Planetary nebulae in planetary and binary systems

1981 ◽  
Vol 77 (2) ◽  
pp. 319-324 ◽  
Author(s):  
Kyu H. Choi ◽  
Samuel C. Vila
Keyword(s):  
Binary Systems ◽  
Planetary Nebulae

X‐Ray Emission from Central Binary Systems of Planetary Nebulae

2002 ◽  
Vol 570 (1) ◽  
pp. 245-251 ◽  
Author(s):  
Noam Soker ◽  
Joel H. Kastner
Keyword(s):  
Binary Systems ◽  
Planetary Nebulae ◽  
X Ray

scholarly journals Shaping bipolar and elliptical Planetary Nebulae: Rotation and magnetic field

1997 ◽  
Vol 180 ◽  
pp. 226-226 ◽  
Author(s):  
Guillermo García-Segura ◽  
Norbert Langer ◽  
Michał Różyczka ◽  
Mordechai-Mark Mac Low ◽  
José Franco
Keyword(s):  
Magnetic Field ◽  
Ionizing Radiation ◽  
Radiation Field ◽  
Binary Systems ◽  
Planetary Nebulae ◽  
Stellar Rotation ◽  
Central Source ◽  
Formation And Evolution

We present hydrodynamical and magnetohydronynamical simulations for the formation and evolution of bipolar and elliptical planetary nebulae with two interacting winds. The models are performed under the hypothesis of a single central source, i.e. binary systems are not considered and a single initial wind function is used in our calculations. We explore various relevant parameters, including the effects of stellar rotation, ionizing radiation field and stellar magnetic field, and a catalogue of resulting shapes is generated.

scholarly journals Planetary Nebulae with binary nuclei

1997 ◽  
Vol 180 ◽  
pp. 74-84 ◽  
Author(s):  
Mario Livio
Keyword(s):  
High Resolution ◽  
Crucial Role ◽  
Binary Systems ◽  
Planetary Nebulae ◽  
Specific Mechanism ◽  
Essential Information ◽  
Common Envelope ◽  
High Resolution Images ◽  
The Common ◽  
Central Stars

High resolution images of planetary nebulae have revealed a variety of non-spherical morphologies. In addition, some planetary nebulae were found to produce highly collimated jets. It is argued that binary central stars may play a crucial role in the production of all of these morphologies. In particular, a specific mechanism is identified for the generation of “point-symmetric” nebulae. It is shown that the study of binary nuclei of planetary nebulae can provide essential information for the understanding of the common envelope phase in the evolution of binary systems.

scholarly journals Mining of the Milky Way Star Archive Gaia-DR2. Searching for Binary Stars in Planetary Nebulae

Proceedings ◽  
2020 ◽  
Vol 54 (1) ◽  
pp. 52
Author(s):  
Iker González-Santamaría ◽  
Minia Manteiga ◽  
Carlos Dafonte ◽  
Arturo Manchado ◽  
Ana Ulla
Keyword(s):  
Binary Stars ◽  
Binary Systems ◽  
Planetary Nebulae ◽  
Central Star ◽  
Separation Distance ◽  
Proper Motions ◽  
Use Of Data ◽  
Stellar Sources ◽  
Stellar Envelopes ◽  
Gaia Dr2

The aim of this work is to search for binary stars associated to planetary nebulae (ionized stellar envelopes in expansion), by mining the astronomical archive of Gaia DR2, that is composed by around 1.7 billion stellar sources. For this task, we selected those objects with coincident astrometric parameters (parallaxes and proper motions) with the corresponding central star, among a sample of 211 planetary nebulae. By this method, we found eight binary systems, and we obtained their components positions, separations, temperatures and luminosities, as well as some of their masses and ages. In addition, we estimated the probability for each companion star of having been detected by chance and we analyzed how the number of false matches increase as the separation distance between both stars gets larger. All these procedures have been carried out making use of data mining techniques.

scholarly journals Towards a more complete sample of binary central stars of planetary nebulae with Gaia

2021 ◽  
Vol 648 ◽  
pp. A95
Author(s):  
N. Chornay ◽  
N. A. Walton ◽  
D. Jones ◽  
H. M. J. Boffin ◽  
M. Rejkuba ◽  
...  
Keyword(s):  
Binary Systems ◽  
Large Fraction ◽  
Planetary Nebulae ◽  
Close Binary ◽  
Close Binaries ◽  
Photometric Variability ◽  
Long Time ◽  
Using Data ◽  
Central Stars

Context. Many if not most planetary nebulae (PNe) are now thought to be the outcome of binary evolutionary scenarios. However, only a few percent of the PNe in the Milky Way are known to host binary systems. The high-precision repeated observing and long time baseline of Gaia make it well suited for detecting new close binaries through photometric variability. Aims. We aim to find new close binary central stars of PNe (CSPNe) using data from the Gaia mission, building towards a statistically significant sample of post-common envelope, close binary CSPNe. Methods. As the vast majority of Gaia sources do not have published epoch photometry, we used the uncertainty in the mean photometry as a proxy for determining the variability of our CSPN sample in the second Gaia data release. We derived a quantity that expresses the significance of the variability, and considered what is necessary to build a clean sample of genuine variable sources. Results. Our selection recovers a large fraction of the known close binary CSPN population, while other CSPNe lying in the same region of the parameter space represent a promising set of targets for ground-based confirmatory follow-up observations. Gaia epoch photometry for four of the newly identified variable sources confirms that the variability is genuine and consistent with binarity.

