Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Cuneo, V. A."'
Autor:
Cúneo, V. A., Casares, J., Padilla, M. Armas, Sánchez-Sierras, J., Corral-Santana, J. M., Maccarone, T. J., Sánchez, D. Mata, Muñoz-Darias, T., Torres, M. A. P., Vincentelli, F.
Among the sample of Galactic transient X-ray binaries (SXTs) discovered to date, about 70 have been proposed as likely candidates to host a black hole. Yet, only 19 have been dynamically confirmed. Such a reliable confirmation requires phase-resolved
Externí odkaz:
http://arxiv.org/abs/2310.17693
Autor:
Casares, J., Yanes-Rizo, I. V., Torres, M. A. P., Abbott, T. M. C., Padilla, M. Armas, Charles, P. A., Cuneo, V. A., Muñoz-Darias, T., Jonker, P. G., Maguire, K.
We present evidence for a 0.278(8) d (=6.7 h) orbital period in the X-ray transient GRS 1716-249 (=N Oph 93), based on a superhump modulation detected during the 1995 mini-outburst plus ellipsoidal variability in quiescence. With a quiescent magnitud
Externí odkaz:
http://arxiv.org/abs/2310.11561
Autor:
Cúneo, V. A., Muñoz-Darias, T., Jiménez-Ibarra, F., Panizo-Espinar, G., Sánchez-Sierras, J., Padilla, M. Armas, Casares, J., Sánchez, D. Mata, Torres, M. A. P., Vincentelli, F., Ambrifi, A.
Publikováno v:
A&A 679, A85 (2023)
Accreting white dwarfs are known to show signatures of wind-type outflows in the ultraviolet. At optical wavelengths, however, wind detections have only been reported for a few sources. We present GTC-10.4m optical spectroscopy of four accreting whit
Externí odkaz:
http://arxiv.org/abs/2309.03275
Autor:
Vincentelli, F. M., Casella, P., Borghese, A., Cavecchi, Y., Mastroserio, G., Stella, L., Altamirano, D., Padilla, M. Armas, Baglio, M. C., Belloni, T. M., Casares, J., Cúneo, V. A., Degenaar, N., Trigo, M. Díaz, Fender, R., Maccarone, T., Malzac, J., Sánchez, D. Mata, Middleton, M., Migliari, S., Muñoz-Darias, T., O'Brien, K., Panizo-Espinar, G., Sánchez-Sierras, J., Russell, D. M., Uttley, P.
We report on the first simultaneous high-time resolution X-ray and infrared (IR) observations of a neutron star low mass X-ray binary in its hard state. We performed $\approx 2\,$h of simultaneous observations of 4U 1728-34 using HAWK-I@VLT, XMM-Newt
Externí odkaz:
http://arxiv.org/abs/2308.15570
Autor:
Padilla, M. Armas, Corral-Santana, J. M., Borghese, A., Cúneo, V. A., Muñoz-Darias, T., Casares, J., Torres, M. A. P.
Publikováno v:
A&A 677, A186 (2023)
Ultracompact X-ray binaries (UCXBs) are a distinctive but elusive family of low-mass X-ray binaries (LMXBs) characterised by their tight orbits and degenerate donor stars. Here we present UltraCompCAT, the first online and comprehensive catalogue of
Externí odkaz:
http://arxiv.org/abs/2305.07691
Autor:
Sánchez-Sierras, J., Muñoz-Darias, T., Casares, J., Panizo-Espinar, G., Padilla, M. Armas, Corral-Santana, J., Cúneo, V. A., Sánchez, D. Mata, Motta, S. E., Ponti, G., Steeghs, D., Torres, M. A. P., Vincentelli, F.
Publikováno v:
A&A 673, A104 (2023)
We present simultaneous optical and near-infrared spectra obtained during the 2021 outburst of the black hole transient 4U 1543-47. The X-ray hardness-intensity diagram and the comparison with similar systems reveal a luminous outburst, probably reac
Externí odkaz:
http://arxiv.org/abs/2303.08837
Autor:
Vincentelli, F. M., Neilsen, J., Tetarenko, A. J., Cavecchi, Y., Segura, N. Castro, del Palacio, S., Eijnden, J. van den, Vasilopoulos, G., Altamirano, D., Padilla, M. Armas, Bailyn, C. D., Belloni, T., Buisson, D. J. K., Cuneo, V. A., Degenaar, N., Knigge, C., Long, K. S., Jimenez-Ibarra, F., Milburn, J., Darias, T. Muñoz, Arabaci, M. Ozbey, Remillard, R., Russell, T.
Accretion disks around compact objects are expected to enter an unstable phase at high luminosity. One instability may occur when the radiation pressure generated by accretion modifies the disk viscosity, resulting in the cyclic depletion and refilli
Externí odkaz:
http://arxiv.org/abs/2303.00020
Autor:
Casares, J., Muñoz-Darias, T., Torres, M. A. P., Sanchez, D. Mata, Britt, C. T., Padilla, M. Armas, Alvarez-Hernandez, A., Cuneo, V. A., Hernandez, J. I. Gonzalez, Jimenez-Ibarra, F., Jonker, P. G., Panizo-Espinar, G., Sanchez-Sierras, J., Yanes-Rizo, I. V.
We present a new method to derive binary inclinations in quiescent black hole (BH) X-ray transients (XRTs), based on the depth of the trough (T) from double-peaked Ha emission profiles arising in accretion discs. We find that the inclination angle (i
Externí odkaz:
http://arxiv.org/abs/2207.01628
Autor:
Panizo-Espinar, G., Padilla, M. Armas, Muñoz-Darias, T., Koljonen, K. I. I., Cúneo, V. A., Sánchez-Sierras, J., Sánchez, D. Mata, Casares, J., Corral-Santana, J., Fender, R. P., Jiménez-Ibarra, F., Ponti, G., Steeghs, D., Torres, M. A. P.
Publikováno v:
A&A 664, A100 (2022)
MAXI J1348-630 is a low mass X-ray binary discovered in 2019 during a bright outburst. During this event, the system sampled both hard and soft states following the standard evolution. We present multi-epoch optical and near-infrared spectroscopy obt
Externí odkaz:
http://arxiv.org/abs/2205.09128
Autor:
Segura, N. Castro, Knigge, C., Long, K. S., Altamirano, D., Padilla, M. Armas, Bailyn, C., Buckley, D. A. H., Buisson, D. J. K., Casares, J., Charles, P., Combi, J. A., Cúneo, V. A., Degenaar, N. D., del Palacio, S., Trigo, M. Díaz, Fender, R., Gandhi, P., Georganti, M., Gutiérrez, C., Santisteban, J. V. Hernandez, Jiménez-Ibarra, F., Matthews, J., Méndez, M., Middleton, M., Muñoz-Darias, T., Arabacı, M. Özbey, Pahari, M., Rhodes, L., Russell, T. D., Scaringi, S., Eijnden, J. van den, Vasilopoulos, G., Vincentelli, F. M., Wiseman, P.
All disc-accreting astrophysical objects produce powerful outflows. In binaries containing neutron stars (NS) or black holes, accretion often takes place during violent outbursts. The main disc wind signatures during these eruptions are blue-shifted
Externí odkaz:
http://arxiv.org/abs/2203.01372