Forming equatorial rings around dying stars

Abstract

We suggest that clumpy-dense outflowing equatorial rings around evolved giant stars, such as in supernova 1987A and the Necklace planetary nebula, are formed by bipolar jets that compress gas toward the equatorial plane. The jets are launched from an accretion disk around a stellar companion. Using the FLASH hydrodynamics numerical code we perform 3D numerical simulations, and show that bipolar jets expanding into a dense spherical shell can compress gas toward the equatorial plane and lead to the formation of an expanding equatorial ring. Rayleigh-Taylor instabilities in the interaction region break the ring to clumps. Under the assumption that the same ring-formation mechanism operates in massive stars and in planetary nebulae, we find this mechanism to be more promising for ring formation than mass loss through the second Lagrangian point. The jets account also for the presence of a bipolar nebula accompanying many of the rings.

Revision after referee report

References in corpus (14)

• Modules for Experiments in Stellar Astrophysics (MESA)
• The 2008 Luminous Optical Transient in the Nearby Galaxy NGC 300
• Discovery of a nearby twin of SN1987A's nebula around the luminous blue variable HD168625: Was Sk--69 202 an LBV?
• Multiple ring nebulae around blue supergiants
• A Spitzer/IRS Spectrum of the 2008 Luminous Transient in NGC 300: Connection to Proto-Planetary Nebulae
• High-resolution radio observations of SNR 1987A at high frequencies
• V838 Monocerotis: the central star and its environment a decade after outburst
• Multi-dimensional simulations of the expanding supernova remnant of SN 1987A
• Expansion of hydrogen-poor knots in the born-again planetary nebulae A30 and A78
• A Model for the Formation of Large Circumbinary Disks Around Post AGB Stars
• Common Powering Mechanism of Intermediate Luminosity Optical Transients and Luminous Blue Variables
• Sher 25: pulsating but apparently alone
• Final common envelope ejection by migration and jets
• NGC 6309, a Planetary Nebula that Shifted from Round to Multipolar

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