Zobrazeno 1 - 10
of 149
pro vyhledávání: '"Marchetti T"'
Autor:
Luna, A., Marchetti, T., Rejkuba, M., Leigh, N. W. C., Alonso-García, J., Navarro, A. Valenzuela, Minniti, D., Smith, L. C.
We search for high-velocity stars in the inner region of the Galactic bulge using a selected sample of red clump stars. Some of those stars might be considered hypervelocity stars (HVSs). Even though the HVSs ejection relies on an interaction with th
Externí odkaz:
http://arxiv.org/abs/2401.05630
Autor:
Marini, E., Dell'Agli, F., Kamath, D., Ventura, P., Mattsson, L., Marchetti, T., García-Hernández, D. A., Carini, R., Fabrizio, M., Tosi, S.
The formation of silicates in circumstellar envelopes of stars evolving through the AGB is still debated given the uncertainties affecting stellar evolution modelling, the description of the dust formation process, and the capability of silicate grai
Externí odkaz:
http://arxiv.org/abs/2301.01647
Publikováno v:
A&A 671, A86 (2023)
The study of post asymptotic giant branch (post-AGB) stars is a valuable tool to study still poorly known aspects of the evolution of the stars through the AGB. This is due to the accurate determination of their surface chemical composition and to th
Externí odkaz:
http://arxiv.org/abs/2211.13029
Autor:
Prudil, Z., Koch-Hansen, A. J, Lemasle, B., Grebel, E. K., Marchetti, T., Hansen, C. J., Crestani, J., Braga, V. F., Bono, G., Chaboyer, B., Fabrizio, M., Dall'Ora, M., Martínez-Vázquez, C. E.
Publikováno v:
A&A 664, A148 (2022)
We report the discovery of high velocity candidates among RR~Lyrae stars found in the Milky Way halo. We identified 9 RR~Lyrae stars with Galactocentric velocities exceeding the local escape velocity based on the assumed Galaxy potential. Based on cl
Externí odkaz:
http://arxiv.org/abs/2206.00417
Following a dynamical encounter with Sgr A*, binaries in the Galactic Centre (GC) can be tidally separated and one member star ejected as a hyper-velocity star (HVS) with a velocity beyond the escape speed of the Milky Way. As GC-born objects located
Externí odkaz:
http://arxiv.org/abs/2110.06813
Autor:
Li, Yin-Bi, Luo, A-Li, Lu, You-Jun, Zhang, Xue-Sen, Li, Jiao, Wang, Rui, Zuo, Fang, Xiang, Maosheng, Ting, Yuan-Sen, Marchetti, T., Li, Shuo, Wang, You-Fen, Zhang, Shuo, Hattori, Kohei, Zhao, Yong-Heng, Zhang, Hua-Wei, Zhao, Gang
In this paper, we report 591 high velocity star candidates (HiVelSCs) selected from over 10 million spectra of the data release seven (DR7) of the Large Sky Area Multi-object Fiber Spectroscopic Telescope and the second Gaia data release, with three-
Externí odkaz:
http://arxiv.org/abs/2011.10206
Hypervelocity stars (HVSs) travel from the Galactic Centre across the dark matter halo of the Milky Way, where they are observed with velocities in excess of the Galactic escape speed. Because of their quasi-radial trajectories, they represent a uniq
Externí odkaz:
http://arxiv.org/abs/1807.04468
We search for the fastest stars in the subset of stars with radial velocity measurements of the second data release (DR2) of the European Space Agency mission Gaia. Starting from the observed positions, parallaxes, proper motions, and radial velociti
Externí odkaz:
http://arxiv.org/abs/1804.10607
Hypervelocity stars (HVSs) are amongst the fastest objects in our Milky Way. These stars are predicted to come from the Galactic center (GC) and travel along unbound orbits across the Galaxy. In the coming years, the ESA satellite Gaia will provide t
Externí odkaz:
http://arxiv.org/abs/1711.11397
Autor:
Marchetti, T., Rossi, E. M., Kordopatis, G., Brown, A. G. A., Rimoldi, A., Starkenburg, E., Youakim, K., Ashley, R.
The paucity of hypervelocity stars (HVSs) known to date has severely hampered their potential to investigate the stellar population of the Galactic Centre and the Galactic Potential. The first Gaia data release gives an opportunity to increase the cu
Externí odkaz:
http://arxiv.org/abs/1704.07990