Results 91 to 100 of about 501,439 (210)
Enigma of H 3 + in Diffuse Interstellar Clouds [PDF]
, 2003 H 3 + is of fundamental importance to interstellar chemistry both because it is a hydrogenic species (and >9O% of all nuclei in the universe are hydrogen nuclei; see Fig. 1) and because it serves as the universal protonator, initiating a chain of ion-neutral reactions that is responsible for the formation of most interstellar molecules.
Benjamin J. McCall, Takeshi Oka
openaire +1 more source
Submillimetre molecular line observations and modelling of molecular clouds. [PDF]
, 1985 PhDSubmillimetre molecular line observations of molecular clouds in our galaxy are presented, and the data analysed using various alternative cloud models.
Richardson, Kevin John
core +2 more sources
Silicate Extinction Profile Based on the Stellar Spectrum by Spitzer/IRS
The Astrophysical JournalThe 9.7 and 18 μ m interstellar spectral features, arising from the Si–O stretching and O–Si–O bending modes of amorphous silicate dust, are the strongest extinction features in the infrared.
Zhenzhen Shao, Biwei Jiang
doaj +1 more source
Interstellar Migration, the Population ‘Problem’ and the Climate Emergency
Critical Quarterly, Volume 68, Issue 1, Page 103-119, April 2026.
Anna Hartnell
wiley +1 more source
Dynamically dominant magnetic fields in the diffuse interstellar medium
Observations show that magnetic fields in the interstellar medium (ISM) often to not respond to increases in gas density as would be naively expected for a frozen-in field. This may suggest that the magnetic field in the diffuse gas becomes detached from
Shukurov A, Korpi M, Fletcher A
core +4 more sources
The 5780-diffuse Band In Peculiar Interstellar Clouds
, 1992 This paper presents the spectra of a sample of galactic stars in which the broad diffuse interstellar band at 5780 angstrom is strongly attenuated in relation to their colour excess and the neighbour feature at 5797 angstrom is absent.
J. KRELOWSKI +2 more
core
Investigation into Triggered Star Formation by Radiative Driven Implosion [PDF]
, 2016 When massive stars form, they emit strong, hydrogen ionising radiation fields into their molecular cloud environment, forming HII regions. This is believed to be capable of inducing effects which can trigger further star formation through a process known
Kinnear, Timothy Michael
core
The carbon abundance in diffuse interstellar clouds
The Astrophysical Journal, 1981 When N/sub H2/roughly-equal1-40 x 10/sup 19/ cm/sup -2/ in a given direction, or f equivalent 2N/sub H2//N/sub H/>10/sup -1.4/, the column densities of C I and H/sub 2/ are strongly correlated even though N/sub C/ /sub i/ and N/sub H/ are not. All or most of the observed C I in such directions is harbored by a single, predominantly molecular (H/sub 2/>>
openaire +1 more source
The diffuse interstellar features and interstellar relationships [PDF]
, 1990 This thesis describes the results of a survey of the diffuse interstellar features towards about 120 stars. The observations, the data reduction and the measurement of the strengths of the diffuse features are described.
Fossey, Stephen John
core +1 more source
A search for naphthalene in diffuse interstellar clouds
, 2011 We have obtained high resolution optical spectroscopy of 10 reddened O-type stars with UVES at VLT to search for interstellar bands of the naphthalene cation (C$_{10}$H$_{8}$$^+$) in the intervening clouds. No absorption features were detected near the laboratory strongest band of this cation at 6707 Åexcept for star HD 125241 (O9 I).
Iglesias-Groth, Susana +2 more
openaire +2 more sources