Poster (Scientific congresses and symposiums)
The Chandra Delta Ori Large Project: Occultation Measurements of the Shocked Gas in the Nearest Eclipsing O-Star Binary
Corcoran, Michael; Nichols, Joy; Nazé, Yaël et al.
2013Massive Stars: From α to Ω, held 10-14 June 2013 in Rhodes, Greece
 

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Abstract :
[en] Delta Ori is the nearest massive, single-lined eclipsing binary (O9.5 II+OB, P=5^{d}.7324). High resolution X-ray spectrometry offers a unique opportunity to geometrically measure the dynamics of the shocked gas around the primary star. We summarize our recent campaign of phase-constrained high-resolution X-ray spectra obtained with the CHANDRA/HETGS plus high-precision photometry with MOST. These observations provide local measurement of the distribution of the embedded, X-ray emitting shocks in the wind of an O star via radial velocity variations and occultation effects, along with standard f/i ratio diagnostics, and enable us to look for correlations with the broad-band photometric variability. We discuss how these observations can help determine the primary star's clumping-corrected mass loss rate, and resolve critical uncertainties in our understanding of the connection between stellar and mass loss parameters.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Corcoran, Michael;  NASA/Goddard Space Flight Center/Universities Space Research Association
Nichols, Joy;  Smithsonian Astrophysical Observatory
Nazé, Yaël  ;  Université de Liège - ULiège > Groupe d'astrophysique des hautes énergies (GAPHE)
Rauw, Grégor  ;  Université de Liège - ULiège > Groupe d'astrophysique des hautes énergies (GAPHE)
Pollack, Andrew;  European Space Agency XMM-Newton Science Operations Centre
Moffat, Anthony;  Université de Montréal and Centre de Recherche en Astrophysique du Québec
Richardson, Noel;  Université de Montréal and Centre de Recherche en Astrophysique du Québec
Evans, Nancy;  Smithsonian Astrophysical Observatory
Hamaguchi, Kenji;  NASA/Goddard Space Flight Center/Department of Physics, University of Maryland
Oskinova, Lida;  Lehrstuhl Astrophysik der Universität Potsdam
Hamann, W.-R.;  Lehrstuhl Astrophysik der Universität Potsdam
Gull, Ted;  NASA/Goddard Space Flight Center/Department of Physics, University of Maryland
Ignace, Rico;  East Tennessee State University Dept. of Physics and Astronomy
Hole, Tabetha;  East Tennessee State University Dept. of Physics and Astronomy
Iping, Rosina;  Department of Physics, University of Maryland
Walborn, Nolan;  Space Telescope Science Institute
Hoffman, Jennifer;  Department of Physics & Astronomy, University of Denver
Lomax, Jamie;  Department of Physics & Astronomy, University of Denver
Waldron, Wayne;  Eureka Scientific Inc.
Owocki, Stan;  Department of Physics and Astronomy, University of Delaware
Maiz-Apellaniz, Jesus;  Instituto de Astrofísica de Andalucía-CSIC
Leutenegger, Maurice;  NASA/Goddard Space Flight Center/Department of Physics, University of Maryland
Hole, Tabetha;  Weber State University
Gayley, Ken;  Department of Physics, University of Iowa
Russell, Chris;  JSPS/Hokai-Gakuen University)
MOST Team
Convento Group
More authors (17 more) Less
Language :
English
Title :
The Chandra Delta Ori Large Project: Occultation Measurements of the Shocked Gas in the Nearest Eclipsing O-Star Binary
Publication date :
01 June 2013
Event name :
Massive Stars: From α to Ω, held 10-14 June 2013 in Rhodes, Greece
Event date :
10-14 June 2013
Audience :
International
Available on ORBi :
since 19 August 2013

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