Zobrazeno 1 - 10
of 330
pro vyhledávání: '"Clarke, Cathie J"'
Autor:
Sellek, Andrew D., Grassi, Tommaso, Picogna, Giovanni, Rab, Christian, Clarke, Cathie J., Ercolano, Barbara
Context: Photoevaporation is an important process for protoplanetary disc dispersal but there has so far been a lack of consensus from simulations over the mass-loss rates and the most important part of the high-energy spectrum for driving the wind.
Externí odkaz:
http://arxiv.org/abs/2408.00848
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 about the mino
Externí odkaz:
http://arxiv.org/abs/2406.14626
Autor:
Scardoni, Chiara E., Booth, Richard A., Clarke, Cathie J., Rosotti, Giovanni P., Ribas, Alvaro
While high resolution ALMA observations reveal a wealth of substructure in protoplanetary discs, they remain incapable of resolving the types of small scale dust structures predicted, for example, by numerical simulations of the streaming instability
Externí odkaz:
http://arxiv.org/abs/2406.11627
Autor:
Longarini, Cristiano, Lodato, Giuseppe, Clarke, Cathie J., Speedie, Jessica, Paneque-Carreno, Teresa, Arrigoni, Edoardo, Curone, Pietro, Toci, Claudia, Hall, Cassandra
Gravitational instability is thought to be one of the main drivers of angular momentum transport in young protoplanetary discs. The disc around Elias 2-27 offers a unique example of gravitational instability at work. It is young and massive, displayi
Externí odkaz:
http://arxiv.org/abs/2406.05952
ALMA (Atacama Large Millimetre/submillimetre Array) observations of the thermal emission from protoplanetary disc dust have revealed a wealth of substructures that could evidence embedded planets, but planet-driven spirals, one of the more compelling
Externí odkaz:
http://arxiv.org/abs/2404.18925
Autor:
Sellek, Andrew D., Bajaj, Naman S., Pascucci, Ilaria, Clarke, Cathie J., Alexander, Richard, Xie, Chengyan, Ballabio, Giulia, Deng, Dingshan, Gorti, Uma, Gaspar, Andras, Morrison, Jane
[Ne II] 12.81 $\mu\mathrm{m}$ emission is a well-used tracer of protoplanetary disk winds due to its blueshifted line profile. MIRI-MRS recently observed T Cha, detecting this line along with lines of [Ne III], [Ar II] and [Ar III], with the [Ne II]
Externí odkaz:
http://arxiv.org/abs/2403.09780
Autor:
Zagaria, Francesco, Clarke, Cathie J., Booth, Richard A., Facchini, Stefano, Rosotti, Giovanni P.
We introduce a new technique to determine the gas turbulence and surface density in bright disc rings, under the assumption that dust growth is limited by turbulent fragmentation at the ring centre. We benchmark this prescription in HD 163296, showin
Externí odkaz:
http://arxiv.org/abs/2311.08950
Autor:
Curone, Pietro, Testi, Leonardo, Macias, Enrique, Tazzari, Marco, Facchini, Stefano, Williams, Jonathan P., Clarke, Cathie J., Natta, Antonella, Rosotti, Giovanni, Toci, Claudia, Lodato, Giuseppe
Publikováno v:
A&A 677, A118 (2023)
Protoplanetary disks emit radiation across a broad range of wavelengths, requiring a multiwavelength approach to fully understand their physical mechanisms and how they form planets. Observations at sub-millimeter to centimeter wavelengths can provid
Externí odkaz:
http://arxiv.org/abs/2307.10798
Autor:
Zagaria, Francesco, Facchini, Stefano, Miotello, Anna, Manara, Carlo F., Toci, Claudia, Clarke, Cathie J.
Publikováno v:
A&A 672, L15 (2023)
The Atacama Large Millimeter/submillimeter Array (ALMA) revolutionised our understanding of protoplanetary discs. However, the available data have not given conclusive answers yet on the underlying disc evolution mechanisms (viscosity or MHD winds).
Externí odkaz:
http://arxiv.org/abs/2304.01760