Zobrazeno 1 - 10
of 474
pro vyhledávání: '"NEUFELD, DAVID A."'
Autor:
Jacob, Arshia M., Nandakumar, Meera, Roy, Nirupam, Menten, Karl M., Neufeld, David A., Faure, Alexandre, Tiwari, Maitraiyee, Pillai, Thushara G. S., Robishaw, Timothy, Duran, Carlos A.
Ever since they were first detected in the interstellar medium, the radio wavelength (3.3 GHz) hyperfine-structure splitting transitions in the rotational ground state of CH have been observed to show anomalous excitation. Astonishingly, this behavio
Externí odkaz:
http://arxiv.org/abs/2411.08193
Autor:
Neufeld, David A.
A simple analytic model is presented to predict the near-IR H2 fluorescent line intensities emitted by diffuse interstellar clouds with a Plummer density profile. It is applicable to sightlines where (1) the column densities of H and H2 have been mea
Externí odkaz:
http://arxiv.org/abs/2410.09315
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:
Neufeld, David A., DeWitt, Curtis, Lesaffre, Pierre, Cabrit, Sylvie, Gusdorf, Antoine, Tram, Le Ngoc, Reach, William T.
Using the EXES instrument on SOFIA, we have obtained velocity-resolved spectra of several pure rotational lines of H2 toward shocked molecular gas within three Galactic sources: the supernova remnant (SNR) IC443 (Clump C), a protostellar outflow in t
Externí odkaz:
http://arxiv.org/abs/2410.04473
Autor:
Neufeld, David A., Welty, Daniel E., Ivlev, Alexei V., Caselli, Paola, Edenhofer, Gordian, Indriolo, Nick, Obolentseva, Marta, Silsbee, Kedron, Sonnentrucker, Paule, Wolfire, Mark G.
Newly-computed collisional rate coefficients for the excitation of C$_2$ in collisions with H$_2$, presented recently by Najar and Kalugina (2020), are significantly larger than the values adopted previously in models for the excitation of the C$_2$
Externí odkaz:
http://arxiv.org/abs/2408.11108
Autor:
Kálosi, Ábel, Grieser, Manfred, Isberner, Leonard W., Kreckel, Holger, Larson, Åsa, Neufeld, David A., Orel, Ann E., Paul, Daniel, Savin, Daniel W., Schippers, Stefan, Schmidt, Viviane C., Wolf, Andreas, Wolfire, Mark G., Novotný, Oldřich
We have experimentally studied dissociative recombination (DR) of electronically and vibrationally relaxed ArH$^+$ in its lowest rotational levels, using an electron--ion merged-beams setup at the Cryogenic Storage Ring. We report measurements for th
Externí odkaz:
http://arxiv.org/abs/2408.06808
Autor:
Neufeld, David A., Manoj, P., Tyagi, Himanshu, Narang, Mayank, Watson, Dan M., Megeath, S. Thomas, Van Dishoeck, Ewine F., Gutermuth, Robert A., Stanke, Thomas, Yang, Yao-Lun, Rubinstein, Adam E., Anglada, Guillem, Beuther, Henrik, Garatti, Alessio Caratti o, Evans II, Neal J., Federman, Samuel, Fischer, William J., Green, Joel, Klaassen, Pamela, Looney, Leslie W., Osorio, Mayra, Nazari, Pooneh, Tobin, John J., Tychoniec, Lukasz, Wolk, Scott
Using the MIRI/MRS spectrometer on JWST, we have detected pure rotational, suprathermal OH emissions from the vicinity of the intermediate-mass protostar HOPS 370 (OMC2/FIR3). These emissions are observed from shocked knots in a jet/outflow, and orig
Externí odkaz:
http://arxiv.org/abs/2404.07299
Autor:
González-Alfonso, Eduardo, García-Bernete, Ismael, Pereira-Santaella, Miguel, Neufeld, David A., Fischer, Jacqueline, Donnan, Fergus R.
Mid-infrared (mid-IR) gas-phase molecular bands are powerful diagnostics of the warm interstellar medium. We report the James Webb Space Telescope detection of the CO v=1-0 (4.4-5.0 um) and H2O nu2=1-0 (5.0-7.8um) ro-vibrational bands, both in absorp
Externí odkaz:
http://arxiv.org/abs/2312.04914
Publikováno v:
Power, Energy and Electrical Engineering, Volume 54, 2024, Pages 589-600
The goal of the load flow study is to ensure that electrical power is delivered efficiently and reliably to end-users while maintaining the stability and security of the power system. Newton-Raphson is a numerical method used widely for load flow ana
Externí odkaz:
http://arxiv.org/abs/2310.19953
Autor:
Kálosi, Ábel, Gamer, Lisa, Grieser, Manfred, von Hahn, Robert, Isberner, Leonard W., Jäger, Julia I., Kreckel, Holger, Neufeld, David A., Paul, Daniel, Savin, Daniel W., Schippers, Stefan, Schmidt, Viviane C., Wolf, Andreas, Wolfire, Mark G., Novotný, Oldřich
Observations of OH$^+$ are used to infer the interstellar cosmic ray ionization rate in diffuse atomic clouds, thereby constraining the propagation of cosmic rays through and the shielding by interstellar clouds, as well as the low energy cosmic ray
Externí odkaz:
http://arxiv.org/abs/2309.17015