AstroBign†é seminars season 2013-2014
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Last updated by S. Zibetti, Dec. 11th, 2014
High angular resolution and sensitivity are mandatory to study the outflows associated to SINGLE high-mass protostars. First results of a survey employing water maser VLBI and continuum VLA observations are presented.
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I will present SINFONI IFU observation of both "negative" and "positive" feedback in action in an outflowing obscured quasar at z~1.6
I will present results on the dynamics and the onset of the classical bar-mode (m=2) instability in differentially rotating relativistic star models in presence of magnetic fields. The study has been achieved by performing full 3D ideal magneto-hydrodynamics simulations in full General Relativity. Magnetic fields of order 1e14 Gauss, or less, have negligible effetcs on both stable and unstable models, while stronger magnetic fields are able to completely suppress the hydrodinamical instabilities which are present in the un-magnetized case.
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A concise view on some fundamental physical and cosmological arguments uncovered by the polarization of the Cosmic Microwave Background.
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2013 saw the beginning of the commissioning phase of ARGOS at the LBT: the laser system was installed on telescope and the first on-sky propagation was performed. In early 2014 the LGS wavefront sensor was also installed and it saw its first light. I will briefly review this commissioning activity and highlight the results obtained.
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I will talk about the new information that submillimeter/Terahertz observations bring us to the study of protostellar outflows, in particular molecular line observations with APEX, SOFIA, and Herschel observatories.
I will briefly describe the idea and proposal for a low budget, fast track near-IR IFU for LBT, in the context of the recent call for new instrumentation at LBT.
I will talk on the importance of reducing the stray light in solar coronagraphy, i.e., on the design process that allows to minimize the light that survives in the shadow of an occulter. In particular, I will focus on the experimental evaluation of the performance improvement that an optimized coronagraph occulter may guarantee.
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I will present the results of Near-Infrared, high-angular resolution (< 0.1") images of massive young stellar objects obtained with adaptive optics and PISCES at LBT. The jet from IRAS20126+4104, an intermediate mass protostar, is shown with unprecedented details.
I knew Cosmic-Rays during my master on Universe Science at the Universit†à di Roma Tor Vergata, thanks to the professor Marco Tavani. From that moment, my relationship with them started inside the AGILE team. I studied Cosmic-Rays from an experimental point of view, focusing my work on their acceleration by Supernova Remnants. During my PhD I learned to model gamma-ray emission detected from their acceleration, obtaining important improvements of our relationship. My aim in these two post-doc years with the High Energy Team of Pasquale Blasi is to improve my knowledge of Cosmic Rays from a theoretical point of view, in order to learn the better way to behave with them.
Three decades after the discovery of stellar jets many questions about their nature are still open. In recent years the interest of investigators has moved from establishing the structure and propagation modes of these beautiful nebulae toward understanding what is their role in star formation, and lately what is the feedback they can have on circumstellar disk in the region of planet formation. I will illustrate how recent advances in the construction of instruments for high angular resolution can open new prospects in these studies.
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I will present water observations in low-mass protostellar outflows with Herschel, obtained within the framework of the Guaranteed Time Key Project WISH (Water In Star-forming regions with Herschel), in comparison with VLT observations of H2, which indicate a stratification of the molecular gas in velocity and excitation. I will discuss the implications on the water abundance estimates obtained so far and how this new observations can be used to shed a light on this hot topic.
I will discuss a few key issues in protoplanetary disk evolution with emphasis on planet formation. I will highlight some recent successes and the many interesting problems that we hope to sort out in the future with a combination of radio, millimetre and infrared observations.
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Investigating (with the help of Joseph Conrad and Francis Ford Coppola) the deeply obscured protostellar regions.
In this talk I will briefly describe the numerical investigation of non-ideal effects in relativistic plasmas for a couple of cases: the shear viscosity in the Quark-Gluon Plasma (QGP) fireball created after the collision of heavy ions in accelerators, and the mean-field resistive and dynamo effects believed to be at work in accretion tori around Kerr black holes.
I present the Swift X-ray Cluster Survey and its on-going optical follow up, and outline the scientific questions we can (try to) answer studying the galaxy populations in the SWXCS sample.
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Tuesday 28th January 2014 - 11:45 Aula A
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Linda Podio (Star Formation) pdf
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Nicoletta Sanna (Stars/Technology) ppt pdf
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AstroBign†é Home - Top - Current season - Other Seasons
AstroBign†é Home - Top - Current season - Other Seasons
AstroBign†é Home - Top - Current season - Other Seasons
AstroBign†é Home - Top - Current season - Other Seasons
AstroBign†é Home - Top - Current season - Other Seasons