dc.contributor.author | ESPEY, BRIAN RUSSELL | |
dc.date.accessioned | 2008-06-19T14:41:32Z | |
dc.date.available | 2008-06-19T14:41:32Z | |
dc.date.issued | 1998 | |
dc.date.submitted | 1998 | en |
dc.identifier.citation | Jennifer J. Birriel, Brian R. Espey and Regina E. Schulte-Ladbeck. 'Near-simultaneous observations of direct and Raman-scattered Lines in the Symbiotic Star Z Andromedae' in Astrophysical Journal, 507, 1998, pp. L75 ? L78. | en |
dc.identifier.issn | 51355 | |
dc.identifier.other | Y | |
dc.identifier.other | Y | en |
dc.description | PUBLISHED | en |
dc.description.abstract | Symbiotic binary stars typically consist of a hot compact star orbiting a cool giant. Overlaid on the continuum from these stars is a nebular spectrum produced by the photoionization of the cool star wind by the hot star. Most of the observed emission lines are readily identifiable with common ions; however, a pair of lines at lambdalambda6825 and 7082 remained unidentified until relatively recently. A case has been made that these long-unidentified emission lines result from the Raman scattering of O vi lambdalambda1032, 1038 resonance photons. We present near-simultaneous far-UV and optical observations of the symbiotic star Z Andromedae, obtained with the space-borne Hopkins Ultraviolet Telescope and the Mount Hopkins 1.5 m telescope. Our data show the presence of both the O vi lambdalambda1032, 1038 resonance doublet and the lambda6825 and lambda7082 emission lines and provide strong evidence for the Raman effect in Z And. We show that the unusual line ratio of 7:1 observed for the O vi lines is due to the effects of interstellar H_2 absorption. Correction for this effect results in a line ratio of close to2:1, consistent with optically thin emission. We derive the efficiency for the Raman-scattered O vi lines and compare them with previously reported measurements for RR Telescopii. | en |
dc.format.extent | L75 | en |
dc.format.extent | L78 | en |
dc.format.extent | 227950 bytes | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en | en |
dc.publisher | American Astronomical Society | en |
dc.relation.ispartofseries | 507 | en |
dc.rights | Y | en |
dc.subject | Physics | en |
dc.title | Near-simultaneous observations of direct and Raman-scattered Lines in the Symbiotic Star Z Andromedae | en |
dc.type | Journal Article | en |
dc.type.supercollection | scholarly_publications | en |
dc.type.supercollection | refereed_publications | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/espeyb | |
dc.identifier.rssuri | http://www.journals.uchicago.edu/doi/pdf/10.1086/311673 | |
dc.identifier.uri | http://hdl.handle.net/2262/17446 | |