Results 11 to 20 of about 834,499 (261)

Efficient stabilization of cyanonaphthalene by fast radiative cooling and implications for the resilience of small PAHs in interstellar clouds. [PDF]

Nat Commun, 2023
After decades of searching, astronomers have recently identified specific Polycyclic Aromatic Hydrocarbons (PAHs) in space. Remarkably, the observed abundance of cyanonaphthalene (CNN, C_10H_7CN) in the Taurus Molecular Cloud (TMC-1) is six orders of ...
Stockett MH, Bull JN, Cederquist H, Indrajith S, Ji M, Navarro Navarrete JE, Schmidt HT, Zettergren H, Zhu B.   +8 more
europepmc   +2 more sources

Isomer-specific kinetics of the C⁺ + H₂O reaction at the temperature of interstellar clouds. [PDF]

Sci Adv, 2021
An important interstellar hydrocarbon chemical reaction has been measured in a laboratory. The reaction C+ + H2O → HCO+/HOC+ + H is one of the most important astrophysical sources of HOC+ ions, considered a marker for interstellar molecular clouds ...
Yang T, Li A, Chen GK, Yao Q, Suits AG, Guo H, Hudson ER, Campbell WC.   +7 more
europepmc   +2 more sources

Modelling the spinning dust emission from dense interstellar clouds [PDF]

, 2011
Electric dipole emission arising from PAHs is often invoked to explain the anomalous microwave emission (AME). This assignation is based on an observed tight correlation between the mid-IR emission of PAHs and the AME; and a good agreement between models
Ali-Haïmoud, Arzoumanian, Battistelli, Casassus, Castellanos, Compiègne, Dapp, Desert, Draine, Ferland, Goldsmith, Hoang, Juvela, Juvela, Juvela, Kogut, L. Verstraete, Le Petit, Leitch, Liszt, López-Caraballo, M. Juvela, Mathis, McCall, N. Ysard, Planck Collaboration, Planck Collaboration, Röllig, Shaw, Silsbee, Williams, Wolfire, Ysard, Ysard   +33 more
core   +3 more sources

Inhomogeneity within Local Interstellar Clouds [PDF]

Astronomical Journal, 2022
Analysis of interstellar absorption lines observed in high-resolution Hubble Space Telescope spectra of nearby stars provides temperatures, turbulent velocities, and kinetic properties of warm interstellar clouds.
J. Linsky, S. Redfield, Diana Ryder, Adina Chasan-Taber   +3 more
semanticscholar   +1 more source

Mixing Interstellar Clouds Surrounding the Sun [PDF]

Astrophysical Journal Letters, 2022
On its journey through the Galaxy, the Sun passes through diverse regions of the interstellar medium. High-resolution spectroscopic measurements of interstellar absorption lines in spectra of nearby stars show absorption components from more than a dozen
P. Swaczyna, N. Schwadron, E. Mobius, M. Bzowski, P. Frisch, J. Linsky, D. McComas, F. Rahmanifard, S. Redfield, R. Winslow, B. Wood, Gary P. Zank Department of Astrophysical Sciences, P. University, Princeton, Nj, Usa, S. Center, University of New Hampshire, Durham, Nh, Space Research Centre Pas, Warsaw, Poland., D. O. Astronomy, Astrophysics, U. Chicago, Chicago., Il, Jila, U. Colorado, Nist, Boulder, Co, Van Vleck Observatory, Wesleyan University, Middletown, Ct, Space Science Division, Naval Reserach Laboratory, Washington, Dc, Department of Materials Science, University of Alabama in Huntsville, Al.   +43 more
semanticscholar   +1 more source

Elemental nitrogen partitioning in dense interstellar clouds. [PDF]

Proc Natl Acad Sci U S A, 2012
Many chemical models of dense interstellar clouds predict that the majority of gas-phase elemental nitrogen should be present as N2, with an abundance approximately five orders of magnitude less than that of hydrogen.
Daranlot J, Hincelin U, Bergeat A, Costes M, Loison JC, Wakelam V, Hickson KM.   +6 more
europepmc   +3 more sources

Streaming instabilities in multicomponent interstellar clouds [PDF]

, 2008
Shaukat Ali Shan, H. Saleem, M. Sajid
openalex   +2 more sources

Extended Red Emission in High-Galactic Latitude Interstellar Clouds [PDF]

, 2008
We report initial results from an optical imaging survey of optically thin high Galactic latitude clouds, which is designed to study the surface brightness, structure, and spectral energy distribution of these objects. The primary aim of this paper is to
Adolf N. Witt, Steve Mandel, Paul H. Sell, Thomas Dixon, Karl D. Gordon, U. Vijh   +5 more
openalex   +2 more sources

Organic Molecules in Interstellar Space: Latest Advances [PDF]

Frontiers in Astronomy and Space Sciences, 2022
Although first considered as too diluted for the formation of molecules in-situ and too harsh an environment for their survival, the interstellar medium has turned out to host a rich palette of molecular species: to date, 256 species, not counting ...
M. Guélin, J. Cernicharo
semanticscholar   +1 more source

Modeling sulfur depletion in interstellar clouds [PDF]

Astronomy & Astrophysics, 2019
Context. The elemental depletion of interstellar sulfur from the gas phase has been a recurring challenge for astrochemical models. Observations show that sulfur remains relatively non-depleted with respect to its cosmic value throughout the diffuse and ...
J. Laas, P. Caselli
semanticscholar   +1 more source