Asset Details
Do you wish to reserve the book?
Radiation-driven acceleration in the expanding WR140 dust shell
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Radiation-driven acceleration in the expanding WR140 dust shell
Do you wish to request the book?
Radiation-driven acceleration in the expanding WR140 dust shell
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Radiation-driven acceleration in the expanding WR140 dust shell
2022
Overview
The Wolf–Rayet (WR) binary system WR140 is a close (0.9–16.7 mas; ref.
1
) binary star consisting of an O5 primary and WC7 companion
2
and is known as the archetype of episodic dust-producing WRs. Dust in WR binaries is known to form in a confined stream originating from the collision of the two stellar winds, with orbital motion of the binary sculpting the large-scale dust structure into arcs as dust is swept radially outwards. It is understood that sensitive conditions required for dust production in WR140 are only met around periastron when the two stars are sufficiently close
2
–
4
. Here we present multiepoch imagery of the circumstellar dust shell of WR140. We constructed geometric models that closely trace the expansion of the intricately structured dust plume, showing that complex effects induced by orbital modulation may result in a ‘Goldilocks zone’ for dust production. We find that the expansion of the dust plume cannot be reproduced under the assumption of a simple uniform-speed outflow, finding instead the dust to be accelerating. This constitutes a direct kinematic record of dust motion under acceleration by radiation pressure and further highlights the complexity of the physical conditions in colliding-wind binaries.
Multiepoch imagery of the circumstellar dust shell in WR140 is modelled to trace the expansion of the dust plume, which seems to be subject to radiation-driven acceleration.
