Results 91 to 100 of about 1,811,090 (221)
Analysis of the 3.2–3.3 μm Interstellar Absorption Feature on Three Milky Way Sightlines
The Astrophysical JournalWe report new analyses of spectra of the 3.2–3.3 μ m absorption feature observed in the diffuse interstellar medium toward three Milky Way sources: 2MASS J 17470898 − 2829561 (2M1747) and the Quintuplet Cluster, both located in the Galactic center, and ...
L. S. Bernstein, T. R. Geballe
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The Astrophysical JournalNewly computed collisional rate coefficients for the excitation of C _2 in collisions with H _2 , presented recently by Najar & Kalugina, are significantly larger than the values adopted previously in models for the excitation of the C _2 molecule, a ...
David A. Neufeld +9 more
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On the long-wavelength absorption by interstellar dust
The Astrophysical Journal, 1991 Two proposed modifications to the standard theory for the long-wavelength absorption by interstellar dust grains are shown to be incorrect. The Mie theory for spheres or cylinders, or the discrete dipole approximation for irregular shapes, are based on Maxwell's equations for the electromagnetic field and should be used instead of the modified formula ...
openaire +1 more source
Revisiting the Ultraviolet Spectroscopy of the η Tel Edge-on Debris Disk
The Astronomical JournalWe revisit the ultraviolet absorption spectroscopy of the edge-on debris disk surrounding the A0V star η Telescopii. Previous work found absorption components at four velocities (∼−23, −18, −10, −1 km s ^−1 ), with the most blueshifted component (−23 km
Allison Youngblood +6 more
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GalaxiesThis work is dedicated to the study of interstellar medium (ISM) along the line of sight (LOS) of the transient low-mass X-ray binary, MXB 1659-298, capitalizing the high resolving power of XMM-Newton in the soft energy range.
Rabindra Mahato +2 more
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Loop I/NPS Morphology Predictions in the Ultralong-wavelength Band
The Astrophysical JournalLoop I/North Polar Spur (NPS) is the giant arc structure above the Galactic plane observed at radio wavelengths (≲10 GHz). There has been long-standing debate about its origin. While many people believe that it consists of nearby supernova remnants (SNRs)
Yanping Cong +5 more
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Cyclic C4+ as the Carrier of the Diffuse Interstellar Band at 503.9 nm?
The Astrophysical JournalThe diffuse interstellar bands (DIBs) have remained a mystery in astronomy since their discovery over a century ago. The only currently known carrier is ${{\rm{C}}}_{60}^{+}$ , responsible for five DIBs, while more than 550 are yet to be interpreted. The
Serge. A. Krasnokutski +7 more
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Dust Grain Chemistry in the Diffuse Interstellar Medium toward the Black Hole Transient GX 339–4
The Astrophysical JournalWe present results on X-ray absorption and the dust grain chemistry in the diffuse interstellar medium, based on a new Cycle 25 Chandra High Energy Transmission Grating Spectrometer (HETGS) observational campaign targeting the black hole transient GX 339–
I. Psaradaki +12 more
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Optical Interstellar Absorption Features [PDF]
Monthly Notices of the Royal Astronomical Society, 1968 W. Buscombe, P. M. Kennedy
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The Astrophysical JournalWe present some of the first infrared spectral maps acquired by SPHEREx. These maps, which to our knowledge are the largest of their type ever compiled in the near-infrared, reveal multiple strong lines due to interstellar ices and polycyclic aromatic ...
Joseph L. Hora +34 more
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