Results 21 to 30 of about 98,056 (310)
A Study of Be Stars in Clusters [PDF]
Symposium - International Astronomical Union, 1976 Calibrated spectrograms at Hα of 566 stars in 29 young galactic clusters led to the detection of 41 Be stars in clusters. Using cluster membership we have inferred ages and intrinsic (B – V) colors of Be stars to permit a discussion of their evolutionary states.Rotating stars can become Be stars in their early hydrogen burning evolution away from the ...
R. Schild, W. Romanishin
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Probing the Faintest Stars in a Globular Star Cluster [PDF]
Science, 2006 NGC 6397 is the second closest globular star cluster to the Sun. Using 5 days of time on the Hubble Space Telescope, we have constructed an ultradeep color-magnitude diagram for this cluster. We see a clear truncation in each of its two major stellar sequences.
Richer, Harvey B. +12 more
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Sub-clinical abnormalities detected by PET/MRI in household tuberculosis contacts
BMC Infectious Diseases, 2019 Background The understanding of early events following TB exposure is limited by traditional tests that rely on detection of an immune response to infection, which is delayed, or on imaging tests with low sensitivity for early disease.
James S. Molton +11 more
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Star cluster ecology -- IV. Dissection of an open star cluster: photometry [PDF]
Monthly Notices of the Royal Astronomical Society, 2001 reduced abstract, 33 pages (three separate color .jpg figures), submitted to ...
Portegies Zwart, S.F. +3 more
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The Astrophysical Journal, 2023 We present the first version release of SESAMME, a public, Python-based full spectrum fitting tool for Simultaneous Estimates of Star-cluster Age, Metallicity, Mass, and Extinction.
Logan H. Jones +5 more
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Star cluster ecology – V. Dissection of an open star cluster: spectroscopy [PDF]
Monthly Notices of the Royal Astronomical Society, 2004 17 pages, submitted to ...
Portegies Zwart, S.F. +3 more
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Lithopanspermia in Star-Forming Clusters [PDF]
Astrobiology, 2005 This paper considers the lithopanspermia hypothesis in star forming groups and clusters, where the chances of biological material spreading from one solar system to another is greatly enhanced (relative to the field) due to the close proximity of the systems and lower relative velocities. These effects more than compensate for the reduced time spent in
Adams, Fred C., Spergel, David N.
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The Star Formation History of the Milky Way’s Nuclear Star Cluster
The Astrophysical Journal, 2023 We report the first star formation history study of the Milky Ways nuclear star cluster (NSC), which includes observational constraints from a large sample of stellar metallicity measurements.
Zhuo Chen +8 more
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Intergalactic stars in the Fornax cluster [PDF]
Monthly Notices of the Royal Astronomical Society, 1997 We have identified ten candidate intergalactic planetary nebulae in the Fornax galaxy cluster. These objects were found during observations in 1992 and 1993 in three fields chosen well away from any Fornax galaxy at 15 arcmin, 30 arcmin, and 45 arcmin from the centre of Fornax.
Theuns, T., Warren, S.J.
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Scientific Reports, 2022 There is an urgent need to validate new drug targets and identify small molecules that possess activity against both drug-resistant and drug-sensitive bacteria.
Deepika Chaudhary +13 more
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