Lagos, F., Schreiber, M.R., Parsons, S.G. orcid.org/0000-0002-2695-2654 et al. (5 more authors) (2022) The white dwarf binary pathways survey VII: evidence for a bi-modal distribution of post mass transfer systems? Monthly Notices of the Royal Astronomical Society, 512 (2). pp. 2625-2635. ISSN 0035-8711
Abstract
Binary systems consisting of a white dwarf and a main-sequence companion with orbital periods up to ≈100 d are often thought to be formed through common envelope evolution which is still poorly understood. To provide new observational constraints on the physical processes involved in the formation of these objects, we are conducting a large-scale survey of close binaries consisting of a white dwarf and an A to K-type companion. Here we present three systems with eccentric orbits and orbital periods between ≈10 − 42 d discovered by our survey. Based on HST spectroscopy and high angular resolution images obtained with SPHERE-IRDIS, we find that two of these systems are most likely triple systems while the remaining one could be either a binary or a hierarchical triple but none of them is a post common envelope binary (PCEB). The discovery of these systems shows that our survey is capable to detect systems with orbital periods of the order of weeks, but all six PCEBs we have previously discovered have periods below 2.5 d. We suggest that the fact that all of the systems we identify with periods of the order of weeks are not PCEBs indicates a transition between two different mechanisms responsible for the formation of very close (≲ 10 d) and somewhat wider WD+AFGK binaries: common envelope evolution and non-conservative stable mass transfer.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This is an author-produced version of a paper subsequently published in Monthly Notices of the Royal Astronomical Society. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | binaries (including multiple): close; stars: white dwarfs; techniques: high angular resolution |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL ST/R003424/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 21 Mar 2022 17:03 |
Last Modified: | 03 Feb 2023 11:22 |
Status: | Published |
Publisher: | Oxford University Press (OUP) |
Refereed: | Yes |
Identification Number: | 10.1093/mnras/stac673 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:184927 |