Results 21 to 30 of about 5,560 (224)
Absorption spectroscopy of carbon and sulfur chains in 6 K neon matrices [PDF]
, 2008 Matrix isolation is challenged by a variety of laser-based techniques, which, in the gas phase, have demonstrated their ability to obtain high-resolution vibrational and electronic spectra of transient molecules, free of possible perturbation by the ...
Shnitko, Ivan G.
core +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
Investigating the nature of absorption lines in the Chandra X-ray spectra of the neutron star binary 4U 1820−30 [PDF]
, 2008 We use four Chandra gratings spectra of the neutron star low-mass X-ray binary 4U 1820–30 to better understand the nature of certain X-ray absorption lines in X-ray binaries, including the Ne II, Ne III, Ne IX, O VII, and O VIII lines.
R. Wijnands +18 more
core +1 more source
Creating a new paradigm for the local interstellar medium–A perspective
Frontiers in Astronomy and Space Sciences, 2023 The interstellar medium close to the Sun called the local ISM (LISM) provides critical insights into physical processes and phenomena in the more distant interstellar medium in our Galaxy without the confusion of many complex structures in the sight ...
Jeffrey L. Linsky, Seth Redfield
doaj +1 more source
Interstellar Absorption of Some Be Stars [PDF]
International Astronomical Union Colloquium, 1987 It is well known that the intrinsic colors of Be stars are not the same as those of “normal” B stars and they are often redder. So interstellar absorption of Be stars determined from photometric indices may be overestimated. In order to avoid this, a method often used to determine the interstellar absorption of Be stars is based on the ultraviolet ...
D. Briot, J. Zorec
openaire +1 more source
Abundance Ratios of OH/CO and HCO+/CO as Probes of the Cosmic-Ray Ionization Rate in Diffuse Clouds
The Astrophysical Journal, 2023 The cosmic-ray ionization rate (CRIR, ζ _2 ) is one of the key parameters controlling the formation and destruction of various molecules in molecular clouds. However, the current most commonly used CRIR tracers, such as ${{\rm{H}}}_{3}^{+}$ , OH ^+ , and
Gan Luo +8 more
doaj +1 more source
A search for interstellar absorptions towards Sgr dSph [PDF]
Astronomy & Astrophysics, 2005 accepted by Astronomy & ...
Monai, S., Bonifacio, P., Sbordone, L.
openaire +2 more sources
Distribution of Interstellar Reddening Material in the Galactic Plane [PDF]
Journal of Astronomy and Space Sciences, 1987 By using the recently determined color excess and distance data of classical cepheids by Kim(1985), the distribution of interstellar reddening material was studied to see the general picture of the average rate of interstellar absorption out to about 7 ...
Chulhee Kim
doaj
Observations of Multiphase, High-velocity, Shocked Gas in the Vela Supernova Remnant
The Astrophysical Journal, 2023 We present an analysis of high-resolution far-UV archival spectra obtained with the Space Telescope Imaging Spectrograph on the Hubble Space Telescope of the star HD 75309, which probes high-velocity shocked gas in the Vela supernova remnant (SNR).
Adam M. Ritchey
doaj +1 more source
Angewandte Chemie International Edition, EarlyView.Azidoborylene photolysis results in the isolation of a reactive C═B═N═C heterocumulene bearing an ambiphilic boron centre. Addition of 3O2 to this species results in the clean conversion to a unique example of a dioxaborirane. ABSTRACT Oxidation of the formal boron(0) complex MeCAAC2B in the presence of tetrabutylammonium azide leads to the formation ...
Hayley King +4 more
wiley +1 more source