197 citations · 2.4k across the 71 of their papers we have counts for
6 papers · 1 filter
Discovery of a transparent sightline at ρ < 20 kpc from an interacting pair of galaxies
Sean D. Johnson, Hsiao-Wen Chen, John S. Mulchaey +3
We report the discovery of a transparent sightline at projected distances of ρ < 20 kpc to an interacting pair of mature galaxies at z = 0.12. The sightline of the UV-bright quasar…
Spatially Resolved Velocity Maps of Halo Gas Around Two Intermediate-redshift Galaxies
Hsiao-Wen Chen, Jean-Rene Gauthier, Keren Sharon +3
Absorption-line spectroscopy of multiply-lensed QSOs near a known foreground galaxy provides a unique opportunity to go beyond the traditional one-dimensional application of QSO pr…
Probing the IGM-galaxy connection at z<0.5 II. New insights into the galaxy environments of OVI absorbers in PKS 0405-123
Sean D. Johnson, Hsiao-Wen Chen, John S. Mulchaey
We present new absorption-line analysis and new galaxy survey data obtained for the field around PKS0405-123 at z=0.57. Combining previously known OVI absorbers with new identifica…
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…
The optical photometric and spectroscopic investigation of Type IIP supernova 2012A
Rupak Roy, Firoza Sutaria, Subhash Bose +11
Supernova 2012A was discovered on 7.39UT, January, 2012 in the nearby galaxy NGC 3239 at an unfiltered magnitude of 14.6 and classified spectroscopically as a Type IIP event. Here,…
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…