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Welcome to the Bologna Astronomical Observatory

Landscape of Bologna

courtesy of Eugenio Carretta

Conferenza alla Specola

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

Roberto di Luca INAF-Osservatorio Astronomico di Bologna Il Cielo del 2015

giovedì 4 dicembre 2014 – ore 16 Aula della Specola via Zamboni 33, Bologna

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Gaia alerts validation with the Loiano telescope confirms Gaia14aae to be the third known eclipsing AM CVn (a candidate SN Ia progenitor).

gaia14aae_whtspectrum Gaia14aae (ASASSN-14cn) was detected by Gaia on 2014-08-11, during an outburst. Low to intermediate resolution spectra taken at the 4.2m William Herschel Telescope on La Palma, over the  nights of 13-15 October 2014, using ISIS+R300B/R158R and ACAM+V400, show double-peaked He emission lines at z=0, with no H.

Such spectra allowed classification of Gaia14aae as a AM CVn system, a very rare class of object (see Atel 6593). AM CVn systems are ultra-compact, semidetached, white dwarf binaries with periods ranging from…

Call for observing proposals at the 1.52m Cassini Telescope

Proposals may be submitted for the February 1st – July 31st, 2015 semester.

The deadline is December 19th, 2014, at 13:00 UT.…

Positions available at INAF – OABO

 

        No positions available now at Bologna Astronomical Observatory…

Thursday Seminars

Thursday, Nov. 20th at h.14:00, in the seminars’ room (Via Ranzani 1, floor -1):

 Christopher G. Few

(School of Physics, University of Exeter, UK) 

Satellite accretion in thermodynamical simulations of Milky Way-like galaxies   

Abstract

The accepted scenario for the formation of galaxies involves the accretion of satellites, at first hierarchical (forming the spheroid) with later mergers perturbing the disk to varying degrees. The accretion of satellites can trigger dynamical changes in the galactic disk which can be difficult to interpret, …