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9 results on '"P. G., Moroni"'

1. Enhanced electron screening in d(d,p)t for deuterated Ta*

Author

F. RAIOLA, P. MIGLIARDI, G. GYURKY, M. ALIOTTA, A. FORMICOLA, R. BONETTI, C. BROGGINI, L. CAMPAJOLA, P. CORVISIERO, H. COSTANTINI, J. CRUZ, A. D'ONOFRIO, Z. FULOP, G. GERVINO, L. GIALANELLA, A. GUGLIELMETTI, C. GUSTAVINO, IMBRIANI, GIANLUCA, A. P. JESUS, M. JUNKER, R. W. KAVANAGH, P. G. MORONI, A. ORDINE, J. V. PINTO, P. PRATI, ROCA, VINCENZO, J. P. RIBEIRA, D. ROGALLA, C. ROLFS, F. SCHUMANN, D. SCHURMANN, E. SOMORIJAI, F. STRIEDER, F. TERRASI, H. P. TRAUTVETTER AND S. ZAVATARELLI, ROMANO, MARIO, F., Raiola, P., Migliardi, G., Gyurky, M., Aliotta, A., Formicola, R., Bonetti, C., Broggini, L., Campajola, P., Corvisiero, H., Costantini, J., Cruz, A., D'Onofrio, Z., Fulop, G., Gervino, L., Gialanella, A., Guglielmetti, C., Gustavino, Imbriani, Gianluca, A. P., Jesu, M., Junker, R. W., Kavanagh, P. G., Moroni, A., Ordine, J. V., Pinto, P., Prati, Roca, Vincenzo, J. P., Ribeira, D., Rogalla, C., Rolf, Romano, Mario, F., Schumann, D., Schurmann, E., Somorijai, F., Strieder, F., Terrasi, and H. P. TRAUTVETTER AND S., Zavatarelli

Published
2002

2. Pulsation models for the 0.26Mo star mimicking RR Lyrae pulsator. Model survey for the new class of variable stars

Author

Bogumił Pilecki, Paulina Karczmarek, Ksenia Suchomska, Dariusz Graczyk, Ian B. Thompson, Piotr Konorski, Giuseppe Bono, Nicolas Nardetto, P. G. Moroni Prada, Grzegorz Pietrzyński, Wolfgang Gieren, Marek Górski, K. Stępień, and Radosław Smolec

Subjects
Physics, Cepheid variable, Hertzsprung–Russell diagram, Astronomy, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, RR Lyrae variable, Light curve, Radial velocity, symbols.namesake, Stars, Astrophysics - Solar and Stellar Astrophysics, Settore FIS/05 - Astronomia e Astrofisica, Space and Planetary Science, symbols, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, Variable star, Instability strip, Astrophysics::Galaxy Astrophysics, Solar and Stellar Astrophysics (astro-ph.SR)
Abstract

We present non-linear hydrodynamic pulsation models for OGLE-BLG-RRLYR-02792 - a 0.26M_sun pulsator, component of the eclipsing binary system, analysed recently by Pietrzynski et al. The star's light and radial velocity curves mimic that of classical RR Lyrae stars, except for the bump in the middle of the ascending branch of the radial velocity curve. We show that the bump is caused by the 2:1 resonance between the fundamental mode and the second overtone - the same mechanism that causes the Hertzsprung bump progression in classical Cepheids. The models allow to constrain the parameters of the star, in particular to estimate its absolute luminosity (approx 33L_sun) and effective temperature (approx 6970K, close to the blue edge of the instability strip). We conduct a model survey for the new class of low mass pulsators similar to OGLE-BLG-RRLYR-02792 - products of evolution in the binary systems. We compute a grid of models with masses corresponding to half (and less) of the typical mass of RR Lyrae variable, 0.20M_sun, 15 pages, 14 figures, accepted for publication in MNRAS

Published
2013

3. Electron screening effect in the reactions 3He(d,p)4He and d(3He,p)4He, Nucl. Phys. A690(2001)790

Author

M. ALIOTTA, F. RAIOLA, G. GYURKY, A. FORMICOLA, R. BONETTI, C. BROGGINI, L. CAMPAJOLA, P. CORVISIERO, H. COSTANTINI, A. D'ONOFRIO, Z. FULOP, G. GERVINO, L. GIALANELLA, A. GUGLIELMETTI, C. GUSTAVINO, IMBRIANI, GIANLUCA, M. JUNKER, R. W. KAVANAGH, P. G. MORONI, A. ORDINE, P. PRATI, D. ROGALLA, C. ROLFS, M. ROMANO, F. SCHUMANN, E. SOMORIJAI, O. STRANIERO, F. STRIEDER, F. TERRASI, H. P. TRAUTVETTER AND S. ZAVATARELLI, ROCA, VINCENZO, M., Aliotta, F., Raiola, G., Gyurky, A., Formicola, R., Bonetti, C., Broggini, L., Campajola, P., Corvisiero, H., Costantini, A., D'Onofrio, Z., Fulop, G., Gervino, L., Gialanella, A., Guglielmetti, C., Gustavino, Imbriani, Gianluca, M., Junker, R. W., Kavanagh, P. G., Moroni, A., Ordine, P., Prati, Roca, Vincenzo, D., Rogalla, C., Rolf, M., Romano, F., Schumann, E., Somorijai, O., Straniero, F., Strieder, F., Terrasi, and H. P. TRAUTVETTER AND S., Zavatarelli

