6 papers
A semi-coherent search for optical pulsations from Scorpius X-1
Riccardo La Placa, Alessandro Papitto, Giulia Illiano +14
The emission of continuous gravitational waves (CWs) possibly explains why pulsars spinning with a period shorter than a millisecond have not been observed so far. Neutron stars ac…
Octave-spanning 10-GHz Er-doped solid-state optical frequency comb
Niccolò S. Barberio, Francesco Canella, Andrea Pertoldi +8
Optical frequency combs provide a phase-coherent interface between optical and microwave domains, underpinning advances in precision metrology, spectroscopy, and time-frequency tra…
Zeeman Doppler mapping deconstructed
M. J. Stift, F. Leone
Aims. Magnetic and abundance maps of chemically peculiar (CP) stars, derived with the help of Zeeman Doppler mapping, have invariably been used as arguments against theories, in pa…
Super-slowly rotating Ap (ssrAp) stars: New spectroscopic observations
Gautier Mathys, Daniel L. Holdsworth, Marina Giarrusso +2
The rotation periods of Ap stars range over five to six orders of magnitude. The origin of their differentiation remains unknown. We carry out a systematic study of the longest per…
Evidence for optical pulsations from a redback millisecond pulsar
A. Papitto, F. Ambrosino, M. Burgay +16
Recent detections of optical pulsations from both a transitional and an accreting millisecond pulsar have revealed unexpectedly bright signals, suggesting that the presence of an a…
Probing multi-band variability and mode switching in the candidate transitional millisecond pulsar 3FGL J1544.6-1125
Giulia Illiano, Francesco Coti Zelati, Arianna Miraval Zanon +20
We present the most extensive high-time resolution multi-band campaign to date on the candidate transitional millisecond pulsar (tMSP) 3FGL J1544.6-1125 in the sub-luminous disk st…