101 citations · 242 across the 11 of their papers we have counts for
8 papers · 1 filter
Multiphase turbulence as the origin of OH+, H2O+ and H3+ column density scatter in the local ISM
Uri Malamud, Shmuel Bialy, Benjamin Godard +2
Observations of the reactive ions OH+, H2O+ and H3+ in the Galactic interstellar medium reveal large sight-line-to-sight-line scatter in their column densities, commonly interprete…
Excitation of warm HD and H and implications for the interstellar deuterium abundance
David A. Neufeld
Rotational emission from HD provides a direct probe of deuterium in warm molecular gas, but the conversion of HD line fluxes to total column densities is sensitive to non-LTE excit…
JWST observations of cosmic-ray-excited H in Barnard 68: spatial variations and constraints on cosmic-ray attenuation
David A. Neufeld, Kedron Silsbee, Alexei V. Ivlev +9
We present James Webb Space Telescope (JWST) NIRSpec observations of the starless dark cloud Barnard 68 that reveal the spatially-resolved signature of cosmic-ray excited molecular…
The first detection of cosmic-ray excited H in interstellar space
Shmuel Bialy, Amit Chemke, David A. Neufeld +12
Stars and planets form within cold, dark molecular clouds. In these dense regions, where starlight cannot penetrate, cosmic rays (CRs) are the dominant source of ionization -- driv…
Revisiting rotationally excited CH at radio wavelengths: A case study towards W51
Arshia M. Jacob, Meera Nandakumar, Nirupam Roy +7
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 b…
Herschel/PACS Spectroscopic Survey of Protostars in Orion: The Origin of Far-Infrared CO Emission
P. Manoj, D. M. Watson, D. A. Neufeld +14
We present far-IR (57-196 mu) spectra of 21 protostars in the Orion molecular clouds, obtained with the Photodetector Array Camera and Spectrometer (PACS) onboard the Herschel Spac…
Herschel observations of extra-ordinary sources: Detecting spiral arm clouds by CH absorption lines
S. -L. Qin, P. Schilke, C. Comito +67
We have observed CH absorption lines () against the continuum source Sgr~B2(M) using the \textit{Herschel}/HIFI instrument. With the high spectral…
Herschel/HIFI discovery of interstellar chloronium (HCl)
D. C. Lis, J. C. Pearson, D. A. Neufeld +102
We report the first detection of chloronium, HCl, in the interstellar medium, using the HIFI instrument aboard the \emph{Herschel} Space Observatory. The li…