Results 11 to 20 of about 1,217 (186)
High‐Pressure Carbonaceous Phases as Minerals
Geophysical Monograph Series, Page 11-23., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Oliver Tschauner
wiley +1 more source
X‐Ray Absorption Line Spectroscopy of the Galactic Hot Interstellar Medium [PDF]
The Astrophysical Journal, 2005 This is the pre-published version harvested from ArXiv. The published version is located at http://iopscience.iop.org/0004-637X/624/2/751/
Yao, Y, Wang, QD
openaire +3 more sources
Interstellar absorption lines toward Cep OB4 [PDF]
Astronomy & Astrophysics, 2004 An analysis of optical echelle spectra towards nine stars in the Cep OB4 association is presented. Interstellar absorption lines which arise in the (1, 0) and (2,0) bands of the CN A 2 Π - X 2 Σ + red system towards BD+66° 1661, BD+66° 1674, and BD+66° 1675 are used to infer accurate CN column densities N(CN).
openaire +1 more source
The Astrophysical Journal, 2023 Molecules and particles make up ∼40%–70% of carbon in the interstellar medium, yet the exact chemical structure of these constituents remains unknown. We present carbon K-shell absorption spectroscopy of the Galactic interstellar medium obtained with the
John Staunton, Frits Paerels
doaj +1 more source
Narrow absorption lines from intervening material in supernovae
Astronomy & AstrophysicsNarrow interstellar absorption features in supernova (SN) spectra serve as valuable diagnostics for probing dust extinction and the presence of circumstellar or interstellar material.
Gutiérrez Claudia P. +3 more
doaj +1 more source
Interstellar absorption lines in the spectrum of 3C 273
The Astrophysical Journal, 1983 Absorption lines near the rest wavelengths of the Si IV doublet (wavelengths 1393.76, 1402.77) with equivalent widths 533 and 235 mA are reported in the spectrum of QSO 3C 273. The profiles show the nature of hot gas along a high-latitude (b = 64 deg) line of sight through our entire halo.
D. G. York +5 more
openaire +1 more source
The Astrophysical Journal Letters, 2023 Direct observations of low-mass, low-metallicity galaxies at z ≳ 4 provide an indispensable opportunity for detailed inspection of the ionization radiation, gas flow, and metal enrichment in sources similar to those that reionized the universe. Combining
Xiaojing Lin +21 more
doaj +1 more source
Interstellar absorption lines in the spectrum of Gamma Velorum
The Astrophysical Journal, 1979 Copernicus scans of selected interstellar absorption lines in the UV spectrum of Gamma Vel are analyzed, together with ground-based data, to obtain column densities for various ion states of C, N, O, Na, Mg, Al, Si, P, S, Cl, Ar, Ca, Mn, Fe, and CO. N I and O I are fitted to a single empirical curve of growth with a velocity parameter (b) of 8 km/s; Mg
D. C. Morton, S. P. Bhavsar
openaire +1 more source
Interstellar Absorption Lines in the Direction of the Cataclysmic Variable SS Cygni [PDF]
Publications of the Astronomical Society of the Pacific, 2013 We present an analysis of interstellar absorption lines in high-resolution optical echelle spectra of SS Cyg obtained during an outburst in 2013 June and in archival Hubble Space Telescope and Far Ultraviolet Spectroscopic Explorer data. The Ca II K and Na I D lines toward SS Cyg are compared with those toward nearby B and A stars in an effort to place
Ritchey, Adam M. +2 more
openaire +3 more sources
The Astrophysical Journal Supplement Series, 2023 High-resolution absorption, dispersed fluorescence emission, and photoionization cross sections are presented for gas-phase adamantane excited by synchrotron radiation in the exciting-photon energy range of 6–30 eV. Relative and absolute absorption cross
Lutz Marder +11 more
doaj +1 more source