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Infrared spectroscopy of symbiotic stars. X. Orbits for three S-type systems: V1044 Centauri, Hen 3-1213, and SS 73-96

Fekel, Francis C; Hinkle, Kenneth H; Joyce, Richard R; Wood, Peter R

Description

Employing new infrared radial velocities, we have computed orbits of the cool giants in three southern S-type symbiotic systems. The orbit for V1044 Cen, an M5.5 giant, has a period of 985 days and a modest eccentricity of 0.16. Hen 3-1213 is a K4 giant, yellow symbiotic with an orbital period of 533 days and a similar eccentricity of 0.18. For the M2 giant SS 73-96 the orbital period is 828 days, and this system has a somewhat larger eccentricity of 0.26. Measurement of the H i Paschen δ...[Show more]

dc.contributor.authorFekel, Francis C
dc.contributor.authorHinkle, Kenneth H
dc.contributor.authorJoyce, Richard R
dc.contributor.authorWood, Peter R
dc.date.accessioned2016-06-14T23:20:07Z
dc.identifier.issn0004-6256
dc.identifier.urihttp://hdl.handle.net/1885/103207
dc.description.abstractEmploying new infrared radial velocities, we have computed orbits of the cool giants in three southern S-type symbiotic systems. The orbit for V1044 Cen, an M5.5 giant, has a period of 985 days and a modest eccentricity of 0.16. Hen 3-1213 is a K4 giant, yellow symbiotic with an orbital period of 533 days and a similar eccentricity of 0.18. For the M2 giant SS 73-96 the orbital period is 828 days, and this system has a somewhat larger eccentricity of 0.26. Measurement of the H i Paschen δ emission lines, which may at least partially reflect the motion of the secondary in SS 73-96, results in a mass ratio of 2.4 for the M giant relative to the presumed white dwarf. The estimated orbital inclinations of V1044 Cen and Hen 3-1213 are low, about 40°. However, for SS 73-96 the predicted inclination is 90°, and so an ephemeris for eclipses of the secondary or the hot nebula surrounding it is provided. A search of the orbital velocity residuals of V1044 Cen and SS 73-96 for pulsation periods produced no realistic or convincing period for either star.
dc.publisherUniversity of Chicago Press
dc.rightsAuthor/s retain copyright
dc.sourceAstronomical Journal
dc.titleInfrared spectroscopy of symbiotic stars. X. Orbits for three S-type systems: V1044 Centauri, Hen 3-1213, and SS 73-96
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume150
dc.date.issued2015
local.identifier.absfor020100 - ASTRONOMICAL AND SPACE SCIENCES
local.identifier.ariespublicationU3488905xPUB5607
local.type.statusPublished Version
local.contributor.affiliationFekel, Francis C, Tennessee State University
local.contributor.affiliationHinkle, Kenneth H, National Optical Astronomy Observatory
local.contributor.affiliationJoyce, Richard R, National Optical Astronomy Observatory
local.contributor.affiliationWood, Peter R, College of Physical and Mathematical Sciences, ANU
local.bibliographicCitation.issue2
local.identifier.doi10.1088/0004-6256/150/2/48
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2016-06-14T08:45:42Z
local.identifier.scopusID2-s2.0-84938405820
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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