# TESS Program G022055

Title: Probing Pulsar Wind Interaction: Linking Redbacks And Transitional Millisecond Pulsar Binaries

PI: Coti Zelati, Francesco - Institut De Ciencies De L'Espai (Ieec-Csic)

Type: SMALL

Summary: The "redback" systems are now challenging the evolutionary link between NS LMXBs and rotation-powered radio pulsars. The study of the long-term behaviour of the optical emission in systems in either states has the great potential to unveil those prone to perform state transitions, to dissect the role of the intra-binary shock between the pulsar and companion winds, and to determine the condition for disc formation and disappearance. We propose to observe at 2-min cadence a sample of 4 redbacks of which 3 are currently in a rotation-powered state and one in an accretion disc-state. The observations will probe the effects of the intra-binary shock in the heated-induced wind of the companion for the 3 former systems, and the long-timescale accretion-induced variability in the latter system.


# Sector 018 targets observed (1)
250704264,33.0436,53.3608,13.85,G022055

# Sector 021 targets observed (1)
117298623,131.5911,28.1447,15.04,G022055