Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Varri, A. L."'
Autor:
Della Croce, A., Dalessandro, E., Livernois, A., Vesperini, E., Fanelli, C., Origlia, L., Bellazzini, M., Oliva, E., Sanna, N., Varri, A. L.
Publikováno v:
A&A 674, A93 (2023)
We report on the identification of a massive ($\sim10^5$ M$_\odot$) sub-structured stellar system in the Galactic Perseus complex likely undergoing hierarchical cluster assembly. Such a system comprises nine star clusters (including the well-known cl
Externí odkaz:
http://arxiv.org/abs/2303.15501
Autor:
Leanza, S., Pallanca, C., Ferraro, F. R., Lanzoni, B., Dalessandro, E., Origlia, L., Mucciarelli, A., Valenti, E., Tiongco, M., Varri, A. L., Vesperini, E.
We present an investigation of the internal kinematic properties of M79 (NGC 1904). Our study is based on radial velocity measurements obtained from the ESO-VLT Multi-Instrument Kinematic Survey (MIKiS) of Galactic globular clusters for more than 170
Externí odkaz:
http://arxiv.org/abs/2203.07294
We present the results of a study aimed at exploring, by means of N-body simulations, the evolution of rotating multi-mass star clusters during the violent relaxation phase, in the presence of a weak external tidal field. We study the implications of
Externí odkaz:
http://arxiv.org/abs/2107.11394
Autor:
Dalessandro, E., Varri, A. L., Tiongco, M., Vesperini, E., Fanelli, C., Mucciarelli, A., Origlia, L., Bellazzini, M., Saracino, S., Oliva, E., Sanna, N., Fabrizio, M., Livernois, A.
We present the first detailed observational picture of a possible ongoing massive cluster hierarchical assembly in the Galactic disk as revealed by the analysis of the stellar full phase-space (3D positions and kinematics and spectro-photometric prop
Externí odkaz:
http://arxiv.org/abs/2101.04133
Autor:
Dalessandro, E., Zocchi, A., Varri, A. L., Mucciarelli, A., Bellazzini, M., Ferraro, F. R., Lanzoni, B., Lapenna, E., Origlia, L.
The Large Magellanic Cloud (LMC) hosts a large number of candidate stellar cluster pairs. Binary stellar clusters provide important clues about cluster formation processes and the evolutionary history of the host galaxy. However, to properly extract
Externí odkaz:
http://arxiv.org/abs/1711.02731
Autor:
Bellini, A., Bianchini, P., Varri, A. L., Anderson, J., Piotto, G., van der Marel, R. P., Vesperini, E., Watkins, L. L.
High-precision proper motions of the globular cluster 47 Tuc have allowed us to measure for the first time the cluster rotation in the plane of the sky and the velocity anisotropy profile from the cluster core out to about 13'. These profiles are cou
Externí odkaz:
http://arxiv.org/abs/1706.08974
Autor:
Cordero, M. J., Hénault-Brunet, V., Pilachowski, C. A., Balbinot, E., Johnson, C. I., Varri, A. L.
We use radial velocities from spectra of giants obtained with the WIYN telescope, coupled with existing chemical abundance measurements of Na and O for the same stars, to probe the presence of kinematic differences among the multiple populations of t
Externí odkaz:
http://arxiv.org/abs/1610.09374
Two-body interactions play a major role in shaping the structural and dynamical properties of globular clusters (GCs) over their long-term evolution. In particular, GCs evolve toward a state of partial energy equipartition that induces a mass-depende
Externí odkaz:
http://arxiv.org/abs/1603.00878
Autor:
Sollima, A., Baumgardt, H., Zocchi, A., Balbinot, E., Gieles, M., Henault-Brunet, V., Varri, A. L.
The structural and dynamical properties of star clusters are generally derived by means of the comparison between steady-state analytic models and the available observables. With the aim of studying the biases of this approach, we fitted different an
Externí odkaz:
http://arxiv.org/abs/1505.02598
Internal rotation is considered to play a major role in the dynamics of some globular clusters. However, in only few cases it has been studied by quantitative application of realistic and physically justified global models. Here we present a dynamica
Externí odkaz:
http://arxiv.org/abs/1305.6025