Extreme Variability of the V488 Persei Debris Disk

Abstract

V488 Persei is the most extreme debris disk known in terms of the fraction of the stellar luminosity it intercepts and reradiates. The infrared output of its disk is extremely variable, similar in this respect to the most variable disk known previously, that around ID8 in NGC 2547. We show that the variations are likely to be due to collisions of large planetesimals (> 100 km in diameter) in a belt being stirred gravitationally by a planetary or low-mass-brown-dwarf member of a planetary system around the star. The dust being produced by the resulting collisions is falling into the star due to drag by the stellar wind. The indicated planetesimal destruction rate is so high that it is unlikely that the current level of activity can persist for much longer than ~ 1000 - 10,000 years, and it may signal a major realignment of the configuration of the planetary system.

ApJ, in press

References in corpus (18)

• Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 parsecs: The Southern Sample
• Revising the ages of planet-hosting stars
• The History of the Solar System's Debris Disc: Observable Properties of the Kuiper Belt
• Large Impacts around a Solar Analog Star in the Era of Terrestrial Planet Formation
• Warm dust in the terrestrial planet zone of a sun-like Pleiad: collisions between planetary embryos?
• Variability of the Infrared Excess of Extreme Debris Disks
• Planetary Collisions outside the Solar System: Time Domain Characterization of Extreme Debris Disks
• Debris Disks in NGC 2547
• The effect of dust composition and shape on radiation-pressure forces and blowout sizes of particles in debris disks
• A statistically significant lack of debris discs in medium separation binary systems
• New HST data and modeling reveal a massive planetesimal collision around Fomalhaut
• Near-infrared emission from sublimating dust in collisionally active debris disks
• Extreme Debris Disk Variability -- Exploring the Diverse Outcomes of Large Asteroid Impacts During the Era of Terrestrial Planet Formation
• The first 40 million years of circumstellar disk evolution: the signature of terrestrial planet formation
• A new sample of warm extreme debris disks from the ALLWISE catalog
• The differential rotation of epsilon Eri from MOST data
• No significant correlation between radial velocity planet presence and debris disc properties
• Warm Dusty Debris Disks and Distant Companion Stars: V488 Per and 2M1337

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• Mid-infrared time-domain study of recent dust production events in the extreme debris disc of TYC 4209-1322-1
• Abundant sub-micron grains revealed in newly discovered extreme debris discs
• Isolating the extreme debris disc signature -- explorations of eccentric extreme debris discs formed by giant impacts
• On The Unusual Variability of 2MASS J06195260-2903592: A Long-Lived Disk around a Young Ultracool Dwarf