A photometric investigation of the fields of two short-period Cepheids in Cygnus

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dc.contributor.advisor Turner, David Gerald, 1945-
dc.creator Mandushev, Georgi Iliev
dc.date.accessioned 2011-05-09T12:31:20Z
dc.date.available 2011-05-09T12:31:20Z
dc.date.issued 1994
dc.identifier.other QB838 M36 1994
dc.identifier.uri http://library2.smu.ca/xmlui/handle/01/22047
dc.description xi, 95 leaves : ill. ; 28 cm.
dc.description Includes abstract.
dc.description Includes bibliographical references (leaves 90-93).
dc.description.abstract Photoelectric, photographic and CCD photometry, as well as spectroscopic observations and proper motion data for stars in the fields of the short-period galactic Cepheids V1726 Cygni and SU Cygni are presented and analyzed. The existence of a sparsely populated cluster associated with V1726 Cyg has been confirmed, and a new, loose stellar group has been found in the vicinity of SU Cyg. The newly obtained distance modulus for C2128+488 (Anon. Platais), the cluster associated with V1726 Cyg, is V[subscript 0] - M[subscript V] = 10.98 [plus or minus] 0.02, corresponding to a distance of 1568 [plus or minus] 13 pc. The spatial coincidence and the close match of the radial velocity, proper motion and age of V1726 Cyg with those of the cluster indicate a high probability of cluster membership for the Cepheid. The space reddening of V1726 Cyg, found from two neighbouring stars, is E[subscript B-V] = 0.43 [plus or minus] 0.02 and its luminosity as a cluster member is <M[subscript V]> = -3.42 [plus or minus] 0.07. The newly found group of stars in the vicinity of SU Cyg has a distance modulus of V[subscript 0] - M[subscript V] = 10.98 [plus or minus] 0.02 (d = 1040 pc). It contains mostly early A to late F-type stars, with a few early B-type stars whose membership is more uncertain. A reddening of E [subscript B-V] = 0.16 has been determined for SU Cyg from a nearby (20") star having an accurate MK spectral type. The probable discovery of a new planetary nebula, located about 3' south of SU Cyg, and a possible new cluster 17' west of SU Cyg, are also reported. (Abstract shortened by UMI.)
dc.description.provenance Made available in DSpace on 2011-05-09T12:31:20Z (GMT). No. of bitstreams: 0 en
dc.language.iso en
dc.publisher Halifax, N.S. : Saint Mary's University
dc.subject.lcc QB838
dc.subject.lcsh Cepheids
dc.subject.lcsh Astronomical photometry
dc.subject.lcsh Stars -- Clusters
dc.subject.lcsh Cygnus X-3
dc.title A photometric investigation of the fields of two short-period Cepheids in Cygnus
dc.type Text
thesis.degree.name Master of Science in Astronomy
thesis.degree.level Masters
thesis.degree.discipline Astronomy and Physics
thesis.degree.grantor Saint Mary's University (Halifax, N.S.)
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