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Browsing by Author "Turner, David Gerald, 1945-"
Now showing items 1-20 of 41
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(Halifax, N.S. : Saint Mary's University, 2008)We consider the possibility of cluster membership for 13 planetary nebulae that are located in close proximity to open clusters lying in their lines of sight. The short lifetimes and low sample size of intermediate-mass ...
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(Halifax, N.S. : Saint Mary's University, 1992)The high-velocity GL 490 outflow has been observed at high spatial resolution with the JCMT in three rotational transitions (J = 2[right arrow]1 of HBBW = 21", J = 3[right arrow]2 of HPBW = 15" and J = 6[right arrow] 5)of ...
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(Halifax, N.S. : Saint Mary's University, 1994)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. ...
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(Halifax, N.S. : Saint Mary's University, 2006)The variability of the type C semi-regular (SRC) M3.5 Ia supergiant variable BC Cyg is examined with reference to measurements of its photographic B magnitude derived from 866 archival plates in the Harvard and Sternberg ...
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(Halifax, N.S. : Saint Mary's University, 1998)The results of UBV CCD photometry are presented for a newly discovered open cluster, as well as new photometry for thirty-seven members of the open cluster HM 1. The new open cluster, to be designated OCL 1104-610, has a ...
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(Oxford Academic, 2012-05)The parameters for the newly discovered open cluster Alessi 95 are established on the basis of available photometric and spectroscopic data, in conjunction with new observations. Colour excesses for spectroscopically ...
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(American Astronomical SocietyIOP Publishing, 2012-07-10)New X-ray (XMM-Newton) and JHK[subscript s] (Observatoire du Mont-Megantic) observations for members of the star cluster Alessi 95, which Turner et al. discovered hosts the classical Cepheid SU Cas, were used in tandem ...
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(Oxford Academic, 2012-04)Preliminary constraints are placed on a cluster of young stellar objects (J2000 02:54:31.4 +69:20:32.5) discovered in the field of the classical Cepheid SU Cas. The Wide-field Infrared Survey Explorer (WISE) 3.4-, 4.6-, ...
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(American Astronomical Society, 1989-12)Reddening line parameters in the UBV system have been derived for early-type stars in six restricted (2[degrees symbol]-3[degrees symbol] radius) Milky Way fields associated with open clusters and/or associations. The ...
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(Oxford University Press, 2016-02-01)Multicolour photometry of the stellar populations in five fields in the third Galactic quadrant centred on the clusters NGC 2215, NGC 2354, Haffner 22, Ruprecht 11, and ESO489 SC01 is interpreted in terms of a warped and ...
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Concerning the classical Cepheid VI[subscript C] Wesenheit function's strong metallicity dependence (IOP Publishing, 2011-11-10)Evidence is presented which supports findings that the classical Cepheid VIC period Wesenheit function is relatively insensitive to metallicity. The viability of a recently advocated strong metallicity dependence ...
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(EDP Sciences, 2016-10)Near-infrared color-excess and extinction ratios are essential for establishing the cosmic distance scale and probing the Galaxy, particularly when analyzing targets attenuated by significant dust. A robust determination ...
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(Halifax, N.S. : Saint Mary's University, 2012)Evidence is presented implying that the classical Cepheid VI[subscript c] period-Wesenheit function is relatively insensitive to metallicity. The results indicate that variations in chemical composition among Cepheids are ...
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(IOP Publishing Limited, 2012-03-20)New and existing CORAVEL, UBVJHKs, HST, HIP/Tycho, ARO, KPNO, and DAO observations imply that the fundamental Cepheid calibrator ζ Gem is a cluster member. The following parameters were inferred for ζ ...
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(EDP Sciences, 2013-07)A new X-ray, UBVRIc, and JHKs study of the young cluster Westerlund 2 was undertaken to resolve discrepancies tied to the cluster’s distance. Existing spectroscopic observations for ...
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(Halifax, N.S. : Saint Mary's University, 1993)Existing calibrations of white dwarf luminosities have invariably relied upon the inhomogeneous sample of refractor parallaxes published in the General Catalogue of Trigonometric Parallaxes. We have completed a new calibration ...
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(EDP Sciences, 2014-12)This study helps increase awareness of the pernicious effects of photometric contamination (crowding/blending), since it can propagate an undesirable systematic offset into the cosmic distance scale. The latest Galactic ...
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(American Astronomical Society, 1986-07)New photoelectric UBVphotometry is presented for stars in NGC 6087, the cluster containing the 9[d over dot]75 Cepheid S Normae. The data are used with published photoelectric observations for cluster stars to redetermine ...
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(American Astronomical Society, 1992-09)New photoelectric UBV photometry of 27 stars and spectroscopic observations of 12 stars are presented for NGC 129, the cluster containing the 8[d over dot]00 Cepheid DL Cas. The photometry is used to restandardize previously ...
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(American Astronomical Society, 1992-11)New photoelectric UBV photometry of 45 stars and spectroscopic observations of 24 stars are presented for NGC 1647, the cluster associated with the 3[d with dot below]15 Cepheid SZ Tauri. The resulting photometry, spectral ...
Now showing items 1-20 of 41