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The Rosseland mean opacity of dust in protoplanetary disks is often calculated assuming the interstellar medium (ISM) size distribution and a constant dust-to-gas ratio. However, the dust size distribution and the dust-to-gas ratio in…

Earth and Planetary Astrophysics · Physics 2021-09-28 Yayaati Chachan , Eve J. Lee , Heather A. Knutson

The size and density of dust grains determine their response to gas drag in protoplanetary discs. Aerodynamical (size x density) sorting is one of the proposed mechanisms to explain the grain properties and chemical fractionation of…

Earth and Planetary Astrophysics · Physics 2017-05-31 Francesco C. Pignatale , Jean-François Gonzalez , Nicolas Cuello , Bernard Bourdon , Caroline Fitoussi

The impact of stellar multiplicity on the evolution of planet-forming disks is still the subject of debate. Here we present and analyze disk structures around ten multiple stellar systems that were included in an unbiased, high spatial…

High-angular resolution imaging by ALMA has revealed the near-universality and diversity of substructures in protoplanetary disks. However, disks around M-type pre-main-sequence stars are still poorly sampled, despite the prevalence of…

Aims: Response of a protoplanetary disk to luminosity bursts of various duration is studied with the purpose to determine the effect of the bursts on the strength and sustainability of gravitational instability in the disk. A special…

Solar and Stellar Astrophysics · Physics 2020-10-28 E. I. Vorobyov , V. Elbakyan , Michihiro Takami , Hauyu Baobab Liu

For revealing the first step of the plant formation, it is important to understand how and when dust grains become larger in a disk around a protostar. To investigate the grain growth, we analyze dust continuum emission toward a disk around…

Earth and Planetary Astrophysics · Physics 2022-07-06 Satoshi Ohashi , Hiroshi Kobayashi , Jinshi Sai , Nami Sakai

We present the first high-resolution sub-mm 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 understanding how…

We present sensitive, sub-arcsecond resolution Submillimeter Array observations of the protoplanetary disk around the nearby, pre-main sequence spectroscopic binary V4046 Sgr. We report for the first time a large inner hole (r=29 AU)…

Solar and Stellar Astrophysics · Physics 2015-06-16 Katherine A. Rosenfeld , Sean M. Andrews , David J. Wilner , J. H. Kastner , M. K. McClure

We present high spatial resolution observations of the continuum emission from the young multiple star system UZ Tau at frequencies from 6 to 340 GHz. To quantify the spatial variation of dust emission in the UZ Tau E circumbinary disk, the…

Disk galaxies at intermediate redshift ($z\sim0.7$) have been found in previous work to display more optically thick behaviour than their local counterparts in the rest-frame B-band surface brightness, suggesting an evolution in dust…

Astrophysics of Galaxies · Physics 2018-09-13 S. K. Leslie , M. T. Sargent , E. Schinnerer , B. Groves , A. van der Wel , G. Zamorani , Y. Fudamoto , P. Lang , V. Smolčić

The excess emission seen in spectral energy distributions (SEDs) is commonly used to infer the properties of the emitting circumstellar dust in protoplanetary and debris discs. Most notably, dust size distributions and details of the…

Earth and Planetary Astrophysics · Physics 2020-09-16 Torsten Löhne

We present a scenario for the formation of disks which explains not only the properties of normal galaxies, but the properties of the population of low surface brightness galaxies (LSBs) as well. We use a gravitationally self-consistent…

Astrophysics · Physics 2009-10-28 J. J. Dalcanton , D. N. Spergel , F J Summers

The disk mass is among the most important input parameter for every planet formation model to determine the number and masses of the planets that can form. We present an ALMA 887micron survey of the disk population around objects from 2 to…

Millimeter and sub-millimeter observations of continuum linear dust polarization provide insight into dust grain growth in protoplanetary disks, which are the progenitors of planetary systems. We present the results of the first survey of…

Solar and Stellar Astrophysics · Physics 2024-04-17 Rachel E. Harrison , Zhe-Yu Daniel Lin , Leslie W. Looney , Zhi-Yun Li , Haifeng Yang , Ian Stephens , Manuel Fernández-López

Protoplanetary disks with large inner dust cavities are thought to host massive planetary or substellar companions. These disks show asymmetries and rings in the millimeter continuum, caused by dust trapping in pressure bumps, and…

ALMA observations of protoplanetary disks confirm earlier indications that there is a clear difference between the dust and gas radial extents. The origin of this difference is still debated, with both radial drift of the dust and optical…

Solar and Stellar Astrophysics · Physics 2017-09-06 Stefano Facchini , Til Birnstiel , Simon Bruderer , Ewine F. van Dishoeck

We present near and mid-infrared interferometric observations made with the Keck Interferometer Nuller and near-contemporaneous spectro-photometry from the IRTF of 11 well known young stellar objects, several observed for the first time in…

The inner regions of protoplanetary disks are the locations where most of planets are thought to form and where processes that influence the global evolution of the disk, such as MHD-winds and photoevaporation, originate. Transition disks…

Earth and Planetary Astrophysics · Physics 2024-02-01 Alessia A. Rota , Jurrian D. Meijerhof , Nienke van der Marel , Logan Francis , Floris S. van der Tak , Andrew D. Sellek

Scattered light images of the optically thin dust disk around the 5 Myr old star HD141569 have revealed its complex asymmetric structure. We show in this paper that the surface density inferred from the observations presents similarities…

Astrophysics · Physics 2009-11-10 J. C. Augereau , J. C. B. Papaloizou

Luminosity bursts in young FU Orionis-type stars warm up the surrounding disks of gas and dust, thus inflicting changes on their morphological and chemical composition. In this work, we aim at studying the effects that such bursts may have…

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