Results 41 to 50 of about 1,698,518 (186)

High-resolution Observations of “Dark” Neutral Hydrogen Clouds in the Virgo Cluster with the Very Large Array

The Astrophysical Journal
We have observed six “dark” neutral hydrogen (H i ) clouds discovered in the Virgo Cluster by the Arecibo Galaxy Environment Survey (AGES) with the Karl G.
Robert Minchin, Rhys Taylor, Emmanuel Momjian, Boris Deshev, Vojtěch Partík   +4 more
doaj   +1 more source

Improving Photometric Redshifts of Epoch of Reionization Galaxies: A New Empirical Transmission Curve with Neutral Hydrogen Damping Wing Lyα Absorption

The Astrophysical Journal Letters
We present a new analytical model for the attenuation to Epoch of Reionization (EoR) galaxies by proximate neutral hydrogen gas. Many galaxy spectra in the EoR taken by JWST have shown a flux deficit at wavelengths just redward of the Lyman break, and ...
Yoshihisa Asada, Guillaume Desprez, Chris J. Willott, Marcin Sawicki, Maruša Bradač, Gabriel Brammer, Florian Dubath, Kartheik G. Iyer, Nicholas S. Martis, Adam Muzzin, Gaël Noirot, Stéphane Paltani, Ghassan T. E. Sarrouh, Anishya Harshan, Vladan Markov   +14 more
doaj   +1 more source

Neutral Hydrogen (H i) 21 cm as a Probe: Investigating Spatial Variations in Interstellar Turbulent Properties

The Astrophysical Journal, 2023
Interstellar turbulence shapes the H i distribution in the Milky Way (MW). How this affects large-scale statistical properties of H i column density across the MW remains largely unconstrained.
Amit Kumar Mittal, Brian L. Babler, Snežana Stanimirović, Nickolas Pingel   +3 more
doaj   +1 more source

Ultrathin Tropical Tropopause Clouds (UTTCs) : I. Cloud morphology and occurrence [PDF]

, 2003
Subvisible cirrus clouds (SVCs) may contribute to dehydration close to the tropical tropopause. The higher and colder SVCs and the larger their ice crystals, the more likely they represent the last efficient point of contact of the gas phase with the ice
V. A. Yushkov, Santacesaria, Vincenzo, Flentje, H., Adriani, A., Luo, Beiping, C. Kiemle, Di Donfrancesco, Guido, Khattatov, Vyacheslav, Toci, Guido, R. A. MacKenzie, Volk, C.M., MacKenzie, R., Schiller, C., Th. Peter, Carslaw, Kenneth S., Santacesaria, V., H. Flentje, Yushkov, Vladimir, Borrmann, Stephan, MacKenzie, Robert A., MacKenzie, A.R., Luo, B. P., Kiemle, Christoph, Mazzinghi, Piero, Cairo, F., Yushkov, Vladimir A., Carslaw, K., Flentje, Harald, Rudakov, Vladimir V., T. Trautmann, Noone, K., Noone, Kevin, Luo, B., P. Mazzinghi, K. Noone, Ström, J., Kiemle, C., Thomas, Andreas, G. Toci, Mazzinghi, P., Di Don-Francesco, Guido, Beuermann, J., C. Schiller, Mitev, V., Wirth, M., Khattatov, V., Trautmann, T., S. Borrmann, Volk, C.-Michael, J. Beuermann, Wernli, H., Di Donfrancesco, G., Carslaw, K.S., Schiller, Cornelius, C. M. Volk, Peter, Thomas, V. Rudakov, F. Cairo, Thomas, A., Stefanutti, Leopoldo, Trautmann, Thomas, Cairo, Francesco, MacKenzie, Robert, Strom, Johan, Carslaw, K. S., Di Don-Francesco, G., B. P. Luo, Beuermann, Jürgen, A. Adriani, Borrmann, S., Rudakov, V., J. Strom, Volk, C., V. Mitev, V. Santacesaria, V. Khattatov, Peter, Th., Yushkov, V., K. S. Carslaw, Volk, C. M., A. Thomas, L. Stefanutti, Adriani, Alberto, M. Wirth, Peter, T., Yushkov, V. A., Stefanutti, L., G. Di Donfrancesco, Toci, G., Wirth, Martin, Mitev, Valentin, Strom J, Santacesaria V, Noone K, Adriani A, Trautmann T, Volk C M, Mitev V, Khattatov V, Stefanutti L, Thomas A, Rudakov V, MacKenzie R A, Schiller C, Wirth M, Toci G, Cairo F, Luo B P, Peter Th, Carslaw K S, Flentje H, Beuermann J, Yushkov V A, Borrmann S, Mazzinghi P, Kiemle C, Di Donfrancesco G, Mackenzie, R. A.   +117 more
core   +2 more sources

