Interacting Winds and Sub-BHL Accretion in Massive Binaries

Amit Kashi

doi:10.1017/S1743921324002552

Interacting Winds and Sub-BHL Accretion in Massive Binaries

Amit Kashi

Department of Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Massive stars eject strong winds that affect their evolution. When in a binary system, their winds collide and emit radiation across the spectrum, providing an opportunity to study the stars and the interaction between them. There are many physical effects involved in the colliding wind problem, and its complexity requires 3D numerical simulations. We run simulations of colliding winds in massive binary systems that include a detailed treatment of wind ejection, orbital motion, clumpiness, and other effects. These simulations are applied to different kinds of massive binaries, including LBV-WR, WR-WR, WR-O, and O-O systems. Our systematic simulations that were used to determine the general conditions that may lead to accretion onto the star with the weaker wind, and demonstrate new relationships between the mass accretion rate and the ratio of the stellar wind momentum and the Bondi-Hoyle-Lyttleton (BHL) accretion rate.

Original language	English
Title of host publication	Astronomy in Focus - As presented at the IAU 32nd General Assembly, 2024
Editors	Diana M. Worrall
Publisher	Cambridge University Press
Pages	170-172
Number of pages	3
Volume	20
Edition	A32
ISBN (Electronic)	9781009399227, 9781009433341, 9781009545860, 9781009546102, 9781009546126, 9781009866903
DOIs	https://doi.org/10.1017/S1743921324002552
State	Published - 2026
Event	Astronomy in Focus - Presented at the 32nd IAU General Assembly, GA 2024 - Cape Town, South Africa Duration: 6 Aug 2024 → 15 Aug 2024

Conference

Conference	Astronomy in Focus - Presented at the 32nd IAU General Assembly, GA 2024
Country/Territory	South Africa
City	Cape Town
Period	6/08/24 → 15/08/24

Keywords

(stars:) binaries: general
accretion
accretion disks
outflows
stars: mass-loss
stars: massive
stars: winds

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10.1017/S1743921324002552

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@inproceedings{a85a5426d5b54972aa851a8565642321,

title = "Interacting Winds and Sub-BHL Accretion in Massive Binaries",

abstract = "Massive stars eject strong winds that affect their evolution. When in a binary system, their winds collide and emit radiation across the spectrum, providing an opportunity to study the stars and the interaction between them. There are many physical effects involved in the colliding wind problem, and its complexity requires 3D numerical simulations. We run simulations of colliding winds in massive binary systems that include a detailed treatment of wind ejection, orbital motion, clumpiness, and other effects. These simulations are applied to different kinds of massive binaries, including LBV-WR, WR-WR, WR-O, and O-O systems. Our systematic simulations that were used to determine the general conditions that may lead to accretion onto the star with the weaker wind, and demonstrate new relationships between the mass accretion rate and the ratio of the stellar wind momentum and the Bondi-Hoyle-Lyttleton (BHL) accretion rate.",

keywords = "(stars:) binaries: general, accretion, accretion disks, outflows, stars: mass-loss, stars: massive, stars: winds",

author = "Amit Kashi",

note = "Publisher Copyright: {\textcopyright} The Author(s), 2026. Published by Cambridge University Press on behalf of The International Astronomical Union.; Astronomy in Focus - Presented at the 32nd IAU General Assembly, GA 2024 ; Conference date: 06-08-2024 Through 15-08-2024",

year = "2026",

doi = "10.1017/S1743921324002552",

language = "אנגלית",

volume = "20",

pages = "170--172",

editor = "Worrall, \{Diana M.\}",

booktitle = "Astronomy in Focus - As presented at the IAU 32nd General Assembly, 2024",

publisher = "Cambridge University Press",

address = "בריטניה",

edition = "A32",

}

Kashi, A 2026, Interacting Winds and Sub-BHL Accretion in Massive Binaries. in DM Worrall (ed.), Astronomy in Focus - As presented at the IAU 32nd General Assembly, 2024. A32 edn, vol. 20, Cambridge University Press, pp. 170-172, Astronomy in Focus - Presented at the 32nd IAU General Assembly, GA 2024, Cape Town, South Africa, 6/08/24. https://doi.org/10.1017/S1743921324002552

TY - GEN

T1 - Interacting Winds and Sub-BHL Accretion in Massive Binaries

AU - Kashi, Amit

N1 - Publisher Copyright: © The Author(s), 2026. Published by Cambridge University Press on behalf of The International Astronomical Union.

PY - 2026

Y1 - 2026

N2 - Massive stars eject strong winds that affect their evolution. When in a binary system, their winds collide and emit radiation across the spectrum, providing an opportunity to study the stars and the interaction between them. There are many physical effects involved in the colliding wind problem, and its complexity requires 3D numerical simulations. We run simulations of colliding winds in massive binary systems that include a detailed treatment of wind ejection, orbital motion, clumpiness, and other effects. These simulations are applied to different kinds of massive binaries, including LBV-WR, WR-WR, WR-O, and O-O systems. Our systematic simulations that were used to determine the general conditions that may lead to accretion onto the star with the weaker wind, and demonstrate new relationships between the mass accretion rate and the ratio of the stellar wind momentum and the Bondi-Hoyle-Lyttleton (BHL) accretion rate.

AB - Massive stars eject strong winds that affect their evolution. When in a binary system, their winds collide and emit radiation across the spectrum, providing an opportunity to study the stars and the interaction between them. There are many physical effects involved in the colliding wind problem, and its complexity requires 3D numerical simulations. We run simulations of colliding winds in massive binary systems that include a detailed treatment of wind ejection, orbital motion, clumpiness, and other effects. These simulations are applied to different kinds of massive binaries, including LBV-WR, WR-WR, WR-O, and O-O systems. Our systematic simulations that were used to determine the general conditions that may lead to accretion onto the star with the weaker wind, and demonstrate new relationships between the mass accretion rate and the ratio of the stellar wind momentum and the Bondi-Hoyle-Lyttleton (BHL) accretion rate.

KW - (stars:) binaries: general

KW - accretion

KW - accretion disks

KW - outflows

KW - stars: mass-loss

KW - stars: massive

KW - stars: winds

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U2 - 10.1017/S1743921324002552

DO - 10.1017/S1743921324002552

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AN - SCOPUS:105047196052

VL - 20

SP - 170

EP - 172

BT - Astronomy in Focus - As presented at the IAU 32nd General Assembly, 2024

A2 - Worrall, Diana M.

PB - Cambridge University Press

T2 - Astronomy in Focus - Presented at the 32nd IAU General Assembly, GA 2024

Y2 - 6 August 2024 through 15 August 2024

ER -

Interacting Winds and Sub-BHL Accretion in Massive Binaries

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