Comparing population synthesis models of compact double white dwarfs to electromagnetic observations
arXiv:2505.20953 · doi:10.1051/0004-6361/202554302
Abstract
Context: Studies of the Galactic population of double white dwarfs (DWDs) that would be detectable in gravitational waves by LISA have found differences in the number of predicted detectable DWDs of more than an order of magnitude, depending on the binary stellar evolution model used. Particularly, the binary population synthesis code BPASS predicts 20 to 40 times fewer detectable DWDs than the codes SeBa or BSE, which relates to differing treatments of mass transfer and common-envelope events (CEEs). Aims: We aimed to investigate which of these models are closer to reality by comparing their predictions to the DWDs known from electromagnetic observations. Methods: We compared the DWDs predicted by a BPASS galaxy model and a SeBa galaxy model to a DWD catalogue and the sample of DWDs observed by the Zwicky Transient Facility (ZTF), taking into account the observational limits and biases of the ZTF survey. Results: We found that BPASS underpredicts the number of short-period DWDs by at least an order of magnitude compared to the observations, while the SeBa galaxy model is consistent with the observations for DWDs more distant than 500 pc. These results highlight how LISA's observations of DWDs will provide invaluable information on aspects of stellar evolution such as mass transfer and CEEs, which will allow theoretical models to be better constrained.
11 pages, 7 figures, 1 table. Accepted by A&A
References in corpus (74)
- Gaia Data Release 3: Summary of the content and survey properties
- The Zwicky Transient Facility: System Overview, Performance, and First Results
- Evolution of binary stars and the effect of tides on binary populations
- Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
- Galaxies on FIRE (Feedback In Realistic Environments): Stellar Feedback Explains Cosmologically Inefficient Star Formation
- Mind your Ps and Qs: the Interrelation between Period (P) and Mass-ratio (Q) Distributions of Binary Stars
- A Comprehensive Study of Binary Compact Objects as Gravitational Wave Sources: Evolutionary Channels, Rates, and Physical Properties
- Binary Population and Spectral Synthesis Version 2.1: construction, observational verification and new results
- Compact Object Modeling with the StarTrack Population Synthesis Code
- Reevaluating Old Stellar Populations
- The gravitational wave signal from the Galactic disk population of binaries containing two compact objects
- An Improved Spectroscopic Analysis of DA White Dwarfs from the Sloan Digital Sky Survey Data Release 4
- Population synthesis for double white dwarfs I.Close detached systems
- The Distance to the Perseus Spiral Arm in the Milky Way
- Chemo-spectrophotometric evolution of spiral galaxies: I. The model and the Milky Way
- The Zwicky Transient Facility: Surveys and Scheduler
- A catalogue of white dwarfs in Gaia EDR3
- Supernova Type Ia progenitors from merging double white dwarfs: Using a new population synthesis model
- COSMIC Variance in Binary Population Synthesis
- Found: The missing blue opacity in atmosphere models of cool hydrogen white dwarfs
- Short-period AM CVn systems as optical, X-ray and gravitational wave sources
- Reconstructing the evolution of white dwarf binaries: further evidence for an alternative algorithm for the outcome of the common-envelope phase in close binaries
- Prospects for detection of detached double white dwarf binaries with Gaia, LSST and LISA
- The ELM Survey. I. A Complete Sample of Extremely Low Mass White Dwarfs
- The binarity of the local white dwarf population
- The LISA Gravitational Wave Foreground: A Study of Double White Dwarfs
- Gravitational waves from cosmological compact binaries
- Predicting the LISA white dwarf binary population in the Milky Way with cosmological simulations
- A 12 minute Orbital Period Detached White Dwarf Eclipsing Binary
- Gravitational-wave emission from compact Galactic binaries
- General relativistic orbital decay in a seven-minute-orbital-period eclipsing binary system
- The effect of common-envelope evolution on the visible population of post-common-envelope binaries
- Public data release of the FIRE-2 cosmological zoom-in simulations of galaxy formation
- The ELM Survey. II. Twelve Binary White Dwarf Merger Systems
- Search for progenitors of supnernovae type Ia with SPY
- Testing the white dwarf mass-radius relationship with eclipsing binaries
- A systematic search of Zwicky Transient Facility data for ultracompact binary LISA-detectable gravitational-wave sources
- The ELM Survey. VIII. 98 Double White Dwarf Binaries
- The separation distribution and merger rate of double white dwarfs: improved constraints
- Optimal filtering of the LISA data
- Observationally driven Galactic double white dwarf population for LISA
- The 40 pc sample of white dwarfs from Gaia
- Discovery of the Eclipsing Detached Double White Dwarf Binary NLTT 11748
- The Stellar Populations of Pixels and Frames
- Understanding the high-mass binary black hole population from stable mass transfer and super-Eddington accretion in BPASS
- Found: The Progenitors of AM CVn and Supernovae .Ia
- An 8.8 minute orbital period eclipsing detached double white dwarf binary
- A deeply eclipsing detached double helium white dwarf binary
- Precise parameters for both white dwarfs in the eclipsing binary CSS 41177
- A Catalogue of Potential Post Common Envelope Binaries
- A two-stage formalism for common-envelope phases of massive stars
- Magnetic braking saturates: evidence from the orbital period distribution of low-mass detached eclipsing binaries from ZTF
- Discovery and characterization of five new eclipsing AM CVn systems
- Characterizing the Galactic White Dwarf Binary Population with Sparsely Sampled Radial Velocity Data
- Discovery of 36 eclipsing EL CVn binaries found by the Palomar Transient Factory
- SDSS J1152+0248: An eclipsing double white dwarf from the Kepler K2 campaign
- The ELM Survey. IX. A Complete Sample of Low Mass White Dwarf Binaries in the SDSS Footprint
- Gravitational Wave Radiation of Double Degenerates with Extremely low-mass WD companions
- Stellar Crowding and the Science Case for Extremely Large Telescopes
- The ELM Survey South. II. Two dozen new low mass white dwarf binaries
- ZTF J1901+5309: A 40.6-Minute Orbital Period Eclipsing Double White Dwarf System
- Asymmetry in the number of L4 and L5 Jupiter Trojans driven by jumping Jupiter
- Discovery of a Detached, Eclipsing 40 min Period Double White Dwarf Binary and a Friend: Implications for He+CO White Dwarf Mergers
- Eclipsing White Dwarf Binaries in Gaia and the Zwicky Transient Facility
- Revisiting Common Envelope Evolution -- A New Semi-Analytic Model for N-body and Population Synthesis Codes
- The Large Magellanic Cloud Revealed in Gravitational Waves with LISA
- Forward Modelling the O3(a+b) GW transient mass distributions with BPASS by varying compact remnant mass and SNe kick prescriptions
- A seven-Earth-radius helium-burning star inside a 20.5-min detached binary
- End-to-end study of the home and genealogy of the first binary neutron star merger
- An Eclipsing 47 minute Double White Dwarf Binary at 400 pc
- Gravitational wave spectral synthesis
- Recovering Injected Astrophysics from the LISA Galactic Double White Dwarf Binaries
- J0526+5934: a peculiar ultra-short period double white dwarf
- Evaluating the gravitational wave detectability of globular clusters and the Magellanic Clouds for LISA