Results 71 to 80 of about 2,145,468 (291)

The Simons Observatory: Galactic Science Goals and Forecasts

The Astrophysical Journal, 2022
Observing in six frequency bands from 27 to 280 GHz over a large sky area, the Simons Observatory (SO) is poised to address many questions in Galactic astrophysics in addition to its principal cosmological goals.
Brandon S. Hensley, Susan E. Clark, Valentina Fanfani, Nicoletta Krachmalnicoff, Giulio Fabbian, Davide Poletti, Giuseppe Puglisi, Gabriele Coppi, Jacob Nibauer, Roman Gerasimov, Nicholas Galitzki, Steve K. Choi, Peter C. Ashton, Carlo Baccigalupi, Eric Baxter, Blakesley Burkhart, Erminia Calabrese, Jens Chluba, Josquin Errard, Andrei V. Frolov, Carlos Hervías-Caimapo, Kevin M. Huffenberger, Bradley R. Johnson, Baptiste Jost, Brian Keating, Heather McCarrick, Federico Nati, Mayuri Sathyanarayana Rao, Alexander van Engelen, Samantha Walker, Kevin Wolz, Zhilei Xu, Ningfeng Zhu, Andrea Zonca   +33 more
doaj   +1 more source

Unusually Weak Diffuse Interstellar Bands toward HD 62542 [PDF]

, 2001
As part of an extensive survey of diffuse interstellar bands (DIBs), we have obtained optical spectra of the moderately reddened B5V star HD 62542, which is known to have an unusual UV extinction curve of the type usually identified with dark clouds. The
Adamson A. J., Benjamin J. McCall, Cami J., Daniel E. Welty, Donald G. York, Ehrenfreund P., Gredel R., Gredel R., Gredel R., Heger M. L., Jenniskens P., Jenniskens P., Jenniskens P., Julie Thorburn, Kerr T. H., Krelowski J., L. M. Hobbs, Leger A., Paule Sonnentrucker, Sarre P. J., Snow T. P., Snow T. P., Sonnentrucker P., Sonnentrucker P., Theodore P. Snow, van der Zwet G. P., Walker D. D.   +26 more
core   +3 more sources

Structure, spectroscopic signatures, and formation of hydroxy-azirine: a potential interstellar prebiotic molecule [PDF]

, 2023
Pilar Redondo, Miguel Sanz‐Novo, Carmen Barrientos, Antonio Largo   +3 more
openalex   +1 more source

Reaction Kinetics of CN + Toluene and Its Implication on the Production of Aromatic Nitriles in the Taurus Molecular Cloud and Titan’s Atmosphere

The Astrophysical Journal, 2023
Reactions between cyano radicals and aromatic hydrocarbons are believed to be important pathways for the formation of aromatic nitriles in the interstellar medium (ISM) including those identified in the Taurus molecular cloud (TMC-1).
Mengqi Wu, Jiangbin Huang, Xiaoqing Wu, Qifeng Hou, Dongfeng Zhao, Feng Zhang   +5 more
doaj   +1 more source

Discovery of Interstellar Propylene (CH_2CHCH_3): Missing Links in Interstellar Gas-Phase Chemistry [PDF]

, 2007
We report the discovery of propylene (also called propene, CH_2CHCH_3) with the IRAM 30-m radio telescope toward the dark cloud TMC-1. Propylene is the most saturated hydrocarbon ever detected in space through radio astronomical techniques.
C. Thum, Cernicharo J., E. Roueff, Guelin M., J. Cernicharo, J. Martín-Pintado, Kaifu N., M. Agúndez, M. Gerin, N. Marcelino, R. Mauersberger   +10 more
core   +3 more sources

Over the possible role of metal atom clusters in cosmochemistry and in the origin of life

Revista de Química, 1992
We present here the hypothesis of a possible relationship between metal atom clusters and the formation of organic molecules in the interstellar medium and on small bodies as a possible pathway to the origin of such molecules.
Silvio Dioses Castro, Richard Korswagen
doaj  

Abundance Ratios of OH/CO and HCO+/CO as Probes of the Cosmic-Ray Ionization Rate in Diffuse Clouds

The Astrophysical Journal, 2023
The cosmic-ray ionization rate (CRIR, ζ _2 ) is one of the key parameters controlling the formation and destruction of various molecules in molecular clouds. However, the current most commonly used CRIR tracers, such as ${{\rm{H}}}_{3}^{+}$ , OH ^+ , and
Gan Luo, Zhi-Yu Zhang, Thomas G. Bisbas, Di Li, Ping Zhou, Ningyu Tang, Junzhi Wang, Pei Zuo, Nannan Yue   +8 more
doaj   +1 more source

Can neutral and ionized PAHs be carriers of the UV extinction bump and the diffuse interstellar bands?

, 2011
Up to now, no laboratory-based study has investigated polycyclic aromatic hydrocarbon (PAH) species as potential carriers of both the diffuse interstellar bands (DIBs) and the 2175 A UV bump.
Bouwman, Clayton, Draine, Ehrenfreund, F. Huisken, Frisch, Galazutdinov, J. Bouwman, Jenniskens, Kokkin, Léger, Léger, M. Steglich, Pino, Radzig, Salama, Salama, Sassara, Schnaiter, Schnaiter, Searles, Steglich, Steglich, Th. Henning, Troy   +24 more
core   +1 more source

Exploring the Effects of Reduced Gravitational Field Impacts on Convective Heat Transfer: A Comprehensive Review

Heat Transfer, Volume 55, Issue 1, Page 764-774, January 2026.
ABSTRACT This review explores the impact of gravitational instability on convective heat transfer, integrating existing research results and theoretical models. Gravitational instability is vital in promoting or hindering convective actions in different systems, such as atmospheric events, ocean currents, and industrial processes.
Hossam A. Nabwey, Muhammad Ashraf, A. M. Rashad, Ali J. Chamkha   +3 more
wiley   +1 more source

The Infrared Complex Refractive Index and Band Strengths of Coronene Thin Films

The Astrophysical Journal
Polycyclic aromatic hydrocarbon (PAH) molecules have long been theorized to be present in a multitude of interstellar environments. The radio-frequency detections of specific cyanosubstituted PAH molecules in the Taurus Molecular Cloud have provided new ...
J. E. Roser, L. Jovanović, A. Ricca
doaj   +1 more source