Zobrazeno 1 - 10
of 579
pro vyhledávání: '"Pérez-Villegas A."'
Autor:
Souza, Stefano O., Valentini, Marica, Chiappini, Cristina, Pérez-Villegas, Angeles, Montalbán, Josefina, Bossini, Diego, Barbuy, Beatriz, Elsworth, Yvonne, Garcia, Rafael A.
The Galactic bulge hosts the Milky Way's oldest stars, possibly coming from disrupted globular clusters (GCs) or the bulge's primordial building blocks, making these stars witnesses to the Galaxy's early chemical enrichment. The Galactic bar currentl
Externí odkaz:
http://arxiv.org/abs/2411.08096
The innermost region of the Milky Way harbors the central molecular zone (CMZ). This region contains a large amount of molecular gas but a poor star formation rate considering the densities achieved by the gas in this region. We used the arepo code t
Externí odkaz:
http://arxiv.org/abs/2411.05684
The long-term evolution of the outer Solar System is subject to the influence of the giant planets, however, perturbations from other massive bodies located in the region imprint secular signatures, that are discernible in long-term simulations. In t
Externí odkaz:
http://arxiv.org/abs/2410.16570
Autor:
Barbuy, B., Friaça, A. C. S., Ernandes, H., da Silva, P., Souza, S. O., Fernández-Trincado, J. G., Cunha, K., Smith, V. V., Masseron, T., Pérez-Villegas, A., Chiappini, C., Queiroz, A. B. A., Santiago, B. X., Beers, T. C., Anders, F., Schiavon, R. P., Valentini, M., Minniti, D., Geisler, D., Souto, D., Placco, V. M., Zoccali, M., Feltzing, S., Schultheis, M., Nitschelm, C.
Stars presently identified in the bulge spheroid are probably very old, and their abundances can be interpreted as due to the fast chemical enrichment of the early Galactic bulge. The abundances of the iron-peak elements are important tracers of nucl
Externí odkaz:
http://arxiv.org/abs/2410.13751
Autor:
Sánchez-Sanjuán, Sergio, Hernández, Jesús, Pérez-Villegas, Ángeles, Román-Zúñiga, Carlos, Aguilar, Luis, Ballesteros-Paredes, Javier, Bonilla-Barroso, Andrea
In this work, we analysed young stellar clusters with spatial and kinematic coherence in the Orion star-forming complex. For this study, we selected a sample of pre-main sequence candidates using parallaxes, proper motions and positions on the colour
Externí odkaz:
http://arxiv.org/abs/2409.09206
Autor:
Souza, S. O., Libralato, M., Nardiello, D., Kerber, L. O., Ortolani, S., Pérez-Villegas, A., Oliveira, R. A. P., Barbuy, B., Bica, E., Griggio, M., Dias, B.
NGC~6558 is a low-galactic latitude globular cluster projected in the direction of the Galactic bulge. Due to high reddening, this region presents challenges in deriving accurate parameters, which require meticulous photometric analysis. We present a
Externí odkaz:
http://arxiv.org/abs/2407.15918
Autor:
Parisi, M. C., Oliveira, R. A. P., Angelo, M., Dias, B., Maia, F., Saroon, S., Feinstein, C., Santos Jr., J. F. C., Bica, E., Ferreira, B. Pereira Lima, Fernández-Trincado, J. G., Westera, P., Minniti, D., Garro, E. R., Santrich, O. J. Katime, De Bortoli, B., Souza, S., Kerber, L., Pérez-Villegas, A.
The structure of the Small Magellanic Cloud (SMC) outside of its main body is characterised by tidal branches resulting from its interactions mainly with the Large Magellanic Cloud (LMC). Characterising the stellar populations in these tidal componen
Externí odkaz:
http://arxiv.org/abs/2312.09756
Autor:
Moreno-Hilario, Elizabeth, Martinez-Medina, Luis A., Li, Hui, Souza, Stefano O., Pérez-Villegas, Angeles
Dwarf galaxies are known to exhibit an unusual richness in numbers of globular clusters (GCs), property quantified by the specific frequency ($S_N$), which is high for dwarf and giant elliptical galaxies, but with a minimum for intermediate-mass gala
Externí odkaz:
http://arxiv.org/abs/2310.17396
Autor:
Borbolato, Lais, Perottoni, Hélio D., Rossi, Silvia, Limberg, Guilherme, Pérez-Villegas, Angeles, Anders, Friedrich, Antoja, Teresa, Laporte, Chervin F. P., Rocha-Pinto, Helio J., Santucci, Rafael M.
We explore the kinematic and chemical properties of Monoceros stellar overdensity by combining data from 2MASS, WISE, APOGEE, and $\text{Gaia}$. Monoceros is a structure located towards the Galactic anticenter and close to the disk. We identified tha
Externí odkaz:
http://arxiv.org/abs/2309.15321
Autor:
Oliveira, R. A. P., Maia, F. F. S., Barbuy, B., Dias, B., Santos Jr., J. F. C., Souza, S. O., Kerber, L. O., Bica, E., Sanmartim, D., Quint, B., Fraga, L., Armond, T., Minniti, D., Parisi, M. C., Santrich, O. J. Katime, Angelo, M. S., Pérez-Villegas, A., De Bórtoli, B. J.
The formation scenario of the Magellanic Bridge during an encounter between the Large and Small Magellanic Clouds $\sim200\,$Myr ago, as proposed by $N$-body models, would be imprinted in the chemical enrichment and kinematics of its stars, and sites
Externí odkaz:
http://arxiv.org/abs/2306.05503