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Weather in Bologna

Bologna
May 29, 2016, 11:31 am
Fog
Fog
20°C
real feel: 22°C
current pressure: 1010 mb
humidity: 88%
wind speed: 3 m/s W
sunrise: 5:35 am
sunset: 8:50 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

Seminars

Tuesday, May 31st, at 14:00, in Sala Seminari:

 

Margherita Giustini

(SRON, NL)

 

Direct Probe of the Inner Accretion Flow around the Supermassive Black Hole in NGC 2617

 

Abstract

Active Galactic Nuclei (AGN) are powered by mass accretion onto supermassive black holes (SMBHs) residing at the center of galaxies, and are thought to be the manifestation of the co-evolving phase between SMBHs growth and host galaxy formation. Understanding the physics of AGN is therefore crucial to understand not only the physics of SMBHs, but also the evolution of Cosmic structures as a whole. During the past few years we have collected many evidences for matter outflowing from the vicinity of the SMBHs in AGN. However, surprisingly enough, no corresponding direct evidence for inflow of matter has been found yet. The AGN in the low redshift galaxy NGC 2617 (z=0.042) underwent a strong broad-band increase in flux during 2013/14, concurrently switching from being a Seyfert 1.8 to be a Seyfert 1.0 sometimes during the previous 10 years. I will report about the results of the comprehensive spectral and timing analysis of two deep XMM-Newton observations that revealed striking insights about the very inner accretion flow of this AGN. In particular, persistent Fe K absorption redshifted by ~35,000 km/s was solidly detected in both observations: a highly ionised mass inflow has started to be traced in NGC 2617, finally providing direct evidence for matter infall toward the central SMBH. The results of the observational campaign will be discussed in terms of both the general AGN structure and the physical characteristics of the inner accretion/ejection flow around SMBHs.

conferenza alla specola

Conferenze alla Specola

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

Marta Burgay

INAF-Osservatorio Astronomico di Cagliari

“Pulsar e onde gravitazionali”

giovedì 9 giugno 2016 – ore 16

Aula della Specola

via Zamboni 33, Bologna

astrofit2

ASTROFIT2

l’Istituto Nazionale di Astrofisica annuncia la pubblicazione della seconda call del Programma AstroFIt2, Astronomy Fellowships in Italy 2 , cofinanziato dall’INAF e dalla Commissione Europea attraverso il programma Horizon 2020, Azione COFUND, Marie Skłodowska-Curie.

Il bando finanzia 9 assegni di ricerca, ciascuno della durata di 36 mesi, da svolgersi nelle strutture INAF distribuite sul

…→ Read More: astrofit2

Il Transito di Mercurio

Il Transito di Mercurio

9 MAGGIO 2016, da Extraterrestre a Extrasolare: OCCHI SU MERCURIO INAF-Osservatorio Astronomico di Bologna

L’Osservatorio Astronomico di Bologna organizza un’osservazione guidata del transito di Mercurio sul disco solare. Appuntamento lunedì 9 maggio 2016 in piazza VIII Agosto, dalle 13 in poi.

Occhi puntati su

…→ Read More: Il Transito di Mercurio

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