Vincenzo Antonuccio-Delogu | Istituto Nazionale di Astrofisica (original) (raw)

Papers by Vincenzo Antonuccio-Delogu

Research paper thumbnail of A Wavelet Analysis of the Coma Cluster: Statistics and Morphology

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Research paper thumbnail of A Novel Approach to β-Decay: PANDORA, a New Experimental Setup for Future in-Plasma Measurements

Universe

Theoretical predictions as well as experiments performed at storage rings have shown that the lif... more Theoretical predictions as well as experiments performed at storage rings have shown that the lifetimes of β-radionuclides can change significantly as a function of the ionization state. In this paper we describe an innovative approach, based on the use of a compact plasma trap to emulate selected stellar-like conditions. It has been proposed within the PANDORA project (Plasmas for Astrophysics, Nuclear Decay Observation and Radiation for Archaeometry) with the aim to measure, for the first time in plasma, nuclear β-decay rates of radionuclides involved in nuclear-astrophysics processes. To achieve this task, a compact magnetic plasma trap has been designed to reach the needed plasma densities, temperatures, and charge-states distributions. A multi-diagnostic setup will monitor, on-line, the plasma parameters, which will be correlated with the decay rate of the radionuclides. The latter will be measured through the detection of the γ-rays emitted by the excited daughter nuclei follo...

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Research paper thumbnail of Pareallel N-Body Simulations of LSS Formation

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Research paper thumbnail of Small-Scale-Substructure, Delayed Collapse and the Struicture of X-Ray emission from Clusters of Galaxies

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Research paper thumbnail of A software interface between Parallel Tree- and AMR Hydrocodes

We discuss the problems arising when one tries to create a software interface between a parallel ... more We discuss the problems arising when one tries to create a software interface between a parallel treecode (modelling the collisionless, Dark Matter component) and Adaptive Mesh Refinement (AMR) hydrodynamical schemes (which model the gaseous phases). Such an interface would allow one to perform Nbody/Hydro simulations in those situations where the N-body and hydrodynamical codes are loosely coupled, and the gravitational influence of the dissipative, gaseous component on the DM component can be neglected. We discuss similarities and differences between the treeand AMR hydrocode data structures, restricting ourselves to two particular examples which are widely used in these days: the oct-tree Barnes-Hut and the cartesian structured grid AMR schemes. Finally, we present a simple scheme for such a software interface which we are beginning to use in cosmological simulations.

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Research paper thumbnail of Triggered star-formation in the inner filament of Centaurus A

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Research paper thumbnail of s-processing in AGB Stars Revisited. III. Neutron Captures from MHD Mixing at Different Metallicities and Observational Constraints

The Astrophysical Journal

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Research paper thumbnail of Computational physics

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Research paper thumbnail of Capanic

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Research paper thumbnail of Abell 611

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Research paper thumbnail of Are Low Surface Brightness Discs Young?

We reconsider the problem of the age of the stellar discs of late-type Low Surface Brightness (LS... more We reconsider the problem of the age of the stellar discs of late-type Low Surface Brightness (LSB) galaxies by making use of a new IMF recently derived from numerical fluid dynamical simulations (Padoan, Nordlund and Jones, 1997). While a Miller-Scalo IMF cannot adequately describe the photometric properties of LSBs, when we apply the new Padoan et al. (1997) IMF to

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Research paper thumbnail of Structural properties of dark matter halos

Arxiv preprint astro-ph/ …, 1999

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Research paper thumbnail of A Decline and Fall In the Future of Italian Astronomy?

On May 27th 2010, the Italian astronomical community learned with concern that the National Insti... more On May 27th 2010, the Italian astronomical community learned with concern that the National Institute for Astrophysics (INAF) was going to be suppressed, and that its employees were going to be transferred to the National Research Council (CNR). It was not clear if this applied to ...

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Research paper thumbnail of A Decline and Fall In the Future of Italian Astronomy?

On May 27th 2010, the Italian astronomical community learned with concern that the National Insti... more On May 27th 2010, the Italian astronomical community learned with concern that the National Institute for Astrophysics (INAF) was going to be suppressed, and that its employees were going to be transferred to the National Research Council (CNR). It was not clear if this applied to ...

