Discovery of Volatile Gas in the Giant Impact Disk around the 150-Myr old HD 23514
arXiv:2506.20919 · doi:10.3847/2041-8213/ade872
Abstract
We report the discovery of CO gas emission around HD 23514, an F5V star in the 150 Myr-old Pleiades cluster, hosting one of the rare giant-impact disks with unique mineralogy dominated by silica dust. We show that the dust feature remains stable over several decades, and that the sub-m grains, which give rise to the 9 m feature, are co-spatial with the hot CO molecules within the sub-au vicinity of the star. Examining the Spitzer spectrum taken 15 years earlier, we show that the CO emission was also present at 4.3 significance. The existence of tiny silica grains and volatile gas requires special conditions to prevent the rapid loss caused by stellar radiation pressure and photodissociation. We explore several pathways explaining the observed properties and suggest that a past giant impact and/or stripping atmospheric event, involving large bodies with volatile content similar to the carbonaceous chondritic material, can simultaneously explain both the silica and volatile emission. Our discovery provides an important context for the amount of volatiles that a newly formed planet or the largest planetesimals could retain during the giant impact phase in the early solar system evolution.
arXiv commentaccepted for publication in ApJL; fixed typos; updated DOI
References in corpus (68)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
- The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
- dynesty: A Dynamic Nested Sampling Package for Estimating Bayesian Posteriors and Evidences
- The Eccentric Kozai-Lidov Effect and Its Applications
- Gas- and dust evolution in protoplanetary disks
- The AKARI/IRC Mid-Infrared All-Sky Survey
- The photodissociation and chemistry of CO isotopologues: applications to interstellar clouds and circumstellar disks
- Photodissociation and photoionisation of atoms and molecules of astrophysical interest
- Transience of hot dust around sun-like stars
- Modeling optical properties of cosmic dust grains using a distribution of hollow spheres
- CASSIS: The Cornell Atlas of Spitzer/IRS Sources
- Molecular Gas Clumps from the Destruction of Icy Bodies in the Pictoris Debris Disk
- Dust Migration and Morphology in Optically Thin Circumstellar Gas Disks
- Chemistry of atmospheres formed during accretion of the Earth and other terrestrial planets
- The Vega Debris Disk -- A Surprise from Spitzer
- Dust evolution in protoplanetary disks around Herbig Ae/Be stars - The Spitzer view
- Crystalline silicates and dust processing in the protoplanetary disks of the Taurus young cluster
- Abundant Circumstellar Silica Dust and SiO Gas Created by a Giant Hypervelocity Collision in the ~12 Myr HD172555 System
- Debris from terrestrial planet formation: the Moon-forming collision
- Detection of [Ne II] Emission from Young Circumstellar Disks
- The Frequency of Giant impacts on Earth-like Worlds
- Molecular gas in debris disks around young A-type stars
- ALMA observations of the Corvi debris disc: inward scattering of CO-rich exocomets by a chain of 3-30 M planets?
- Large Impacts around a Solar Analog Star in the Era of Terrestrial Planet Formation
- The bright end of the exo-Zodi luminosity function: Disk evolution and implications for exo-Earth detectability
- A 5D view of the Alpha Per, Pleiades, and Praesepe clusters
- Kuiper Belt-Like Hot and Cold Populations of Planetesimal Inclinations in the Pictoris Belt Revealed by ALMA
- High Resolution HST-STIS Spectra of CI and CO in the Beta Pictoris Circumstellar Disk
- Silica in Protoplanetary Disks
- Warm dust in the terrestrial planet zone of a sun-like Pleiad: collisions between planetary embryos?
- Dust Processing in Disks around T Tauri Stars
- A Self-Consistent Model of the Circumstellar Debris Created by a Giant Hypervelocity Impact in the HD172555 System
- The Decay of Debris Disks around Solar-Type Stars
- Survey of Surveys I: The largest catalogue of radial velocities for the Galaxy
- Variability of the Infrared Excess of Extreme Debris Disks
- An interferometric study of the Fomalhaut inner debris disk. III. Detailed models of the exozodiacal disk and its origin
- CO2 infrared emission as a diagnostic of planet-forming regions of disks
- Stellar activity with LAMOST - II. Chromospheric activity in open clusters
- Flares in Open Clusters with K2. I. M45 (Pleiades), M44 (Praesepe) and M67
- The effect of dust composition and shape on radiation-pressure forces and blowout sizes of particles in debris disks
- Magnetic grain trapping and the hot excesses around early-type stars
- LAMOST meets Gaia: The Galactic Open Clusters
- Extreme Debris Disk Variability -- Exploring the Diverse Outcomes of Large Asteroid Impacts During the Era of Terrestrial Planet Formation
- TESS observations of the Pleiades cluster: a nursery for delta Scuti stars
- Composition of Terrestrial Exoplanet Atmospheres from Meteorite Outgassing Experiments
- Silica-Rich Bright Debris Disk around HD 15407A
- A new sample of warm extreme debris disks from the ALLWISE catalog
- Is there more than meets the eye? Presence and role of submicron grains in debris discs
- Rocky Planet Formation: Quick and Neat
- A Substellar Companion to the Dusty Pleiades Star HD 23514
- An active asteroid belt causing the UX Ori phenomenon in RZ Psc
- Gas trapping of hot dust around main-sequence stars
- Herschel Observations of Dusty Debris Disks
- Carbon monoxide gas produced by a giant impact in the inner region of a young system
- Mid-infrared Studies of HD 113766 and HD 172555: Assessing Variability in the Terrestrial Zone of Young Exoplanetary Systems
- Planetesimals Around Stars with TESS (PAST): I. Transient Dimming of a Binary Solar Analog at the End of the Planet Accretion Era
- Mid-infrared bi-directional reflectance spectroscopy of impact melt glasses and tektites
- Warm Dusty Debris Disks and Distant Companion Stars: V488 Per and 2M1337
- Extreme Variability of the V488 Persei Debris Disk
- HD 145263: Spectral Observations of Silica Debris Disk Formation via Extreme Space Weathering?
- A Star-sized Impact-Produced Dust Clump in the Terrestrial Zone of the HD 166191 System
- Stellar Properties for a Comprehensive Collection of Star Forming Regions in the SDSS APOGEE-2 Survey
- CLIcK: a Continuum and Line fItting Kit for circumstellar disks
- Highly structured inner planetary system debris around the intermediate age Sun-like star TYC 8830 410 1
- Radial-velocity search and statistical studies for short-period planets in the Pleiades open cluster
- An ALMA 1.3 millimeter Search for Debris Disks around Solar-type Stars in the Pleiades
- Abundant sub-micron grains revealed in newly discovered extreme debris discs