{"paper":{"title":"Revisiting Proxima with ESPRESSO","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM","astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"A. Bianco, A. Cabral, A. Fragoso, A. Manescau, A. Mehner, A. Modigliani, A. Oliveira, A. Segovia, A. Sozzetti, A. Su\\'arez Mascare\\~no, A. Zanutta, B. Delabre, B. Lavie, C. Allende Prieto, C. Broeng, C. Cumani, C. J. A. P. Martins, C. Lovis, C. Maire, D. Alves, D. Ehrenreich, D. M\\'egevand, D. Sosnoswska, E. Mueller, E. Pall\\'e, E. Poretti, E. Redaelli, F. Bouchy, F. Murgas, F. Pepe, F. Tenegi, F. Zerbi, G. Avila, G. Calderone, G. Cupani, G. Lo Curto, G. Micela, G. Pariani, I. Coretti, I. Hughes, J. Coelho, J. I. Gonz\\'alez Hern\\'andez, J. Knusdrtrup, J. Lillo-Box, J. Lizon, J. L. Rasilla, J. P. Faria, K. Ferber, L. Genolet, L. Oggioni, L. Pasquini, M. Abreo, M. Affolter, M. Aliverti, M. Amate, M. A. Monteiro, M. Damasso, M. Genoni, M. J. P. F. G. Monteiro, M. Landoni, M. Moschetti, M. Riva, M. R. Zapatero Osorio, N. C. Santos, N. J. Nunes, O. Iwert, P. Conconi, P. Di Marcantonio, P. Figueira, P. Molaro, P. Santin, P. Santos, P. Span\\`o, R. Allart, R. Cirami, R. G\\'enova Santos, R. Rebolo, S. C. C. Barros, S. Cristiano, S. Deiries, S. Hojjatpanah, S. Santana Tschudi, S. Sousa, S. Udry, T. Bandi, V. Adibekyan, V. Baldini, V. D'Odorico, W. Benz, X. Dumusque, Y. Alibert","submitted_at":"2020-05-25T13:54:37Z","abstract_excerpt":"We aim to confirm the presence of Proxima b using independent measurements obtained with the new ESPRESSO spectrograph, and refine the planetary parameters taking advantage of its improved precision. We analysed 63 spectroscopic ESPRESSO observations of Proxima taken during 2019. We obtained radial velocity measurements with a typical radial velocity photon noise of 26 cm/s. We ran a joint MCMC analysis on the time series of the radial velocity and full-width half maximum of the cross-correlation function to model the planetary and stellar signals present in the data, applying Gaussian process"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.12114","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2005.12114/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}