57 citations · 250 across the 12 of their papers we have counts for
6 papers · 1 filter
Getting the model right; an information criterion for spectroscopy
John K. Webb, Chung-Chi Lee, Robert F. Carswell +1
Robust model-fitting to spectroscopic transitions is a requirement across many fields of science. The corrected Akaike and Bayesian information criteria (AICc and BIC) are most fre…
A new era of fine structure constant measurements at high redshift
Dinko Milaković, Chung-Chi Lee, Robert F. Carswell +3
New observations of the quasar HE05154414 have been made using the HARPS spectrograph on the ESO 3.6m telescope, aided by the Laser Frequency Comb (LFC). We present three import…
Artificial intelligence and quasar absorption system modelling; application to fundamental constants at high redshift
Chung-Chi Lee, John K. Webb, R. F. Carswell +1
Exploring the possibility that fundamental constants of Nature might vary temporally or spatially constitutes one of the key science drivers for the European Southern Observatory's…
Four direct measurements of the fine-structure constant 13 billion years ago
Michael R. Wilczynska, John K. Webb, Matthew Bainbridge +14
Observations of the redshift z=7.085 quasar J1120+0641 have been used to search for variations of the fine structure constant, alpha, over the redshift range 5.5 to 7.1. Observatio…
A crucial test for astronomical spectrograph calibration with frequency combs
Rafael A. Probst, Dinko Milaković, Borja Toledo-Padrón +23
Laser frequency combs (LFCs) are well on their way to becoming the next-generation calibration sources for precision astronomical spectroscopy. This development is considered key i…
Precision and consistency of astrocombs
Dinko Milaković, Luca Pasquini, John K Webb +1
Astrocombs are ideal spectrograph calibrators whose limiting precision can be derived using a second, independent, astrocomb system. We therefore analyse data from two astrocombs (…