Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Kedron Silsbee"'
Autor:
David A. Neufeld, Daniel E. Welty, Alexei V. Ivlev, Paola Caselli, Gordian Edenhofer, Nick Indriolo, Marta Obolentseva, Kedron Silsbee, Paule Sonnentrucker, Mark G. Wolfire
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 143 (2024)
Newly computed collisional rate coefficients for the excitation of C _2 in collisions with H _2 , presented recently by Najar & Kalugina, are significantly larger than the values adopted previously in models for the excitation of the C _2 molecule, a
Externí odkaz:
https://doaj.org/article/6a9d230a80884b188bb97d7c26dc1e70
Autor:
Kedron Silsbee
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 2, p 87 (2024)
Radial drift of solid particles in the protoplanetary disk is often invoked as a threat to planet formation, as it removes solid material from the disk before it can be assembled into planets. However, it may also concentrate solids at particular loc
Externí odkaz:
https://doaj.org/article/4dbb9ca84f954274a4bace5ffa37487a
Publikováno v:
The Astrophysical Journal, Vol 953, Iss 1, p 72 (2023)
Dust coagulation in protoplanetary disks is not straightforward and is subject to several slowdown mechanisms, such as bouncing, fragmentation, and radial drift to the star. Furthermore, dust grains in UV-shielded disk regions are negatively charged
Externí odkaz:
https://doaj.org/article/7edf022acaed431d9bfac08689285967
A big question in the field of star and planet formation is the time at which substantial dust grain growth occurs. The observed properties of dust emission across different wavelength ranges have been used as an indication that millimeter-sized grai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40b45b950fca01cdf180361fc94f83a8
http://arxiv.org/abs/2210.01832
http://arxiv.org/abs/2210.01832
Autor:
María José Maureira, Munan Gong, Jaime E. Pineda, Hauyu Baobab Liu, Kedron Silsbee, Paola Caselli, Joaquin Zamponi, Dominique M. Segura-Cox, Anika Schmiedeke
Characterizing the physical conditions at disk scales in Class 0 sources is crucial for constraining the protostellar accretion process and the initial conditions for planet formation. We use ALMA 1.3 mm and 3 mm observations to investigate the physi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d34b876b9f50ea2f542c726b021b4ec6
Autor:
Juris Kalvāns, Kedron Silsbee
Observations of gaseous complex organic molecules (COMs) in cold starless and prestellar cloud cores require efficient desorption of the COMs and their parent species from icy mantles on interstellar grains. With a simple astrochemical model, we inve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff35aff98b5689886085dddf019d2637
We compute the desorption rate of icy mantles on dust grains as a function of the size and composition of both the grain and the mantle. We combine existing models of cosmic ray (CR) related desorption phenomena with a model of CR transport to accura
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::980d64fa076a0ddff8144e2ecae5848a
http://arxiv.org/abs/2109.04278
http://arxiv.org/abs/2109.04278
Autor:
Margot Fitz Axen, Stella S. S. Offner, Chris L. Fryer, Aimee Hungerford, Brandt A. L. Gaches, Kedron Silsbee
Recent studies have suggested that low-energy cosmic rays (CRs) may be accelerated inside molecular clouds by the shocks associated with star formation. We use a Monte Carlo transport code to model the propagation of CRs accelerated by protostellar a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da090c22aa3c4f63da211764cdcb7a7a
http://arxiv.org/abs/2105.00028
http://arxiv.org/abs/2105.00028
The energy spectrum of electrons produced in molecular gas by interstellar cosmic rays (CRs) is rigorously calculated as a function of gas column density $N$ traversed by the CRs. This allows us to accurately compute the local value of the secondary
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c23a05b86ce9627b0b7499746068ccb4
Non-thermal desorption of ices on interstellar grains is required to explain observations of molecules that are not synthesized efficiently in the gas phase in cold dense clouds. Perhaps the most important non-thermal desorption mechanism is one indu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0b3af4cbf63aa340d9311fda185822b