Results 41 to 50 of about 1,859,132 (364)
Clean catalogues of blue horizontal-branch stars using Gaia EDR3 [PDF]
A&A 654, A107 (2021), 2021 Context: Blue horizontal-branch stars are very old objects that can be used as markers in studies of the Galactic structure and formation history. To create a clean sky catalogue of blue horizontal-branch stars, we cross-matched the Gaia data release 2 (DR2) dataset with existing reference catalogues to define selection criteria based on Gaia DR2 ...
arxiv +1 more source
Person Re‐identification Based on Feature Erasure and Diverse Feature Learning
IET Computer Vision, 2022 Robust and comprehensive modelling of targets is the key to successful person re‐identification. However, some useful information may be ignored, since CNNs tend to learn from the most distinctive feature region of the human body. In the present study, a
Lu Peng +4 more
doaj +1 more source
Mathematics, 2021 About 90% of the world’s natural gas hydrates (NGH) exist in deep-sea formations, a new energy source with great potential for exploitation. There is distance from the threshold of commercial exploitation based on the single well currently used.
Hongyu Ye, Xuezhen Wu, Dayong Li
doaj +1 more source
CHRONOGRAPHY OF THE MILKY WAY’S HALO SYSTEM WITH FIELD BLUE HORIZONTAL-BRANCH STARS [PDF]
, 2015 In a pioneering effort, Preston et al. reported that the colors of blue horizontal-branch (BHB) stars in the halo of the Galaxy shift with distance, from regions near the Galactic center to about 12 kpc away, and interpreted this as a correlated ...
Rafael M. Santucci +8 more
semanticscholar +1 more source
Characterizing Fabric Anisotropy of Air-Pluviated Sands [PDF]
E3S Web of Conferences, 2019 Sand particles depositing through air generally align their largest dimensions in horizontal plane, forming a cross anisotropic fabric. Therefore, sands display varying strength, permeability, compressibility with directions.
Sun Quan +3 more
doaj +1 more source
Metallicities of Globular Clusters m3 and m5 from VI CCD Photometry [PDF]
Journal of Astronomy and Space Sciences, 2000 To derive the metallicities of M3 and M5, we used the shape of red giant branch, horizontal branch magnitude, and red giant branch bump on the (V - I) - V color magnitude diagrams.
Young-Jong Sohn, Hyun-Chul Lee
doaj +2 more sources
Meet the family − the catalog of known hot subdwarf stars
Open Astronomy, 2017 In preparation for the upcoming all-sky data releases of the Gaia mission, we compiled a catalog of known hot subdwarf stars and candidates drawn from the literature and yet unpublished databases.
Geier Stephan +8 more
doaj +2 more sources
Revisiting the variable star population in NGC 6229 and the structure of the horizontal branch [PDF]
, 2015 We report an analysis of new $V$ and $I$ CCD time-series photometry of the distant globular cluster NGC 6229. The principal aims were to explore the field of the cluster in search of new variables, and to Fourier decompose the RR Lyrae light curves in ...
A. Ferro +7 more
semanticscholar +1 more source
The strange hot horizontal-branch binary star in NGC 6752
Open Astronomy, 2018 M5865 is the only so-far confirmed close binary found in the extreme horizontal branch (EHB) of a globular cluster. A detailed study has recently proposed that this object could be a close system (period P=1.61 days) comprising a EHB and a main-sequence ...
Bidin Christian Moni
doaj +1 more source
The Na-O anticorrelation in horizontal branch stars. V. NGC 6723 [PDF]
, 2014 We used FLAMES+GIRAFFE (Medusa mode) at the VLT to obtain moderately high resolution spectra for 30 red horizontal branch (RHB) stars, 4 RR Lyrae variables, and 17 blue horizontal branch (BHB) stars in the low-concentration, moderately metal-rich ...
R. Gratton +9 more
semanticscholar +1 more source