7–11 Jul 2025
Teaching and Learning Centre (TLC)
Europe/London timezone

Search of sub-stellar companions of White Dwarfs with X-ray observations

11 Jul 2025, 10:00
10m
Teaching and Learning Centre (TLC)

Teaching and Learning Centre (TLC)

Durham University South Road Durham DH1 3LS
Talk Ins and Outs of Accretion: The Consequences of Mass Transfer onto Compact Objects Ins and Outs of Accretion: The Consequences of Mass Transfer onto Compact Objects

Description

Hard X-ray emission from white dwarfs (WD) is generated by the presence of a stellar companion either by their coronal emission or by an accretion disk formed by the material stripped from the companion. Recent studies have proven that Jupiter-like planets can be the donors of material to create an accretion disk and generate hard X-ray emission. Under this light, here we discuss our X-ray XMM-Newton observations of the accreting WD G29-38 and the Central Star of the Helix Nebula. In addition, we present radiation-hydrodynamic simulations produced with the GUACHO code to study the WD+planet scenario. Synthetic X-ray observations are produced with the help of the CHIANTI database and are compared directly with observations.

Primary authors

Dr Jesús Toalá (IRyA-UNAM) Dr Martín Guerrero (IAA) Dr Raúl F Maldonado (IRyA-UNAM) Sandino Estrada-Dorado (Instituto de Ciencias Nucleares) Dr Verónica Lora (ICN-UNAM)

Co-authors

Dr J Alejandro Esquivel (ICN-UNAM) Dr You-Hua Chu

Presentation materials

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