On the unusual gas composition in the Beta Pictoris debris disk

Abstract

The metallic gas associated with the Beta Pic debris disk is not believed to be primordial, but arises from the destruction of dust grains. Recent observations have shown that carbon and oxygen in this gas are exceptionally overabundant compared to other elements, by some 400 times. We study the origin of this enrichment under two opposing hypothesis, preferential production, where the gas is produced with the observed unusual abundance (as may happen if gas is produced by photo-desorption from C/O-rich icy grains), and preferential depletion, where the gas evolves to the observed state from an original solar abundance (if outgassing occurs under high-speed collisions) under a number of dynamical processes. We include ... ... We find ... ...

accepted to ApJ, revised text is highlighted in red color, the old figure 2 is removed, other figures are revised

References in corpus (11)

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Cited by in corpus (16)

• Debris Disks: Structure, Composition, and Variability
• Molecular Gas Clumps from the Destruction of Icy Bodies in the $\beta$ Pictoris Debris Disk
• A self-consistent model for the evolution of the gas produced in the debris disc of $\beta$ Pictoris
• Radial Surface Density Profiles of Gas and Dust in the Debris Disk around 49 Ceti
• Herschel Observations of Gas and Dust in the Unusual 49 Ceti Debris Disk
• Herschel HIFI observations of ionised carbon in the β Pictoris debris disk
• ALMA resolves CI emission from the $\beta$ Pictoris debris disk
• Volatile-Rich Circumstellar Gas in the Unusual 49 Ceti Debris Disk
• Herschel detects oxygen in the beta Pictoris debris disk
• Formation of secondary atmospheres on terrestrial planets by late disk accretion
• Lambda Boo Abundance Patterns: Accretion from Orbiting Sources
• The interplay between radiation pressure and the photoelectric instability in optically thin disks of gas and dust
• Detection of Nitrogen gas in the $\beta$ Pictoris circumstellar disk
• Circumstellar discs: What will be next?
• A Radiatively Driven Wind from the eta Tel Debris Disk
• Upper limits on the water vapour content of the $\beta$ Pictoris debris disk