Speaker
Description
Transitional millisecond pulsars (tMSP) represent a dynamic category of celestial sources that establish a crucial connection between low-mass X-ray binaries and millisecond radio pulsars. These systems exhibit transitions from rotation-powered to accretion-powered states and vice versa, highlighting the tight evolutionary link expected by the so-called recycling scenario. In their active phase, these sources manifest two distinct emission modes named high and low, occasionally punctuated by sporadic flares. In this talk, I would like to present high-time resolution spectroscopic observations of the binary tMSP J1023+0038 covering more than an entire orbital period, in the sub-luminous disc state, showing evidence for a significant variability of the emission line and continuum properties over a timescale of minutes. I would like to explore the behaviours linked to the brightest emission lines, focusing on their possible origins, spatial distribution within the disk, and the correlations among the different observed patterns.
| Contribution | Oral talk |
|---|---|
| Affiliation | INAF-OAB, Merate |
| marco.messa@inaf.it |
