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Looks can be deceiving: Underestimating the age of single white dwarfs due to binary mergers
Temmink, K. D.1,2; Toonen, S.1,3,4; Zapartas, E.1,5; Justham, S.7,8,9; Gaensicke, B. T.6
2020-04-10
Source PublicationASTRONOMY & ASTROPHYSICS
ISSN0004-6361
Volume636Pages:15
AbstractContext. White dwarfs (WDs) are important and abundant tools to study the structure and evolution of the Galactic environment. However, the multiplicity of WD progenitors is generally neglected. Specifically, a merger in a binary system can lead to a single WD, which could result in wrongly inferred quantities if only single stellar evolution (SSE) is considered. These mergers are linked to transients such as luminous red novae and Type Ia supernovae.Aims. We investigate the impact of binary evolution (BE) upon observable single WDs, and compare their properties to WDs formed through SSE. We assess the evolutionary channels and the age and mass distributions of the resulting single WDs.Methods. We employed SeBa to model the evolution of single star and binary populations. We synthesised the observable single WD population within 100 pc, including cooling and observational selection effects. Additionally, we constructed models with different evolution and primordial population properties to study the effects on the properties of the resulting single WDs.Results. White dwarfs from binary mergers make up about 10-30% of all observable single WDs and 30-50% of massive WDs. On average, individual WDs take 3.1-5 times longer to form through BE than SE, and so appear similar to 1 Gyr younger than they are if BE is ignored. In all models, the effect of mergers on the age distribution is clearly noticeable. The median age typically increases by 85-430 Myr and 200-390 Myr for massive WDs. Although abundant, we do not find evidence that WDs from mergers significantly alter the shape of the WD mass distribution.Conclusions. Assuming SSE for inferring properties of single WDs gives rise to intrinsic errors as single WDs can also be formed following a binary merger. Strategies for mitigating the effect of mergers on the WD age distributions are discussed.
Keywordbinaries: close stars: evolution white dwarfs blue stragglers
Funding OrganizationNOVA ; NOVA ; Netherlands Research Council NWO (grant VENI) ; Netherlands Research Council NWO (grant VENI) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; UK STFC grant ; UK STFC grant ; Danish National Research Foundation ; Danish National Research Foundation ; NOVA ; NOVA ; Netherlands Research Council NWO (grant VENI) ; Netherlands Research Council NWO (grant VENI) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; UK STFC grant ; UK STFC grant ; Danish National Research Foundation ; Danish National Research Foundation ; NOVA ; NOVA ; Netherlands Research Council NWO (grant VENI) ; Netherlands Research Council NWO (grant VENI) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; UK STFC grant ; UK STFC grant ; Danish National Research Foundation ; Danish National Research Foundation ; NOVA ; NOVA ; Netherlands Research Council NWO (grant VENI) ; Netherlands Research Council NWO (grant VENI) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; UK STFC grant ; UK STFC grant ; Danish National Research Foundation ; Danish National Research Foundation
DOI10.1051/0004-6361/201936889
WOS KeywordR-CORONAE-BOREALIS ; PARTICLE HYDRODYNAMICS SIMULATIONS ; POPULATION SYNTHESIS ; SOLAR NEIGHBORHOOD ; CLOSE BINARIES ; IA SUPERNOVAE ; INITIAL MASS ; SKY SURVEY ; EVOLUTION ; STARS
Language英语
Funding ProjectNOVA ; Netherlands Research Council NWO (grant VENI)[639.041.645] ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS)[2019.0091] ; UK STFC grant[ST/P000495] ; Danish National Research Foundation[DNRF132]
Funding OrganizationNOVA ; NOVA ; Netherlands Research Council NWO (grant VENI) ; Netherlands Research Council NWO (grant VENI) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; UK STFC grant ; UK STFC grant ; Danish National Research Foundation ; Danish National Research Foundation ; NOVA ; NOVA ; Netherlands Research Council NWO (grant VENI) ; Netherlands Research Council NWO (grant VENI) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; UK STFC grant ; UK STFC grant ; Danish National Research Foundation ; Danish National Research Foundation ; NOVA ; NOVA ; Netherlands Research Council NWO (grant VENI) ; Netherlands Research Council NWO (grant VENI) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; UK STFC grant ; UK STFC grant ; Danish National Research Foundation ; Danish National Research Foundation ; NOVA ; NOVA ; Netherlands Research Council NWO (grant VENI) ; Netherlands Research Council NWO (grant VENI) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; Federal Commission for Scholarships for Foreign Students for the Swiss Government Excellence Scholarship (ESKAS) ; UK STFC grant ; UK STFC grant ; Danish National Research Foundation ; Danish National Research Foundation
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000526998700003
PublisherEDP SCIENCES S A
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/55088
Collection中国科学院国家天文台
Corresponding AuthorTemmink, K. D.
Affiliation1.Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1090 GE Amsterdam, Netherlands
2.Radboud Univ Nijmegen, IMAPP, Dept Astrophys, POB 9010, NL-6500 GL Nijmegen, Netherlands
3.Univ Birmingham, Inst Gravitat Wave Astron, Birmingham B15 2TT, W Midlands, England
4.Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England
5.Univ Geneva, Observ Geneva, CH-1290 Sauverny, Switzerland
6.Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England
7.Univ Amsterdam, GRAPPA, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands
8.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100012, Peoples R China
9.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Temmink, K. D.,Toonen, S.,Zapartas, E.,et al. Looks can be deceiving: Underestimating the age of single white dwarfs due to binary mergers[J]. ASTRONOMY & ASTROPHYSICS,2020,636:15.
APA Temmink, K. D.,Toonen, S.,Zapartas, E.,Justham, S.,&Gaensicke, B. T..(2020).Looks can be deceiving: Underestimating the age of single white dwarfs due to binary mergers.ASTRONOMY & ASTROPHYSICS,636,15.
MLA Temmink, K. D.,et al."Looks can be deceiving: Underestimating the age of single white dwarfs due to binary mergers".ASTRONOMY & ASTROPHYSICS 636(2020):15.
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