Explanipedia

Resolving the terrestrial planet-forming region of HD 172555 with ALMA: I. Post-impact dust distribution Open

Zoe Roumeliotis, Luca Matrà, Grant M. Kennedy, Sebastián Marino, K. Y. L. Su , et al. · 2025

Giant impacts between planetary embryos are a natural step in the terrestrial planet formation process and are expected to create disks of warm debris in the terrestrial regions of their stars. Understanding the gas and dust debris produce…

Discovery of H<i>α</i> Emission from a Protoplanet Candidate around the Young Star 2MASS J16120668–3010270 with MagAO-X Open

Jialin Li, Laird M. Close, Feng Long, Jared R. Males, Sebastiaan Y. Haffert , et al. · 2025

2MASS J16120668–3010270 (hereafter 2MJ1612) is a young M0 star that hosts a protoplanetary disk in the Upper Scorpius star-forming region. Recent Atacama Large Millimeter/submillimeter Array (ALMA) observations of 2MJ1612 show a mildly inc…

High Resolution ALMA Data of the Fomalhaut Debris Disk Confirms Apsidal Width Variation Open

Jay S. Chittidi, Meredith A. MacGregor, Joshua B. Lovell, Gaspard Duchêne, M. C. Wyatt , et al. · 2025

We present long-baseline observations of the Fomalhaut outer debris disk at 223 GHz (1.3 mm) from Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 5, which we use along with archival short-baseline observations to produce a 0 …

Discovery of Volatile Gas in the Giant Impact Disk Around the 150 Myr Old HD 23514 Open

K. Y. L. Su, A. Moór, Chengyan Xie, Ilaria Pascucci, G. H. Rieke , et al. · 2025

We report the discovery of CO 2 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 remai…

Evidence for a sub-Jovian planet in the young TWA 7 disk Open

A.‐M. Lagrange, C. Wilkinson, Mathilde Mâlin, A. Boccaletti, C. Perrot , et al. · 2025

Planets are thought to form from dust and gas in protoplanetary disks, with debris disks being the remnants of planet formation. Aged a few million up to a few billion years, debris disks have lost their primordial gas, and their dust is p…

REsolved ALMA and SMA Observations of Nearby Stars (REASONS): A population of 74 resolved planetesimal belts at millimetre wavelengths Open

Luca Matrà, S. Marino, David J. Wilner, G. M. Kennedy, Mark Booth , et al. · 2025

Planetesimal belts are ubiquitous around nearby stars, and their spatial properties hold crucial information for planetesimal and planet formation models. We present resolved dust observations of 74 planetary systems as part of the REsolve…

Imaging of the Vega Debris System Using JWST/MIRI Open

K. Y. L. Su, András Gáspár, G. H. Rieke, Renu Malhotra, Luca Matrà , et al. · 2024

We present images of the Vega planetary debris disk obtained at 15.5, 23, and 25.5 μ m with the Mid-Infrared Instrument on JWST. The debris system is remarkably symmetric, smooth, and centered accurately on the star. There is a broad Kuipe…

Deep Search for a Scattered Light Dust Halo Around Vega with the Hubble Space Telescope Open

Schuyler Wolff, András Gáspár, G. H. Rieke, Jarron Leisenring, K. Y. L. Su , et al. · 2024

We present a provisory scattered-light detection of the Vega debris disk using deep Hubble Space Telescope (HST) coronagraphy (PID 16666). At only 7.7 pc, Vega is immensely important in debris disk studies both for its prominence and also …

REsolved ALMA and SMA Observations of Nearby Stars (REASONS) Open

Luca Matrà, S. Marino, D.J. Wilner, Grant M. Kennedy, Mark Booth , et al. · 2024

Context . Planetesimal belts are ubiquitous around nearby stars, and their spatial properties hold crucial information for planetesimal and planet formation models. Aims . We present resolved dust observations of 74 planetary systems as pa…

Imaging of the Vega Debris System using JWST/MIRI Open

K. Y. L. Su, Andras Gaspar, G. H. Rieke, Renu Malhotra, Luca Matrà , et al. · 2024

We present images of the Vega planetary debris disk obtained at 15.5, 23, and 25.5 microns with the Mid-Infrared Instrument (MIRI) on JWST. The debris system is remarkably symmetric and smooth, and centered accurately on the star. There is…

