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Weather in Bologna

Bologna
May 3, 2016, 4:19 pm
Partly sunny
Partly sunny
23°C
real feel: 26°C
current pressure: 1010 mb
humidity: 40%
wind speed: 2 m/s ESE
sunrise: 6:02 am
sunset: 8:22 pm
 

Welcome to the Bologna Astronomical Observatory

DSCN3816b

 

              Photo by Roberto di Luca with Nikon p520, The G. D. Cassini telescope – in the foreground the sun model

Thursday Seminars

Thursday, May 5th, at 14:00, in Sala Seminari:

 

Ivan Cabrera-Ziri

(ESO, Garching, DE & LJMU, Liverpool, UK)

 

Latest constraints on the formation of globular clusters from young massive clusters

 

Abstract

Studies during the last decade have revealed that nearly all Globular Clusters (GCs) host multiple populations (MPs) of stars with a distinctive chemical patterns in light elements. No evidence of such MPs has been found so far in lower-mass (<10^4 Msun) open clusters nor in intermediate age (1-2 Gyr) massive (>10^5 Msun) clusters in the Local Group. Young massive clusters (YMCs) have masses and densities similar to those expected of young GCs in the early universe, hence they are ideal places to test GC formation theories.

For this talk, first we will review the constraints on GC formation scenarios obtained from studies of YMCs. Then we will present a new technique devised to look for chemical anomalies, i.e. MPs, within YMCs using their integrated light, and show the results of this technique. And finally we will discuss the recent results by Li et al. (2016), who claimed to have found evidence for multiple generations of stars in three intermediate age clusters in the Large and Small Magellanic Clouds (LMC/SMC). We show that the claimed ‘younger stars’ are part of the field population, and not likely to be physically associated with the clusters. We conclude that all proposed models for the origin of MPs are at odds with observations of YMCs.

conferenze alla specola

Incontri mensili di divulgazione astronomica promossi da Museo della Specola · Dipartimento di Fisica e Astronomia Osservatorio Astronomico di Bologna · INAF

Maurizio Spurio

Dipartimento di Fisica e Astronomia-Alma Mater Studiorum-Università di Bologna

Il cielo visto con i neutrini

giovedì 5 maggio 2016 – ore 16

Aula della Specola via Zamboni 33

Leggere l’universo con il Mulino

mulino

conferenze alla specola

Incontri mensili di divulgazione astronomica promossi da Museo della Specola · Dipartimento di Fisica e Astronomia Osservatorio Astronomico di Bologna · INAF

Alberto Cappi

INAF-Osservatorio Astronomico di Bologna “Il redshift-L’affascinante storia e le sorprendenti implicazioni del fenomeno alla base della cosmologia moderna”

giovedì 7 aprile 2016 – ore 16

Aula della Specola via Zamboni 33,

…→ Read More: conferenze alla specola

Giornata dei Planetari

Giornata dei planetari

Domenica 13 marzo 2016. In occasione della giornata nazionale dei Planetari, apertura straordinaria del Planetario di Loiano con lo spettacolo “Il cielo del mese” alle 16.00 e alle 17.00.

Due spettacoli gratuiti alle ore 16.00 e alle ore 17.00.

Solo su prenotazione: www.sofosdivulgazionedellescienze.it

…→ Read More: Giornata dei Planetari