Searching for chameleon-like scalar fields with the ammonia method

2010/08/06 by S. A. Levshakov, A. V. Lapinov, А. В. Лапинов +5 · 3 citations
Physics and Astronomy · #Ammonia #Astro and Planetary Science #Astrophysics #Astrophysics and Star Formation Studies #Atomic physics #Context (archaeology) #Electron #Galaxy #Milky Way #Nuclear physics #Physics #Scalar (mathematics) #Stellar, planetary, and galactic studies #astro-ph.CO

paper · pdf · doi:10.1051/0004-6361/201015332

published as Astronomy & Astrophysics, v. 524, A32 (2010) · 14 pages, 5 figures, 6 tables. Accepted for publication in Astronomy and Astrophysics

arxiv created 2010/08/06 · openalex publication_date 2010/08/19 · arxiv updated 2015/06/11 · openalex created_date 2022/10/04 · openalex updated_date 2026/07/31

Abstract

Context. In our previous work we found a statistically significant offset ΔV ≈ 27 m s-1 between the radial velocities of the HC3N J = 2−1 and NH3 (J,K) = (1,1) transitions observed in molecular cores from the Milky Way. This may indicate that the electron-to-proton mass ratio, μ ≡ me/mp, increases by ~3 × 10-8 when measured under interstellar conditions with matter densities of more than 10 orders of magnitude lower than with laboratory (terrestrial) environments.

Citations

• Probing the Evolutionary Status of Starless Cores through N2H+and N2D+Observations
• Strong Limit on a Variable Proton-to-Electron Mass Ratio from Molecules in the Distant Universe
• A survey for dense cores in dark clouds
• Submillimeter water and ammonia absorption by the peculiarz≈0.89 interstellar medium in the gravitational lens of the PKS 1830-211 system
• SQCD inflation & SUSY breaking
• The cosmological constant and dark energy
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Ultracold molecules: new probes on the variation of fundamental constants
• Sensitivity of microwave spectra of deuterated ammonia to variation of electron-to-proton mass ratio
• IV.—On Least Squares and Linear Combination of Observations

Cited by

• New bounds on macroscopic scalar-field topological defects from nontransient signatures due to environmental dependence and spatial variations of the fundamental constants
• Sensitivity of the isotopologues of hydronium to variation of the electron-to-proton mass ratio
• Chameleon induced atomic afterglow