Zobrazeno 1 - 10
of 1 711
pro vyhledávání: '"Valente, G"'
Autor:
Murgia, M., Govoni, F., Vacca, V., Loi, F., Feretti, L., Giovannini, G., Melis, A., Concu, R., Carretti, E., Poppi, S., Valente, G., Bonafede, A., Bernardi, G., Boschin, W., Brienza, M., Clarke, T. E., de Gasperin, F., Ensslin, T. A., Ferrari, C., Gastaldello, F., Girardi, M., Gregorini, L., Johnston-Hollitt, M., Orru', E., Parma, P., Perley, R. A., Taylor, G. B, Marchegiani, P.
We present deep total intensity and polarization observations of the Coma cluster at 1.4 and 6.6 GHz performed with the Sardinia Radio Telescope. By combining the single-dish 1.4 GHz data with archival Very Large Array observations we obtain new imag
Externí odkaz:
http://arxiv.org/abs/2402.07306
Autor:
Marongiu, M., Pellizzoni, A., Righini, S., Mulas, S., Nesti, R., Burtovoi, A., Romoli, M., Serra, G., Valente, G., Egron, E., Murtas, G., Iacolina, M. N., Melis, A., Guglielmino, S. L., Loru, S., Zucca, P., Zanichelli, A., Bachetti, M., Bemporad, A., Buffa, F., Concu, R., Deiana, G. L., Karakotia, C., Ladu, A., Maccaferri, A., Marongiu, P., Messerotti, M., Navarrini, A., Orfei, A., Ortu, P., Pili, M., Pisanu, T., Pupillo, G., Romano, P., Saba, A., Schirru, L., Tiburzi, C., Abbo, L., Frassati, F., Giarrusso, M., Jerse, G., Landini, F., Pancrazzi, M., Russano, G., Sasso, C., Susino, R.
One of the most important objectives of solar physics is the physical understanding of the solar atmosphere, the structure of which is also described in terms of the density (N) and temperature (T) distributions of the atmospheric matter. Several mul
Externí odkaz:
http://arxiv.org/abs/2402.07018
Autor:
Marongiu, M., Pellizzoni, A., Mulas, S., Righini, S., Nesti, R., Murtas, G., Egron, E., Iacolina, M. N., Melis, A., Valente, G., Serra, G., Guglielmino, S. L., Zanichelli, A., Romano, P., Loru, S., Bachetti, M., Bemporad, A., Buffa, F., Concu, R., Deiana, G. L., Karakotia, C., Ladu, A., Maccaferri, A., Marongiu, P., Messerotti, M., Navarrini, A., Orfei, A., Ortu, P., Pili, M., Pisanu, T., Pupillo, G., Saba, A., Schirru, L., Tiburzi, C., Zucca, P.
The Sun is an extraordinary workbench, from which several fundamental astronomical parameters can be measured with high precision. Among these parameters, the solar radius $R_{\odot}$ plays an important role in several aspects, such as in evolutionar
Externí odkaz:
http://arxiv.org/abs/2401.13198
Multi-wavelength observations of the lensed quasar PKS 1830$-$211 during the 2019 $\gamma$-ray flare
Autor:
Vercellone, S., Donnarumma, I., Pittori, C., Capitanio, F., De Rosa, A., Di Gesu, L., Kiehlmann, S., Iacolina, M. N., Pellizzoni, P. A., Egron, E., Pacciani, L., Piano, G., Puccetti, S., Righini, S., Valente, G., Verrecchia, F., Vittorini, V., Tavani, M., Brocato, E., Chen, A. W., Hovatta, T., Melis, A., Max-Moerbeck, W., Perrodin, D., Pilia, M., Pili, M., Readhead, A. C. S., Reeves, R., Ridolfi, A., Vitali, F., Bulgarelli, A., Cattaneo, P. W., Lucarelli, F., Morselli, A., Trois, A.
