Chemical tracers of a highly eccentric AGB–main-sequence star binary

被引：0

作者：

T. Danilovich

J. Malfait

M. Van de Sande

M. Montargès

P. Kervella

F. De Ceuster

A. Coenegrachts

T. J. Millar

A. M. S. Richards

L. Decin

C. A. Gottlieb

C. Pinte

E. De Beck

D. J. Price

K. T. Wong

J. Bolte

K. M. Menten

A. Baudry

A. de Koter

S. Etoka

D. Gobrecht

M. Gray

F. Herpin

M. Jeste

E. Lagadec

S. Maes

I. McDonald

L. Marinho

H. S. P. Müller

B. Pimpanuwat

J. M. C. Plane

R. Sahai

S. H. J. Wallström

J. Yates

A. Zijlstra

机构：

[1] KU Leuven,Institute of Astronomy

[2] Monash University,School of Physics and Astronomy

[3] ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D),School of Physics and Astronomy

[4] University of Leeds,LESIA, Observatoire de Paris

[5] Université PSL,Astrophysics Research Centre, School of Mathematics and Physics

[6] CNRS,JBCA, Department Physics and Astronomy

[7] Sorbonne Université,School of Chemistry

[8] Université Paris Cité,Department of Space, Earth and Environment

[9] Queen’s University Belfast,Theoretical Astrophysics, Department of Physics and Astronomy

[10] University of Manchester,Department of Mathematics

[11] University of Leeds,Department of Chemistry and Molecular Biology

[12] Harvard-Smithsonian Center for Astrophysics,School of Physical Sciences

[13] Université Grenoble Alpes,undefined

[14] CNRS,undefined

[15] IPAG,undefined

[16] Chalmers University of Technology,undefined

[17] Uppsala University,undefined

[18] Institut de Radioastronomie Millimétrique,undefined

[19] Kiel University,undefined

[20] Max-Planck-Institut für Radioastronomie,undefined

[21] Laboratoire d’Astrophysique de Bordeaux,undefined

[22] Université de Bordeaux,undefined

[23] Anton Pannekoek Institute for Astronomy,undefined

[24] University of Amsterdam,undefined

[25] University of Gothenburg,undefined

[26] National Astronomical Research Institute of Thailand,undefined

[27] Laboratoire Lagrange,undefined

[28] Observatoire de la Côte d’Azur,undefined

[29] Université Côte d’Azur,undefined

[30] The Open University,undefined

[31] I. Physikalisches Institut,undefined

[32] Universität zu Köln,undefined

[33] Jet Propulsion Laboratory,undefined

[34] California Institute of Technology,undefined

[35] Department of Computer Science,undefined

[36] University College London,undefined

来源：

Nature Astronomy | 2024年 / 8卷

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摘要：

Binary interactions have been proposed to explain a variety of circumstellar structures seen around evolved stars, including asymptotic giant branch (AGB) stars and planetary nebulae. Studies resolving the circumstellar envelopes of AGB stars have revealed spirals, disks and bipolar outflows, with shaping attributed to interactions with a companion. Here we use a combined chemical and dynamical analysis to reveal a highly eccentric and long-period orbit for W Aquilae, a binary system containing an AGB star and a main-sequence companion. Our results are based on anisotropic SiN emission, the detections of irregular NS and SiC emission towards the S-type star, and density structures observed in the CO emission. These features are all interpreted as having formed during periastron interactions. Our astrochemistry-based method can yield stringent constraints on the orbital parameters of long-period binaries containing AGB stars, and will be applicable to other systems.

引用

页码：308 / 327

页数：19

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