Results 151 to 160 of about 4,740 (197)

Origin of Observed Periodic Components in Astrophysical Masers’ Spectra [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2017
S. Siparov, V. Samodurov, G. Laptev
openaire   +1 more source

The Hubble Constant. [PDF]

open access: yesLiving Rev Relativ, 2015
Jackson N.
europepmc   +1 more source

Thermal Jeans Fragmentation within ~ 1000 AU in OMC-1S. [PDF]

open access: yesAstrophys J, 2018
Palau A   +8 more
europepmc   +1 more source

Optical vortices 30 years on: OAM manipulation from topological charge to multiple singularities. [PDF]

open access: yesLight Sci Appl, 2019
Shen Y   +7 more
europepmc   +1 more source

The Hubble Constant. [PDF]

open access: yesLiving Rev Relativ, 2007
Jackson N.
europepmc   +1 more source

On Parametric Down-Conversion in Astrophysical Masers

open access: yesThe Astrophysical Journal, 1972
Peter Goldreich, John Y. Kwan
openaire   +1 more source

History of Atomic Clocks. [PDF]

open access: yesJ Res Natl Bur Stand (1977), 1983
Ramsey NF.
europepmc   +1 more source

Quasars and active galactic nuclei: high resolution radio imaging. [PDF]

open access: yesProc Natl Acad Sci U S A, 1995
Cohen MH, Kellermann KI.
europepmc   +1 more source

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