Browsing Articles by Author "Turner, David Gerald, 1945-"

Browsing Articles by Author "Turner, David Gerald, 1945-"

Sort by: Order: Results:

  • Thumbnail
    On the crucial cluster Andrews-Lindsay 1 and a 4% distance solution for its planetary nebula 
    Majaess, Daniel J.; Carraro, G.; Moni Bidin, C.; Bonatto, C.; Turner, David Gerald, 1945-; Moyano, M.; Berdnikov, L.; Giorgi, E. (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 ...

  • Thumbnail
    On the existence of young embedded clusters at high Galactic latitude 
    Turner, David Gerald, 1945-; Carraro, G.; Panko, E. A. (Oxford University Press, 2017-05-24)
    Careful analyses of photometric and star count data available for the nine putative young clusters identified by Camargo et al. at high Galactic latitudes reveal that none of the groups contain early-type stars, and most ...

  • Thumbnail
    On the form of the Spitzer Leavitt Law and its dependence on metallicity 
    Majaess, Daniel J.; Turner, David Gerald, 1945-; Gieren, W. (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, ...

  • Thumbnail
    Photoelectric observations of southern Cepheids in 2001 
    Berdnikov, Leonid N.; Turner, David Gerald, 1945- (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 ...

  • Thumbnail
    A photometric investigation of cluster membership for the Cepheid BB Sagittarii 
    Turner, David Gerald, 1945-; Pedreros, Mario (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 ...

  • Thumbnail
    The pulsation mode and distance of the Cepheid FF Aquilae 
    Turner, David Gerald, 1945-; Kovtyukh, V. V.; Luck, R. E.; Berdnikov, L. N. (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 ...


  • Thumbnail
    The pulsation mode of the Cepheid Polaris 
    Turner, David Gerald, 1945-; Kovtyukh, V. V.; Usenko, I. A.; Gorlova, N. I. (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 ...


  • Thumbnail
    Reddenings of FGK supergiants and classical Cepheids from spectroscopic data 
    Kovtyukh, V. V.; Soubiran, C.; Luck, R. E.; Turner, David Gerald, 1945-; Belik, S. I.; Andrievsky, S. M.; Chekhonadskikh, F. A. (Oxford University Press, 2008)
    Accurate and homogeneous atmospheric parameters (T[subscript eff], log g, V[subscript t], [Fe/H]) are derived for 74 FGK non-variable supergiants from high-resolution, high signal-to-noise ratio, echelle spectra. Extremely ...

  • Thumbnail
    A search for OB associations near Southern long-period Cepheids. IV. XY Carinae, GT Carinae, WZ Sagittarii, and SW Velorum 
    Turner, David Gerald, 1945-; Danks, T. A.; Forbes, Douglas (American Astronomical Society, 1993-03)
    We report UBV photometry for fields surrounding four long-period Cepheids in the Southern Milky Way. No potential early-type companions are detected around XY Car, which appears to be relatively isolated. However, an ...

  • Thumbnail
    A search for OB associations near southern long-period Cepheids. V. AQ Puppis and V620 Puppis 
    Turner, David Gerald, 1945-; van den Bergh, S.; Younger, P. F.; Majaess, Daniel J.; Pedreros, M. H.; Berdnikov, L. N. (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 ...

  • Thumbnail
    Strengthening the open cluster distance scale via VVV photometry 
    Majaess, Daniel J.; Turner, David Gerald, 1945-; Bidin, C. Moni; Geisler, D.; Borissova, J.; Minniti, D.; Bonatto, C.; Gieren, W.; Carraro, G.; Kurtev, R. (EDP Sciences, 2012-01)
    Approximately 14% of known Galactic open clusters possess absolute errors ≤20% as evaluated from n ≥ 3 independent distance estimates, and the statistics for age estimates are markedly worse. That impedes such diverse ...

  • Thumbnail
    The young open cluster Stock 16: an example of star formation in an elephant trunk? 
    Turner, David Gerald, 1945- (American Astronomical Society, 1985-05-01)
    UBV photometry is presented for 33 stars in the young open cluster Stock 16 lying in the H II region RCW 75, and these observations are used to obtain new values for the reddening (E[subscript B-V] = 0.49 [plus or minus] ...

Search DSpace


Browse

My Account