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Understanding planet formation requires to discern how dust grows in protoplanetary disks. An important parameter to measure in disks is the maximum dust grain size present. This is usually estimated through measurements of the dust opacity…

Rings and radial gaps are ubiquitous in protoplanetary disks, yet their possible connection to planet formation is currently subject to intense debates. In principle, giant planet formation leads to wide gaps which separate the gas and dust…

Earth and Planetary Astrophysics · Physics 2019-06-26 Sebastián Pérez , Simon Casassus , Clément Baruteau , Ruobing Dong , Antonio Hales , Lucas Cieza

[Abridged] We imaged a 2' x 2' region of the Orion Nebula cluster in 1.3 mm wavelength continuum emission with the recently commissioned Combined Array for Research in Millimeter Astronomy (CARMA) and with the Submillimeter Array (SMA). Our…

Astrophysics · Physics 2009-11-13 J. A. Eisner , R. L. Plambeck , John M. Carpenter , S. A. Corder , C. Qi , D. Wilner

We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of GSC 6214-210 A and B, a solar-mass member of the 5-10 Myr Upper Scorpius association with a 15 $\pm$ 2 Mjup companion orbiting at $\approx$330 AU (2.2").…

We present 7-mm continuum observations of 14 low-mass pre-main-sequence stars in the Taurus-Auriga star-forming region obtained with the Very Large Array with ~1.5" resolution and ~0.3 mJy rms sensitivity. For 10 objects, the circumstellar…

Astrophysics · Physics 2009-11-11 J. Rodmann , Th. Henning , C. J. Chandler , L. G. Mundy , D. J. Wilner

HD 138965 is a young A type star and member of the nearby young Argus association. This star is surrounded by a broad, bright debris disc with two temperature components that was spatially resolved at far-infrared wavelengths by Herschel.…

Constraining the distribution of gas and dust in the inner 20 au of protoplanetary disks is difficult. At the same time, this region is thought to be responsible for most planet formation, especially around the water ice line at 3-10 au.…

The protoplanetary system HD 169142 is one of the few cases where a potential candidate protoplanet has been recently detected via direct imaging. To study the interaction between the protoplanet and the disk itself observations of the gas…

Solar and Stellar Astrophysics · Physics 2017-04-05 D. Fedele , M. Carney , M. R. Hogerheijde , C. Walsh , A. Miotello , P. Klaassen , S. Bruderer , Th. Henning , E. F. vanDishoeck

The paper presents new high angular resolution ALMA 1.3 mm dust continuum observations of the protoplanetary system AS 209 in the Ophiuchus star forming region. The dust continuum emission is characterized by a main central core and two…

Earth and Planetary Astrophysics · Physics 2018-02-21 D. Fedele , M. Tazzari , R. Booth , L. Testi , C. Clarke , I. Pascucci , A. Kospal , D. Semenov , S. Bruderer , Th. Henning , R. Teague

The ALMA survey of Gas Evolution in PROtoplanetary disks (AGE-PRO) Large Program aims to trace the evolution of gas disk mass and size throughout the lifetime of protoplanetary disks. This paper presents Band-6 ALMA observations of 10…

We investigate the apparent discrepancy between gas and dust outer radii derived from millimeter observations of protoplanetary disks. Using 230 and 345 GHz continuum and CO J=3-2 data from the Submillimeter Array for four nearby disk…

Astrophysics · Physics 2009-11-13 A. M. Hughes , D. J. Wilner , C. Qi , M. R. Hogerheijde

Recent ALMA surveys of protoplanetary disks have shown that for most disks the extent of the gas emission is greater than the extent of the thermal emission of the millimeter-sized dust. Both line optical depth and the combined effect of…

Earth and Planetary Astrophysics · Physics 2020-07-01 L. Trapman , M. Ansdell , M. R. Hogerheijde , S. Facchini , C. F. Manara , A. Miotello , J. P. Williams , S. Bruderer

While it is widely accepted that planets are formed in protoplanetary disks, there is still much debate on when this process happens. In a few cases protoplanets have been directly imaged, but for the vast majority of systems, disk gaps and…

Earth and Planetary Astrophysics · Physics 2020-11-25 Felipe O. Alves , L. Ilsedore Cleeves , Josep M. Girart , Zhaohuan Zhu , Gabriel A. P. Franco , Alice Zurlo , Paola Caselli

ALMA observations of protoplanetary disks acquired by the Disk Substructure at High Angular Resolution Project (DSHARP) resolve the dust and gas emission on angular scales as small as 3 astronomical units, offering an unprecedented detailed…

Millimeter emission from debris disks around stars of different ages provides constraints on the collisional evolution of planetesimals. We present ALMA 1.3 millimeter observations of a sample of 76 Solar-type stars in the ~115 Myr old…

Earth and Planetary Astrophysics · Physics 2022-08-31 Devin Sullivan , David Wilner , Luca Matra , Mark C. Wyatt , Sean M. Andrews , Meredith A. MacGregor , Brenda Matthews

The presence of debris disks around $\sim$ 1-Gyr-old main sequence stars suggests that an appreciable amount of dust may persist even in mature planetary systems. Here we report the detection of dust emission from 55 Cancri, a star with…

Many dozens of circumstellar discs show signatures of sculpting by planets. To help find these protoplanets by direct imaging, we compute their broadband spectral energy distributions, which overlap with the JWST (James Webb Space…

Earth and Planetary Astrophysics · Physics 2024-12-16 Nick Choksi , Eugene Chiang

Radial substructure in the form of rings and gaps has been shown to be ubiquitous among protoplanetary discs. This could be the case in exoKuiper belts as well, and evidence for this is emerging. In this paper we present ALMA observations…

Earth and Planetary Astrophysics · Physics 2020-10-30 S. Marino , A. Zurlo , V. Faramaz , J. Milli , Th. Henning , G. M. Kennedy , L. Matrà , S. Pérez , P. Delorme , L. A. Cieza , A. M. Hughes