Zobrazeno 1 - 10
of 402
pro vyhledávání: '"Gameiro, J"'
Autor:
Armeni, A., Stelzer, B., Frasca, A., Manara, C. F., Walter, F. M., Alcalá, J. M., Schneider, P. C., Sicilia-Aguilar, A., Campbell-White, J., Fiorellino, E., Gameiro, J. F., Gangi, M.
The aim of this work is to characterize the accretion process of the classical T Tauri Star RU Lup. We studied optical high-resolution spectroscopic observations from CHIRON and ESPRESSO, obtained simultaneously with photometric data from AAVSO and T
Externí odkaz:
http://arxiv.org/abs/2408.14996
Autor:
Petrov, P. P., Grankin, K. N., Babina, E. V., Artemenko, S. A., Romanova, M. M., Gorda, S. Yu., Djupvik, A. A., Gameiro, J. F.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 2023, V.524, pp.5944-5953
Spectral and photometric variability of the Classical T Tauri stars RY Tau and SU Aur from 2013 to 2022 is analyzed. We find that in SU Aur the H-alpha line's flux at radial velocity RV = -50 +- 7 km/s varies with a period P = 255 +- 5 days. A simila
Externí odkaz:
http://arxiv.org/abs/2308.08899
Autor:
Bouvier, J., Sousa, A., Pouilly, K., Almenara, J. M., Donati, J. -F., Alencar, S. H. P., Frasca, A., Grankin, K., Carmona, A., Pantolmos, G., Zaire, B., Bonfils, X., Bayo, A., Rebull, L. M., Alonso-Santiago, J., Gameiro, J. F., Cook, N. J., Artigau, E., Survey, the SPIRou Legagy, Consortium
Publikováno v:
A&A 672, A5 (2023)
We investigate the structure and dynamics of the magnetospheric accretion region and associated outflows on a scale smaller than 0.1 au around the young transitional disk system GM Aur. We monitored the variability of the system on timescales ranging
Externí odkaz:
http://arxiv.org/abs/2301.13568
Autor:
Claes, R. A. B., Manara, C. F., Garcia-Lopez, R., Natta, A., Fang, M., Fockter, Z. P., Ábrahám, P., Alcalá, J. M., Campbell-White, J., Garatti, A. Caratti o, Covino, E., Fedele, D., Frasca, A., Gameiro, J. F., Herczeg, G. J., Kóspál, Á., Petr-Gotzens, M. G., Rosotti, G., Venuti, L., Zsidi, G.
Publikováno v:
A&A 664, L7 (2022)
The processes regulating protoplanetary disk evolution are constrained by studying how mass accretion rates scale with stellar and disk properties. The spread in these relations can be used as a constraint to the models of disk evolution, but only if
Externí odkaz:
http://arxiv.org/abs/2208.01447
Publikováno v:
A&A 664, A176 (2022)
Context. There are recent observational evidences that RY Tau may present two different outflow stages, a quiescent one and a more active one. We try to model that phenomenon. Aims. We have performed new 2.5D magneto-hydrodynamical simulations of the
Externí odkaz:
http://arxiv.org/abs/2206.08015
Autor:
Manara, C. F., Frasca, A., Venuti, L., Siwak, M., Herczeg, G. J., Calvet, N., Hernandez, J., Tychoniec, Ł., Gangi, M., Alcalá, J. M., Boffin, H. M. J., Nisini, B., Robberto, M., Briceno, C., Campbell-White, J., Sicilia-Aguilar, A., McGinnis, P., Fedele, D., Kóspál, Á., Ábrahám, P., Alonso-Santiago, J., Antoniucci, S., Arulanantham, N., Bacciotti, F., Banzatti, A., Beccari, G., Benisty, M., Biazzo, K., Bouvier, J., Cabrit, S., Garatti, A. Caratti o, Coffey, D., Covino, E., Dougados, C., Eislöffel, J., Ercolano, B., Espaillat, C. C., Erkal, J., Facchini, S., Fang, M., Fiorellino, E., Fischer, W. J., France, K., Gameiro, J. F., Lopez, R. Garcia, Giannini, T., Ginski, C., Grankin, K., Günther, H. M., Hartmann, L., Hillenbrand, L. A., Hussain, G. A. J., James, M. M., Koutoulaki, M., Lodato, G., Maucó, K., Mendigutía, I., Mentel, R., Miotello, A., Oudmaijer, R. D., Rigliaco, E., Rosotti, G. P., Sanchis, E., Schneider, P. C., Spina, L., Stelzer, B., Testi, L., Thanathibodee, T., Vink, J. S., Walter, F. M., Williams, J. P., Zsidi, G.
Publikováno v:
A&A 650, A196 (2021)
The evolution of young stars and disks is driven by the interplay of several processes, notably accretion and ejection of material. Critical to correctly describe the conditions of planet formation, these processes are best probed spectroscopically.
Externí odkaz:
http://arxiv.org/abs/2103.12446
Autor:
de Albuquerque, R. M. G., Gameiro, J. F., Alencar, S. H. P., Lima, J. J. G., Sauty, C., Melo, C.
Publikováno v:
A&A 636, A86 (2020)
Although the Orion Nebula Cluster is one of the most studied clusters in the solar neighborhood, the evolution of the very low-mass members ($M_* < 0.25 \, M_\odot$) has not been fully addressed due to their faintness. Our goal is to verify if some y
Externí odkaz:
http://arxiv.org/abs/2003.09511
Autor:
Petrov, P. P., Grankin, K. N., Gameiro, J. F., Artemenko, S. A., Babina, E. V., de Albuquerque, R. M. G., Djupvik, A. A., Gahm, G. F., Shenavrin, V. I., Irsmambetova, T. R., Fernandez, M., Mkrtichian, D. E., Gorda, S. Yu.
Classical T Tauri stars with ages of less than 10 Myr possess accretion discs. Magnetohydrodynamic processes at the boundary between the disc and the stellar magnetosphere control the accretion and ejections gas flows. We carried out a long series of
Externí odkaz:
http://arxiv.org/abs/1811.08635
Autor:
Teixeira, G. D. C., Kumar, M. S. N., Smith, L., Lucas, P. W., Morris, C., Borissova, J., Monteiro, M. J. P. F. G., Garatti, A. Caratti o, Peña, C. Contreras, Froebrich, D., Gameiro, J. F.
Publikováno v:
A&A 619, A41 (2018)
The VVV survey has allowed for an unprecedented number of multi-epoch observations of the southern Galactic plane. In a recent paper,13 massive young stellar objects(MYSOs) have already been identified within the highly variable(\Delta Ks > 1 mag) YS
Externí odkaz:
http://arxiv.org/abs/1809.04882
Publikováno v:
A&A 610, A40 (2018)
The T Tauri stars with active accretion disks show veiled photospheric spectra. This is supposedly due to non-photospheric continuum radiated by hot spots beneath the accretion shocks at stellar surface and/or chromospheric emission lines radiated by
Externí odkaz:
http://arxiv.org/abs/1712.03784