TY - JOUR
T1 - The revised orbit of the δ Sco system
AU - Tycner, C.
AU - Ames, A.
AU - Zavala, R. T.
AU - Hummel, C. A.
AU - Benson, J. A.
AU - Hutter, D. J.
N1 - Funding Information:
The Navy Prototype Optical Interferometer is a joint project of the Naval Research Laboratory and the US Naval Observatory, in cooperation with Lowell Observatory, and is funded by the Office of Naval Research and the Oceanographer of the Navy. C.T. acknowledges, with thanks, grant support from Research Corporation for Science Advancement. C.T. and A.A. thank the Physics Department at Central Michigan University for support. Facility: NPOI
PY - 2011/3/1
Y1 - 2011/3/1
N2 - In anticipation of the possible collision between a circumstellar disk and the secondary star in the highly eccentric binary system δ Scorpii, high angular resolution interferometric observations have been acquired, aimed at revising the binary parameters. The Navy Prototype Optical Interferometer was used to spatially resolve the binary components in 2000 and over a period between 2005 and 2010. The interferometric observations are used to obtain the angular separations and orientations of the two stellar components at all epochs for which data have been obtained, including 2005 and 2006, for which, based on previous studies, there was some uncertainty as to if the signature of binarity can be clearly detected. The results of this study represent the most complete and accurate coverage of the binary orbit of this system to date and allow for the revised timing of the upcoming periastron passage that will occur in 2011 to be obtained.
AB - In anticipation of the possible collision between a circumstellar disk and the secondary star in the highly eccentric binary system δ Scorpii, high angular resolution interferometric observations have been acquired, aimed at revising the binary parameters. The Navy Prototype Optical Interferometer was used to spatially resolve the binary components in 2000 and over a period between 2005 and 2010. The interferometric observations are used to obtain the angular separations and orientations of the two stellar components at all epochs for which data have been obtained, including 2005 and 2006, for which, based on previous studies, there was some uncertainty as to if the signature of binarity can be clearly detected. The results of this study represent the most complete and accurate coverage of the binary orbit of this system to date and allow for the revised timing of the upcoming periastron passage that will occur in 2011 to be obtained.
KW - techniques: interferometric
UR - http://www.scopus.com/inward/record.url?scp=79953667650&partnerID=8YFLogxK
U2 - 10.1088/2041-8205/729/1/L5
DO - 10.1088/2041-8205/729/1/L5
M3 - Article
AN - SCOPUS:79953667650
SN - 2041-8205
VL - 729
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 1 PART II
M1 - L5
ER -