Zobrazeno 1 - 10
of 16 476
pro vyhledávání: '"P Sheehan"'
Autor:
Tyagi, Himanshu, P., Manoj, Narang, Mayank, Megeath, S T., Rocha, Will Robson M., Brunken, Nashanty, Rubinstein, Adam E., Gutermuth, Robert A., Evans, Neal J., van Dishoeck, Ewine, Federman, Sam, Watson, Dan M., Neufeld, David A., Anglada, Guillem, Beuther, Henrik, Garatti, Alessio Caratti o, Looney, Leslie W., Nazari, Pooneh, Osorio, Mayra, Stanke, Thomas, Yang, Yao-Lun, Bourke, Tyler L., Fischer, William J., Furlan, Elise, Green, Joel D., Habel, Nolan, Klaassen, Pamela, Karnath, Nicole, Linz, Hendrik, Muzzerolle, James, Tobin, John J., Atnagulov, Prabhani, Rahatgaonkar, Rohan, Sheehan, Patrick D., Slavicinska, Katerina, Stutz, Amelia M., Tychoniec, Łukasz, Wolk, Scott J.
The composition of protoplanetary disks, and hence the initial conditions of planet formation, may be strongly influenced by the infall and thermal processing of material during the protostellar phase. Composition of dust and ice in protostellar enve
Externí odkaz:
http://arxiv.org/abs/2410.06697
Autor:
Curtin, Miriam, Sheehan, Brian, Gruben, Melanie, Kozma, Nikoletta, O'Carroll, Gillian, Murray, Hazel
Small and medium enterprises (SMEs) are increasingly vulnerable to cyber threats due to limited resources and cybersecurity expertise, in addition to an increasingly hostile cyber threat environment at national and international levels. This study ai
Externí odkaz:
http://arxiv.org/abs/2408.16124
Over the last years, there has been a significant amount of work studying the power of specific classes of computationally efficient estimators for multiple statistical parametric estimation tasks, including the estimators classes of low-degree polyn
Externí odkaz:
http://arxiv.org/abs/2408.00746
Clock transitions (CTs) in spin systems, which occur at avoided level crossings, enhance quantum coherence lifetimes T$_2$ because the transition becomes immune to the decohering effects of magnetic field fluctuations to first order. We present the f
Externí odkaz:
http://arxiv.org/abs/2407.21214
Autor:
Sadavoy, Sarah I, Sheehan, Patrick, Tobin, John J., Murillo, Nadia M., Teague, Richard, Stephens, Ian W., Henning, Thomas, Myers, Philip C., Bergin, Edwin A.
Publikováno v:
A&A 687, A308 (2024)
We present ALMA Band 7 molecular line observations of the protostars within the VLA 1623 system. We map C$^{17}$O (3 - 2) in the circumbinary disk around VLA 1623A and the outflow cavity walls of the collimated outflow. We further detect red-shifted
Externí odkaz:
http://arxiv.org/abs/2406.12984
Autor:
Tobin, John J., Sheehan, Patrick D.
The envelopes and disks that surround protostars reflect the initial conditions of star and planet formation and govern the assembly of stellar masses. Characterizing these structures requires observations that span the near-infrared to centimeter wa
Externí odkaz:
http://arxiv.org/abs/2403.15550
We develop a sparse hierarchical $hp$-finite element method ($hp$-FEM) for the Helmholtz equation with rotationally invariant variable coefficients posed on a two-dimensional disk or annulus. The mesh is an inner disk cell (omitted if on an annulus d
Externí odkaz:
http://arxiv.org/abs/2402.12831
We show, in one dimension, that an $hp$-Finite Element Method ($hp$-FEM) discretisation can be solved in optimal complexity because the discretisation has a special sparsity structure that ensures that the \emph{reverse Cholesky factorisation} -- Cho
Externí odkaz:
http://arxiv.org/abs/2402.11299
Autor:
Brunken, Nashanty G. C., Rocha, Will R. M., van Dishoeck, Ewine F., Gutermuth, Robert, Tyagi, Himanshu, Slavicinska, Katerina, Nazari, Pooneh, Megeath, S. Thomas, Evans II, Neal J., Narang, Mayank, Manoj, P., Rubinstein, Adam E., Watson, Dan M., Looney, Leslie W., Linnartz, Harold, Garatti, Alessio Caratti o, Beuther, Henrik, Linz, Hendrik, Klaassen, Pamela, Poteet, Charles A., Federman, Samuel, Anglada, Guillem, Atnagulov, Prabhani, Bourke, Tyler L., Fischer, William J., Furlan, Elise, Green, Joel, Habel, Nolan, Hartmann, Lee, Karnath, Nicole, Osorio, Mayra, Page, James Muzerolle, Pokhrel, Riwaj, Rahatgaonkar, Rohan, Sheehan, Patrick, Stanke, Thomas, Stutz, Amelia M., Tobin, John J., Tychoniec, Lukasz, Wolk, Scott, Yang, Yao-Lun
Publikováno v:
A&A 685, A27 (2024)
The structure and composition of simple ices can be modified during stellar evolution by protostellar heating. Key to understanding the involved processes are thermal and chemical tracers that can diagnose the history and environment of the ice. The
Externí odkaz:
http://arxiv.org/abs/2402.04314
Autor:
Reynolds, Nickalas K., Tobin, John J., Sheehan, Patrick D., Sadavoy, Sarah I., Looney, Leslie W., Kratter, Kaitlin M., Li, Zhi-Yun, Segura-Cox, Dominique M., Kaib, Nathan A.
We present a statistical characterization of circumstellar disk orientations toward 12 protostellar multiple systems in the Perseus molecular cloud using the Atacama Large Millimeter/submillimeter Array at Band 6 (1.3 mm) with a resolution of 25 mas
Externí odkaz:
http://arxiv.org/abs/2312.13570