Explanipedia

A Multiline Analysis of the Distribution and Excitation of CS and H<sub>2</sub>CS in the HD 163296 Disk Open

Charles J. Law, Romane Le Gal, Yoshihide Yamato, Ke Zhang, Viviana V. Guzmán , et al. · 2025

The abundance and distribution of sulfur-bearing molecules in protoplanetary disks directly influence the composition and potential habitability of nascent planets in addition to providing powerful probes of the physical gas conditions in …

The Large Interferometer For Exoplanets (LIFE): a space mission for mid-infrared nulling interferometry Open

Adrian M. Glauser, Sascha P. Quanz, Jonah T. Hansen, Felix Dannert, Michael J. Ireland , et al. · 2024

© 2024 Society of Photo-Optical Instrumentation Engineers (SPIE). This is the accepted manuscript version of a conference paper which has been published in final form at https://doi.org/10.1117/12.3019090

A Survey of Protoplanetary Disks Using the Keck/NIRC2 Vortex Coronagraph Open

Nicole L. Wallack, Jean-Baptiste Ruffio, Garreth Ruane, Bin Ren, Jerry W. Xuan , et al. · 2024

Recent Atacama Large Millimeter/submillimeter Array (ALMA) observations of protoplanetary disks in the millimeter continuum have shown a variety of radial gaps, cavities, and spiral features. These substructures may be signposts for ongoin…

Dust properties across the Co snowline in the HD 163296 disk from ALMA and VLA observations Open

Greta Guidi, Marco Tazzari, L. Testi, I. de Gregorio‐Monsalvo, C. J. Chandler , et al. · 2024

Context. To characterize the mechanisms of planet formation it is crucial to investigate the properties and evolution of protoplanetary disks around young stars, where the initial conditions for the growth of planets are set. The high spat…

Distribution of solids in the rings of the HD 163296 disk: a multiwavelength study Open

Greta Guidi, Andrea Isella, L. Testi, C. J. Chandler, Hauyu Baobab Liu , et al. · 2022

Context. Observations at millimeter wavelengths of bright protoplanetary disks have shown the ubiquitous presence of structures such as rings and spirals in the continuum emission. The derivation of the underlying properties of the emittin…

Large Interferometer For Exoplanets (LIFE) Open

Sascha P. Quanz, Maurice Ottiger, E. Fontanet, Jens Kammerer, Franziska Menti , et al. · 2022

Context. One of the long-term goals of exoplanet science is the atmospheric characterization of dozens of small exoplanets in order to understand their diversity and search for habitable worlds and potential biosignatures. Achieving this g…

ALMA multi-wavelength study of the HD 163296 disk: measuring local variations of dust properties Open

Greta Guidi · 2019

HD 163296 is a nearby bright protplanetary disk, presenting a ringed-like structure thats has been associated with the presence of forming planets. We obtained new observations of this targets at 2 and 3 mm with ALMA, that allowed us to de…

A dust and gas cavity in the disc around CQ Tau revealed by ALMA Open

Maria Giulia Ubeira-Gabellini, A. Miotello, Stefano Facchini, Enrico Ragusa, Giuseppe Lodato , et al. · 2019

The combination of high-resolution and sensitivity offered by ALMA is revolutionizing our understanding of protoplanetary discs, as their bulk gas and dust distributions can be studied independently. In this paper we present resolved ALMA …

High-contrast imaging of HD 163296 with the Keck/NIRC2 L′-band vortex coronograph Open

Greta Guidi, Garreth Ruane, Jonathan P. Williams, Dimitri Mawet, L. Testi , et al. · 2018

We present observations of the nearby (D$\\sim$100\\,pc) Herbig star HD~163296\ntaken with the vortex coronograph at Keck/NIRC2 in the L' band (3.7~$\\mu$m), to\nsearch for planetary mass companions in the ringed disc surrounding this\npre…

ALMA Survey of Lupus Protoplanetary Disks II: Gas Disk Radii Open

Megan Ansdell, Jonathan P. Williams, Leon Trapman, Sierk van Terwisga, Stefano Facchini , et al. · 2018

We present ALMA Band 6 observations of a complete sample of protoplanetary disks in the young (1-3 Myr) Lupus star-forming region, covering the 1.33 mm continuum and the 12CO, 13CO, and C18O J=2-1 lines. The spatial resolution is 0.25 arcs…

From dust to planets: high resolution observations of small-scale structures in evolving protoplanetary disks Open

Greta Guidi · 2018

This thesis work aimed at studying the first stages planet formation, focusing on protoplanetary disks of gas and dust around pre-main sequence stars. During their relatively short life (≥ 5 Million years) disks are expected to give origin…

Physical properties of dusty protoplanetary disks in Lupus: evidence for viscous evolution? Open

Marco Tazzari, L. Testi, A. Natta, Megan Ansdell, John M. Carpenter , et al. · 2017

Context. The formation of planets strongly depends on the total amount as well as on the spatial distribution of solids in protoplanetary disks. Thanks to the improvements in resolution and sensitivity provided by ALMA, measurements of the…

Lupus disks with faint CO isotopologues: low gas/dust or high carbon depletion? Open

A. Miotello, E. F. van Dishoeck, Jonathan P. Williams, Megan Ansdell, Greta Guidi , et al. · 2017

Context. An era has started in which gas and dust can be observed independently in protoplanetary disks, thanks to the recent surveys with the Atacama Large Millimeter/sub-millimeter Array (ALMA). The first near-complete high-resolution di…

ALMA SURVEY OF LUPUS PROTOPLANETARY DISKS. I. DUST AND GAS MASSES Open

Megan Ansdell, Jonathan P. Williams, Nienke van der Marel, John M. Carpenter, Greta Guidi , et al. · 2016

We present the first high-resolution sub-millimeter survey of both dust and gas for a large population of protoplanetary disks. Characterizing fundamental properties of protoplanetary disks on a statistical level is critical to understandi…

Evidence for a correlation between mass accretion rates onto young stars and the mass of their protoplanetary disks Open

C. F. Manara, Giovanni Rosotti, L. Testi, A. Natta, J. M. Alcalá , et al. · 2016

A relation between the mass accretion rate onto the central young star and the mass of the surrounding protoplanetary disk has long been theoretically predicted and observationally sought. For the first time, we have accurately and homogen…

Italian Science Case for ALMA Band 2+3 Open

M. T. Beltrán, E. Bianchi, J. Brand, V. Casasola, R. Cesaroni , et al. · 2015

The Premiale Project "Science and Technology in Italy for the upgraded ALMA Observatory - iALMA" has the goal of strengthening the scientific, technological and industrial Italian contribution to the Atacama Large Millimeter/submillimeter …

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