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We have modelled Atacama Large Millimeter/sub-millimeter Array (ALMA) long baseline imaging of the strong gravitational lens system H-ATLAS J090311.6+003906 (SDP.81). We have reconstructed the distribution of band 6 and 7 continuum emission…

The dominant mechanism forming multiple stellar systems in the high-mass regime (M$_\ast \gtrsim $ 8 $M_{\odot}$) remained unknown because direct imaging of multiple protostellar systems at early phases of high-mass star formation is very…

We have surveyed the core regions of the z = 1.46 cluster XCS J2215.9-1738 with the Atacama Large Millimeter Array (ALMA) and the MUSE-GALACSI spectrograph on the VLT. We obtained high spatial resolution observations with ALMA of the 1.2 mm…

Astrophysics of Galaxies · Physics 2017-11-28 Stuart M. Stach , A. M. Swinbank , Ian Smail , Matt Hilton , J. M. Simpson , E. A. Cooke

The gas content of galaxies is a key factor for their growth, starting from star formation and black hole accretion to galaxy mergers. Thus, characterising its properties via observations of tracers like the CO emission line is of big…

Astrophysics of Galaxies · Physics 2020-02-26 Judit Fogasy , Kirsten K. Knudsen , Guillaume Drouart , Claudia del P. Lagos , Lulu Fan

Using numerical hydrodynamic simulations, we study the gravitational fragmentation of an unstable protostellar disc formed during the collapse of a pre-stellar core with a mass of 1.2 M_sun. The forming fragments span a mass range from…

Solar and Stellar Astrophysics · Physics 2015-06-16 Eduard Vorobyov , Olga Zakhozhay , Michael Dunham

Jets from young stellar objects provide insight into the workings of the beating heart at the centre of star forming cores. In some cases, multiple pulsed outflows are detected such as the atomic and molecular jets from a proposed binary…

Solar and Stellar Astrophysics · Physics 2020-01-08 Chris J. R. Lynch , Michael D. Smith , Simon C. O. Glover

We present observations of a giant Lyman-alpha blob in the SSA22 proto-cluster at z=3.1, SSA22-LAB1, taken with the Atacama Large Millimeter/submillimeter Array (ALMA). Dust continuum, along with [C II]158um, and CO(4-3) line emission have…

By using a new numerical code for deriving the spectral energy distributions of galaxies, we have investigated the time evolution of morphological properties, the star formation rate, and the submillimeter flux at 850 $\mu$m in…

Astrophysics · Physics 2015-06-24 Kenji Bekki , Yasuhiro Shioya

ALMA 870$\mu$m continuum imaging has uncovered a population of blends of multiple dusty star-forming galaxies (DSFGs) in sources originally detected with the Herschel Space Observatory. However, their pairwise separations are much smaller…

We investigated the formation of arc-like structures in the infalling envelope around protostars, motivated by the recent Atacama Large Millimeter/Submillimeter Array (ALMA) observations of the high-density molecular cloud core,…

Solar and Stellar Astrophysics · Physics 2015-06-23 Tomoaki Matsumoto , Toshikazu Onishi , Kazuki Tokuda , Shu-ichiro Inutsuka

Binary systems are a common site of planet formation, despite the destructive effects of the binary on the disk. While surveys of planet forming material have found diminished disk masses around medium separation ($\sim$10--100 au)…

Earth and Planetary Astrophysics · Physics 2025-10-14 Kevin Flaherty , Peter Knowlton , Tasan Smith-Gandy , A. Meredith Hughes , Marina Kounkel , Eric Jensen , James Muzerolle , Kevin Covey

We use high-resolution continuum images obtained at 870microns with the Atacama Large Millimeter Array (ALMA) to probe the surface density of star-formation in z~2 galaxies and study the different physical properties between galaxies within…

We review the recent observations of protoplanetary disks together with relevant theoretical studies with an emphasis on the evolution of volatiles. In the last several years Atacama Large Millimeter/submillimeter Array (ALMA) provided…

Earth and Planetary Astrophysics · Physics 2024-11-05 Yuri Aikawa , Satoshi Okuzumi , Klaus Pontoppidan

The nuclear structure of dusty star-forming galaxies is largely unexplored but harbours critical information about their structural evolution. Here, we present long-baseline Atacama Large (sub-)Millimetre Array (ALMA) continuum observations…

Astrophysics of Galaxies · Physics 2025-01-29 H. R. Stacey , M. Kaasinen , C. M. O'Riordan , J. P. McKean , D. M. Powell , F. Rizzo

This paper presents high-resolution ALMA observations of the massive young stellar object G25.65+1.05, which is known to host water maser super flares. To investigate the nature of compact continuum sources that have been previously…

Astrophysics of Galaxies · Physics 2025-12-16 N. N. Shakhvorostova , A. M. Sobolev , D. A. Ladeyshchikov , S. Y. Parfenov , A. A. Shagabutdinov , S. -Y. Liu

We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of 1.1 mm dust continuum and CO 2-1 emission toward six dense cores within the Ophiuchus molecular cloud. We detect compact, sub-arcsecond continuum structures…

Solar and Stellar Astrophysics · Physics 2018-12-26 Rachel K. Friesen , Andy Pon , Tyler L. Bourke , P. Caselli , J. Di Francesco , Jes K. Jørgensen , Jaime E. Pineda

The dynamical interactions between young binaries can perturb the material distribution of their circumstellar disks, and modify the planet formation process. In order to constrain the impact and nature of the binary interaction in the RW…

Earth and Planetary Astrophysics · Physics 2024-07-29 N. T. Kurtovic , S. Facchini , M. Benisty , P. Pinilla , S. Cabrit , E. L. N. Jensen , C. Dougados , R. Booth , C. N. Kimmig , C. F. Manara , J. E. Rodriguez

Determining the initial stellar multiplicity is a challenging problem since protostars are faint and deeply embedded at early times; once formed, multiple protostellar systems may significantly dynamically evolve before they are optically…

Solar and Stellar Astrophysics · Physics 2015-06-03 Stella S. R. Offner , John Capodilupo , Scott Schnee , Alyssa A. Goodman

Protostellar outflows are one of the most outstanding features of star formation. Observational studies over the last several decades have successfully demonstrated that outflows are ubiquitously associated with low- and high-mass…

The surroundings of massive protostars constitute an accretion disc which has numerically been shown to be subject to fragmentation and responsible for luminous accretion-driven outbursts. Moreover, it is suspected to produce close binary…

Solar and Stellar Astrophysics · Physics 2017-12-06 D. M. -A. Meyer , R. Kuiper , W. Kley , K. G. Johnston , E. Vorobyov