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Fundamental physical constants need not be constant, neither spatially nor temporally.
Quantum Mechanics of One- and Two-Electron Atoms
H. A. Bethe and E. E. Salpeter · 1957
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Moving envelopes of stars
V. V. Sobolev · 1960
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Electron Radiative Transitions in a Coulomb Field
W. J. Karzas and R. Latter · 1961
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Recombination of the Primeval Plasma
P. J. E. Peebles · 1968
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Recombination of Hydrogen in the Hot Model of the Universe
Y. B. Zeldovich, V. G. Kurt, and R. A. Syunyaev · 1968
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Primeval Adiabatic Perturbation in an Expanding Universe
P. J. E. Peebles and J. T. Yu · 1970
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Small-Scale Fluctuations of Relic Radiation
R. A. Sunyaev and Y. B. Zeldovich · 1970
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Hydrogen recombination lines of cosmological origin
V. K. Dubrovich · 1975
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Fine-structure constant: Is it really a constant?
J. D. Bekenstein · 1982
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The time development of a resonance line in the expanding universe
G. B. Rybicki and I. P. dell’Antonio · 1994
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Fossil radio lines of hydrogen in the cosmic background radiation at decimeter and meter wavelengths
V. K. Dubrovich and V. A. Stolyarov · 1995
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Effect of physical assumptions on the calculation of microwave background anisotropies
W. Hu, D. Scott, N. Sugiyama, and M. White · 1995
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Anisotropies in the cosmic microwave background: an analytic approach
W. Hu and N. Sugiyama · 1995
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Small-Scale Cosmological Perturbations: an Analytic Approach
W. Hu and N. Sugiyama · 1996
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Constraining variations in the fine-structure constant with the cosmic microwave background
M. Kaplinghat, R. J. Scherrer, and M. S. Turner · 1999
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A New Calculation of the Recombination Epoch
S. Seager, D. D. Sasselov, and D. Scott · 1999
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Looking for a varying
P. P. Avelino, C. J. A. P. Martins, G. Rocha, and P. Viana · 2000
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Efficient Computation of Cosmic Microwave Background Anisotropies in Closed Friedmann-Robertson-Walker Models
A. Lewis, A. Challinor, and A. Lasenby · 2000
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How Exactly Did the Universe Become Neutral?
S. Seager, D. D. Sasselov, and D. Scott · 2000
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Early-universe constraints on a time-varying fine structure constant
P. P. Avelino, S. Esposito, G. Mangano, C. J. A. P. Martins, A. Melchiorri, G. Miele, O. Pisanti, G. Rocha, and P. T. P. Viana · 2001
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Cosmic concordance and the fine structure constant
R. A. Battye, R. Crittenden, and J. Weller · 2001
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Hydrogen Subordinate Line Emission at the Epoch of Cosmological Recombination
M. S. Burgin · 2003
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The fundamental constants and their variation: observational and theoretical status
J.-P. Uzan · 2003
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WMAP constraints on varying
C. J. A. P. Martins, A. Melchiorri, G. Rocha, R. Trotta, P. P. Avelino, and P. T. P. Viana · 2004
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Measuring
G. Rocha, R. Trotta, C. J. A. P. Martins, A. Melchiorri, P. P. Avelino, R. Bean, and P. T. P. Viana · 2004
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Gravitation and Cosmology
E. E. Kholupenko, A. V. Ivanchik, and D. A. Varshalovich · 2005
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The imprint of cosmological hydrogen recombination lines on the power spectrum of the CMB
J. A. Rubiño-Martín, C. Hernández-Monteagudo, and R. A. Sunyaev · 2005
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Free-bound emission from cosmological hydrogen recombination
J. Chluba and R. A. Sunyaev · 2006
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Induced two-photon decay of the 2s level and the rate of cosmological hydrogen recombination
J. Chluba and R. A. Sunyaev · 2006
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Springer Handbook of Atomic, Molecular, and Optical Physics
G. W. F. Drake · 2006
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The cosmic microwave background and the ionization history of the Universe
A. Lewis, J. Weller, and R. Battye · 2006
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Cosmological hydrogen recombination: Lyn line feedback and continuum escape
J. Chluba and R. A. Sunyaev · 2007
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A Multiplet Table for Neutral Helium (
G. W. F. Drake and D. C. Morton · 2007
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Rapid HeII-HeI recombination and radiation arising from this process
E. E. Kholupenko, A. V. Ivanchik, and D. A. Varshalovich · 2007
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Is there a need and another way to measure the cosmic microwave background temperature more accurately?
