Skip navigation
Skip navigation

Infrared spectroscopy of symbiotic stars. VIII. Orbits for three s-type systems: Ae arae, y coronae Australis, and SS 73-147

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

Description

With new infrared radial velocities we have computed orbits of the M giants in three southern S-type symbiotic systems. AE Ara and SS 73-147 have circular orbits with periods of 803 and 820days, respectively. The eccentric orbit of Y CrA has a period that is about twice as long, 1619days. Except for CH Cyg it is currently the S-type symbiotic system with the longest period for which a spectroscopic orbit has been determined. The Paschen δ emission line velocities of AE Ara are nearly in...[Show more]

dc.contributor.authorFekel, Francis C
dc.contributor.authorHinkle, Kenneth H
dc.contributor.authorJoyce, Richard R
dc.contributor.authorWood, Peter R
dc.date.accessioned2015-12-07T22:55:30Z
dc.identifier.issn0004-6256
dc.identifier.urihttp://hdl.handle.net/1885/28405
dc.description.abstractWith new infrared radial velocities we have computed orbits of the M giants in three southern S-type symbiotic systems. AE Ara and SS 73-147 have circular orbits with periods of 803 and 820days, respectively. The eccentric orbit of Y CrA has a period that is about twice as long, 1619days. Except for CH Cyg it is currently the S-type symbiotic system with the longest period for which a spectroscopic orbit has been determined. The Paschen δ emission line velocities of AE Ara are nearly in antiphase with the M giant absorption feature velocities and result in a mass ratio of 2.7. Emission lines in the 1.005 μm region for the other two symbiotic systems are not good proxies for the hot components in those systems. There is no evidence that these three symbiotics are eclipsing. With spectral classes of M5.5 or M6, the three giants presumably also have velocity variations that result from pulsations, but we have been unable to identify specific pulsation periods in the absorption line velocity residuals.
dc.publisherUniversity of Chicago Press
dc.sourceAstronomical Journal
dc.subjectKeywords: Binaries: symbiotic; Infrared: stars; Stars: individual (AE Ara, Y CrA, SS 73-147); Stars: late-type
dc.titleInfrared spectroscopy of symbiotic stars. VIII. Orbits for three s-type systems: Ae arae, y coronae Australis, and SS 73-147
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume139
dc.date.issued2010
local.identifier.absfor020110 - Stellar Astronomy and Planetary Systems
local.identifier.ariespublicationf2965xPUB58
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.description.embargo2037-12-31
local.bibliographicCitation.issue4
local.bibliographicCitation.startpage1315
local.bibliographicCitation.lastpage1326
local.identifier.doi10.1088/0004-6256/139/4/1315
dc.date.updated2016-02-24T08:30:43Z
local.identifier.scopusID2-s2.0-77349103038
local.identifier.thomsonID000275496900002
CollectionsANU Research Publications

Download

File Description SizeFormat Image
01_Fekel_Infrared_spectroscopy_of_2010.pdf604.17 kBAdobe PDF    Request a copy


Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.

Updated:  19 May 2020/ Responsible Officer:  University Librarian/ Page Contact:  Library Systems & Web Coordinator