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Browsing Articles by Author "Majaess, Daniel J."
Now showing items 1-20 of 23
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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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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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(American Astronomical Society, 2015-01-20)We report the discovery of a pair of extremely reddened classical Cepheid variable stars located in the Galactic plane behind the bulge, using near-infrared (NIR) time-series photometry from the VISTA Variables in the Vía ...
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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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(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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(EDP Sciences, 2014-01)Context. Fundamental parameters characterizing the end-state of intermediate-mass stars may be constrained by discovering planetary nebulae (PNe) in open clusters (OCs). Cluster membership may be exploited to establish the ...
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(EDP Sciences for European Southern Observatory, 2012-09)Context. The ESO Public Survey “VISTA Variables in the Vía Láctea” (VVV) provides deep multi-epoch infrared observations for unprecedented 562 sq. degrees of the Galactic bulge, and adjacent regions of the disk. Aims. The ...
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Massive open star clusters using the VVV survey II. Discovery of six clusters with Wolf-Rayet stars (EDP Sciences for European Southern Observatory, 2013-01)Context. The ESO Public Survey “VISTA Variables in the Vía Láctea” (VVV) provides deep multi-epoch infrared observations for an unprecedented 562 sq. degrees of the Galactic bulge, and adjacent regions of the disk. Nearly ...
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(EDP Sciences for European Southern Observatory, 2013-04)The new multi-epoch near-infrared VISTA Variables in the Vía Láctea (VVV) survey is sampling 562 deg[superscript 2] of the Galactic bulge and adjacent regions of the disk. Accurate astrometry established for the region ...
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(IOP Publishing Limited, 2012-03-10)New and existing UBVJHKs, spectroscopic, NOMAD, Hubble Space Telescope, and revised Hipparcos observations are employed to determine properties for δ Cep and its host star cluster. The multi-faceted approach ...
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(IOP Publishing, 2011-11-10)The putative association between the 10.d 8 classical Cepheid TW Nor and the open cluster Lyngå 6 has generated considerable debate in the literature. New JHKs photometry in tandem with existing ...
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(EDP Sciences, 2014)Context. VISTA Variables in the Vía Láctea (VVV) is one of six ESO Public Surveys using the 4 meter Visible and Infrared Survey Telescope for Astronomy (VISTA). The VVV survey covers the Milky Way bulge and an adjacent ...
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(EDP Sciences, 2014-07)Andrews-Lindsay 1 is a pertinent open cluster because it may host the planetary nebula (PN) PHR 1315-6555, yet ambiguities linger concerning its fundamental parameters (>50% scatter). New multiband BV JHW1−4 ...
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(American Astronomical Society, 2013-08-01)The form and metallicity dependence of Spitzer mid-infrared Cepheid relations are a source of debate. Consequently, Spitzer 3.6 and 4.5 [mu]m period–magnitude and period–color diagrams were re-examined via robust routines, ...
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(IOP Publishing Limited, 2012-12)A photometric UBV survey is presented for 610 stars in a region surrounding the Cepheid AQ Puppis and centered southwest of the variable, based upon photoelectric measures for 14 stars and calibrated iris photometry of ...
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(American Astronomical Society, 2013-12)A group of suspected protostars in a dark cloud northwest of the young (∼2 Myr) cluster Berkeley 59 and two sources in a pillar south of the cluster have been studied in order to determine their evolutionary stages and ...
Now showing items 1-20 of 23