Calendar

Agenda
Agenda
January – February 2020 Jan – Feb 2020
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Jan
15
Wed
Riunione Programmatica Team Athena @ Museo della Specola
Tickets
Jan 15 @ 9:30 – 18:30
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Categories: Museo
Jan
21
Tue
Visita Sant’Anna per ESPIN2020
Tickets
Jan 21 @ 10:00 – 13:00
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Categories: Museo
Seminario: Elisa Guerriero (UNIPA), aula Osservatorio ore 15:00
Tickets
Jan 21 @ 15:00 – 16:30

Speaker: Elisa Guerriero (UNIPA)

Titolo: Development polishing process for bare aluminum mirrors to ARIEL space mission

Abstract: ARIEL is the 4th medium-class mission of ESA’s Cosmic Vision Programme to see and to study the exoplanets’ atmospheres in VIS/IR. The technical innovation of the project is the use of bare aluminum for the mirrors. This material is light, cheap, and available in large quantities, but difficult to polish because it is not very dense. In this seminar, I will talk about my work at Media Lario S.r.l. for the development of the aluminum polishing process, the critical issues and the results obtained.

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Categories: Aula: Seminario
Jan
22
Wed
Visita Fallen Fruit al Museo
Tickets
Jan 22 @ 15:00 – 16:00
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Categories: Museo
Jan
24
Fri
Visita alternanza Rubino
Tickets
Jan 24 @ 9:00 – 13:00
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Categories: Museo
Sopralluogo per documentazione Ramsden
Tickets
Jan 24 @ 15:00 – 17:00
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Categories: Museo
Jan
28
Tue
Visita Museo_15 pax ca
Tickets
Jan 28 @ 8:30 – 12:00
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Categories: Museo
Jan
31
Fri
CS-INAF@OAPa: seduta a porte chiuse
Tickets
Jan 31 @ 14:30 – 18:30
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Categories: Museo
Feb
12
Wed
Visita-prova ESPIN2020
Tickets
Feb 12 @ 9:30 – 13:00
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Categories: Aula: Riunione Museo
Seminario: Darius Modirrousta Galian (UNIPA), 12 Febbraio 2020 ore 15:00 Aula OAPA
Tickets
Feb 12 @ 15:00 – 16:30

Speaker: Darius Modirrousta Galian (UNIPA)

Titolo: Exploring Super-Earth Surfaces: Albedo of Near-Airless Magma Ocean Planets and Topography

Abstract:

In this paper we propose an analytic function for the bond albedo of an airless or near-airless magma ocean planet (AMOP). We generated multiple 100 m wide 1D fractal surfaces unto which we individually bombarded 10,000 light rays. Using an approximate form of the Fresnel equations we measured how much of the incident light was reflected. Having repeated this algorithm on varying surface roughnesses we find the albedo as a function of the Hurst exponent, the geochemical composition of the magma, and the wavelength. As a proof of concept, we used our model on Kepler-10 b to demonstrate the applicability of our equations. We present the albedos of different lava compositions and multiple tests that can be applied to observational data in order to determine the characteristics of the lava. When applied to Kepler-10 b we show that the high albedo could be caused by a moderately wavy ocean composed of oxidised metallic species such as FeO, Fe2O3, Fe3O4, and some silicates. This would imply that Kepler-10 b is a coreless or near-coreless body. However, since the uncertainty in albedo measurements is large there is a strong degeneracy in the surface composition.
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Categories: Aula: Seminario
January – February 2020 Jan – Feb 2020