72 citations · 125 across the 2 of their papers we have counts for
6 papers
Anomalous Diffuse Interstellar Bands in the Spectrum of Herschel 36. I. Observations of Rotationally Excited CH and CH+ Absorption and Strong, Extended Redward Wings on Several DIBs
Julie Dahlstrom, Donald G. York, Daniel E. Welty +9
Anomalously broad diffuse interstellar bands (DIBs) at 5780.5, 5797.1, 6196.0, and 6613.6 A are found in absorption along the line of sight to Herschel 36, the star illuminating th…
Anomalous Diffuse Interstellar Bands in the Spectrum of Herschel 36. II. Analysis of Radiatively Excited CH+, CH, and DIBs
Takeshi Oka, Daniel E. Welty, Sean Johnson +3
Absorption spectra toward Herschel 36 for the A^1Pi <-- X^1Sigma transitions of CH+ in the J=1 excited rotational level and the A^2Delta <-- X^2Pi transition of CH in the J=3/2 exc…
Studies of Diffuse Interstellar Bands. V. Pairwise Correlations of Eight Strong DIBs and Neutral Hydrogen, Molecular Hydrogen, and Color Excess
Scott D. Friedman, Donald G. York, Benjamin J. McCall +7
We establish correlations between equivalent widths of eight diffuse interstellar bands (DIBs), and examine their correlations with atomic hydrogen, molecular hydrogen, and EB-V .…
Interstellar Metastable Helium Absorption as a Probe of the Cosmic-Ray Ionization Rate
Nick Indriolo, L. M. Hobbs, K. H. Hinkle +1
The ionization rate of interstellar material by cosmic rays has been a major source of controversy, with different estimates varying by three orders of magnitude. Observational con…
The Red Rectangle: Its Shaping Mechanism and its Source of Ultraviolet Photons
Adolf N. Witt, Uma P. Vijh, L. M. Hobbs +3
The proto-planetary Red Rectangle nebula is powered by HD 44179, a spectroscopic binary (P = 318 d), in which a luminous post-AGB component is the primary source of both luminosity…
Rejection of the C7- Diffuse Interstellar Band Hypothesis
B. J. McCall, J. Thorburn, L. M. Hobbs +2
Using the new high resolution (~ 8 km/s) echelle spectrograph on the 3.5-m telescope at the Apache Point Observatory, we have begun a high sensitivity survey of the diffuse interst…