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Research paper thumbnail of The age of LSB discs

AIP Conference Proceedings, 1997

The UBVRI colors of LSB discs seem to indicate that these galaxies are older than 7 Gyr, and thei... more The UBVRI colors of LSB discs seem to indicate that these galaxies are older than 7 Gyr, and their that mean age is probably about 9 Gyr.

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Research paper thumbnail of Velocity correlation tensor and substructure's statistics around density peaks

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Research paper thumbnail of A model for the formation, evolution and structure of the solar cylinder

Monthly Notices of the Royal Astronomical Society, 1993

... Reidel, Dordrecht, in press Soderblom DR, 1985, AJ, 90,2103 Soderb!om DR, Duncan DK, Johnson ... more ... Reidel, Dordrecht, in press Soderblom DR, 1985, AJ, 90,2103 Soderb!om DR, Duncan DK, Johnson DRH, 1991, ApJ, 375, 722 Sommer-Larsen J., 1991a, MNRAS, 249, 368 Sommer-Larsen J., 1991b, MNRAS, 250, 356 Sommer-Larsen J., Christensen PR, 1989, MNRAS, 239 ...

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Research paper thumbnail of Simulations of the Magnetic Field Structure in the Local Minivoid

Nuclear Physics B - Proceedings Supplements, 2004

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Research paper thumbnail of The collapse of a spherical density perturbation in the presence of dynamical friction

Astronomical & Astrophysical Transactions, 1998

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Research paper thumbnail of Parallel Tree Algorithms for N-body Simulations

Lecture Notes in Computer Science, 1999

1 Astrophysical Observatory of Catania, Citt`a Universitaria, Viale A. Doria 6, I-95125 Catania, ... more 1 Astrophysical Observatory of Catania, Citt`a Universitaria, Viale A. Doria 6, I-95125 Catania, ITALY van@sunct.ct.astro.it,ube@sunct.ct.astro.it 2 Istituto di Astronomia, Universit`a di Catania, Citt`a Universitaria, Viale A. Doria 6, I-95125 Catania, ITALY ...

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Research paper thumbnail of A Wavelet Analysis of the Coma Cluster: Statistics and Morphology

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Research paper thumbnail of A Novel Approach to β-Decay: PANDORA, a New Experimental Setup for Future in-Plasma Measurements

Universe

Theoretical predictions as well as experiments performed at storage rings have shown that the lif... more Theoretical predictions as well as experiments performed at storage rings have shown that the lifetimes of β-radionuclides can change significantly as a function of the ionization state. In this paper we describe an innovative approach, based on the use of a compact plasma trap to emulate selected stellar-like conditions. It has been proposed within the PANDORA project (Plasmas for Astrophysics, Nuclear Decay Observation and Radiation for Archaeometry) with the aim to measure, for the first time in plasma, nuclear β-decay rates of radionuclides involved in nuclear-astrophysics processes. To achieve this task, a compact magnetic plasma trap has been designed to reach the needed plasma densities, temperatures, and charge-states distributions. A multi-diagnostic setup will monitor, on-line, the plasma parameters, which will be correlated with the decay rate of the radionuclides. The latter will be measured through the detection of the γ-rays emitted by the excited daughter nuclei follo...

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Research paper thumbnail of Pareallel N-Body Simulations of LSS Formation

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Research paper thumbnail of Small-Scale-Substructure, Delayed Collapse and the Struicture of X-Ray emission from Clusters of Galaxies

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Research paper thumbnail of A software interface between Parallel Tree- and AMR Hydrocodes

We discuss the problems arising when one tries to create a software interface between a parallel ... more We discuss the problems arising when one tries to create a software interface between a parallel treecode (modelling the collisionless, Dark Matter component) and Adaptive Mesh Refinement (AMR) hydrodynamical schemes (which model the gaseous phases). Such an interface would allow one to perform Nbody/Hydro simulations in those situations where the N-body and hydrodynamical codes are loosely coupled, and the gravitational influence of the dissipative, gaseous component on the DM component can be neglected. We discuss similarities and differences between the treeand AMR hydrocode data structures, restricting ourselves to two particular examples which are widely used in these days: the oct-tree Barnes-Hut and the cartesian structured grid AMR schemes. Finally, we present a simple scheme for such a software interface which we are beginning to use in cosmological simulations.