Low CI/CO abundance ratio revealed by <i>HST</i> UV spectroscopy of CO-rich debris discs Open

Aoife Brennan, Luca Matrà, Sebastián Marino, David J. Wilner, Chunhua Qi , et al. · 2024

The origin and evolution of CO gas in debris discs has been debated since its initial detection. The gas could have a primordial origin, as a remnant of the protoplanetary disc or a secondary exocometary origin. This paper investigates the…

Low CI/CO Abundance Ratio Revealed by HST UV Spectroscopy of CO-rich Debris Disks Open

Aoife Brennan, Luca Matrà, Sebastián Marino, David J. Wilner, Chunhua Qi , et al. · 2024

The origin and evolution of CO gas in debris disks has been debated since its initial detection. The gas could have a primordial origin, as a remnant of the protoplanetary disk or a secondary exocometary origin. This paper investigates the…

The Hybrid Debris Disk Host Star HD 21997 is a High-frequency Delta Scuti Pulsator Open

Aldo G. Sepulveda, T. R. Bedding, Simon J. Murphy, Luca Matrà, Daniel Huber , et al. · 2024

HD 21997 is host to a prototypical “hybrid” debris disk characterized by debris disk-like dust properties and a CO gas mass comparable to a protoplanetary disk. We use Transiting Exoplanet Survey Satellite time series photometry to demonst…

The Hybrid Debris Disk Host Star HD 21997 is a High-Frequency Delta Scuti Pulsator Open

Aldo G. Sepulveda, T. R. Bedding, Simon J. Murphy, Luca Matrà, Daniel Huber , et al. · 2024

HD 21997 is host to a prototypical "hybrid" debris disk characterized by debris disk-like dust properties and a CO gas mass comparable to a protoplanetary disk. We use Transiting Exoplanet Survey Satellite time series photometry to demonst…

Vertical Structure of Gas and Dust in Four Debris Disks Open

Kadin Worthen, Christine Chen, S. Brittain, Cicero X. Lu, Isabel Rebollido , et al. · 2024

We present high-spectral-resolution M -band spectra from iSHELL on NASA’s Infrared Telescope Facility along the line of sight to the debris disk host star HD 32297. We also present a Gemini Planet Imager H -band polarimetric image of the H…

Vertical Structure of Gas and Dust in Four Debris Disks Open

Kadin Worthen, Christine Chen, S. Brittain, Cicero X. Lu, Isabel Rebollido , et al. · 2023

We present high-spectral resolution M-band spectra from iSHELL on NASA's Infrared Telescope Facility (IRTF) along the line of sight to the debris disk host star HD 32297. We also present a Gemini Planet Imager (GPI) H-band polarimetric ima…

An ALMA Survey of M-dwarfs in the Beta Pictoris Moving Group with Two New Debris Disc Detections Open

Patrick F Cronin-Coltsmann, Grant M. Kennedy, Quentin Kral, Jean‐François Lestrade, Sebastián Marino , et al. · 2023

Previous surveys in the far-infrared have found very few, if any, M-dwarf debris discs among their samples. It has been questioned whether M-dwarf discs are simply less common than earlier types, or whether the low detection rate derives f…

Planetary system architectures with low-mass inner planets Open

C. Desgrange, J. Milli, G. Chauvin, Th. Henning, Anna Luashvili , et al. · 2023

Context. The discovery of planets orbiting at less than 1 au from their host star and less massive than Saturn in various exoplanetary systems revolutionized our theories of planetary formation. The fundamental question is whether these cl…

An ALMA Survey of M-dwarfs in the Beta Pictoris Moving Group with two new debris disc detections Open

Patrick F Cronin-Coltsmann, Grant M. Kennedy, Quentin Kral, Jean‐François Lestrade, Sebastián Marino , et al. · 2023

Previous surveys in the far-infrared have found very few, if any, M-dwarf debris discs among their samples. It has been questioned whether M-dwarf discs are simply less common than earlier types, or whether the low detection rate derives f…

Planetary system architectures with low-mass inner planets: Direct imaging exploration of mature systems beyond 1 au Open

