Results 61 to 70 of about 21,926 (193)
Diffuse Interstellar Bands in z < 0.6 CaII Absorbers
, 2007 The diffuse interstellar bands (DIBs) probably arise from complex organic molecules whose strength in local galaxies correlates with neutral hydrogen column density, N(HI), and dust reddening, E(B-V).
Ellison, Sara L. +5 more
core +1 more source
Space Weather, Volume 24, Issue 5, May 2026.Abstract We report new measurements of high‐energy protons ejected by the sun during the May 2024 Ganon superstorm. Our observations were made by the Neutron Spectrometer (NS) on the Psyche spacecraft, which was located at a solar distance of approximately 2 AU and a Sun‐Earth‐Probe separation angle of 75°.
Madison Liebel +3 more
wiley +1 more source
Electronic Spectroscopy of C60+ and Its Analogs C60H2O+, C60H+, C60D+, and C60Mg+
The Astrophysical JournalThe fullerenes C _60 and C _70 have been detected in various interstellar environments, and the cation ${{{\rm{C}}}_{60}}^{+}$ has been identified as a carrier of at least four of the diffuse interstellar bands (DIBs). Based on the presence of fullerenes
Lisa Ganner +6 more
doaj +1 more source
Optical Spectroscopy of a post-AGB star HD 187885
Open Astronomy, 2013 The physical parameters of the atmosphere and its chemical composition for a post-AGB star HD 187885 are determined from high resolution spectra. The effective temperature Teff = 8000 ± 200 K and the surface gravity log g = 1.0 ± 0.3 were derived.
Kipper Tõnu
doaj +1 more source
Modeling the Detectability of Energetic Heliospheric Ions at Pluto During the New Horizons Flyby
Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.Abstract We investigate the detectability of heliospheric helium ions at energies up to 100 keV by the New Horizons (NH) spacecraft during its flyby through Pluto's induced magnetosphere. The Pluto Energetic Particle Spectrometer Science Investigation energetic ion detector observed a reduction in their flux by an order of magnitude as the spacecraft ...
Randall T. Ruch +3 more
wiley +1 more source
Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.Abstract Xenon (Xe) is a heavy noble gas with intriguing chemical properties, such as having several stable isotopes and the ability to form compounds under extreme conditions. Despite the predictions based on cosmochemical models that suggest xenon should be relatively abundant in planetary reservoirs, empirical data indicate a significant depletion ...
Avinash Kumar Both +2 more
wiley +1 more source
The Astrophysical JournalUnderstanding variations in the dust extinction curve is imperative for using dust as a tracer of local structure in the interstellar medium, understanding dust chemistry, and performing extinction corrections.
Andrew K. Saydjari, Gregory M. Green
doaj +1 more source
, 2008 The first optical spectrum of an isolated polycyclic aromatic hydrocarbon large enough to survive the photophysical conditions of the interstellar medium is reported.
Damian L. Kokkin +16 more
core +1 more source
The use of Planetary Nebulae precursors in the study of Diffuse Interstellar Bands [PDF]
, 2005 We present the first results of a systematic search for Diffuse Interstellar Bands in a carefully selected sample of post-AGB stars observed with high resolution optical spectroscopy.
Garcia-Lario, P. +2 more
core +3 more sources
Diffuse Interstellar Bands as Probes of Small-Scale Interstellar Structure [PDF]
Proceedings of the International Astronomical Union, 2013 AbstractWe present observations which probe the small-scale structure of the interstellar medium using diffuse interstellar bands (DIBs). Towards HD 168075/6 in the Eagle Nebula, significant differences in DIB absorption are found between the two lines of sight, which are separated by 0.25 pc, and λ 5797 exhibits a velocity shift.
Smith, Keith T. +2 more
openaire +2 more sources