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Research paper thumbnail of Triggered star-formation in the inner filament of Centaurus A

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Research paper thumbnail of s-processing in AGB Stars Revisited. III. Neutron Captures from MHD Mixing at Different Metallicities and Observational Constraints

The Astrophysical Journal

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Research paper thumbnail of Computational physics

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Capanic

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Research paper thumbnail of Abell 611

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Research paper thumbnail of Are Low Surface Brightness Discs Young?

We reconsider the problem of the age of the stellar discs of late-type Low Surface Brightness (LS... more We reconsider the problem of the age of the stellar discs of late-type Low Surface Brightness (LSB) galaxies by making use of a new IMF recently derived from numerical fluid dynamical simulations (Padoan, Nordlund and Jones, 1997). While a Miller-Scalo IMF cannot adequately describe the photometric properties of LSBs, when we apply the new Padoan et al. (1997) IMF to

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Research paper thumbnail of Structural properties of dark matter halos

Arxiv preprint astro-ph/ …, 1999

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Research paper thumbnail of A Decline and Fall In the Future of Italian Astronomy?

On May 27th 2010, the Italian astronomical community learned with concern that the National Insti... more On May 27th 2010, the Italian astronomical community learned with concern that the National Institute for Astrophysics (INAF) was going to be suppressed, and that its employees were going to be transferred to the National Research Council (CNR). It was not clear if this applied to ...

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Research paper thumbnail of A Decline and Fall In the Future of Italian Astronomy?

On May 27th 2010, the Italian astronomical community learned with concern that the National Insti... more On May 27th 2010, the Italian astronomical community learned with concern that the National Institute for Astrophysics (INAF) was going to be suppressed, and that its employees were going to be transferred to the National Research Council (CNR). It was not clear if this applied to ...

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Research paper thumbnail of The age of LSB discs

AIP Conference Proceedings, 1997

The UBVRI colors of LSB discs seem to indicate that these galaxies are older than 7 Gyr, and thei... more The UBVRI colors of LSB discs seem to indicate that these galaxies are older than 7 Gyr, and their that mean age is probably about 9 Gyr.

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Research paper thumbnail of Velocity correlation tensor and substructure's statistics around density peaks

Bookmarks Related papers MentionsView impact

Research paper thumbnail of A model for the formation, evolution and structure of the solar cylinder

Monthly Notices of the Royal Astronomical Society, 1993

... Reidel, Dordrecht, in press Soderblom DR, 1985, AJ, 90,2103 Soderb!om DR, Duncan DK, Johnson ... more ... Reidel, Dordrecht, in press Soderblom DR, 1985, AJ, 90,2103 Soderb!om DR, Duncan DK, Johnson DRH, 1991, ApJ, 375, 722 Sommer-Larsen J., 1991a, MNRAS, 249, 368 Sommer-Larsen J., 1991b, MNRAS, 250, 356 Sommer-Larsen J., Christensen PR, 1989, MNRAS, 239 ...

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Research paper thumbnail of Simulations of the Magnetic Field Structure in the Local Minivoid

Nuclear Physics B - Proceedings Supplements, 2004

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Research paper thumbnail of The collapse of a spherical density perturbation in the presence of dynamical friction

Astronomical & Astrophysical Transactions, 1998

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Parallel Tree Algorithms for N-body Simulations

Lecture Notes in Computer Science, 1999

1 Astrophysical Observatory of Catania, Citt`a Universitaria, Viale A. Doria 6, I-95125 Catania, ... more 1 Astrophysical Observatory of Catania, Citt`a Universitaria, Viale A. Doria 6, I-95125 Catania, ITALY van@sunct.ct.astro.it,ube@sunct.ct.astro.it 2 Istituto di Astronomia, Universit`a di Catania, Citt`a Universitaria, Viale A. Doria 6, I-95125 Catania, ITALY ...

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