Conferències al DAA. Xarrada a càrrec de l'investigador David Martínez Delgado, Zentrum für Astronomie der Universität Heidelberg (Alemanya). Lloc: Seminari del Departament d'Astronomia i Astrofísica, 4a planta de l'Edifici d'Investigació, a Burjassot. Dia: dimecres 2 de març de 2016. Hora: 16:30.
RESUM: (Vore The Astronomical Journal 2010, 140:962–967)
Within the hierarchical framework for galaxy formation, minor merging and tidal interactions are expected to shape all large galaxies to the present day. As a consequence, most seemingly normal disk galaxies should be surrounded by spatially extended stellar “tidal features” of low surface brightness. 
As part of a pilot survey for such interaction signatures, we have carried out ultra deep, wide field imaging of eight isolated spiral galaxies in the Local Volume, with data taken at small (D = 0.1–0.5 m) robotic telescopes that provide exquisite surface brightness sensitivity (μlim(V ) ∼ 28.5 mag arcsec−2). This initial observational effort has led to the discovery of six previously undetected extensive (to ∼30 kpc) stellar structures in the halos surrounding these galaxies, likely debris from tidally disrupted satellites.
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