RECORD
The White Dwarf Binary Pathways Survey VI: two close post common envelope binaries with TESS light curves
Solar and Stellar Astrophysics · Submitted 3 Mar 2022
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Finally, studying the past and future evolution of both systems, we conclude that the common envelope efficiency is likely similar in close white dwarf plus AFGK binaries and PCEBs with M-dwarf companions and find a wide range of possible evolutionary histories for both systems.
The compiled record
The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
Open the compiled record
The abstract, sentence by sentence
Establishing a large sample of post common envelope binaries (PCEBs) that consist of a white dwarf plus an intermediate mass companion star of spectral type AFGK, offers the potential to provide new constraints on theoretical models of white dwarf binary formation and evolution. Here we present a detailed analysis of two new systems, TYC 110-755-1 and TYC 3858-1215-1. Based on radial velocity measurements we find the orbital periods of the two systems to be $\sim$ 0.85 and $\sim$ 1.64 days, respectively. In addition, HST spectroscopy of TYC 110-755-1 allowed us to measure the mass of the white dwarf in this system (0.78 M$_\odot$). We furthermore analysed TESS high time resolution photometry and find both secondary stars to be magnetically extremely active. Differences in the photometric and spectroscopic periods of TYC 110-755-1 indicate that the secondary in this system is differentially rotating. Finally, studying the past and future evolution of both systems, we conclude that the common envelope efficiency is likely similar in close white dwarf plus AFGK binaries and PCEBs with M-dwarf companions and find a wide range of possible evolutionary histories for both systems. While TYC 3858-1215-1 will run into dynamically unstable mass transfer that will cause the two stars to merge and evolve into a single white dwarf, TYC 110-755-1 is a progenitor of a cataclysmic variable system with an evolved donor star.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Establishing a large sample of post common envelope binaries (PCEBs) that consist of a white dwarf plus an intermediate mass companion star of spectral type AFGK, offers the potential to provide new constraints on theoretical models of white dwarf binary formation and evolution. | background 1.00 | 0.06 | 0.03 | hedged possibility 0.98 |
| s1 | Here we present a detailed analysis of two new systems, TYC 110-755-1 and TYC 3858-1215-1. | contribution 1.00 | 0.90 | 0.02 | asserted 0.90 |
| s2 | Based on radial velocity measurements we find the orbital periods of the two systems to be $\sim$ 0.85 and $\sim$ 1.64 days, respectively. | result 1.00 | 0.97 | 0.03 | asserted 1.00 |
| s3 | In addition, HST spectroscopy of TYC 110-755-1 allowed us to measure the mass of the white dwarf in this system (0.78 M$_\odot$). | result 0.98 | 0.97 | 0.02 | asserted 1.00 |
| s4 | We furthermore analysed TESS high time resolution photometry and find both secondary stars to be magnetically extremely active. | result 0.97 | 0.98 | 0.04 | asserted 1.00 |
| s5 | Differences in the photometric and spectroscopic periods of TYC 110-755-1 indicate that the secondary in this system is differentially rotating. | result 0.80 | 0.92 | 0.04 | hedged possibility 0.87 |
| s6 | Finally, studying the past and future evolution of both systems, we conclude that the common envelope efficiency is likely similar in close white dwarf plus AFGK binaries and PCEBs with M-dwarf companions and find a wide range of possible evolutionary histories for both systems. | interpretation 0.93 | 0.94 | 0.69 | hedged possibility 0.97 |
| s7 | While TYC 3858-1215-1 will run into dynamically unstable mass transfer that will cause the two stars to merge and evolve into a single white dwarf, TYC 110-755-1 is a progenitor of a cataclysmic variable system with an evolved donor star. | interpretation 0.61 | 0.90 | 0.25 | asserted 0.99 |
What was examined, and what was not
- arXiv listing abstract v1
- full text
- figures and tables
- references and citing sentences
- relations to other papers
- P abstract
- S sections
- T body sentences
- C citations
- R cross-paper relations
The paper
Original abstract
Establishing a large sample of post common envelope binaries (PCEBs) that consist of a white dwarf plus an intermediate mass companion star of spectral type AFGK, offers the potential to provide new constraints on theoretical models of white dwarf binary formation and evolution. Here we present a detailed analysis of two new systems, TYC 110-755-1 and TYC 3858-1215-1. Based on radial velocity measurements we find the orbital periods of the two systems to be $\sim$ 0.85 and $\sim$ 1.64 days, respectively. In addition, HST spectroscopy of TYC 110-755-1 allowed us to measure the mass of the white dwarf in this system (0.78 M$_\odot$). We furthermore analysed TESS high time resolution photometry and find both secondary stars to be magnetically extremely active. Differences in the photometric and spectroscopic periods of TYC 110-755-1 indicate that the secondary in this system is differentially rotating. Finally, studying the past and future evolution of both systems, we conclude that the common envelope efficiency is likely similar in close white dwarf plus AFGK binaries and PCEBs with M-dwarf companions and find a wide range of possible evolutionary histories for both systems. While TYC 3858-1215-1 will run into dynamically unstable mass transfer that will cause the two stars to merge and evolve into a single white dwarf, TYC 110-755-1 is a progenitor of a cataclysmic variable system with an evolved donor star.
Human review
References
How the literature uses it
2 arXiv papers cite this in 6 sentences
Papers citing it · 4 sentences without a confident label
Uses its method or tool 1 paper
-
For the reconstruction of the CE phase we used the same method we applied in our previous articles [ref] , i.e. based on a grid of stellar evolution tracks generated with the Single Star Evolution (SSE) code from [ref] for solar metallicity and Roche-geometry [ref] .
Close detached white dwarf + brown dwarf binaries: further evidence for low values of the common envelope efficiency · Reconstruction algorithm · 0.99
Compares with it 1 paper
-
In summary, if we interpret the estimated ages of the BD companions as lower limits on the age of the system, the formation of the eight PCEBs with detached BD companions that we studied can be reproduced by assuming a small CE efficiency ($α_CE = 0.24 - 0.41$) nearly identical to the one that is required to explain the large sample of PCEBs with low mass stellar companions [ref] and the majority of PCEBs with earlier spectral type secondary stars [ref] .
Close detached white dwarf + brown dwarf binaries: further evidence for low values of the common envelope efficiency · Non-eclipsing systems · 0.88
What it cites · 1 sentence without a confident label
Uses the method or tool of 2 papers
-
We used the least-squares spectral analysis method based on the Generalized Lomb-Scargle Periodogram [ref] , implemented in the astroML python library [ref] , to identify the orbital period of both systems.
Introduction to astroML: Machine Learning for Astrophysics · Radial velocities · 1.00
-
Additionally, a specialized Monte Carlo sampler created to find converged posterior samplings for Keplerian orbital parameters called The Joker [ref] was used.
Close Binary Companions to APOGEE DR16 Stars: 20,000 Binary-star Systems Across the Color-Magnitude Diagram · Radial velocities · 1.00
Discussion
Know something about this paper? Leave a comment, or highlight any passage above to comment on it.