers, L. Kaltenegger, M. Kürster, K. Molaverdikhani, D. Montes, N. Narita, G. Nowak, A. Ofir, M. Oshagh, H. Parviainen, A. Quirrenbach, S. Reffert, A. Reiners, C. Rodríguez-López, M. Schlecker, S. Stock, T. Trifonov, M. R. Zapatero Osorio, M. Zechmeister, P. J. Amado, D. R. Anderson, N. E. Batalha, F. F. Bauer, P. Bluhm, C. J. Burke, J. Burt, R. P. Butler, D. A. Caldwell, G. Chen, K. A. Collins, K. I. Collins, J. D. Crane, C. D. Dressing, S. Dynes, F. Feng, J. M. Jenkins, A. Kaminski, H. Klahr, T. Kotani, M. Lafarga, D. W. Latham, S. McDermott, P. Montañés-Rodríguez, J. C. Morales, F. Murgas, E. Nagel, S. Pedraz, I. Ribas, G. R. Ricker, P. Rowden, S. A. Shectman, M. Tamura, J. Teske, J. D. Twicken, S. X. Wang, J. W. Winn, B. Wohler

We report the detection of a transiting Earth-size planet around Gl 357, a nearby M2. 5 V star, using data from the Transiting Exoplanet Survey Satellite (TESS).

Earth and Planetary Astrophysics

Multiple water band detections in the CARMENES near-infrared transmission spectrum of HD 189733 b

no code implementations • 21 Nov 2018 • F. J. Alonso-Floriano, A. Sánchez-López, I. A. G. Snellen, M. López-Puertas, E. Nagel, P. J. Amado, F. F. Bauer, J. A. Caballero, S. Czesla, L. Nortmann, E. Pallé, M. Salz, A. Reiners, I. Ribas, A. Quirrenbach, J. Aceituno, G. Anglada-Escudé, V. J. S. Béjar, E. W. Guenther, T. Henning, A. Kaminski, M. Kürster, M. Lampón, L. M. Lara, D. Montes, J. C. Morales, L. Tal-Or, J. H. M. M. Schmitt, M. R. Zapatero Osorio, M. Zechmeister

The residual spectra were analysed for water absorption with cross-correlation techniques using synthetic atmospheric absorption models.

Earth and Planetary Astrophysics