PKS 1830$-$211 is a $\gamma$-ray emitting, high-redshift (z $= 2.507 \pm 0.002$), lensed flat-spectrum radio quasar. During the period mid-February to mid-April 2019, this source underwent a series of strong $\gamma$-ray flares that were detected by
Externí odkaz:
http://arxiv.org/abs/2311.07332
Autor:
Pellizzoni, A., Righini, S., Iacolina, M. N., Marongiu, M., Mulas, S., Murtas, G., Valente, G., Egron, E., Bachetti, M., Buffa, F., Concu, R., Deiana, G. L., Guglielmino, S. L., Ladu, A., Loru, S., Maccaferri, A., Marongiu, P., Melis, A., Navarrini, A., Orfei, A., Ortu, P., Pili, M., Pisanu, T., Pupillo, G., Saba, A., Schirru, L., Serra, G., Tiburzi, C., Zanichelli, A., Zucca, P., Messerotti, M.
We present a new solar radio imaging system implemented through the upgrade of the large single-dish telescopes of the Italian National Institute for Astrophysics (INAF), not originally conceived for solar observations. During the development and ear
Externí odkaz:
http://arxiv.org/abs/2205.00197
Autor:
Moretto, R., Germani, M.M., Borelli, B., Conca, V., Rossini, D., Boraschi, P., Donati, F., Urbani, L., Lonardi, S., Bergamo, F., Cerma, K., Ramondo, G., D’Amico, F.E., Salvatore, L., Valente, G., Barbaro, B., Giuliante, F., Di Maio, M., Masi, G., Cremolini, C.
Publikováno v:
In ESMO Open April 2024 9(4)
We present the application of simultaneous diagonalization and minimum energy (SDME) high-order finite element modal bases for simulation of transient non-linear elastodynamic problem, including impact cases with neo-hookean hyperelastic materials. T
Externí odkaz:
http://arxiv.org/abs/2104.13466
Autor:
Brienza, M., Morganti, R., Murgia, M., Vilchez, N., Adebahr, B., Carretti, E., Concu, R., Govoni, F., Harwood, J., Intema, H., Loi, F., Melis, A., Paladino, R., Poppi, S., Shulevski, A., Vacca, V., Valente, G.
Radio loud Active Galactic Nuclei are episodic in nature, cycling through periods of activity and quiescence. In this work we investigate the duty cycle of the radio galaxy B2~0258+35, which was previously suggested to be a restarted radio galaxy bas
Externí odkaz:
http://arxiv.org/abs/1807.07280
Autor:
Loru, S., Pellizzoni, A., Egron, E., Righini, S., Iacolina, M. N., Mulas, S., Cardillo, M., Marongiu, M., Ricci, R., Bachetti, M., Pilia, M., Trois, A., Ingallinera, A., Petruk, O., Murtas, G., Serra, G., Buffa, F., Concu, R., Gaudiomonte, F., Melis, A., Navarrini, A., Perrodin, D., Valente, G.
The main characteristics in the radio continuum spectra of Supernova Remnants (SNRs) result from simple synchrotron emission. In addition, electron acceleration mechanisms can shape the spectra in specific ways, especially at high radio frequencies.
Externí odkaz:
http://arxiv.org/abs/1805.04376
Autor:
Vacca, V., Murgia, M., Govoni, F., Loi, F., Vazza, F., Finoguenov, A., Carretti, E., Feretti, L., Giovannini, G., Concu, R., Melis, A., Gheller, C., Paladino, R., Poppi, S., Valente, G., Bernardi, G., Boschin, W., Brienza, M., Clarke, T. E., Colafrancesco, S., Ensslin, T. E., Ferrari, C., de Gasperin, F., Gastaldello, F., Girardi, M., Gregorini, L., Johnston-Hollitt, M., Junklewitz, H., Orru, E., Parma, P., Perley, R., Taylor, G. B
We report the detection of diffuse radio emission which might be connected to a large-scale filament of the cosmic web covering a 8deg x 8deg area in the sky, likely associated with a z~0.1 over-density traced by nine massive galaxy clusters. In this
Externí odkaz:
http://arxiv.org/abs/1804.09199