C. Desgrange, Julien Milli, G. Chauvin, Thomas Henning, Anna Luashvili , et al. · 2023

The discovery of planets orbiting at less than 1 au from their host star and less massive than Saturn in various exoplanetary systems revolutionized our theories of planetary formation. The fundamental question is whether these close-in lo…

Primordial or Secondary? Testing Models of Debris Disk Gas with ALMA* Open

Gianni Cataldi, Yuri Aikawa, Kazunari Iwasaki, Sebastián Marino, A. Brandeker , et al. · 2023

The origin and evolution of gas in debris disks are still not well understood. Secondary gas production from cometary material or a primordial origin have been proposed. So far, observations have mostly concentrated on CO, with only a few …

Primordial or Secondary? Testing models of debris disk gas with ALMA Open

Gianni Cataldi, Yuri Aikawa, Kazunari Iwasaki, Sebastián Marino, A. Brandeker , et al. · 2023

The origin and evolution of gas in debris disks is still not well understood. Secondary gas production from cometary material or a primordial origin have been proposed. So far, observations have mostly concentrated on CO, with only few C o…

An SMA Survey of Chemistry in Disks Around Herbig AeBe Stars Open

Jamila Pegues, Karin I. Öberg, Chunhua Qi, Sean M. Andrews, Jane Huang , et al. · 2023

Protoplanetary disks around Herbig AeBe stars are exciting targets for studying the chemical environments where giant planets form. Save for a few disks, however, much of Herbig AeBe disk chemistry is an open frontier. We present a Submill…

Inner edges of planetesimal belts: collisionally eroded or truncated? Open

Amaia Imaz Blanco, Sebastián Marino, Luca Matrà, Mark Booth, John M. Carpenter , et al. · 2023

The radial structure of debris discs can encode important information about their dynamical and collisional history. In this paper, we present a three-phase analytical model to analyse the collisional evolution of solids in debris discs, f…

Inner edges of planetesimal belts: collisionally eroded or truncated? Open

Amaia Imaz Blanco, Sebastián Marino, Luca Matrà, Mark Booth, John F. Carpenter , et al. · 2023

The radial structure of debris discs can encode important information about their dynamical and collisional history. In this paper we present a 3-phase analytical model to analyse the collisional evolution of solids in debris discs, focusi…

Interstellar Objects and Exocomets Open

A. Fitzsimmons, Karem Meech, Luca Matrà, Susanne Pfalzner · 2023

In this chapter we review our knowledge of our galaxy's cometary population outside our Oort Cloud - exocomets and Interstellar Objects (ISOs). We start with a brief overview of planetary system formation, viewed as a general process aroun…

An SMA Survey of Chemistry in Disks around Herbig AeBe Stars Open

Jamila Pegues, Karin I. Öberg, Chunhua Qi, Sean M. Andrews, Jane Huang , et al. · 2023

Protoplanetary disks around Herbig AeBe stars are exciting targets for studying the chemical environments where giant planets form. Save for a few disks, however, much of Herbig AeBe disk chemistry is an open frontier. We present a Submill…

ALMA Observations of the HD 110058 Debris Disk Open

Antonio Hales, Sebastián Marino, Patrick Sheehan, Silvio Ulloa, Sebastián Pérez , et al. · 2022

We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of the young, gas-rich debris disk around HD 110058 at 0.″3–0.″6 resolution. The disk is detected in the 0.85 and 1.3 mm continuum, as well as the J = 2–1 and J = …

Potential effects of stellar winds on gas dynamics in debris disks leading to observable belt winds Open

Quentin Kral, J. E. Pringle, Luca Matrà, P. Thébault · 2022

Context. Gas has been successfully detected in many extrasolar systems around mature stars aged between 10 Myr and ∼1 Gyr that include planetesimal belts. Gas in these mature disks is thought to be released from planetesimals and has been …

Stellar winds can affect gas dynamics in debris disks and create observable belt winds Open

Quentin Kral, James Pringle, Luca Matrà, P. Thébault · 2022

Context: Gas is now detected in many extrasolar systems around mature stars aged between 10 Myr to $\sim$ 1 Gyr with planetesimal belts. Gas in these mature disks is thought to be released from planetesimals and has been modelled using a v…

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