TY - JOUR
T1 - Bipolar rings from jet-inflated bubbles around evolved binary stars
AU - Akashi, Muhammad
AU - Soker, Noam
N1 - Publisher Copyright:
© 2016 The Authors.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2016/10/11
Y1 - 2016/10/11
N2 - We show that a fast wind that expands into a bipolar nebula composed of two opposite jetinflated bubbles can form a pair of bipolar rings around giant stars. Our model assumes three mass-loss episodes: a spherical slow and dense shell, two opposite jets, and a spherical fast wind. We use the FLASH hydrodynamical code in three-dimensions to simulate the flow, and obtain the structure of the nebula. We assume that the jets are launched from an accretion disc around a stellar companion to the giant star. The accretion disc is assumed to be formed when the primary giant star and the secondary star suffer a strong interaction accompanied by a rapid mass transfer process from the primary to the secondary star, mainly a main-sequence star. Later in the evolution the primary star is assumed to shrink and blow a fast tenuous wind that interacts with the dense gas on the surface of the bipolar structure. We assume that the dense mass-loss episode before the jets are launched is spherically symmetric. Our results might be applicable to some planetary nebulae, and further emphasize the large variety of morphological features that can be formed by jets. But we could not reproduce some of the properties of the outer rings of SN 1987A. It seems that some objects, like SN 1987A, require a pre-jets mass-loss episode with a mass concentration at mid-latitudes.
AB - We show that a fast wind that expands into a bipolar nebula composed of two opposite jetinflated bubbles can form a pair of bipolar rings around giant stars. Our model assumes three mass-loss episodes: a spherical slow and dense shell, two opposite jets, and a spherical fast wind. We use the FLASH hydrodynamical code in three-dimensions to simulate the flow, and obtain the structure of the nebula. We assume that the jets are launched from an accretion disc around a stellar companion to the giant star. The accretion disc is assumed to be formed when the primary giant star and the secondary star suffer a strong interaction accompanied by a rapid mass transfer process from the primary to the secondary star, mainly a main-sequence star. Later in the evolution the primary star is assumed to shrink and blow a fast tenuous wind that interacts with the dense gas on the surface of the bipolar structure. We assume that the dense mass-loss episode before the jets are launched is spherically symmetric. Our results might be applicable to some planetary nebulae, and further emphasize the large variety of morphological features that can be formed by jets. But we could not reproduce some of the properties of the outer rings of SN 1987A. It seems that some objects, like SN 1987A, require a pre-jets mass-loss episode with a mass concentration at mid-latitudes.
KW - Binaries: general
KW - Planetary nebulae: general
KW - Stars: AGB and post-AGB
KW - Stars: mass-loss
UR - http://www.scopus.com/inward/record.url?scp=84988734633&partnerID=8YFLogxK
U2 - 10.1093/mnras/stw1683
DO - 10.1093/mnras/stw1683
M3 - 文章
AN - SCOPUS:84988734633
VL - 462
SP - 206
EP - 216
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 1
M1 - stw1683
ER -