5 papers
Coherent and Incoherent Emission from the Ordered Magnetospheres of Low-Mass Stars, UCDs, and Massive Stars
Francesco Cavallaro, Paolo Leto, Barnali Das +15
Massive early-type (B/A) stars and ultracool dwarfs (UCDs) represent two distinct regimes in which ordered, large-scale magnetospheres are observed. In rapidly rotating massive sta…
A scaling relationship for non-thermal radio emission from ordered magnetospheres - II. Investigating the efficiency of relativistic electron production in magnetospheres of BA-type stars
P. Leto, S. Owocki, C. Trigilio +19
Magnetic BA stars host dipole-like magnetospheres. When detected as radio sources, their luminosities correlate with the magnetic field and rotation. Rotation is crucial because th…
The effect of collisional cooling of energetic electrons on radio emission from the centrifugal magnetospheres of magnetic hot stars
B. Das, S. P. Owocki
This paper extends our previous study of gyro-emission by energetic electrons in the magnetospheres of rapidly rotating, magnetic massive stars, through a quantitative analysis of…
Discoveries of fine structures and secondary pulses in coherent radio emission from a magnetic massive star
Barnali Das, Poonam Chandra, William Cotton +1
In this paper, we report auroral radio emission from a magnetic B star HD 142990 using the MeerKAT radio telescope at MHz. The star is known to produce such emission (ob…
A Non-Stop Aurora? The Intriguing Radio Emission from the Rapidly Rotating Magnetic Massive Star HR 5907
Ayan Biswas, Barnali Das, James A. Barron +2
HR 5907 (HD 142184) stands out among magnetic OB stars for its rapid rotation, exceptionally hard X-ray emission, and strong magnetic field. High-frequency (>5 GHz) radio emission…