Published
2001

4. Stopping power of low-energy deuterons in 3He gas

Author

F. RAIOLA, G. GYURKY, M. ALIOTTA, A. FORMICOLA, R. BONETTI, C. BROGGINI, L. CAMPAJOLA, P. CORVISIERO, H. COSTANTINI, A. D'ONOFRIO, Z. FULOP, G. GERVINO, L. GIALANELLA, A. GUGLIELMETTI, C. GUSTAVINO, IMBRIANI, GIANLUCA, M. JUNKER, R. W. KAVANAGH, P. G. MORONI, A. ORDINE, P. PRATI, ROCA, VINCENZO, D. ROGALLA, C. ROLFS, F. SCHUMANN, E. SOMORIJAI, O. STRANIERO, F. STRIEDER, F. TERRASI, H. P. TRAUTVETTER AND S. Z.A.V.A.T.A.R.E.L.L.I., ROMANO, MARIO, F., Raiola, G., Gyurky, M., Aliotta, A., Formicola, R., Bonetti, C., Broggini, L., Campajola, P., Corvisiero, H., Costantini, A., D'Onofrio, Z., Fulop, G., Gervino, L., Gialanella, A., Guglielmetti, C., Gustavino, Imbriani, Gianluca, M., Junker, R. W., Kavanagh, P. G., Moroni, A., Ordine, P., Prati, Roca, Vincenzo, D., Rogalla, C., Rolf, Romano, Mario, F., Schumann, E., Somorijai, O., Straniero, F., Strieder, F., Terrasi, and H. P. TRAUTVETTER AND S. Z. A. V. A. T. A. R. E. L. L., I.

Published
2001

5. Electron screening effect in the reactions 3He(d,p)4He and d(3He,p)4He

Author

M. ALIOTTA, F. RAIOLA, G. GYURKY, A. FORMICOLA, R. BONETTI, C. BROGGINI, L. CAMPAJOLA, P. CORVISIERO, H. COSTANTINI, Z. FULOP, G. GERVINO, L. GIALANELLA, A. GUGLIELMETTI, C. GUSTAVINO, G. IMBRIANI, M. JUNKER, R. W. KAVANAGH, P. G. MORONI, A. ORDINE, P. PRATI, V. ROCA, D. ROGALLA, C. ROLFS, M. ROMANO, F. SCHUMANN, E. SOMORIJAI, O. STRANIERO, F. STRIEDER, TERRASI, Filippo, H. P. TRAUTVETTER, S. ZAVATARELLI, D'ONOFRIO, Antonio, Aliotta, M., Raiola, F., Gyurky, G., Formicola, A., Bonetti, R., Broggini, C., Campajola, L., Corvisiero, P., Costantini, H., D'Onofrio, Antonio, Fulop, Z., Gervino, G., Gialanella, L., Guglielmetti, A., Gustavino, C., Imbriani, G., Junker, M., Kavanagh, R. W., Moroni, P. G., Ordine, A., Prati, P., Roca, V., Rogalla, D., Rolfs, C., Romano, M., Schumann, F., Somorijai, E., Straniero, O., Strieder, F., Terrasi, Filippo, Trautvetter, H. P., and Zavatarelli, S.

Published
2001

6. Stopping power of low-energy deuterons in 3He gas: a threshold effect

Author

F. RAIOLA, G. GYURKY, M. ALIOTTA, A. FORMICOLA, R. BONETTI, C. BROGGINI, L. CAMPAJOLA, P. CORVISIERO, H. COSTANTINI, Z. FULOP, G. GERVINO, L. GIALANELLA, A. GUGLIELMETTI, C. GUSTAVINO, G. IMBRIANI, M. JUNKER, R. W. KAVANAGH, P. G. MORONI, A. ORDINE, P. PRATI, V. ROCA, D. ROGALLA, C. ROLFS, M. ROMANO, F. SCHUMANN, E. SOMORIJAI, O. STRANIERO, F. STRIEDER, TERRASI, Filippo, H. P. TRAUTVETTER, S. ZAVATARELLI, D'ONOFRIO, Antonio, Raiola, F., Gyurky, G., Aliotta, M., Formicola, A., Bonetti, R., Broggini, C., Campajola, L., Corvisiero, P., Costantini, H., D'Onofrio, Antonio, Fulop, Z., Gervino, G., Gialanella, L., Guglielmetti, A., Gustavino, C., Imbriani, G., Junker, M., Kavanagh, R. W., Moroni, P. G., Ordine, A., Prati, P., Roca, V., Rogalla, D., Rolfs, C., Romano, M., Schumann, F., Somorijai, E., Straniero, O., Strieder, F., Terrasi, Filippo, Trautvetter, H. P., and Zavatarelli, S.