J. Chluba and R. A. Sunyaev · 2008
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Two-photon transitions in primordial hydrogen recombination
C. M. Hirata · 2008
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The eleventh and twelfth data releases of the sloan digital sky survey: Final data from sdss-iii
S. Alam, F. D. Albareti, C. A. Prieto, F. Anders, S. F. Anderson, T. Anderton, B. H. Andrews, E. Armengaud, A. Aubourg, S. Bailey, and et al · 2015
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Detecting the cosmological recombination signal from space
V. Desjacques, J. Chluba, J. Silk, F. de Bernardis, and O. Doré · 2015
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Evolution of the fine-structure constant in runaway dilaton models
C. J. A. P. Martins, P. E. Vielzeuf, M. Martinelli, E. Calabrese, and S. Pandolfi · 2015
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Planck 2015 results. XIII. Cosmological parameters
Planck Collaboration, P. A. R. Ade, N. Aghanim, M. Arnaud, M. Ashdown, J. Aumont, C. Baccigalupi, A. J. Banday, R. B. Barreiro, J. G. Bartlett, and et al · 2015
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On the Detection of Spectral Ripples from the Recombination Epoch
M. Sathyanarayana Rao, R. Subrahmanyan, N. Udaya Shankar, and J. Chluba · 2015
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Frequency ratio of al+ and hg+ single-ion optical clocks; metrology at the 17th decimal place
T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, and J. C. Bergquist · 2008
Cited alongside, same era.
Lines in the cosmic microwave background spectrum from the epoch of cosmological helium recombination
J. A. Rubiño-Martín, J. Chluba, and R. A. Sunyaev · 2008
Cited alongside, same era.
How well do we understand cosmological recombination?
W. Y. Wong, A. Moss, and D. Scott · 2008
Cited alongside, same era.
Time-dependent corrections to the Ly
J. Chluba and R. A. Sunyaev · 2009
Cited alongside, same era.
RICO: A New Approach for Fast and Accurate Representation of the Cosmological Recombination History
W. A. Fendt, J. Chluba, J. A. Rubiño-Martín, and B. D. Wandelt · 2009
Cited alongside, same era.
CMB polarization features from inflation versus reionization
M. J. Mortonson, C. Dvorkin, H. V. Peiris, and W. Hu · 2009
Cited alongside, same era.
COSMOSPEC: fast and detailed computation of the cosmological recombination radiation from hydrogen and helium
J. Chluba and Y. Ali-Haïmoud · 2016
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Curvature constraints from large scale structure
E. Di Dio, F. Montanari, A. Raccanelli, R. Durrer, M. Kamionkowski, and J. Lesgourgues · 2016
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Foreground Bias from Parametric Models of Far-IR Dust Emission
A. Kogut and D. J. Fixsen · 2016
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High-precision limit on variation in the fine-structure constant from a single quasar absorption system
S. M. Kotuš, M. T. Murphy, and R. F. Carswell · 2017
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The status of varying constants: a review of the physics, searches and implications
C. J. A. P. Martins · 2017
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New constraints on time-dependent variations of fundamental constants using planck data
L. Hart and J. Chluba · 2018
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Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics beyond
A. G. Riess, S. Casertano, W. Yuan, L. M. Macri, and D. Scolnic · 2019
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Probing spatial variation of the fine-structure constant using the CMB
T. L. Smith, D. Grin, D. Robinson, and D. Qi · 2019
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Improved model-independent constraints on the recombination era and development of a direct projection method
L. Hart and J. Chluba · 2020
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Updated fundamental constant constraints from Planck 2018 data and possible relations to the Hubble tension
L. Hart and J. Chluba · 2020
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Sensitivity forecasts for the cosmological recombination radiation in the presence of foregrounds
L. Hart, A. Rotti, and J. Chluba · 2020
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Relieving the Hubble tension with primordial magnetic fields
K. Jedamzik and L. Pogosian · 2020
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New horizons in cosmology with spectral distortions of the cosmic microwave background
J. Chluba, M. H. Abitbol, N. Aghanim, Y. Ali-Haïmoud, M. Alvarez, K. Basu, B. Bolliet, C. Burigana, P. de Bernardis, J. Delabrouille, E. Dimastrogiovanni, F. Finelli, D. Fixsen, L. Hart, C. Hernández-Monteagudo, J. C. Hill, A. Kogut, K. Kohri, J. Lesgourgues, B. Maffei, J. Mather, S. Mukherjee, S. P. Patil, A. Ravenni, M. Remazeilles, A. Rotti, J. A. Rubiño-Martin, J. Silk, R. A. Sunyaev, and E. R. Switzer · 2021
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Early recombination as a solution to the H
T. Sekiguchi and T. Takahashi · 2021
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Consistency of Planck, ACT, and SPT constraints on magnetically assisted recombination and forecasts for future experiments
S. Galli, L. Pogosian, K. Jedamzik, and L. Balkenhol · 2022
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Varying fundamental constants principal component analysis: additional hints about the Hubble tension
L. Hart and J. Chluba · 2022
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Using the cosmological recombination radiation to probe early dark energy and fundamental constant variations
L. Hart and J. Chluba · 2023
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Electron mass variation from dark sector interactions and compatibility with cosmological observations
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Primordial magnetic fields and the Hubble tension
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What It Takes to Solve the Hubble Tension through Modifications of Cosmological Recombination
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Resolving the Hubble tension at late times with Dark Energy
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