J/other/Ap/54.81 Spectroscopy of θ1 Ori C system (Vitrichenko+, 2011)
Runaway spectral double star from the theta1 Ori C system.
Vitrichenko E.A., Tsymbal V., Bychkova L, Bychkov V.
<Astrophysics, 54, 81 (2011)>
=2011Ap.....54...81V 2011Ap.....54...81V
ADC_Keywords: Stars, double and multiple; Spectroscopy; Equivalent widths
Keywords: stars: runaway stars - stars: binary stars - individual: theta1 Ori C
Abstract:
The spectral-double system escaping from multiple system theta1 Ori C
is investigated. Radial velocities of both components are measured,
for them are constructed and solved curves of radial velocity.
Physical parameters of stars and their chemical composition are
determined.
Description:
High quality spectra of the triple star theta1 Ori C in the Orion
Trapezium show that one more star in this system is a spectral binary.
Its components are young main-sequence A-stars with masses of 1.3 and
1.4 solar mass. Radial velocities of stellar lines indicate that this
binary runs away from the system in the direction to an observer with
a large negative velocity. For the primary star (C3p) and the
secondary (C3s) a list of lines, wavelength and equivalent width are
given.
Objects:
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RA (2000) DE Designation(s)
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05 35 16.5 -05 23 23 tet01 Ori C = HD 37022
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 28 376 Equivalent widths of lines for the
θ1 Ori C3 stars
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Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Ion Name of ion
6- 12 F7.2 0.1nm lambda [4600/6600] Wavelength in Angstroms
15- 20 F6.4 0.1nm EWC3p ? Equivalent width for C3p component
23- 28 F6.4 0.1nm EWC3s ? Equivalent width for C3s component
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Acknowledgements:
Nataly Bondar', otbn(at)mail.ru
(End) Eduard Vitrichenko [SRI, Russia], Patricia Vannier [CDS] 17-Mar-2011