Zobrazeno 1 - 10
of 379
pro vyhledávání: '"Mateu, C"'
Autor:
Ramos, P., Antoja, T., Yuan, Z., Arentsen, A., Oria, P. -A., Famaey, B., Ibata, R., Mateu, C., Carballo-Bello, J. A.
Publikováno v:
A&A 666, A64 (2022)
The Sagittarius dwarf spheroidal (Sgr) is a dissolving galaxy being tidally disrupted by the Milky Way (MW). Its stellar stream still poses serious modelling challenges, which hinders our ability to use it effectively as a probe of the MW gravitation
Externí odkaz:
http://arxiv.org/abs/2112.02105
Autor:
Ramos, P., Antoja, T., Mateu, C., Anders, F., Laporte, C. F. P., Carballo-Bello, J. A., Famaey, B., Ibata, R.
Publikováno v:
A&A 646, A99 (2021)
The astrometric sample of Gaia allows us to study the outermost Galactic disc, the halo and their interface. It is precisely at the very edge of the disc where the effects of external perturbations are expected to be the most noticeable. Our goal is
Externí odkaz:
http://arxiv.org/abs/2011.01241
Autor:
Ramos, P., Mateu, C., Antoja, T., Helmi, A., Castro-Ginard, A., Balbinot, E., Carrasco, J. M.
Publikováno v:
A&A 638, A104 (2020)
The Sagittarius stream is one of the best tools that we currently have to estimate the mass and shape of our Galaxy. However, assigning membership and obtaining the phase-space distribution of the stars that form the tails is quite challenging. Our g
Externí odkaz:
http://arxiv.org/abs/2002.11142
Publikováno v:
A&A 635, L3 (2020)
We aim to measure the proper motion along the Sagittarius stream that is the missing piece to determine its full 6D phase space coordinates. We conduct a blind search of over-densities in proper motion from Gaia DR2 in a broad region around the Sagit
Externí odkaz:
http://arxiv.org/abs/2001.10012
Autor:
Koposov, S. E., Belokurov, V., Li, T. S., Mateu, C., Erkal, D., Grillmair, C. J., Hendel, D., Price-Whelan, A. M., Laporte, C. F. P., Hawkins, K., Sohn, S. T., del Pino, A., Evans, N. W., Slater, C. T., Kallivayalil, N., Navarro, J. F.
We use astrometry, broad-band photometry and variability information from the Data Release 2 of ESA's Gaia mission (GDR2) to identify members of the Orphan Stream (OS) across the whole sky. The stream is traced above and below the celestial equator a
Externí odkaz:
http://arxiv.org/abs/1812.08172
Autor:
Erkal, D., Belokurov, V., Laporte, C. F. P., Koposov, S. E., Li, T. S., Grillmair, C. J., Kallivayalil, N., Price-Whelan, A. M., Evans, N. W., Hawkins, K., Hendel, D., Mateu, C., Navarro, J. F., del Pino, A., Slater, C. T., Sohn, S. T.
In a companion paper by Koposov et al., RR Lyrae from \textit{Gaia} Data Release 2 are used to demonstrate that stars in the Orphan stream have velocity vectors significantly misaligned with the stream track, suggesting that it has received a large g
Externí odkaz:
http://arxiv.org/abs/1812.08192
Publikováno v:
A&A 627, A150 (2019)
There are few warp kinematic models of the Galaxy able to characterise structure and kinematics. These models are necessary to study the lopsidedness of the warp and the twisting of the line-of-nodes of the stellar warp, already seen in gas and dust.
Externí odkaz:
http://arxiv.org/abs/1812.07576
Autor:
Fernandez-Trincado, J. G., Verdugo, T., Reylé, C., Robin, A. C, de Diego, J. A., Motta, V., Vega, L., Downes, J. J., Mateu, C., Vivas, A. K., Briceño, C., Abad, C., Vieira, K., Hernández, J., Nuñez, A., Gatuzz, E.
We present preliminary results of the CIDA Equatorial Variability Survey (CEVS), looking for quasar (hereafter QSO) candidates near the Galactic plane. The CEVS contains photometric data from extended and adjacent regions of the Milky Way disk ($\sim
Externí odkaz:
http://arxiv.org/abs/1510.00862
Autor:
Fernández-Trincado, J. G., Vivas, A. K., Mateu, C. E., Zinn, R., Robin, A. C., Valenzuela, O., Moreno, E., Pichardo, B.
Publikováno v:
A&A 574, A15 (2015)
We present a survey for RR Lyrae stars in an area of 50 deg$^2$ around the globular cluster $\omega$ Centauri, aimed to detect debris material from the alleged progenitor galaxy of the cluster. We detected 48 RR Lyrae stars of which only 11 have been
Externí odkaz:
http://arxiv.org/abs/1411.3004
We explore the possibility of detecting and characterizing the warp of the stellar disc of our Galaxy using synthetic Gaia data. The availability of proper motions and, for the brightest stars radial velocities, adds a new dimension to this study. A
Externí odkaz:
http://arxiv.org/abs/1405.6237