Calendar

Feb
12
mer
Visita-prova ESPIN2020
Feb 12@9:30–13:00
Seminario: Darius Modirrousta Galian (UNIPA), 12 Febbraio 2020 ore 15:00 Aula OAPA
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.
Feb
13
gio
Olimpiadi di Astronomia Junior 1
Feb 13@13:00–20:00
Feb
14
ven
Olimpiadi di Astronomia – Junior 2 e Senior
Feb 14@13:00–20:00
Feb
19
mer
Seminario: S. Sciortino (INAF), ore 14:30 Aula Osservatorio
Feb 19@14:30–16:00

Speaker: Salvatore Sciortino (INAF)

Titolo: A prototype Palermo- Wavelet Detection Code for the
ATHENA WFI: investigating the effect on detection of telescope (or lack of) baffle
and other new challenges posed by very deep exposures of a large area telescope

Abstract:

I will discuss the motivations for and the initial results of a prototype
version of the so-called Pwedetect code for the Athena WFI.  I will discuss the
use of this prototype for assessing the effect of stray-light in the detection
of weak sources with Athena and results from an on-going extensive set of
simulations that have already pinpoint some of the new challenges that the WFI
poses with respect to the past and current generation of X-ray imaging detectors.

Feb
20
gio
Visite al Museo – Esperienza Insegna
Feb 20@8:30–13:30
SEMINARIO: Ileana Chinnici (INAF – OAPa) – Aula Osservatorio ore 15
Feb 20@15:00–16:30

Titolo:

Dalla Società degli Spettroscopisti Italiani alla Società Astronomica Italiana: storia della SAIt

Abstract:

Cent’anni fa, nel 1920, nel corso di una riunione tenutasi all’Accademia dei Lincei, nasceva la Società Astronomica Italiana, come risultato della trasformazione della Società degli Spettroscopisti Italiani. In questo talk saranno ripercorsi i passaggi salienti che hanno portato alla nascita della SAIt, con un breve excursus sui suoi primi cinquant’anni di vita.

Feb
21
ven
Visite al Museo – Esperienza Insegna
Feb 21@8:30–13:30
Mar
2
lun
Tirocinio UNIPA – Restauro beni culturali @ Museo della Specola
Mar 2@8:30–18:30
Sessione Repository INAF – I Gruppo @ Aula OAPA
Mar 2@12:00–13:00
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