[PDF] Top 20 Cygnus OB2 – a young globular cluster in the Milky Way

... Kn¨odlseder: Cygnus OB2 – a young globular cluster in the Milky Way 543 elliptical shape of Cyg OB2 in the DSS data is produced ... Voir le document complet

... While a complex backward integration of optical young open clusters yields results near ...longer. The use of very young radio masers (age <1 Myr) located in front of spiral arms ... Voir le document complet

... that the object DDO 216-A1 is a substantial globular cluster at the center of Local Group galaxy DDO 216 (the Pegasus dwarf irregular), using Hubble Space Telescope ACS ...find ... Voir le document complet

... for the pilot study is around the massive star-forming complex W43 (l = ...at the intersection of the Galactic bar and the first spiral arm (Scutum-Centaurus Galactic arm, Nguyen Luong ... Voir le document complet

... 75 globular clusters. The bottom panel exemplifies how the stan- dard uncertainties on the cluster PM in declination vary as a function of the number of ... Voir le document complet

... explaining the Oosterhoff ...that globular clusters fell into two dis- tinct groups, Oosterhoff types I and II, traced by the mean period of their RRL stars, and the relative numbers of RR0 to ... Voir le document complet

... determination The fundamental parameters were determined by using the GIRFIT code from Fr´emat et ...fits the observed spectrum with theoretical ones obtained with TLUSTY and SYNSPEC codes from ... Voir le document complet

... decades the study of low-mass stars and brown dwarfs has bloomed into one of the most active fields in ...astronomy. The low-mass end of the main sequence from M, L, T and Y dwarfs ... Voir le document complet

... evolve in a similar way ? It appears clear that GCs exhibit a considerable diversity in their abundance ...and a marked enhancement of N. NGC 6752 displays a well defined ... Voir le document complet

... presented in Fig. 2 : with and without using the priors on the metallicity and distance modulus coming, respectively, from the spectroscopic analysis of Section 4 and the two RR Lyrae ... Voir le document complet

... on the detection, from observations obtained with the Apache Point Observatory Galactic Evolution Experiment spectroscopic survey, of a metal-poor ...among the second-generation population of ... Voir le document complet

... mag) the galaxy (see below ). The field stars contain a strong population of red clump (RC) stars, a relatively broad RGB, and an MS that is well populated across a wide range of ... Voir le document complet

... t a , the Cauchy criterion – which is supposed valid for this problem – then tell us that they are equal at each time : the distance between the center of mass of the cluster and ... Voir le document complet

... present the main results of a spectroscopic campaign devoted to the O-type stars in the young open cluster IC ...at the investigation of the multiplicity and ... Voir le document complet

... 6. The r-process element evolution in the Milky Way ...r-process in Fig. 5 , for the thin disc, thick disc, and the mrαr populations, using the working ... Voir le document complet

... If the accretion scenario is at work in GCs, one would expect that the pollution levels decrease from main se- quence to giant stars as the convective envelope deepens, and dilutes the ... Voir le document complet

... around the CH feature at 4323 Å. Shown as red lines are the best fit synthetic spectrum and those with [C/Fe] differing by ...measure the sodium abun- dance ratios from the 8193, 8194 Å doublet ... Voir le document complet

... preceding the conventional big bang model [73 –77] . The authors would like to thank Brian Keating, Michael ...to the Austrian National Bank (OENB) and the Bundesimmobiliengesellschaft (BIG) ... Voir le document complet

... comes in di fferent flavours. In some cases, it is clearly associated with a large (a factor 10 or more) in- crease in the count rate during a specific observation ... Voir le document complet

... versus A V and log P versus A i ) for the RR Lyrae variables is shown in ...17. The RRab stars have longer periods for a given amplitude than their counterparts in ... Voir le document complet