| タイトル | The Chandra Delta Ori Large Project: Occultation Measurements of the Shocked Gas tn the Nearest Eclipsing O-Star Binary |
| 本文（外部サイト） | http://hdl.handle.net/2060/20140010267 |
| 著者（英） | Hole, Tabetha; Hoffman, Jennifer; Maiz-Apellaniz, Jesus; Rauw, Gregor; Iping, Rosina; Nichols, Joy; Leutenegger, Maurice; Walborn, Nolan; Pollock, Andrew; Waldron, Wayne; Naze, Yael; Owocki, Stan; Moffat, Anthony; Richardson, Noel; Lomax, Jamie; Gull, Ted; Hamann, W. -R.; Hole, Tabetha; Evans, Nancy; Ignace, Rico; Russell, Chris; Corcoran, Michael F.; Hamaguchi, Kenji; Gayley, Ken; Oskinova, Lida |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2013-06-10 |
| 言語 | eng |
| 内容記述 | Delta Ori is the nearest massive, single-lined eclipsing binary (O9.5 II + B0.5III). As such it serves as a fundamental calibrator of the mass-radius-luminosity relation in the upper HR diagram. It is also the only eclipsing O-type binary system which is bright enough to be observable with the CHANDRA gratings in a reasonable exposure. Studies of resolved X-ray line complexes provide tracers of wind mass loss rate and clumpiness; occultation by the X-ray dark companion of the line emitting region can provide direct spatial information on the location of the X-ray emitting gas produced by shocks embedded in the wind of the primary star. We obtained phase-resolved spectra with Chandra in order to determine the level of phase-dependent vs. secular variability in the shocked wind. Along with the Chandra observations we obtained simultaneous photometry from space with the Canadian MOST satellite to help understand the relation between X-ray and photospheric variability. |
| NASA分類 | Astronomy |
| レポートNO | GSFC-E-DAA-TN9832 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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