Results 111 to 120 of about 51,739 (211)

Interstellar clouds containing optically thick H2

The Astrophysical Journal, 1975
The theory of Black and Delgarno that the relative populations of the excited rotational levels of H2 can be understood in terms of cascading following absorption in the Lyman and Werner bands is employed to infer the gas densities and radiation fields within diffuse interstellar clouds containing H2 that is optically thin in those bands.
openaire   +1 more source

Analysis of ultraviolet spectrophotometric data from Copernicus [PDF]

Ultraviolet spectral data from the OAO 3 satellite are being used to study interstellar absorption lines and stellar and circumstellar lines in hot stars.
Snow, T. P., Jr.
core   +1 more source

Strength Ratios of Diffuse Interstellar Bands in Slightly Reddened Objects

Universe
The disk of the Milky Way fills the interstellar medium in the form of discrete clouds, many (∼30) light-years across. The average density of this medium is 1 hydrogen atom per cm3 (Oort limit), in the clouds—several dozen atoms, and between the clouds ...
Jacek Krełowski, Arkadii Bondar
doaj   +1 more source

Cloud-cloud collisions in the interstellar medium

The Astrophysical Journal, 1980
Results are presented from time-dependent numerical simulations of cloud-cloud collisions in the interstellar medium. Special emphasis is placed on physically detailed models of cloud collisions. The numerical simulations include heating, cooling, thermal conductivity, self-gravity, and molecule formation; magnetic fields have been neglected.
openaire   +1 more source

The Passage of the Solar System through the Edge of the Local Bubble

The Astrophysical Journal
The Sun moves through the interstellar medium (ISM) at a velocity of ∼19 pc Myr ^−1 , making the conditions outside the solar system vary with time over millions of years.
Merav Opher, Abraham Loeb, Catherine Zucker, Alyssa Goodman, Ralf Konietzka, Alexandra Z. Worden, Evan P. Economo, Jesse A. Miller, João Alves, Jonathan Grone, Marc Kornbleuth, J. E. G. Peek, Michael M. Foley   +12 more
doaj   +1 more source

Interstellar cloud morphologies and their origins

Open Astronomy, 1994
Gahm G.F.
doaj   +1 more source

Modeling the Far-infrared Polarization Spectrum of a High-mass Star-forming Cloud

The Astrophysical Journal
The polarization spectrum, or wavelength dependence of the polarization fraction, of interstellar dust emission provides important insights into the grain alignment mechanism of interstellar dust grains.
Dennis Lee, Che-Yu Chen, Giles Novak, David T. Chuss, Erin G. Cox, Kaitlyn Karpovich, Peter Ashton, Marc Berthoud, Zhi-Yun Li, Joseph M. Michail   +9 more
doaj   +1 more source

Direct Samples of Interstellar and Interplanetary Material with IMAP. [PDF]

Space Sci Rev
Szalay JR, Provornikova E, Ayari E, Bzowski M, Christian ER, Funsten HO, Galli A, Gkioulidou M, Horányi M, Livi S, McComas DJ, Möbius E, Ogasawara K, Rahmanifard F, Rankin JS, Reisenfeld DB, Schwadron NA, Sternovsky Z, Swaczyna P, Turner D, Zank GP, Zirnstein EJ.   +21 more
europepmc   +1 more source

Increased and varied radiation during the Sun's encounters with cold clouds in the last 10 million years. [PDF]

Sci Rep
Opher M, Giacalone J, Loeb A, Economo EP, Cummings A, Middleton J, Zucker C, Miller JA, Nica A, Hatzaki M.   +9 more
europepmc   +1 more source

Atom Addition Formation of Thionylimide (HNSO) on Interstellar Dust Grains: Chemical Routes Requiring Oxygen and Nitrogen Atom Surface Diffusion. [PDF]

ACS Earth Space Chem
Del Valle JC, Sanz-Novo M, Kästner J, Furuya K, Rivilla VM, Martín-Doménech R, Molpeceres G.   +6 more
europepmc   +1 more source