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Browsing Articles by Subject "Cepheids"
Now showing items 1-20 of 26
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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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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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(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, 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 ...
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Galactic clusters with associated Cepheid variables. IV. C2128+488 (Anon. Platais) and V1726 Cygni (American Astronomical Society, 1994-05)New photoelectric UBV photometry of 32 stars, photographic UBV photometry of 120 stars, and spectroscopic observations of 8 stars are presented for C 2128+488 (Anon. Platais), the cluster associated with the 4[d over dot]237 ...
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(American Astronomical Society, 1997-06)Photoelectric and CCD photometry (to a limit of V=17.0) is presented for 61 and 243 stars, respectively--a total of 279 individual stars--in and about IC 1590, a young galactic cluster embedded in the nebulosity of NGC ...
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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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(American Astronomical Society, 1988-11)The Baade-Wesselink method has been reapplied to existing photometric and radial-velocity measures for the classical Cepheid [delta] Cephei, but a different approach to the analysis was adopted in which spectrophotometric ...
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(Oxford University Press, 2015-02)The quantity and quality of satellite photometric data strings is revealing details in Cepheid variation at very low levels. Specifically, we observed a Cepheid pulsating in the fundamental mode and one pulsating in the ...
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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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(American Astronomical Society, 2001-11)A total of 2097 photometric observations in the BVI[subscript c] system are presented for 117 Cepheids located in the southern hemisphere. The main purpose of the photometry is to provide new epochs of maximum brightness ...
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(American Astronomical Society, 1985-07)Photoelectric photometry (UBV and some VRI) is presented for the close pair of open clusters Cr 394 and NGC 6716 and for the 6[d over dot]64 classical Cepheid BB Sgr. Based upon the photometric data and star counts, the ...
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(IOP Publishing Limited, 2013-07-20)The determination of pulsation mode and distance for field Cepheids is a complicated problem best resolved by a luminosity estimate. For illustration a technique based on spectroscopic luminosity discrimination is applied ...
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(IOP Publishing Limited, 2013-01-01)A previously derived photometric parallax of 10.10 ± 0.20 mas, d = 99 ± 2 pc, is confirmed for Polaris by a spectroscopic parallax derived using line ratios in high dispersion spectra for the Cepheid. The ...
Now showing items 1-20 of 26