Appraising the Necklace: A post-common-envelope carbon dwarf inside an apparently carbon-poor planetary nebula
arXiv:2601.19382 · doi:10.1051/0004-6361/202557784
Abstract
Context: The Necklace nebula is a bipolar, post-common-envelope planetary nebula, the central star of which has been shown to have a dwarf carbon star companion. Aims: We aim to understand the origins of the Necklace and its dwarf carbon central star. Methods: We study the carbon abundance of the nebula through far ultraviolet spectroscopy obtained with the Hubble Space Telescope. Furthermore, through simultaneous modelling of multiband light and velocity curves, we attempt to constrain the parameters of the central star system. Results: Puzzlingly, we find that the region of the inner nebula observed with the Hubble Space Telescope is seemingly not carbon-rich, at odds with the dwarf carbon star nature of the companion of the central star. The initial mass of the nebular progenitor was likely very close to the limit to become carbon-rich, perhaps experiencing a very late thermal pulse. The dwarf carbon star companion is found to be significantly inflated with respect to that expected for an isolated main sequence star of the same mass. Conclusions: The properties of the central binary are consistent with the progenitor having become carbon-rich and its companion having accreted a significant amount of that carbon-enriched material. However, it is unclear how this evolutionary hypothesis can be reconciled with the inner nebula potentially being carbon poor.
12 pages, 6 figures, accepted for publication in A&A
References in corpus (51)
- Astropy: A Community Python Package for Astronomy
- The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
- Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
- Correcting for the Effects of Interstellar Extinction
- Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
- Common Envelope Evolution: Where we stand and how we can move forward
- A new generation of PARSEC-COLIBRI stellar isochrones including the TP-AGB phase
- PyNeb: a new tool for analyzing emission lines. I. Code description and validation of results
- Stellar SEDs from 0.3-2.5 Microns: Tracing the Stellar Locus and Searching for Color Outliers in SDSS and 2MASS
- Post-Asymptotic Giant Branch Evolution of Low- and Intermediate-Mass Stars. Preliminary Results
- New models for the evolution of Post-Asymptotic Giant Branch stars and Central Stars of Planetary Nebulae
- Physics Of Eclipsing Binaries. II. Towards the Increased Model Fidelity
- The Initial-Final Mass Relation: Direct Constraints at the Low Mass End
- Physics of Eclipsing Binaries. V. General Framework for Solving the Inverse Problem
- The Hα surface brightness - radius relation: a robust statistical distance indicator for planetary nebulae
- Ionization Correction Factors for Planetary Nebulae: I- Using optical spectra
- Binary stars as the key to understanding planetary nebulae
- Collision Strengths for [O III] Optical and Infrared Lines
- A 3D extinction map of the Northern Galactic Plane based on IPHAS photometry
- Binarity and the abundance discrepancy problem in planetary nebulae
- Observational Confirmation of a Link Between Common Envelope Binary Interaction and Planetary Nebula Shaping
- The Necklace: equatorial and polar outflows from the binary central star of the new planetary nebula IPHASXJ194359.5+170901
- Confirmation of the link between central star binarity and extreme abundance discrepancy factors in planetary nebulae
- A catalogue of integrated H-alpha fluxes for 1,258 Galactic planetary nebulae
- Knots in the Helix Nebula found in H2
- Innocent Bystanders: Carbon Stars from the Sloan Digital Sky Survey
- Physics of Eclipsing Binaries. IV. The impact of interstellar extinction on the light curves of eclipsing binaries
- A carbon dwarf wearing a Necklace: first proof of accretion in a post-common-envelope binary central star of a planetary nebula with jets
- The post-common envelope central stars of the planetary nebulae Henize 2-155 and Henize 2-161
- A self-consistent stellar and 3D nebular model for Planetary Nebula IC418
- Proof of polar ejection fom the close-binary core of the planetary nebula Abell 63
- One star, two star, red star, blue star: an updated planetary nebula central star distance catalogue from Gaia EDR3
- IGAPS: the merged IPHAS and UVEX optical surveys of theNorthern Galactic Plane
- Atomic Data Assessment with PyNeb
- Bayesian posterior classification of planetary nebulae according to the Peimbert types
- Properties of carbon stars in the Solar neighbourhood based on Gaia DR2 astrometry
- The short orbital period binary star at the heart of the planetary nebula M 3-1
- Observational Constraints on the Common Envelope Phase
- Carbon dust in the evolved born-again planetary nebulae A30 and A78
- The bright blue side of the night sky: Spectroscopic survey of bright and hot (pre-) white dwarfs
- The post-common-envelope binary central star of the planetary nebula ETHOS 1
- The post-common-envelope binary central star of the planetary nebula Ou 5: a doubly-eclipsing post-red-giant-branch system
- Flows along cometary tails in the Helix planetary nebula NGC 7293
- PN-Carbon Yields and the Chemical Evolution of the Galactic Disk
- Unexpected Short-Period Variability in Dwarf Carbon Stars from the Zwicky Transient Facility
- The ionised and molecular mass of post-common-envelope planetary nebulae. The missing mass problem
- Carbon-enhanced stars with short orbital and spin periods
- The Binary Dwarf Carbon Star SDSS J125017.90+252427.6
- Infrared properties of Planetary Nebulae with [WR] and central stars
- MUSE spectroscopy of the high abundance discrepancy planetary nebula NGC 6153
- H fluxes and extinction distances for planetary nebulae in the IPHAS survey of the Northern Galactic Plane