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Four Ophiuchus binaries, two Class I systems and two Class II systems, with separations of ~450-1100 AU, were observed with the Owens Valley Radio Observatory (OVRO) millimeter interferometer. In each system, the 3 mm continuum maps show…

Astrophysics · Physics 2010-11-11 J. Patience , R. L. Akeson , E. L. N. Jensen

Theoretical models of grain growth predict dust properties to change as a function of protoplanetary disk radius, mass, age and other physical conditions. We lay down the methodology for a multi-wavelength analysis of (sub-)mm and cm…

ALMA has spatially resolved over 200 annular structures in protoplanetary discs, many of which are suggestive of the presence of planets. Constraining the mass of these putative planets is quite degenerate for it depends on the disc…

Earth and Planetary Astrophysics · Physics 2023-06-14 Yinhao Wu , Clément Baruteau , Sergei Nayakshin

We present photometric ISO 60 and 170um measurements, complemented by some IRAS data at 60um, of a sample of 84 nearby main-sequence stars of spectral class A, F, G and K in order to determine the incidence of dust disks around such…

We carried out 12CO(J=2-1) observations toward three star-forming galaxies on the main sequence at z~1.4 with the Nobeyama 45m radio telescope. These galaxies are detected with Spitzer/MIPS in 24 um, Herschel/SPIRE in 250 um and 350 um, and…

Astrophysics of Galaxies · Physics 2015-06-22 Akifumi Seko , Kouji Ohta , Bunyo Hatsukade , Kiyoto Yabe , Tomoe Takeuchi , Daisuke Iono

This study aims to determine the impact of stellar binary companions on the lifetime and evolution of circumstellar disks in the Chamaeleon I (Cha I) star-forming region by measuring the frequency and strength of accretion and circumstellar…

A decade of surveys has hinted at a possible higher occurrence rate of debris discs in systems hosting low mass planets. This could be due to common favourable forming conditions for rocky planets close in and planetesimals at large radii.…

Earth and Planetary Astrophysics · Physics 2017-06-21 S. Marino , M. C. Wyatt , G. M. Kennedy , W. Holland , L. Matrà , A. Shannon , R. J. Ivison

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

The mass of solids in a young circumstellar disc may be the key factor in its efficiency in building planetesimals and planetary cores, and dust observed around young T Tauri and Herbig Ae stars can be used as a proxy for this initial solid…

Solar and Stellar Astrophysics · Physics 2015-05-19 J. S. Greaves

The radial velocities and direct imaging observations of exoplanets have suggested that the frequency of giant planets may decrease for intermediate-mass stars ($2.5-8\,M_\odot$). The key mechanism that could hinder their formation remains…

Earth and Planetary Astrophysics · Physics 2022-06-22 Paola Pinilla , Antonio Garufi , Matías Gárate

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 a 1.3 mm continuum survey of protoplanetary disks in the 2-3 Myr old cluster, IC348, with the Submillimeter Array. We observed 85 young stellar objects and detected 10 with 1.3 mm fluxes greater than 2 mJy. The brightest source…

Solar and Stellar Astrophysics · Physics 2015-05-28 Nicholas Lee , Jonathan P. Williams , Lucas A. Cieza

Rings are the most frequently revealed substructure in ALMA dust observations of protoplanetary disks, but their origin is still hotly debated. In this paper, we identify dust substructures in 12 disks and measure their properties to…

ALMA observations of line emission from planet forming discs have demonstrated to be an excellent tool to probe the internal disc kinematics, often revealing subtle effects related to important dynamical processes occurring in them, such as…

Earth and Planetary Astrophysics · Physics 2022-11-30 G. Lodato , L. Rampinelli , E. Viscardi , C. Longarini , A. Inzquierdo , T. Paneque-Carreno , L. Testi , S. Facchini , A. Miotello , B. Veronesi , C. Hall

In recent ALMA surveys, the gas distributions and velocity structures of most of the protoplanetary disks can still not be imaged at high S/N due to the short integration time. In this work, we re-analyzed the ALMA 13CO (3-2) and C18O (3-2)…

Astrophysics of Galaxies · Physics 2018-08-29 Hsi-Wei Yen , Patrick M. Koch , Carlo F. Manara , Anna Miotello , Leonardo Testi

(Abridged) Dust particles evolve in size and lattice structure in protoplanetary disks, due to coagulation, fragmentation and crystallization, and are radially and vertically mixed in disks. This paper aims at determining the mineralogical…

Solar and Stellar Astrophysics · Physics 2015-05-19 J. Olofsson , J. -C. Augereau , E. F. van Dishoeck , B. Merín , N. Grosso , F. Ménard , G. A. Blake , J. -L. Monin

Dust emission at 8 micron has been extensively calibrated as an indicator of current star formation rate for galaxies and ~kpc-size regions within galaxies. Yet, the exact link between the 8 micron emission and the young stellar populations…

Astrophysics of Galaxies · Physics 2022-07-20 Kate Mallory , Daniela Calzetti , Zesen Lin

We present high spatial resolution (< 0.3" = 40$ AU) Submillimeter Array observations of the 865 micron continuum emission from the circumstellar disk around the young star DoAr 25. Despite its bright millimeter emission, this source…

Astrophysics · Physics 2009-11-13 Sean M. Andrews , A. M. Hughes , D. J. Wilner , Chunhua Qi

The presence of dusty debris around main sequence stars denotes the existence of planetary systems. Such debris disks are often identified by the presence of excess continuum emission at infrared and (sub-)millimetre wavelengths, with…

Earth and Planetary Astrophysics · Physics 2019-01-23 Jonathan P. Marshall , S. T. Maddison , E. Thilliez , B. C. Matthews , D. J. Wilner , J. S. Greaves , W. S. Holland

We develop a new method to constrain the star formation histories, dust attenuation and stellar masses of galaxies. It is based on two stellar absorption line indices, the 4000 Angstrom break strength and the Balmer absorption line index…