Voyager Observations of Diffuse Far-Ultraviolet Continuum and Line Emission in Eridanus

Abstract

view Abstract Citations (16) References (29) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Voyager Observations of Diffuse Far-Ultraviolet Continuum and Line Emission in Eridanus Murthy, Jayant ; Im, M. ; Henry, R. C. ; Holberg, J. B. Abstract We present Voyager observations of the diffuse far-ultraviolet radiation field (912 Å-1150 Å) in two regions of the Eridanus superbubble A strong continuum is present in both locations which we have identified with starlight scattered by interstellar dust. From the level of this emission (1620‰150 photons cm-2 s-1 sr-1 Å-1) we have placed a lower limit of about 0.3 on the albedo if the scattering is isotropic and an upper limit of about 0.8 on the phase function asymmetry factor (g) if the grains are perfectly reflecting. In addition, O VI (λλ1032/1038) emission with an intensity of 28.7±2.8 × 104 photons cm-2 s-1 sr-1 is apparent in one of the two locations, and C III (977 Å) is visible in both locations with intensities of 2.14±0.75 × 104 and 18.9±1.7 × 104 photons cm-2 s-1 sr-1. The line ratios indicate shock velocities on the order of 90 km s-1 in one of the targets and 180 km s-1 in the other, which is located near a peak of the C-band X-ray emission. Publication: The Astrophysical Journal Pub Date: December 1993 DOI: 10.1086/173524 Bibcode: 1993ApJ...419..739M Keywords: COSMOLOGY: DIFFUSE RADIATION; ISM: BUBBLES; ISM: INDIVIDUAL NAME: ERIDANUS; ULTRAVIOLET: INTERSTELLAR full text sources ADS | data products SIMBAD (9)