Anwesha Sahu
I am a second-year PhD researcher working with the white dwarfs and transients research group. My supervisors are Deanne Coppejans, and Danny Steeghs. I study AM CVn stars (a sub-class of binary white dwarf stars) in the radio spectrum using data from the VLA. Fundamental questions remain about the accretion and outflow physics of cataclysmic variable stars, and their compact binary counterparts, AM CVn systems. Using observations from the Karl J. Jansky Very Large Array (VLA), I have obtained the deepest radio constraints to date, for two such AM CVn systems: AM CVn and HP Lib. By cross-matching with other large scale surveys such as LOFAR and VLASS, the radio emission properties and mechanisms of AM CVn and CV populations can be better characterised. A key question this study aims to contribute to is whether the emissions observed in CVs are due to flares in the atmosphere of the donor star, as compared to transient jets originating from the accretion disk. Understanding outflows from accreting white dwarfs such as these can propel our undestanding of the Type Ia supernovae progenitors. (Paper in prep) |
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