scholarly journals Planetary Nebulae Embryo after a Common Envelope Event

Galaxies ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 75 ◽  
Author(s):  
Natalia Ivanova ◽  
Jose Nandez
Keyword(s):  
Binary Stars ◽  
Planetary Nebulae ◽  
Close Binary ◽  
Common Envelope ◽  
Characteristic Speed ◽  
Close Binary Stars

In the centers of some planetary nebulae are found close binary stars. The formation of those planetary nebulae was likely through a common envelope event, which transformed an initially-wide progenitor binary into the currently observed close binary, while stripping the outer layers away. A common envelope event proceeds through several qualitatively different stages, each of which ejects matter at its own characteristic speed, and with a different degree of symmetry. Here, we present how typical post-common envelope ejecta looks kinematically a few years after the start of a common envelope event. We also show some asymmetric features we have detected in our simulations (jet-like structures, lobes, and hemispheres).

scholarly journals Surveying Planetary Nebulae Central Stars for Close Binaries: Constraining Evolution of Central Stars Based on Binary Parameters

Galaxies ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 85 ◽  
Author(s):  
Todd Hillwig
Keyword(s):  
Binary Stars ◽  
Planetary Nebula ◽  
Planetary Nebulae ◽  
Close Binary ◽  
Close Binaries ◽  
Common Envelope ◽  
Close Binary Stars ◽  
Red Giant ◽  
The Relationship ◽  
Central Stars

The increase in discovered close binary central stars of planetary nebulae is leading to a sufficiently large sample to begin to make broader conclusions about the effect of close binary stars on common envelope evolution and planetary nebula formation. Herein I review some of the recent results and conclusions specifically relating close binary central stars to nebular shaping, common envelope evolution off the red giant branch, and the total binary fraction and double degenerate fraction of central stars. Finally, I use parameters of known binary central stars to explore the relationship between the proto-planetary nebula and planetary nebula stages, demonstrating that the known proto-planetary nebulae are not the precursors of planetary nebulae with close binary central stars.

scholarly journals Planetary nebulae: 20 years of Hubble inquiry

2011 ◽  
Vol 7 (S283) ◽  
pp. 53-58
Author(s):  
Bruce Balick
Keyword(s):  
Binary Stars ◽  
Hubble Space Telescope ◽  
Planetary Nebulae ◽  
Close Binary ◽  
Stellar Winds ◽  
Physical Processes ◽  
The Past ◽  
Close Binary Stars ◽  
Nuclear Burning ◽  
Movie Camera

AbstractThe Hubble Space Telescope has served the critical roles of microscope and movie camera in the past 20 years of research on planetary nebulae (“PNe”). We have glimpsed the details of the evolving structures of neutral and ionized post-AGB objects, built ingenious heuristic models that mimic these structures, and constrained most of the relevant physical processes with careful observations and interpretation. We have searched for close physical binary stars with spatial resolution ~50 AU at 1 AU, located jets emerging from the nucleus at speeds up to 2000 km s−1 and matched newly discovered molecular and X-ray emission regions to physical substructures in order to better understand how stellar winds and ionizing radiation interact to form the lovely symmetries that are observed. Ultraviolet spectra of CNO in PNe help to uncover how stars process deep inside AGB stars with unstable nuclear burning zones. HST broadband imaging has been at the forefront of uncovering surprisingly complex wind morphologies produced at the tip of the AGB, and has led to an increasing realization of the potentially vital roles of close binary stars and emerging magnetic fields in shaping stellar winds.

scholarly journals Do Blue Stragglers Form by Common Envelope Evolution?

1980 ◽  
Vol 88 ◽  
pp. 145-148 ◽  
Author(s):  
F. Meyer ◽  
E. Meyer-Hofmeister
Keyword(s):  
Binary System ◽  
Binary Stars ◽  
Close Binary ◽  
Common Envelope ◽  
Blue Stragglers ◽  
Close Binary Stars ◽  
Blue Straggler

All proposals to explain the formation of blue stragglers advanced up to now seem to have inherent difficulties. One appealing possibility, the formation by coalescence of close binary stars, appears to be ruled out by the existence of blue stragglers with more than twice the turn-off mass of their cluster. We suggest that this contradiction does not exist, since the binary system on its way to coalescence passes through a phase in which a very extended common envelope with a size of several hundred solar radii forms. In this stage a third companion in the range of this envelope will be captured and finally merge to form a blue straggler that can have more than twice the turn-off mass.

scholarly journals The Origin of Type Ib-Ic-IIb-IIL Supernovae and Binary Star Evolution