CO-dark Molecular Gas Traced by HCO+ in the Diffuse Interstellar Medium

The Astrophysical Journal
A classic problem in the study of the interstellar medium (ISM) is the near-invisibility of molecular hydrogen (H _2 ) in cold environments. Observations of CO emission are typically used to indirectly trace H _2 , but a significant fraction of H _2 in ...
Daniel R. Rybarczyk, Michael P. Busch, J. R. Dawson, Min-Young Lee, Gan Luo   +4 more
doaj   +1 more source

The sustainable global energy economy: Hydrogen or silicon? [PDF]

, 2008
A sustainable global silicon energy economy is proposed as a potential alternative to the hydrogen economy. This first visualisation of a silicon energy economy is based on largescale and carbon-neutral metallic silicon production from major smelters ...
Bardsley, W. Earl
core   +1 more source

Mapping a Lower Limit on the Mass Fraction of the Cold Neutral Medium Using Fourier-transformed H i 21 cm Emission Line Spectra: Application to the DRAO Deep Field from DHIGLS and the HI4PI Survey

The Astrophysical Journal
We develop a new method for spatially mapping a lower limit on the mass fraction of the cold neutral medium by analyzing the amplitude structure of ${\hat{T}}_{b}({k}_{v})$ , the Fourier transform of T _b ( v ), the spectrum of the brightness temperature
Antoine Marchal, Peter G. Martin, Marc-Antoine Miville-Deschênes, Naomi M. McClure-Griffiths, Callum Lynn, Andrea Bracco, Luka Vujeva   +6 more
doaj   +1 more source

Impact of Hydrogen Release on Accidental Consequences in Deep-Sea Floating Photovoltaic Hydrogen Production Platforms

Hydrogen
Hydrogen is a potential key component of a carbon-neutral energy carrier and an input to marine industrial processes. This study examines the consequences of coupled hydrogen release and marine environmental factors during floating photovoltaic hydrogen ...
Kan Wang, Jiahui Mi, Hao Wang, Xiaolei Liu, Tingting Shi   +4 more
doaj   +1 more source

Power-to-Hydrogen and Hydrogen-to-X : system Analysis of the techno-economic, legal, and regulatory conditions

, 2021
P2X pathway definitions has the aim to clarify terminologies that are often used but with different meanings or intentions which leads to misunderstanding and ambiguity.
Funez, C., Mansilla, C., Prost, J., Dickinson, R., Lucchese, P., Samsatli, S., Leaver, Jonathan, Grand-Clement, L., Tilli, O.   +8 more
core  

Discovery of a Large-scale H i Plume in the NGC 7194 Group

The Astrophysical Journal Letters
We present the discovery of a new H i structure in the NGC 7194 group from the observations using the Karl G. Jansky Very Large Array. NGC 7194 group is a nearby ( z ∼ 0.027) small galaxy group with five quiescent members.
Mina Pak, Junhyun Baek, Joon Hyeop Lee, Aeree Chung, Matt Owers, Hyunjin Jeong, Eon-Chang Sung, Yun-Kyeong Sheen   +7 more
doaj   +1 more source