Results 231 to 240 of about 9,374 (262)
Extended main sequences in star clusters. [PDF]
Fundam ResLi C, Milone AP, Sun W, de Grijs R.
europepmc +1 more source
Harnessing the power of machine learning for crop improvement and sustainable production. [PDF]
Front Plant SciKhatibi SMH, Ali J.
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A binary origin for ‘blue stragglers’ in globular clusters [PDF]
Nature, 2009 Blue stragglers in globular clusters are abnormally massive stars that should have evolved off the stellar main sequence long ago. There are two known processes that can create these objects: direct stellar collisions and binary evolution. However, the relative importance of these processes has remained unclear.
Christian Knigge +2 more
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Blue stragglers in open clusters [PDF]
Astronomy and Astrophysics, 2001 We performed for the rst time a detailed LTE spectroscopic study of a sample of blue straggler stars in the moderately old open cluster NGC 7789. For eight stars the parameters and abundances of several elements were determined. The cluster members show a remarkable surface magnesium deciency which is quite unusual for late B - early A stars.
D Schönberner, S M Andrievsky
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Radial velocities of blue stragglers in M3
Publications of the Astronomical Society of the Pacific, 1983The authors have obtained 1 A resolution spectra of five blue stragglers in M3 all with mv ≥ 17.3 using the MMT spectrograph and photon-counting Reticon. The spectra cover the range 4580 A to 5450 A, and except for Hβ are devoid of strong features. From measurements of the Hβ lines in the five blue stragglers and three velocity standards the authors ...
F. H., Jr. Chaffee, H. D. Ables
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Allan Sandage: Blue Stragglers
2021One of the more recent stellar discoveries was made by noticing something out of place in globular cluster Messier 3 (M3) (Fig. 19.1).
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