Results 31 to 40 of about 400,542 (301)

An ALMA Survey of H2CO in Protoplanetary Disks [PDF]

Astrophysical Journal, 2020
H2CO is one of the most abundant organic molecules in protoplanetary disks and can serve as a precursor to more complex organic chemistry. We present an Atacama Large Millimeter/submillimeter Array survey of H2CO toward 15 disks covering a range of ...
J. Pegues, K. Öberg, J. Bergner, R. Loomis, C. Qi, R. L. Gal, L. Cleeves, V. Guzmán, Jane Huang, J. Jørgensen, S. Andrews, G. Blake, J. Carpenter, K. Schwarz, Jonathan P. Williams, D. Wilner   +15 more
semanticscholar   +1 more source

Global Hydromagnetic Simulations of Protoplanetary Disks with Stellar Irradiation and Simplified Thermochemistry [PDF]

Astrophysical Journal, 2020
Outflows driven by large-scale magnetic fields likely play an important role in the evolution and dispersal of protoplanetary disks and in setting the conditions for planet formation.
O. Gressel, J. Ramsey, C. Brinch, R. Nelson, N. Turner, S. Bruderer   +5 more
semanticscholar   +1 more source

A Survey of CH₃CN and HC₃N in Protoplanetary Disks [PDF]

, 2018
The organic content of protoplanetary disks sets the initial compositions of planets and comets, thereby influencing subsequent chemistry that is possible in nascent planetary systems.
Jennifer B. Bergner, Viviana V. Guzmán, Karin I. Öberg, Ryan A. Loomis, Jamila Pegues   +4 more
openalex   +3 more sources

An Unbiased ALMA Spectral Survey of the LkCa 15 and MWC 480 Protoplanetary Disks [PDF]

Astrophysical Journal, 2020
The volatile contents of protoplanetary disks both set the potential for planetary chemistry and provide valuable probes of defining disk system characteristics such as stellar mass, gas mass, ionization, and temperature structure. Current disk molecular
R. Loomis, K. Öberg, S. Andrews, E. Bergin, J. Bergner, G. Blake, L. Cleeves, I. Czekala, Jane Huang, R. Le Gal, F. Ménard, J. Pegues, C. Qi, C. Walsh, Jonathan P. Williams, D. Wilner   +15 more
semanticscholar   +1 more source

Contacts of Water Ice in Protoplanetary Disks—Laboratory Experiments [PDF]

Astrophysical Journal, 2019
Water ice is abundant in protoplanetary disks. Its sticking properties are therefore important during phases of collisional growth. In this work, we study the sticking and rolling of 1.1 mm ice grains at different temperatures.
G. Musiolik, G. Wurm
semanticscholar   +1 more source

Protoplanetary Disk Chemistry

Annual Review of Astronomy and Astrophysics, 2023
Planets form in disks of gas and dust around young stars. The disk molecular reservoirs and their chemical evolution affect all aspects of planet formation, from the coagulation of dust grains into pebbles to the elemental and molecular compositions of the mature planet.
Öberg, Karin I., Facchini, Stefano, Anderson, Dana E.   +2 more
openaire   +2 more sources

HNC IN PROTOPLANETARY DISKS [PDF]

The Astrophysical Journal, 2015
The distributions and abundances of small organics in protoplanetary disks are potentially powerful probes of disk physics and chemistry. HNC is a common probe of dense interstellar regions and the target of this study. We use the Submillimeter Array (SMA) to observe HNC 3--2 towards the protoplanetary disks around the T Tauri star TW Hya and the ...
Dawn Graninger, Karin I. Öberg, Chunhua Qi, Joel Kastner   +3 more
openaire   +3 more sources

Systematic Variations of CO Gas Abundance with Radius in Gas-rich Protoplanetary Disks [PDF]

Astrophysical Journal, 2019
CO is the most widely used gas tracer of protoplanetary disks. Its abundance is usually assumed to be an interstellar ratio throughout the warm molecular layer of the disk.
Ke Zhang, E. Bergin, K. Schwarz, S. Krijt, F. Ciesla   +4 more
semanticscholar   +1 more source

Observational constraints on dust disk sizes in tidally truncated protoplanetary disks in multiple systems in the Taurus region [PDF]

Astronomy & Astrophysics, 2019
The impact of stellar multiplicity on the evolution of planet-forming disks is still the subject of debate. Here we present and analyze disk structures around ten multiple stellar systems that were included in an unbiased, high spatial resolution survey ...
C. Manara, M. Tazzari, F. Long, G. Herczeg, G. Lodato, A. A. Rota, P. Cazzoletti, G. V. D. Plas, P. Pinilla, G. Dipierro, Suzan Edwards, D. Harsono, D. Johnstone, Yiqing Liu, F. Ménard, B. Nisini, E. Ragusa, Y. Boehler, S. Cabrit   +18 more
semanticscholar   +1 more source

Gas line observations of disks*

EPJ Web of Conferences, 2015
Gas represents the bulk of the mass content in protoplanetary disks. It is therefore observations of gas that can provide important information of physical structure and chemical evolution of disks.
Dionatos Odysseas
doaj   +1 more source