Results 11 to 20 of about 2,490 (267)
The Astrophysical Journal, 2023 We characterize the optical counterparts to the compact X-ray source population within the nearby spiral galaxy M81 using multiband Hubble Space Telescope (HST) imaging data.
Qiana Hunt +4 more
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Accretion of gas by globular cluster stars [PDF]
Astronomy & Astrophysics, 2002 11 pages; accepted for publication in Astronomy and ...
Thoul, Anne +6 more
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Axial Rotation of Globular Star Clusters [PDF]
Nature, 1936 THE axial rotation of globular star clusters has not yet been measured, so far as we know, from the differences of radial velocities at their opposite edges, but indirect evidence of their rotation is the observed ellipticity. The oblateness e of a rotating body depends on the ratio of the centrifugal force to the gravity at the star's surface ; that ...
Kopal, Zdeněk, Slouka, Hubert
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VARIABLE STARS IN THE GLOBULAR CLUSTER NGC 2808 [PDF]
The Astronomical Journal, 2013 The first calibrated broadband BVI time-series photometry is presented for the variable stars in NGC 2808, with observations spanning a range of twenty-eight years. We have also redetermined the variability types and periods for the variable stars identified previously by Corwin et al, revising the number of probable fundamental-mode RR Lyrae variables
Kunder, Andrea +4 more
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Searching for New Globular Clusters in M31 with Gaia EDR3
The Astrophysical Journal, 2023 We have found 50 new globular cluster (GC) candidates around M31 with Gaia Early Data Release 3 (EDR3), with the help of Pan-STARRS1 DR1 magnitudes and Pan-Andromeda Archaeological Survey (PAndAS) images.
Yilun Wang +7 more
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Variable stars in the globular cluster M 13 [PDF]
Astronomy & Astrophysics, 2003 10 pages, 9 figures, 5 tables, accepted for publication in ...
Kopacki, G. +2 more
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Variability in NGC 3201 Giant Stars
The Astronomical Journal, 2023 We present the analysis of 510 light curves in V and I bands of 255 giant stars in the globular cluster NGC 3201. Our aim is to expand the sample of new types of variables reported in a previous study. These variables show a short period ( P _V < 0.6 day)
C. C. Cortés +4 more
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Rotation in Globular Cluster stars [PDF]
Astronomy & Astrophysics, 2003 We present a derivation of upper limits to the rotation of Main Sequence stars in three globular clusters using spectra obtained during time allocated to the ESO Large Programs 165-L0263 and 167.D-0173, with UVES at VLT2 (Kueyen). The stars analyzed in this work do not show any evidence of high values of rotational velocities as far as the outer layers
S. Lucatello, R. G. Gratton
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Nature, 1888 PHYSICAL aggregations of stars may be broadly divided into “globular” and “irregular” clusters. Although, as might have been expected, the line of demarcation between the two classes is by no means sharply drawn, each has its own marked peculiarities. We shall limit our attention, in the present article, to the first kind.
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Origin of the Globular Star Clusters
Astrophysical Journal, 1968 P J E Peebles, R H Dicke
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