1996 ◽  
Vol 165 ◽  
pp. 119-134 ◽  
Author(s):  
K. Nomoto ◽  
K. Iwamoto ◽  
T. Suzuki ◽  
O.R. Pols ◽  
H. Yamaoka ◽  
...  
Keyword(s):  
Binary Stars ◽  
Binary Star ◽  
Close Binary ◽  
Type I ◽  
Type Ii ◽  
Common Envelope ◽  
Star Evolution ◽  
Close Binary Stars ◽  
New Information ◽  
Massive Close Binary

Supernovae are classified as type I and type II and further subdivided into Ia, Ib, Ic, II-P, II-L, and IIb. The origin of this observational diversity has not been well understood. The recent nearby supernovae SN 1993J and SN 1994I have provided particularly useful material to clarify the supernova — progenitor connection. For a progenitor of type IIb supernova 1993J, we propose that merging of two stars in a close binary is responsible for the formation of a thin H-rich envelope. As a progenitor of type Ic supernova 1994I, we propose a bare C+O star that has lost both its H and He envelope after a common-envelope phase. By generalizing these scenarios, we show that common-envelope evolution in massive close binary stars leads to various degrees of stripping off of the envelope of a massive star. This naturally leads to an explanation of the origin of type II-L, IIn, IIb, Ib, and Ic in a unified manner. The binary hypothesis to explain the diversity of supernovae can be substantiated with new information on SN IIb 1993J and SN Ic 1994I. Model light curves are compared with observations. Since extensive mass loss is essential for the binary scenario, circumstellar interactions are examined for comparison with X-ray observations.

scholarly journals Close Binary Stars in Planetary Nebulae through Gaia EDR3

2021 ◽  
Vol 7 (1) ◽  
pp. 40
Author(s):  
Iker González-Santamaría ◽  
Minia Manteiga ◽  
Carlos Dafonte
Keyword(s):  
Big Data ◽  
Binary Stars ◽  
Binary Systems ◽  
Planetary Nebulae ◽  
Statistical Test ◽  
Close Binary ◽  
Close Binary Systems ◽  
Close Binary Stars ◽  
Stellar Envelopes ◽  
Central Stars

The aim of this work is to search for evidence of close binary stars associated with planetary nebulae (ionized stellar envelopes in expansion) by mining the astronomical archive of Gaia EDR3. For this task, using big data techniques, we selected a sample of central stars of planetary nebulae from almost 2000 million sources in an EDR3 database. Then, we analysed some of their parameters, which could provide clues about the presence of close binary systems, and we ran a statistical test to verify the results. Using this method, we concluded that red stars tend to show more affinity with close binarity than blue ones.

scholarly journals Common Envelope Evolution of Binary Stars

1989 ◽  
Vol 107 ◽  
pp. 299-310
Author(s):  
Mario Livio
Keyword(s):  
White Dwarf ◽  
Binary Stars ◽  
Energy Deposition ◽  
Binary Systems ◽  
Planetary Nebulae ◽  
Close Binary ◽  
Type I ◽  
Common Envelope ◽  
The Common

AbstractWe discuss the common envelope phase in the evolution of binary systems. The problem of the efficiency of energy deposition into envelope ejection is treated in some detail. We describe the implications of common envelope evolution for the shaping of planetary nebulae with close binary nuclei and for double white dwarf systems, considered to be the progenitors of Type I supernovae.

Close Binary Stars and Their Significance for the Theory of Stellar Evolution

1972 ◽  
Vol 107 (6) ◽  
pp. 325
Author(s):  
D.Ya. Martynov
Keyword(s):  
Stellar Evolution ◽  
Binary Stars ◽  
Close Binary ◽  
Close Binary Stars

Radial Velocity Studies of Close Binary Stars. II.

1999 ◽  
Vol 118 (5) ◽  
pp. 2451-2459 ◽  
Author(s):  
Slavek M. Rucinski ◽  
Wenxian Lu
Keyword(s):  
Radial Velocity ◽  
Binary Stars ◽  
Close Binary ◽  
Close Binary Stars

scholarly journals Radial Velocity Studies of Close Binary Stars. XII.

2007 ◽  
Vol 133 (5) ◽  
pp. 1977-1987 ◽  
Author(s):  
Theodor Pribulla ◽  
Slavek M. Rucinski ◽  
George Conidis ◽  
Heide DeBond ◽  
J. R. Thomson ◽  
...  
Keyword(s):  
Radial Velocity ◽  
Binary Stars ◽  
Close Binary ◽  
Close Binary Stars
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