Results 81 to 90 of about 1,113,005 (163)

An Ultraviolet Study of CO Chemistry in the Magellanic Clouds

The Astronomical Journal
How does molecular cloud chemistry change with metallicity? In this work, we study the relation between molecular hydrogen (H _2 ) and carbon monoxide (CO) at 1/2 and 1/5 solar metallicity using ultraviolet absorption spectroscopy obtained as part of the
Kirill Tchernyshyov, Jessica K. Werk, Julia Roman-Duval   +2 more
doaj   +1 more source

Photodissociation of interstellar N2 [PDF]

, 2013
Context. Molecular nitrogen is one of the key species in the chemistry of interstellar clouds and protoplanetary disks, but its photodissociation under interstellar conditions has never been properly studied. The partitioning of nitrogen between N and
Gibson, S.T., R. Visser, Xiaohu Li, van Dishoeck, E.F., Lewis, B.R., Heays, A., X. Li, Lewis, B., Van Dishoeck, E., Alan N. Heays, Wim Ubachs, Heays, A.N., Ubachs, W., Ubachs, W.M.G.; id_orcid, Ruud Visser, Dishoeck, E.F. van, Stephen T. Gibson, Li, X., E. F. van Dishoeck, Ewine F, Ubachs, W.M.G., Brenton R. Lewis, Visser, R., B. R. Lewis, Gibson, S., A. N. Heays, S. T. Gibson, W. Ubachs   +27 more
core   +1 more source

The ALMA-QUARKS Survey: Properties of Hot Molecular Fragments in the Massive Protocluster IRAS 17233–3606

The Astrophysical Journal
To investigate the physical mechanisms of fragmentation within the hot molecular core of the massive protocluster IRAS 17233-3606 (G351.78-0.54), we carried out a detailed analysis of continuum and lines using the Atacama Large Millimeter/submillimeter ...
Li Chen, Sheng-Li Qin, Dongting Yang, Wenyu Jiao, Tie Liu, Paul F. Goldsmith, Zhenying Zhang, Chuanshou Li, Fengwei Xu, Sami Dib, Shivani Gupta, Xindi Tang, Yaping Peng, Mengyao Tang, Mika Juvela, Di Li, Aiyuan Yang, Meizhu Liu, Lingmin Zhen, James O. Chibueze, L. Viktor Tóth, Ariful Hoque, Amelia M. Stutz, Leonardo Bronfman, Swagat R. Das, Pablo García, Kee-Tae Kim, Chang Won Lee, Jihye Hwang, Jiahang Zou, Yongqi Guo, Zhiping Kou   +31 more
doaj   +1 more source

Photoabsorption and photodissociation of molecules important in the interstellar medium [PDF]

, 1993
The photo absorption, photo dissociation, and fluorescence cross sections of interstellar molecules and radicals were measured in the vacuum ultraviolet region. These quantitative optical data are useful for understanding of the formation and destruction
Lee, Long C., Suto, Masako
core  

NEW INTERSTELLAR MOLECULES

, 1994
Author Institution: Division of Applied Sciences and Center for Astrophysics, Harvard UniversitySince 1968 interstellar and circumstellar molecules have been discovered at an average rate of nearly 4 per year, and there is no indication at the present ...
Thaddeus, P.
core   +1 more source

Formation of All Three C2H4O Isomers—Ethylene Oxide (c-C2H4O), Acetaldehyde (CH3CHO), and Vinyl Alcohol (CH2CHOH)—in Ethanol-containing Interstellar Analog Ices

The Astrophysical Journal
Oxygen-containing complex organic molecules are key precursors to biorelevant compounds fundamental for the origins of life. However, the untangling of their interstellar formation mechanisms has just scratched the surface, especially for oxygen ...
Jia Wang, Chaojiang Zhang, Joshua H. Marks, Ralf I. Kaiser   +3 more
doaj   +1 more source

Advection in photodissociation regions and its effects on the intensities of rotational lines of H(_2)O [PDF]

, 2008
A parameter based study has been carried out in order to investigate advection in photodissociation regions (PDRs) by using plane-parallel, semi-infinite assumption.
Akyilmaz Yabaci, Meltem
core  

Infrared Spectra of Solid HCN Embedded in Various Molecular Environments for Comparison with the Data Obtained with JWST

The Astrophysical Journal Letters
Hydrogen cyanide (HCN) molecules serve as an important tracer for the chemical evolution of elemental nitrogen in the regions of star and planet formation.
Maksim Ozhiganov, Mikhail Medvedev, Varvara Karteyeva, Ruslan Nakibov, Uliana Sapunova, Vadim Krushinsky, Ksenia Stepanova, Anastasia Tryastsina, Aleksandr Gorkovenko, Gleb Fedoseev, Anton Vasyunin   +10 more
doaj   +1 more source

The formation of interstellar diatomic molecules [PDF]

, 1972
Reactions between atoms and ions of the interstellar medium and vibrationally excited molecular hydrogen are shown to produce a specific set of molecules.
Williams, D. A., Stecher, T. P.
core  

Photochemistry and Astrochemistry: Photochemical Pathways to Interstellar Complex Organic Molecules

, 2017
The interstellar medium is characterized by a rich and diverse chemistry. Many of its complex organic molecules are proposed to form through radical chemistry in icy grain mantles. Radicals form readily when interstellar ices (composed of water and other
Oberg, Karin
core   +1 more source