Results 151 to 160 of about 334,935 (372)
oMEGACat. IV. Constraining the Ages of Omega Centauri Subgiant Branch Stars with HST and MUSE
The Astrophysical JournalWe present age estimates for over 8100 subgiant branch (SGB) stars in Omega Centauri ( ω Cen) to study its star formation history. Our large data set, which combines multi-wavelength Hubble Space Telescope photometry with MUSE metallicities, provides an ...
C. Clontz +15 more
doaj +1 more source
The Astrophysical Journal Supplement Series, 2023 Despite having data for over 10 ^9 stars from Gaia, less than 10 ^4 star clusters and candidates have been discovered. In particular, distant star clusters are rarely identified, due to the challenges posed by heavy extinction and great distance. However,
Zhihong He +7 more
doaj +1 more source
Globular cluster contributions to Galactic halo assembly [PDF]
arXiv, 2012 I discuss a search for red giant stars in the Galactic halo with light-element abundances similar to second-generation globular cluster stars, and discuss the implications of such a population for globular cluster formation models and the balance between in situ star formation and accretion for the assembly of the Galactic halo.
arxiv
Gravitational wave sources from inspiralling globular clusters in the Galactic Centre and similar environments [PDF]
, 2018 We model the inspiral of globular clusters (GCs) towards a galactic nucleus harboring a supermassive black hole (SMBH), a leading scenario for the formation of nuclear star clusters.We consider the case of GCs containing either an intermediate-mass ...
M. A. Sedda, A. Gualandris
semanticscholar +1 more source
Molecular Oncology, EarlyView.Prostate cancer is a leading malignancy with significant clinical heterogeneity in men. An 11‐gene signature derived from dysregulated epithelial cell markers effectively predicted biochemical recurrence‐free survival in patients who underwent radical surgery or radiotherapy.
Zhuofan Mou, Lorna W. Harries
wiley +1 more source
The inner Galactic globular clusters
EPJ Web of Conferences, 2013 Galactic globular clusters located towards the inner regions of the Milky Way have been historically neglected, mainly due to the difficulties caused by the presence of an elevated extinction by foreground dust, and high field star densities along the ...
Mateo M. +3 more
doaj +1 more source
Accretion of Gas by Stars in Globular Clusters [PDF]
Symposium - International Astronomical Union, 1980 One of the two classes of models that have been proposed for the production of X-rays in globular clusters involves accretion of gas by a more or less massive (10 M⊙–1000 M⊙) black hole at cluster centre (Cowie, Ostriker and Stark 1978 - COS). The accretion rates are not large (~1017 g s−1), and we may enquire how such rates compare with those for ...
openaire +2 more sources
Molecular Oncology, EarlyView.MET variants in the N‐lobe of the kinase domain, found in hereditary papillary renal cell carcinoma, require ligand stimulation to promote cell transformation, in contrast to other RTK variants. This suggests that HGF expression in the microenvironment is important for tumor growth in such patients. Their sensitivity to MET inhibitors opens the way for
Célia Guérin +14 more
wiley +1 more source
FAST Discovery of Eight Isolated Millisecond Pulsars in NGC 6517
The Astrophysical Journal LettersWe present the discovery of eight isolated millisecond pulsars in globular cluster (GC) NGC 6517 using the Five-hundred-meter Aperture Spherical radio Telescope (FAST).
Dejiang Yin +16 more
doaj +1 more source
Formation of new stellar populations from gas accreted by massive young star clusters
, 2016 Stars in star clusters are thought to form in a single burst from a common progenitor cloud of molecular gas. However, massive, old globular clusters -- with ages greater than 10 billion years and masses of several hundred thousand solar masses -- often ...
de Grijs, Richard +6 more
core +1 more source