0000000000634530

AUTHOR

Francesco Shankar

showing 3 related works from this author

LeMMINGs - IV. The X-ray properties of a statistically complete sample of the nuclei in active and inactive galaxies from the Palomar sample

2022

All 280 of the statistically complete Palomar sample of nearby ( 20° have been observed at 1.5 GHz as part of the LeMMINGs e-MERLIN legacy survey. Here, we present Chandra X-ray observations of the nuclei of 213 of these galaxies, including a statistically complete sub-set of 113 galaxies in the declination range 40° <δ < 65°. We observed galaxies of all optical spectral types, including ‘active’ galaxies [e.g. low-ionization nuclear emission line regions (LINERs) and Seyferts] and ‘inactive’ galaxies like HII galaxies and absorption line galaxies (ALG). The X-ray flux limit of our survey is 1.65 × 10−14 erg s−1 cm−2 (0.3−10 keV). We detect X-ray emission coincident within 2 arcsec of the n…

PhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Astrofísicaactive [Galaxies]galaxies: activeDoubly ionized oxygenX-rayFluxFOS: Physical sciencesAstronomy and AstrophysicsF500AstrophysicsStellar classificationAstrophysics - Astrophysics of GalaxiesGalaxySpectral linegalaxies [X-rays]X-rays: galaxiesSpace and Planetary ScienceAstrophysics of Galaxies (astro-ph.GA)Astrophysics - High Energy Astrophysical PhenomenaLuminosity function (astronomy)Line (formation)
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LeMMINGs III. The e-MERLIN legacy survey of the Palomar sample: exploring the origin of nuclear radio emission in active and inactive galaxies throug…

2021

Full list of authors: Baldi, R. D.; Williams, D. R. A.; Beswick, R. J.; McHardy, I.; Dullo, B. T.; Knapen, J. H.; Zanisi, L.; Argo, M. K.; Aalto, S.; Alberdi, A.; Baan, W. A.; Bendo, G. J.; Fenech, D. M.; Green, D. A.; Klöckner, H. -R.; Körding, E.; Maccarone, T. J.; Marcaide, J. M.; Mutie, I.; Panessa, F.; Pérez-Torres, M. A.; Romero-Cañizales, C.; Saikia, D. J.; Saikia, P.; Shankar, F.; Spencer, R. E.; Stevens, I. R.; Uttley, P.; Brinks, E.; Corbel, S.; Martí-Vidal, I.; Mundell, C. G.; Pahari, M.; Ward, M. J.

AstrofísicaActive galactic nucleusAstronomyAstrophysics::High Energy Astrophysical Phenomenanuclei [galaxies]jets [galaxies]Doubly ionized oxygenFOS: Physical sciencesAstrophysicsF500Astrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesRadio continuum: galaxiesLuminosityAstrophysical jetSubatomic Physics0103 physical sciencesAstronomy Astrophysics and CosmologyAstrophysics::Solar and Stellar AstrophysicsConnection (algebraic framework)010303 astronomy & astrophysicsAstrophysics::Galaxy AstrophysicsGalaxies: nucleiAstronomia ObservacionsHigh Energy Astrophysical Phenomena (astro-ph.HE)Physics[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]Galaxies: star formation010308 nuclear & particles physicsAstronomy and AstrophysicsGalaxies: activeAstrophysics - Astrophysics of Galaxiesgalaxies [radio continuum]Accretion (astrophysics)Galaxy[SDU]Sciences of the Universe [physics]Meteorology and Atmospheric SciencesSpace and Planetary ScienceGalaxies: jetsAstrophysics of Galaxies (astro-ph.GA)active [galaxies]Production (computer science)star formation [galaxies]Astrophysics - High Energy Astrophysical Phenomena
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A White Paper on keV sterile neutrino Dark Matter

2017

We present a comprehensive review of keV-scale sterile neutrino Dark Matter, collecting views and insights from all disciplines involved - cosmology, astrophysics, nuclear, and particle physics - in each case viewed from both theoretical and experimental/observational perspectives. After reviewing the role of active neutrinos in particle physics, astrophysics, and cosmology, we focus on sterile neutrinos in the context of the Dark Matter puzzle. Here, we first review the physics motivation for sterile neutrino Dark Matter, based on challenges and tensions in purely cold Dark Matter scenarios. We then round out the discussion by critically summarizing all known constraints on sterile neutrin…

AstrofísicaSterile neutrinocosmological modelCold dark mattercosmological neutrinosPhysics beyond the Standard Model[ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph]Dark matter theory01 natural sciencesCosmologyHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)White paperHigh Energy Physics - Phenomenology (hep-ph)X-RAY-EMISSIONMETALLIC MAGNETIC CALORIMETERSQUANTUM-FIELD THEORY[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]neutrino: dark matterCosmological neutrinos; Dark matter experiments; Dark matter theory; Particle physics - cosmology connection010303 astronomy & astrophysicsPhysicsdark matter theorynew physicsDOUBLE-BETA-DECAYhep-phneutrino: sterileCosmological neutrinos; Dark matter experiments; Dark matter theory; Particle physics - cosmology connection; Astronomy and AstrophysicsNuclear & Particles PhysicsHigh Energy Physics - Phenomenologyneutrino: detectorDark matter experimentsparticle physics - cosmology connectionastro-ph.COMILKY-WAY SATELLITESCosmological neutrinos3.5 KEV LINENeutrinoParticle Physics - ExperimentAstrophysics - Cosmology and Nongalactic AstrophysicsParticle physicsAstrophysics and AstronomyCosmology and Nongalactic Astrophysics (astro-ph.CO)astro-ph.GADark matterLY-ALPHA FORESTreviewFOS: Physical sciencesContext (language use)neutrino: productionX-raySettore FIS/05 - Astronomia e Astrofisica[ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex]RIGHT-HANDED NEUTRINOS0103 physical sciencesAstronomical And Space Sciencesnumerical calculationsDark matter experimentXMM-NEWTON OBSERVATIONSneutrino: modelParticle Physics - PhenomenologyDWARF SPHEROIDAL GALAXYCosmologia010308 nuclear & particles physicshep-exdark matter experimentsHigh Energy Physics::PhenomenologyAstronomy and AstrophysicsAtomic Molecular Nuclear Particle And Plasma PhysicsCosmological neutrinoAstrophysics - Astrophysics of Galaxies13. Climate actionAstrophysics of Galaxies (astro-ph.GA)[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]Particle physics - cosmology connection[ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph]High Energy Physics::Experimentneutrino: oscillation[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]Journal of Cosmology and Astroparticle Physics
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