Results 81 to 90 of about 41,067 (162)

Carbon and nitrogen abundances of stellar populations in the globular cluster M 2

open access: yes, 2012
We present CH and CN index analysis and C and N abundance calculations based on the low-resolution blue spectra of red giant branch (RGB) stars in the Galactic globular cluster NGC 7089 (M 2).
Lardo, C.   +3 more
core   +1 more source

Multiple populations in globular clusters. Lessons learned from the Milky Way globular clusters

open access: yes, 2012
Recent progress in studies of globular clusters has shown that they are not simple stellar populations, being rather made of multiple generations. Evidence stems both from photometry and spectroscopy.
A Bellini   +359 more
core   +1 more source

The Distance of the First Overtone RR Lyrae Variables in the MACHO LMC Database: A New Method to Correct for the Effects of Crowding

open access: yes, 2007
Previous studies have indicated that many of the RR Lyrae variables in the LMC have properties similar to the ones in the Galactic globular cluster M3.
A. V. Muzzin   +12 more
core   +1 more source

The origin of the spurious iron spread in the globular cluster NGC 3201

open access: yes, 2015
NGC 3201 is a globular cluster suspected to have an intrinsic spread in the iron content. We re-analysed a sample of 21 cluster stars observed with UVES-FLAMES at the Very Large Telescope and for which Simmerer et al.
Ferraro, F. R.   +4 more
core   +1 more source

Dorsal Anterior Cingulate Cortex Neurons as the Basis for the Gratton Effect [PDF]

open access: yesNeurosurgery, 2012
Robert A. McGovern, Guy M. McKhann
openaire   +1 more source

Chemical and kinematical properties of BSSs and HB stars in NGC 6397

open access: yes, 2012
We used three sets of high-resolution spectra acquired with the multifiber facility FLAMES at the Very Large Telescope of the European Southern Observatory to investigate the chemical and kinematical properties of a sample of 42 horizontal branch (HB ...
A. Mucciarelli   +46 more
core   +1 more source

Helium in first and second-generation stars in Globular Clusters from spectroscopy of red giants

open access: yes, 2010
(abridged) Recent spectroscopic and photometric observations show the existence of various generations of stars in GCs, differing in the abundances of products of H-burning at high temperatures (the main final product being He).
A. Bragaglia   +64 more
core   +1 more source

A differential chemical abundance scale for the globular cluster M5

open access: yes, 2010
We present LTE chemical abundances for five red giants and one AGB star in the Galactic globular cluster (GC) M5 based on high resolution spectroscopy using the MIKE spectrograph on the Magellan 6.5-m Clay telescope.
Andreas Koch   +35 more
core   +1 more source

Old stellar systems in UV: resolved and integrated properties

open access: yes, 2014
The UV properties of old stellar populations have been subject of intense scrutiny from the late sixties, when the UV-upturn in early type galaxies was first discovered. Because of their proximity and relative simplicity, Galactic globular clusters (GGCs)
Dalessandro, E.
core   +1 more source

Once Bitten, Twice Shy: On The Short-Lived Nature of Congruency Adaptation Effects

open access: yesFrontiers in Psychology, 2012
Wery P.M. van den Wildenberg   +3 more
doaj   +1 more source

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