Search results for " eclipses"
showing 5 items of 5 documents
Die totale Sonnenfinsternis vom 8./21. August 1914 im Baltikum mit populären Erläuterungen dieses Phänomens [Die totale Sonnenfinsternis...im Baltiku…
1914
Spectral analysis of the low-mass X-ray pulsar 4U 1822-371: Reflection component in a high-inclination system
2021
Context. The X-ray source 4U 1822-371 is an eclipsing low-mass X-ray binary and X-ray pulsar, hosting a NS that shows periodic pulsations in the X-ray band with a period of 0.59 s. The inclination angle of the system is so high (80–85°) that in principle, it should be hard to observe both the direct thermal emission of the central object and the reflection component of the spectrum because they are hidden by the outer edge of the accretion disc. Despite the number of studies carried out on this source, many aspects such as the geometry of the system, its luminosity, and its spectral features are still debated. Aims. Assuming that the source accretes at the Eddington limit, the analysis perf…
Lucrezio e Carlo Magno. A proposito dell’epistola di Dungal sulle eclissi (MGH Epistolae IV Karolini aevi II, pp. 570-578)
2021
It is generally assumed that Lucretius’ De Rerum Natura disappeared with the end of antiquity and did not reappear until Poggio Bracciolini’s rediscovery (1417). Yet, the oldest and most valuable manuscripts of DRN were copied in the Carolingian age and reflect a high degree of attention to Lucretius’ text and its content. In the present paper, I argue that by studying more carefully the origin and diffusion of Lucretian manuscripts in Carolingian Europe, it is possible to detect an almost unrecognized connection between textual tradition, grammatical erudition, and literary imitatio. In the first section, I offer an overview of the reception of DRN in such representative ninth-century writ…
Accretion onto Neutron Stars: spectral and timing investigation of Low Mass X-ray Binaries
2021
La città di Alphabet. Architettura per prosumers.
2021
Attraverso alcuni aspetti salienti dell’ideazione, della produzione e dell’opposizione al progetto del Toronto Quayside di Sidewalk labs, l’articolo discute l’influenza delle infrastrutture digitali per l’informazione sul progetto della casa e del quartiere. L’ampliamento delle attività svolte da remoto nello spazio domestico, enfatizzato dal quotidiano della pandemia da Covid 19, costituisce per gli oligopolisti planetari degli urban data come Alphabet un utile volano pubblicitario e un acceleratore. La fusione dei nuovi vessilli della tecnoemancipazione e della sostenibilità in ipotesi sperimentali che mirano a costruirsi sia per intero che per parti realizza un nuovo orizzonte in cui lo …