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The many tones of accretion - to the memory of Tomaso Belloni

7–11 Sept 2026
Cefalù
UTC timezone

Chair persons contacts and LOC contact

Session

Multi-wavelength, Jets & Winds. Session 2.4: Spectral Modelling

9 Sept 2026, 09:20
Cefalù

Cefalù

Cefalù, province of Palermo, Sicily. Sala delle Capriate in the Town Hall (Piazza Duomo).

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  1. 53. A gravitationally redshifted absorption line in the NICER spectrum of 4U 1820–30
    rosario iaria (DiFC - UNIPA)
    09/09/2026, 10:00
    Talk

    We report the detection of a mysterious absorption feature at approximately 3.8 keV in the Neutron star Interior Composition Explorer (NICER) spectrum of the ultracompact low-mass X-ray binary 4U 1820–30. We interpret this feature as a gravitationally redshifted iron absorption line produced in the vicinity of the neutron-star surface. This scenario is supported by the temporal proximity of...

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  2. 49. X-ray reverberation from a ring-like corona
    Fergus Baker (Durham University)
    09/09/2026, 10:15
    Talk

    X-ray reverberation lags probe the light travel time due to relativistic curvature effects in the reflected emission close to black holes, and can be used to measure properties of the accreting system, including the mass of the central compact object. Existing models for X-ray reverberation lags and relativistically blurred reflection spectra are, however, limited by their treatment of coronal...

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