High-sensitivity radio study of the non-thermal stellar bow shock EB27

We present a deep radio-polarimetric observation of the stellar bow shock EB27 associated to massive star BD+43 3654. This is only confirmed have non-thermal radio emission. used Jansky Very Large Array in S band (2 - 4GHz) test whether this synchrotron emission polarised. The unprecedented sensitivity achieved allowed us map even fainter regions shock, revealing that more diffuse steeper and brighter than previously reported. No linear polarisation detected above 0.5%, although we polarised from two southern sources, probably extragalactic nature. modeled intensity morphology better constrain magnetic field injected power relativistic electrons. Finally, derived set precise parameters for system EB27-BD+43 3654 using Gaia Early Data Release 3, including spatial velocity. new trajectory, back time, intersects core Cyg OB2 association.