Results 1 to 10 of about 6,119 (213)
Blueshift of the surface plasmon resonance in silver nanoparticles studied with EELS [PDF]
Nanophotonics, 2013 We study the surface plasmon (SP) resonance energy of isolated spherical Ag nanoparticles dispersed on a silicon nitride substrate in the diameter range 3.5–26 nm with monochromated electron energy-loss spectroscopy.
Nicolas Stenger +2 more
exaly +3 more sources
Gravitational redshift/blueshift of light emitted by geodesic test particles, frame-dragging and pericentre-shift effects, in the Kerr–Newman–de Sitter and Kerr–Newman black hole geometries [PDF]
European Physical Journal C, 2021 We investigate the redshift and blueshift of light emitted by timelike geodesic particles in orbits around a Kerr–Newman–(anti) de Sitter (KN(a)dS) black hole.
G V Kraniotis
exaly +3 more sources
Convective blueshift strengths for 242 evolved stars [PDF]
A&A 673, A43 (2023), 2023 Context. Extreme precision radial velocity (RV) surveys seeking to detect planets at RV semi-amplitudes of 10 cm/s are facing numerous challenges. One of those challenges is convective blueshift caused by stellar granulation and its suppression through magnetic activity which plays a significant role in hiding planetary signals in stellar jitter. Aims.
Liebing, F. +3 more
arxiv +5 more sources
Blueshifts in the Lemaître -- Tolman models [PDF]
Phys. Rev. D 90, 103525 (2014), 2014 In the Lema\^{\i}tre -- Tolman (L--T) models that have nonconstant bang-time function $t_B(r)$, light emitted close to those points of the Big Bang where $\dril {t_B} r \neq 0$ is blueshifted at the receiver position. The blueshifted rays are expected to perturb the temperature of the cosmic microwave background (CMB) radiation along the lines of sight
arxiv +5 more sources
Testing the Spectroscopic Extraction of Suppression of Convective Blueshift [PDF]
Astrophysical Journal, 2020 Abstract Efforts to detect low-mass exoplanets using stellar radial velocities (RVs) are currently limited by magnetic photospheric activity. Suppression of convective blueshift is the dominant magnetic contribution to RV variability in low-activity Sun-like stars.
T W Milbourne +2 more
exaly +8 more sources
Blueshift without blueshift: Red hole gamma-ray burst models explain the peak energy distribution [PDF]
AIP Conference Proceedings, 2000 Gamma-ray bursts are still a puzzle. In particular, the central engine, the total energy and the very narrow distribution of peak energies challenge model builders. We consider here an extreme model of gamma-ray bursts based on highly red- and blue-shifted positron annihilation radiation.
James S. Graber
openalex +4 more sources
The Blueshift Of Civ Broad Emission Line In Qsos [PDF]
AJ, 157, 148 (2019), 2019 For the sample from Ge et al. of 87 low-$z$ Palomar--Green (PG) quasi-stellar objects (QSOs) and 130 high-$z$ QSOs ($0
Xue Ge +3 more
arxiv +5 more sources
QSO pairsacross active galaxies: Evidence of blueshifts? [PDF]
Journal of Astrophysics and Astronomy, 2006 Several QSO pairs have been reported and their redshifts determined, where the two objects in each pair are located {\it across} an active galaxy. The usually accepted explanation of such occurrences is that the pair is ejected from the active galaxy.
D. Basu
openalex +5 more sources
CFTs blueshift tensor fluctuations universally
Journal of Cosmology and Astroparticle Physics, 2022 Abstract The strong constraints of conformal symmetry cause any nearly-conformal sector to blueshift tensor fluctuations in cosmology. Hidden sectors with approximate conformal symmetry, which may be quite large, are a well-motivated extension of physics beyond the Standard Models of particle physics and cosmology.
Matthew Baumgart +2 more
openalex +4 more sources
Gravitational blueshift from a collapsing object
Physics Letters B, 2015 We discuss a counterintuitive phenomenon of classical general relativity, in which a significant fraction of the radiation emitted by a collapsing object and detected by a distant observer may be blueshifted rather than redshifted.
Lingyao Kong +2 more
doaj +3 more sources