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Fundamental physics with ESPRESSO: Precise limit on variations in the fine-structure constant towards the bright quasar HE 05154414
Michael T. Murphy, Paolo Molaro, Ana C. O. Leite +40
The strong intervening absorption system at redshift 1.15 towards the very bright quasar HE 05154414 is the most studied absorber for measuring possible cosmological variations…
Near-infrared spectroscopy of extreme BAL QSOs from the QUBRICS bright quasar survey
Guido Cupani, Giorgio Calderone, Pierluigi Selvelli +8
We report on the spectral confirmation of 18 QSO candidates from the "QUasars as BRIght beacons for Cosmology in the Southern hemisphere'' survey (QUBRICS), previously observed in…
Measuring the Density Fields around Bright Quasars at with XQR-30 Spectra
Huanqing Chen, Anna-Christina Eilers, Sarah E. I. Bosman +10
Measuring the density of the intergalactic medium using quasar sightlines in the epoch of reionization is challenging due to the saturation of Lyman- absorption. Near a luminous…
Chasing the Tail of Cosmic Reionization with Dark Gap Statistics in the Ly Forest over
Yongda Zhu, George D. Becker, Sarah E. I. Bosman +14
We present a new investigation of the intergalactic medium (IGM) near the end of reionization using "dark gaps" in the Lyman-alpha (Ly) forest. Using spectra of 55 QSOs at $z_{\…
Warm terrestrial planet with half the mass of Venus transiting a nearby star
Olivier D. S. Demangeon, M. R. Zapatero Osorio, Y. Alibert +42
The advent of a new generation of radial velocity instruments has allowed us to break the one Earth-mass barrier. We report a new milestone in this context with the detection of th…
Hydrogen reionisation ends by : Lyman- optical depth measured by the XQR-30 sample
Sarah E. I. Bosman, Frederick B. Davies, George D. Becker +23
The presence of excess scatter in the Ly- forest at , together with the existence of sporadic extended opaque Gunn-Peterson troughs, has started to provide robust evi…