Speaker
Description
X-ray observations performed during the last few decades have provided a rich data base on black-hole X-ray binaries. A strong coupling between the properties of the accretion flow and the presence of outflows, such as radio-jets and hot X-ray winds, has been found to be a fundamental characteristic of their powerful outbursts.
Since 2015 we have discovered optical accretion disc winds in several black hole transients [Muñoz-Darias et al. 2016 (Nature), 2017, 2018, 2019]. Here, I will present high-quality spectroscopic observations of several black hole transients in outburst, which reveal that cold winds with terminal velocities up to 3000 km/s are a common feature in these objects. I will discuss the impact and nature of these winds, with great emphasis on their relation with the hotter outflows observed in X-rays and the radio-jets.
| Affiliation | Instituto de Astrofisica de Canarias |
|---|---|
| Topic | Multi-messenger and transient astronomy |
