Results 1 to 10 of about 4,157,833 (252)
The Astrophysical JournalWe present the Atacama Large Millimeter/submillimeter Array Survey of Gas Evolution of PROtoplanetary Disks (AGE-PRO), a large program of the ALMA. AGE-PRO aims to systematically trace the evolution of gas disk mass and size throughout the lifetime of ...
Ke Zhang +21 more
doaj +1 more source
Vortex-induced Rings and Gaps within Protoplanetary Disks
The Astrophysical JournalObservations of protoplanetary disks have revealed the presence of both crescent-shaped and ring-like structures in dust continuum emission. These crescents are thought to arise from dust-trapping vortices generated by the Rossby wave instability, which ...
Xiaoyi Ma +3 more
doaj +1 more source
Broadening the Canonical Picture of EUV-driven Photoevaporation of Accretion Disks
The Astrophysical JournalPhotoevaporation driven by hydrogen-ionizing extreme-ultraviolet (EUV) radiation profoundly shapes the lives of diverse astrophysical objects. We construct an analytical model accounting for the finite timescales of photoheating and photoionization and ...
Riouhei Nakatani +2 more
doaj +1 more source
Water Enrichment from Pebble Drift in Disks with Gap-forming Planets
The Astrophysical JournalVolatiles like H _2 O are present as ice in solids in the cold outer regions of protoplanetary disks and as vapor in the warm inner regions within the water snow line.
Whittney Easterwood +2 more
doaj +1 more source
High Resolution ALMA Data of the Fomalhaut Debris Disk Confirms Apsidal Width Variation
The Astrophysical Journal LettersWe 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 $\mathop{.}\limits{^
Jay S. Chittidi +13 more
doaj +1 more source
The Astrophysical Journal LettersGas surface density is one of the most relevant physical quantities in protoplanetary disks. However, its precise measurement remains highly challenging due to the lack of a direct tracer.
Tomohiro C. Yoshida +33 more
doaj +1 more source
The Astrophysical JournalWe performed linear calculations to determine the Type I planetary migration rate for 3D locally isothermal disks with radial temperature gradients. For 3D disks with radial temperature gradients, the linear wave equation has a divergent term of the ...
Hidekazu Tanaka, Kohei Okada
doaj +1 more source
Disk Lifetime Distribution as a Function of the Mass of Host Star
The Astrophysical JournalThe lifetime of protoplanetary disks is a critical factor for planet formation. Although the mean disk lifetime provides an estimate of the typical period available for planet formation, it does not capture the substantial variability in individual disk ...
Susanne Pfalzner +3 more
doaj +1 more source
The Astrophysical JournalRetrieving dust properties in protoplanetary disks, including the surface density distribution, temperature, and grain size distribution, is a fundamental task in observational studies of planet formation.
Tomohiro C. Yoshida +5 more
doaj +1 more source
exoALMA. XV. Interpreting the Height of CO Emission Layer
The Astrophysical Journal LettersThe availability of exquisite data and the development of new analysis techniques have enabled the study of emitting heights in protoplanetary disks. In this paper, we introduce a simple model linking the emitting height of CO to the disk surface density
Giovanni P. Rosotti +34 more
doaj +1 more source