Results 71 to 80 of about 2,707,906 (194)

Discovery of Molecular and Atomic Gas Associated with HESS J1646−458 (Westerlund 1): Spatial TeV Gamma-Ray and Interstellar Proton Correspondence

open access: yesThe Astrophysical Journal
Abstract We report CO and H i studies of molecular and atomic gas toward the TeV gamma-ray source HESS J1646−458, widely considered to be associated with the young massive cluster Westerlund 1 (Wd1). We found that molecular clouds at V
H. Sano   +23 more
openaire   +2 more sources

Interstellar molecule formation [PDF]

open access: yes, 1966
Interstellar molecule formation by chemical exchange reactions between interstellar gas atoms and atoms chemically bound to interstellar ...
Williams, D. A., Stecher, T. P.
core  

Cold Molecular Gas in the Diffuse Interstellar Medium

open access: yes, 2018
Stars form during the collapse of cold, dense interstellar clouds. To learn more about the conditions that precede star formation, we wanted to know how such dense clouds form in turn from the ambient interstellar medium.
Jolly, Christian
core   +1 more source

Evaluating maturity of organic matter in hydrated C1 and CM‐like clasts and a dehydrated clast within a polymict eucrite and a howardite

open access: yesMeteoritics &Planetary Science, Volume 61, Issue 8, Page 1965-1993, August 2026.
Abstract Volatile‐rich xenolithic clasts in different types of brecciated meteorites represent unique pristine solar system material. This study investigates the maturity and thermal history of organic matter using Raman spectroscopy and aqueous alteration effects using infrared spectroscopy in the matrix of 15 volatile‐rich clasts (C1 and CM‐like ...
Swarna Prava Das   +7 more
wiley   +1 more source

Oxygen in the interstellar medium

open access: yes, 2008
The oxygen that is observed in the Solar System today is a remnant of the interstellar oxygen that was in the dense molecular cloud that collapsed to form the Solar System.
Jensen, Adam G.   +3 more
core   +1 more source

Electronic spectroscopy of cold ions in a radio-frequency trap [PDF]

open access: yes, 2010
The low density of ions in mass spectrometers generally precludes direct absorption measurements. The spectrum of ions can nonetheless be obtained by using resonance two-color photofragmentation or multiphoton photofragmentation techniques.
Rudnev, Vitaly S.
core   +1 more source

15 yr of Interstellar Neutral Hydrogen Observed with the Interstellar Boundary Explorer

open access: yesThe Astrophysical Journal Supplement Series
The interactions of our heliosphere with the surrounding local interstellar medium (LISM) lead to a range of observable phenomena such as energetic neutral atoms (ENAs) from the boundary regions of the heliosphere and the influx of interstellar neutrals (
André Galli   +13 more
doaj   +1 more source

Raman analysis of organic refractory materials after energetic processing: Evidence for amorphous carbon on TNOs and comets

open access: yesMeteoritics &Planetary Science, Volume 61, Issue 8, Page 1994-2015, August 2026.
Abstract Amorphous carbon (αC) is found in various extraterrestrial particles, including those thought to originate from the outer Solar System. αC can form through two main processes involving C‐rich materials: exposure to energetic charged particles and thermal processing.
M. Germanà   +10 more
wiley   +1 more source

Interstellar gas dynamics

open access: yes, 1966
Interstellar Gas ...
Kahn, FD, Kaplan, SA
core  

Excess depletion of Al, Ca, Ti from interstellar gas [PDF]

open access: yes, 1986
Thermal condensation, cold sticking, and sputtering by interstellar shock are combined with a chemical memory of the condensation sequence to account for depletion of aluminum, calcium, and titanium in interstellar gas.
Clayton, D. D.
core  

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