scholarly journals Radio Continuum Observations of Stellar Sources

1974 ◽  
Vol 60 ◽  
pp. 377-381
Author(s):  
L. L. E. Braes
Keyword(s):  
Binary Systems ◽  
Main Sequence ◽  
Early Stage ◽  
Planetary Nebulae ◽  
Radio Continuum ◽  
Red Dwarfs ◽  
Red Supergiants ◽  
Flare Stars ◽  
Stellar Sources

Thirty optically visible stellar sources have been observed in the radio continuum: four red dwarf flare stars, three novae, two red supergiants, eight binary systems, and 13 related peculiar objects. The observations of red dwarfs, novae, and supergiants are briefly reviewed. Their emission seems reasonably well understood. Binary systems such as Algol show erratic flaring; consistent explanations have not yet been given. The related peculiar objects, such as V1016 Cyg and MWC 349, are even less well understood. Some of them may have just arrived on the main sequence; others may be planetary nebulae in an early stage of formation.

scholarly journals The Far-Infrared (IRAS) Excess in Roberts 22 and Related Objects

1989 ◽  
Vol 8 ◽  
pp. 399-401
Author(s):  
M. Parthasarathy
Keyword(s):  
Angular Momentum ◽  
Mass Loss ◽  
Binary Systems ◽  
Planetary Nebulae ◽  
Far Infrared ◽  
Dust Shells ◽  
Thick Disks ◽  
Large Angular Momentum ◽  
Hr Diagram

ABSTRACTFrom an analysis of the IRAS data of Roberts 22,Ml-92,M2-9,OH 231.8+4.2,M1-91,MWC 922,Hen 401,Mz-3,OH 19.2-1.0 and OH 26.5+0.6 it is found that the characteristics of the dust shells or disks around these objects are similar to that observed in planetary nebulae. These ten objects may be described as transition objects evolving from the tip of AGB towards left in the HR diagram. The bipolar and disk geometry of the dust envelopes around these objects may be the result of large angular momentum of the progenitor star or the central objects may be evolved binary systems embedded in thick disks formed from severe mass loss.

scholarly journals Planetary Nebulae that Cannot Be Explained by Binary Systems

2017 ◽  
Vol 837 (1) ◽  
pp. L10 ◽  
Author(s):  
Ealeal Bear ◽  
Noam Soker
Keyword(s):  
Binary Systems ◽  
Planetary Nebulae

scholarly journals Wide binaries in planetary nebulae with Gaia DR2

2020 ◽  
Vol 644 ◽  
pp. A173
Author(s):  
I. González-Santamaría ◽  
M. Manteiga ◽  
A. Manchado ◽  
M. A. Gómez-Muñoz ◽  
A. Ulla ◽  
...  
Keyword(s):  
Binary Systems ◽  
Planetary Nebulae ◽  
Evolutionary Status ◽  
Evolutionary Stage ◽  
Proper Motions ◽  
Wide Binary ◽  
Additional Information ◽  
Formation And Evolution ◽  
Photometric Measurements ◽  
Central Stars

Context. The Gaia Data Release 2 (DR2) was used to select a sample of 211 central stars of planetary nebulae (CSPNe) with good-quality astrometric measurements, which we refer to as Golden Astrometry Planetary Nebulae (GAPN). Gaia astrometric and photometric measurements allowed us to derive accurate distances and radii and to calculate luminosities with the addition of self-consistent literature values. Such information was used to plot the position of these stars in a Hertzsprung-Russel diagram and to study their evolutionary status in comparison with the evolutionary tracks of CSPNe. Aims. The extremely precise measurement of parallaxes and proper motions in Gaia DR2 has allowed us to search for wide binary companions in a region close to each of the central stars in the GAPN sample. We are interested in establishing the presence of binary companions at large separations which could allow to contribute additional information on the influence of binarity on the formation and evolution of planetary nebulae. We aim to study the evolutive properties of the binary pairs to check the consistency of spectral types and masses in order to better constrain the ages and evolutionary stage of the CSPNe. Methods. We limited our search to a region around 20 000 AU of each CSPN to minimise accidental detections. We only considered stars with reasonably good parallax and proper motions data, that is, with errors below 30% in DR2. We determined that the hypothetical binary pairs should show a statistically significant agreement for the three astrometric quantities, that is, parallax and both components of the proper motions. Results. We found eight wide binary systems among our GAPN sample, including one in a triple system. We compiled the astrometric and photometric measurements of these binary systems and discussed them in relation to previously published searches for binaries in PNe. By analysing the position in the HR diagram of the companion stars using Gaia photometry, we are able to estimate their temperatures, luminosities, masses and, for one star, the evolutionary age. The derived quantities yield a consistent scenario when compared with the corresponding values as obtained for the central stars using stellar evolutionary models in the postAGB phase.

scholarly journals Post-AGB nebular studies

2016 ◽  
Vol 12 (S323) ◽  
pp. 20-27
Author(s):  
Eric Lagadec
Keyword(s):  
Binary Systems ◽  
Planetary Nebulae ◽  
Binary Interaction ◽  
Harsh Environment ◽  
Agb Stars

AbstractThis review presents the latest advances in the nebular studies of post-AGB objects. Post-AGB stars are great tools to test nucleosynthesis and evolution models for stars of low and intermediate masses, and the evolution of dust in harsh environment. I will present the newly discovered class of post-RGB stars, formed via binary interaction on the RGB. Binary systems can also lead to the formation of two class of aspherical post-AGB, the Proto-Planetary Nebulae and the naked post-AGBs (dusty RV Taus, a.k.a. Van Winckel’s stars).

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