Published
2001

7. Pulsation models for the 0.26 M⊙ star mimicking RR Lyrae pulsator. Model survey for the new class of variable stars

Author

Smolec, R., primary, Pietrzyński, G., additional, Graczyk, D., additional, Pilecki, B., additional, Gieren, W., additional, Thompson, I., additional, Stępień, K., additional, Karczmarek, P., additional, Konorski, P., additional, Górski, M., additional, Suchomska, K., additional, Bono, G., additional, Prada, P. G. Moroni, additional, and Nardetto, N., additional

Published
2012
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8. Pulsation models for the 0.26 M⊙ star mimicking RR Lyrae pulsator. Model survey for the new class of variable stars.

Author

Smolec, R., Pietrzyński, G., Graczyk, D., Pilecki, B., Gieren, W., Thompson, I., Stępień, K., Karczmarek, P., Konorski, P., Górski, M., Suchomska, K., Bono, G., Prada, P. G. Moroni, and Nardetto, N.

Subjects
STELLAR oscillations, VARIABLE stars, RR Lyrae stars, HYDRODYNAMICS, STELLAR evolution
Abstract

We present non-linear hydrodynamic pulsation models for OGLE-BLG-RRLYR-02792 – a 0.26 M⊙ pulsator, component of the eclipsing binary system, analysed recently by Pietrzyński et al. The star’s light and radial velocity curves mimic that of classical RR Lyrae stars, except for the bump in the middle of the ascending branch of the radial velocity curve. We show that the bump is caused by the 2:1 resonance between the fundamental mode and the second overtone – the same mechanism that causes the Hertzsprung bump progression in classical Cepheids. The models allow us to constrain the parameters of the star, in particular to estimate its absolute luminosity (≈33 L⊙) and effective temperature (≈6970 K, close to the blue edge of the instability strip).We conduct a model survey for the new class of low-mass pulsators similar to OGLE-BLG-RRLYR-02792 – products of evolution in the binary systems. We compute a grid of models with masses corresponding to half (or less) of the typical mass of RR Lyrae variable, 0.20 ≤ M ≤ 0.30 M⊙, and discuss the properties of the resulting light and radial velocity curves. Resonant bump progression is clear and may be used to distinguish such stars from classical RR Lyrae stars. We present the Fourier decomposition parameters for the modelled light and radial velocity curves. The expected values of the φ31 Fourier phase for the light curves differ significantly from that observed in RR Lyrae stars, which is another discriminant of the new class. [ABSTRACT FROM AUTHOR]

Published
2013
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9. Electron screening effect in the reactions 3He(d,p)4He and d(3He,p)4He

Author

R. Bonetti, Lucio Gialanella, C. Rolfs, Vincenzo Roca, Paolo Prati, M. Junker, Zs. Fülöp, A. Formicola, Mario R. Romano, A. Ordine, Gy. Gyürky, Gianluca Imbriani, Sandra Zavatarelli, H. P. Trautvetter, H. Costantini, P. Corvisiero, G. Gervino, Oscar Straniero, C. Gustavino, Marialuisa Aliotta, P.G. Moroni, Filippo Terrasi, A. Guglielmetti, E. Somorjai, Detlef Rogalla, Antonio D'Onofrio, Frank Strieder, L. Campajola, F. Schümann, Carlo Broggini, F. Raiola, M., Aliotta, F., Raiola, G., Gyurky, A., Formicola, R., Bonetti, C., Broggini, L., Campajola, P., Corvisiero, H., Costantini, A., D'Onofrio, Z., Fulop, G., Gervino, L., Gialanella, A., Guglielmetti, C., Gustavino, Imbriani, Gianluca, M., Junker, R. W., Kavanagh, P. G., Moroni, A., Ordine, P., Prati, Roca, Vincenzo, D., Rogalla, C., Rolf, Romano, Mario, F., Schumann, E., Somorijai, O., Straniero, F., Strieder, F., Terrasi, H. P. TRAUTVETTER AND S. Z. A. V. A. T. A. R. E. L. L., I., G., Gyürky, Z., Fülöp, F., Schümann, E., Somorjai, H. P., Trautvetter, and S., Zavatarelli

Subjects
Experimental Nuclear Physic, Physics, Nuclear physics, Nuclear and High Energy Physics, Electron screening, Screening effect, Nuclear Reactions, Nuclear astrophysics, Electron, Atomic physics, Potential energy, Dissociation (chemistry)
Abstract

The cross section of the reactions 3He(d, p) 4 He and d(3He, p)4He has been measured at the center-of-mass energies E=5 to 60 keV and 10 to 40 keV, respectively. The experiments were performed to determine the magnitude of the electron screening effect leading to the respective electron-screening potential energy U e =219±7 and 109±9 eV, which are both significantly higher than the respective values from atomic physics models, U e =120 and 65 eV.

Published
2001

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