Dark passengers★ in stellar surveys

Yalinewich, Almog; Beniamini, Paz; Hotokezaka, Kenta; Zhu, Wei

doi:10.1093/mnras/sty2327

Cited by 49 publications

(52 citation statements)

References 47 publications

(66 reference statements)

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“…Since we adopted two more observational constraints as well as the extinction, it is reasonable that our detectability is significantly smaller than they estimated. Yamaguchi et al (2018) and Yalinewich et al (2018), which used the same constraints as ours, estimated more than 10 times larger number of BH-LC binaries can be detected. They also reported different LC mass distributions from ours.…”

Section: Comparisons With Previous Studiessupporting

confidence: 58%

“…Some previous researches have estimated hundreds to thousands of BH-LC binaries can be detected with Gaia (Mashian & Loeb 2017;Breivik et al 2017;Yamaguchi et al 2018;Yalinewich et al 2018;Kinugawa & Yamaguchi 2018;Shao & Li 2019;Chawla et al 2021). All of the binaries so far were thought to be isolated binaries, which were born as tight binaries and did not experience any dynamical interactions with other stars in the MW disk.…”

Section: Introductionmentioning

confidence: 99%

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Detectablity of Black Hole Binaries with Gaia: Dependence on Binary Evolution Models

Shikauchi,

Tanikawa,

Kawanaka

2021

Preprint

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Astrometric satellite Gaia is expected to observe non-interacting black hole (BH) binaries with luminous companions (LCs) (hereafter BH-LC binaries), a different population from BH X-ray binaries previously discovered. The detectability of BH-LC binaries with Gaia might be dependent on binary evolution models. We investigated the Gaia's detectability of BH-LC binaries formed through isolated binary evolution by means of binary population synthesis technique, and examined its dependence on single and binary star models: supernova models, common envelope (CE) ejection efficiency α, and BH natal kick models. We estimated that 1.1 -46 BH-LC binaries can be detected within five-year observation, and found that α has the largest impacts on the detectable number. In each model, observable and intrinsic BH-LC binaries have similar distributions. Therefore, we found three important implications: (1) if the lower BH mass gap is not intrinsic (i.e. 3 -5 M BHs exist), Gaia will observe ≤ 5M BHs, (2) we may observe short orbital period binaries with light LCs if CE efficiency is significantly high, and (3) we may be able to identify the existence of natal kick from eccentricity distribution.

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Section: Comparisons With Previous Studiessupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Detectablity of Black Hole Binaries with Gaia: Dependence on Binary Evolution Models

Shikauchi,

Tanikawa,

Kawanaka

2021

Preprint

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“…Scaling this with the respective star-formation rates would lead to something like 500 to several thousand OB+BH binaries in the MW. Simplified binary population synthesis models predict similar numbers, and show that the order of magnitude of the expected number of OB+BH binaries is only weakly dependent on the major uncertainties in the models (Yamaguchi et al 2018, Yalinewich et al 2018, Shao & Li 2019. At the same time, as discussed in Sect.…”

Section: Ob+bh Binary Detection Strategiesmentioning

confidence: 96%

“…that the Gaia satellite offers excellent prospects for identifying OB+BH binaries this way (Breivik et al 2017;Mashian & Loeb 2017;Yalinewich et al 2018;Yamaguchi et al 2018). Furthermore, a BH companion induces a photometric variability to an OB star in several ways (Zucker, et al 2007, Masuda & Hotokezaka 2019.…”

Section: Ob+bh Binary Detection Strategiesmentioning

confidence: 99%

Properties of OB star−black hole systems derived from detailed binary evolution models

Langer

Schürmann

Stoll

et al. 2020

A&A

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Context. The recent gravitational wave measurements have demonstrated the existence of stellar mass black hole binaries. It is essential for our understanding of massive star evolution to identify the contribution of binary evolution to the formation of double black holes. Aims. A promising way to progress is investigating the progenitors of double black hole systems and comparing predictions with local massive star samples such as the population in 30 Doradus in the Large Magellanic Cloud (LMC). Methods. To this purpose, we analyse a large grid of detailed binary evolution models at LMC metallicity with initial primary masses between 10 and 40 M , and identify which model systems potentially evolve into a binary consisting of a black hole and a massive main sequence star. We then derive the observable properties of such systems, as well as peculiarities of the OB star component. Results. We find that ∼3% of the LMC late O and early B stars in binaries are expected to possess a black hole companion, when assuming stars with a final helium core mass above 6.6 M to form black holes. While the vast majority of them may be X-ray quiet, our models suggest that these may be identified in spectroscopic binaries, either by large amplitude radial velocity variations ( ∼ > 50 km s −1 ) and simultaneous nitrogen surface enrichment, or through a moderate radial velocity ( ∼ > 10 km s −1 ) and simultaneously rapid rotation of the OB star. The predicted mass ratios are such that main sequence companions could be excluded in most cases. A comparison to the observed OB+WR binaries in the LMC, Be/X-ray binaries, and known massive BH binaries supports our conclusion. Conclusions. We expect spectroscopic observations to be able to test key assumptions in our models, with important implications for massive star evolution in general, and for the formation of double-black hole mergers in particular.

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“…In addition, it also drives other researchers to use similar observational methods to find such black hole systems, like with Gaia (e.g. Yalinewich et al, 2018), the APOGEE survey (Thompson et al, 2019), TESS (Masuda & Hotokezaka, 2019), or the LAMOST survey (Gu et al, 2019).…”

Section: Black Holesmentioning

confidence: 99%

Spectroscopy of Binaries in Globular Clusters

David¹

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Dark passengers★ in stellar surveys

Cited by 49 publications

References 47 publications

Detectablity of Black Hole Binaries with Gaia: Dependence on Binary Evolution Models

Detectablity of Black Hole Binaries with Gaia: Dependence on Binary Evolution Models

Properties of OB star−black hole systems derived from detailed binary evolution models

Spectroscopy of Binaries in Globular Clusters

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