Fundamental physics with ESPRESSO: Precise limit on variations in the fine-structure constant towards the bright quasar HE 0515\(-\)4414

The strong intervening absorption system at redshift 1.15 towards the very bright quasar HE 0515\(-\)4414 is the most studied absorber for measuring possible cosmological variations in the fine-structure constant, \(\alpha\). We observed HE 0515\(-\)4414 for 16.1\(\,\)h with the Very Large Telescope...

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Veröffentlicht in:	arXiv.org 2021-12
Hauptverfasser:	Murphy, Michael T, Molaro, Paolo, Leite, Ana C O, Cupani, Guido, Cristiani, Stefano, D'Odorico, Valentina, Ricardo Génova Santos, Carlos J A P Martins, Milaković, Dinko, Nunes, Nelson J, Schmidt, Tobias M, Pepe, Francesco A, Rebolo, Rafael, Santos, Nuno C, Sousa, Sérgio G, Maria-Rosa Zapatero Osorio, Amate, Manuel, Adibekyan, Vardan, Alibert, Yann, Carlos Allende Prieto, Baldini, Veronica, Benz, Willy, Bouchy, François, Cabral, Alexandre, Dekker, Hans, Paolo Di Marcantonio, Ehrenreich, David, Figueira, Pedro, González Hernández, Jonay I, Landoni, Marco, Lovis, Christophe, Gaspare Lo Curto, Manescau, Antonio, Mégevand, Denis, Mehner, Andrea, Micela, Giuseppina, Pasquini, Luca, Poretti, Ennio, Riva, Marco, Sozzetti, Alessandro, Alejandro Suárez Mascareño, Udry, Stéphane, Zerbi, Filippo
Format:	Artikel
Sprache:	eng
Schlagworte:	Absorbers Absorption Algorithms Calibration Coffee Human bias Parameter estimation Physics - Cosmology and Nongalactic Astrophysics Quasars Red shift Resolution Spectrographs Statistical methods Systematic errors Very Large Telescope
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