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Observational constraints on dust properties in protoplanetary disks are key to better understanding disks' evolution. We continue our exploration of the protoplanetary disk around AB Aur by characterizing its dust properties. We present…

The last decade has witnessed remarkable advances in the characterization of the (sub-)millimeter emission from planet-forming disks. Instead, the study of the (sub-)centimeter emission has made more limited progress, to the point that only…

We present near-infrared spectra of the excess continuum emission from the innermost regions of classical T Tauri disks. In almost all cases, the shape of the excess is consistent with that of a single-temperature blackbody with T ~ 1400 K,…

Astrophysics · Physics 2009-11-10 James Muzerolle , Nuria Calvet , Lee Hartmann , Paola D'Alessio

Dust traps are the most promising mechanisms to explain the observed substructures in protoplanetary discs. In this work, we present high-angular resolution ($\sim$60 mas, 9.4 au) and high-sensitivity Atacama Large Millimetre/submillimetre…

The PDS 70 system, hosting two planets within its disk, is an ideal target for examining the effect of planets on dust accumulation, growth, and ongoing planet formation. Here, we present high-resolution ($0.''07 = 8 \ \mathrm{au}$) dust…

Earth and Planetary Astrophysics · Physics 2024-09-26 Kiyoaki Doi , Akimasa Kataoka , Hauyu Baobab Liu , Tomohiro C. Yoshida , Myriam Benisty , Ruobing Dong , Yoshihide Yamato , Jun Hashimoto

We use ALMA observations of four sub-millimetre galaxies (SMGs) at $z\sim2-3$ to investigate the spatially resolved properties of the inter-stellar medium (ISM) at scales of 1--5 kpc (0.1--0.6$''$). The velocity fields of our sources,…

We present long baseline Atacama Large Millimeter/submillimeter Array (ALMA) observations of the 870$\,\mu$m dust continuum emission and CO (3-2) from the protoplanetary disk around the Herbig Ae/Be star HD 100546, which is one of the few…

Solar and Stellar Astrophysics · Physics 2019-01-30 J. E. Pineda , J. Szulágyi , S. P. Quanz , E. F. van Dishoeck , A. Garufi , F. Meru , G. D. Mulders , L. Testi , M. R. Meyer , M. Reggiani

The vertical settling of dust grains in a circumstellar disk, characterized by their scale height, is a pivotal process in the formation of planets. This study offers in-depth analysis and modeling of the radial scale height profile of dust…

Earth and Planetary Astrophysics · Physics 2025-08-05 Haifeng Yang , Ian W. Stephens , Zhe-Yu Daniel Lin , Manuel Fernández-López , Zhi-Yun Li , Leslie W. Looney , Rachel Harrison

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

We report our analyses of the multi-epoch (2015-2017) ALMA archival data of the Class II binary system XZ Tau at Bands 3, 4 and 6. The millimeter dust continuum images show compact, unresolved (r <~ 15 au) circumstellar disks (CSDs) around…

Solar and Stellar Astrophysics · Physics 2021-10-04 Takanori Ichikawa , Miyu Kido , Daisuke Takaishi , Yoshito Shimajiri , Yusuke Tsukamoto , Shigehisa Takakuwa

We present sensitive and high angular resolution ($\sim$0.2-0.3$''$) (sub)millimeter (230 and 345 GHz) continuum and CO(2$-$1)/CO(3$-$2) line archive observations of the disk star system in UX Tauri carried out with ALMA (The Atacama Large…

Mid-infrared spectrophotometric observations have revealed a small sub-class of circumstellar disks with spectral energy distributions (SEDs) suggestive of large inner gaps with low dust content. However, such data provide only an indirect…

Solar and Stellar Astrophysics · Physics 2011-02-11 J. M. Brown , G. A. Blake , C. Qi , C. P. Dullemond , D. J. Wilner , J. P. Williams

We present the results of ALMA observations of dust continuum emission and molecular rotational lines toward a dense core MC27 (aka L1521F) in Taurus, which is considered to be at a very early stage of star formation. The detailed column…

Circumstellar disks are thought to experience a rapid "transition" phase in their evolution that can have a considerable impact on the formation and early development of planetary systems. We present new and archival high angular resolution…

Astrophysics of Galaxies · Physics 2015-05-27 Sean Andrews , David Wilner , Catherine Espaillat , A. M. Hughes , C. P. Dullemond , M. K. McClure , Chunhua Qi , J. M. Brown

We present 870 micron observations of dust continuum emission from the LkCa 15 protoplanetary disk at high angular resolution (with a characteristic scale of 0.25" = 35 AU), obtained with the IRAM Plateau de Bure interferometer and…

Earth and Planetary Astrophysics · Physics 2015-05-30 Sean M. Andrews , Katherine A. Rosenfeld , David J. Wilner , Michael Bremer

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 spatially resolved AU Mic debris disc is among the most famous and best-studied debris discs. We aim at a comprehensive understanding of the dust production and the dynamics of the disc objects with in depth collisional modelling…

Earth and Planetary Astrophysics · Physics 2015-09-16 Ch. Schüppler , T. Löhne , A. V. Krivov , S. Ertel , J. P. Marshall , S. Wolf , M. C. Wyatt , J. -C. Augereau , S. A. Metchev

We present Atacama Large Millimeter/submillimeter Array (ALMA) observations at 0.3 arcsec-resolution of EX Lup, the prototype of the EXor class of outbursting pre-main sequence stars. The circumstellar disk of EX Lup is resolved for the…

Solar and Stellar Astrophysics · Physics 2018-06-13 A. S. Hales , S. Peréz , M. Saito , C. Pinte , L. Knee , I. de Gregorio-Monsalvo , C. López , A. Plunkett , P. Córtes , S. Corder , L. Cieza

Crescent-shaped asymmetries are common in millimetre observations of protoplanetary discs and are usually attributed to vortices or dust overdensities. However, they often appear on a single side of the major axis and roughly symmetric…

Earth and Planetary Astrophysics · Physics 2024-06-24 Álvaro Ribas , Cathie J. Clarke , Francesco Zagaria

Transitional disks around young stars are promising candidates to look for recently formed, embedded planets. Planet-disk interaction models predict that planets clear a gap in the gas while trapping dust at larger radii. Other physical…