Topics

X-ray binaries: accretion, time-series and spectral analysis.
Supernova remnants: thermal and non-thermal emission, shock physics, spatially-resolved spectral analysis.
Colliding wind binaries: non-thermal radio and hard X-ray emission, particle acceleration, radiation processes.

Projects

Co-supervision of G. Mancuso PhD Thesis.
Co-supervision of V. Cúneo Postdoc project.

Publications

The high-energy emission from HD 93129A near periastron
S. del Palacio, F. Garcia, D. Altamirano, et al. (2020).
Published in MNRAS 494, 6043.   ArXiV:2004.10032   ADS

Discovery of millihertz quasi-periodic oscillations in the X-ray binary EXO 0748--676
G. C. Mancuso, D. Altamirano, F. García, M. Lyu, M. Méndez, J. A. Combi, M. Díaz-Trigo, J. J. M. in't Zand (2019).
Published in MNRAS Letters 486, 74.
ArXiV:1905.01956

- in the media:
PHYS.ORG, by Tomasz Nowakowski

NICER look at the state transitions during the reflares of the black-hole candidate MAXI J1535-571
V.A. Cúneo, K. Alabarta, L. Zhang, D. Altamirano, et al., 2020, to be submitted to MNRAS

X-ray spectral and timing evolution of MAXI J1727-203 using NICER
K. Alabarta, D.Altamirano, M. Méndez, V.A. Cúneo, et al. 2020, to be submitted to MNRAS

Soft X-ray emission lines in the X-ray binary Swift J1858.6-0814 observed with XMM-Newton-RGS: disc atmosphere or wind?
D. J. K. Buisson, D. Altamirano, M. Diaz Trigo, M. Mendez, M. Armas Padilla, N. Castro Segura, N. D. Degenaar, J. van den Eijnden, F. A. Fogantini et al. (2020) submitted to MNRAS.

Discovery of Type-I X-ray bursts from MAXI J1807+132
A. C. Alyabati, D. Altamirano, G. K. Jaisawal, P. Bult, S. Rapisarda, G. C. Mancuso, in prep.

XMM-Newton and NICER measurement of the rms spectra of the amplitude of the millihertz quasi-periodic oscillations in the neutron-star low-mass X-ray binary 4U 1636-53
M. Lyu, G. B. Zhang, M. Mendez, D. Altamirano, G. C. Mancuso, et al. (2020), submitted to ApJ.

The Changing-look Optical Wind of the Flaring X-ray Transient Swift J1858.6-0814
T. Munoz-Darias, M. Armas Padilla, F. Jimenez-Ibarra, G. Panizo-Espinar, J. Casares, D. Altamirano, D. J. K. Buisson, N. Castro Segura, V. A. Cuneo, N. Degenaar, F. A. Fogantini, et al. (2020), submitted to ApJ.

The strongly variable radio counterpart of Swift J1858.6-0814
J. van den Eijnden, N. Degenaar, T. D. Russell, D. Altamirano, M. Armas Padilla, A. Bahramian, D. J. K. Buisson, N. Castro Segura, F. A. Fogantini, et al. (2020), submitted to MNRAS

Proposals

We have written three Chandra, NuSTAR and XMM-Newton proposals on interacting/colliding wind binaries. Two were accepted and one is in evaluation process.

2019: S. del Palacio, F. Garcia, et al.
Relativistic particle acceleration in the Wolf-Rayet bubble G2.4+1.4.
Awarded time: 58 ks in XMM-Newton.

Funding

We acknowledge funding from the Royal Society.