0000000001182499

AUTHOR

E. Falco

showing 5 related works from this author

VLBI imaging of the gravitational lens MGJ0414+0534

2000

6 pages, 3 figures, accepted for publication in Astronomy & Astrophysics.-- Final full-text version of the paper available at: http://aa.springer.de/papers/0362003/2300845.pdf

GeneralLiterature_INTRODUCTORYANDSURVEYAstrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)FOS: Physical sciencesquasars: individual: MGJ0414+0534 [Galaxies]Astrophysics::Cosmology and Extragalactic Astrophysicsgravitational lensing [Cosmology]AstrophysicsGalaxies: jetsTechniques: interferometricComputingMethodologies_DOCUMENTANDTEXTPROCESSINGGalaxies: quasars: individual: MGJ0414+0534interferometric [Techniques]jets [Galaxies]Cosmology: gravitational lensingAstrophysics::Galaxy Astrophysics
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Microlensing of Quasar UV Iron Emission

2013

We measure the differential microlensing of the UV Fe II and Fe III emission line blends between 14 quasar image pairs in 13 gravitational lenses. We find that the UV iron emission is strongly microlensed in 4 cases with amplitudes comparable to that of the continuum. Statistically modeling the magnifications we infer a typical size of r ~ 4*sqrt(M/Msun) light-days for the Fe line emitting regions which is comparable to the size of the region generating the UV continuum (3 ~ 7 light-days). This may indicate that a significant part of the UV Fe II and Fe III emission originates in the quasar accretion disk.

Cosmology and Nongalactic Astrophysics (astro-ph.CO)Astrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesAstrophysics::Earth and Planetary AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Galaxy AstrophysicsAstrophysics - Cosmology and Nongalactic Astrophysics
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ChemInform Abstract: New Acetylenes from Chrysanthemum coronarium L.

1990

The investigation of the aerial parts of Chrysanthemum coronarium yielded, in addition to several known compounds, two new acetylenic sulfoxides 9 and 10, and a new thiophene spiroacetal enol ether 11. Their structures were deduced by spectroscopic and chemical methods.

chemistry.chemical_classificationchemistry.chemical_compoundChemistryChrysanthemum coronariumThiopheneEnol etherOrganic chemistryGeneral MedicineChemInform
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New acetylenes fromChrysanthemum coronarium L.

1990

The investigation of the aerial parts of Chrysanthemum coronarium yielded, in addition to several known compounds, two new acetylenic sulfoxides 9 and 10, and a new thiophene spiroacetal enol ether 11. Their structures were deduced by spectroscopic and chemical methods.

chemistry.chemical_classificationChrysanthemum coronariumStereochemistryOrganic ChemistrySulfoxideNuclear magnetic resonance spectroscopySulfonechemistry.chemical_compoundchemistryEnol etherThiopheneOrganic chemistryMoleculePhysical and Theoretical ChemistryLiebigs Annalen der Chemie
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Microlensing-Based Estimate of the Mass Fraction in Compact Objects in Lens

2009

We estimate the fraction of mass that is composed of compact objects in gravitational lens galaxies. This study is based on microlensing measurements (obtained from the literature) of a sample of 29 quasar image pairs seen through 20 lens galaxies. We determine the baseline for no microlensing magnification between two images from the ratios of emission line fluxes. Relative to this baseline, the ratio between the continua of the two images gives the difference in microlensing magnification. The histogram of observed microlensing events peaks close to no magnification and is concentrated below 0.6 magnitudes, although two events of high magnification, $\Delta m \sim 1.5$, are also present. …

Cosmology and Nongalactic Astrophysics (astro-ph.CO)FOS: Physical sciencesAstrophysics::Earth and Planetary AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Galaxy AstrophysicsAstrophysics - Cosmology and Nongalactic Astrophysics
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