[PDF] Top 20 Early-type stars in the core of the young open cluster Westerlund 2
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Early-type stars in the core of the young open cluster Westerlund 2
... solve the issue of the missing ionizing photons. Some of the early-type stars might still be hidden from our view by the material of their natal ... Voir le document complet
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A spectroscopic investigation of early-type stars in the young open cluster Westerlund 2
... emission in Hα suggesting that the other Balmer absorptions could be filled-in by ...bluewards of Hα that they tentatively interpreted as a blueshifted Hα absorption as- sociated with an ... Voir le document complet
15
X-ray and optical spectroscopy of the massive young open cluster IC 1805
... those of normal O-stars and those of WN-type Wolf-Rayet stars (Willis & Stickland, 1980; Conti et ...fference in the L X /L bol ratio for O If + stars were re- ... Voir le document complet
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Chandra monitoring of the very massive binary WR20a and the young massive cluster Westerlund 2
... on the dis- tance towards the cluster of 2 – 5 kpc, based on the median X-ray luminosity of PMS stars in the mass range .... In fact, it seems ... Voir le document complet
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Galaxy evolution in overdense environments at high redshift: passive early-type galaxies in a cluster at redshift 2
... study of galaxy populations in the central region of the IRAC-selected, X-ray detected galaxy cluster Cl J1449+0856 at z = ...sample of spectroscopic and photometric ... Voir le document complet
18
Cygnus OB2 – a young globular cluster in the Milky Way
... are of OB spectral type, resulting in a total stellar mass between ...on the blue and red plates of the Dig- itized Sky Survey (DSS), reaching limiting magnitudes around 20 m ... Voir le document complet
11
Pulsating B-type Stars in the Open Cluster NGC 884: Frequencies, Mode Identification, and Asteroseismology
... ≤ 2 per observed frequency, allowing rotational splitting, concerns seven frequencies in five β Cep stars: Oo 2246 with ` = 2 for f 1 and a radial mode for f 3 , Oo 2299 with ` = 2 for ... Voir le document complet
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An XMM-Newton view of the young open cluster NGC 6231-III. Optically faint X-ray sources
... is the age spread among the low- mass PMS objects (∼ 11 Myr) that exceeds the main se- quence lifetime of the massive O stars in the ...photometry of NGC ... Voir le document complet
14
An XMM-Newton view of the young open cluster NGC 6231 - I. The catalogue
... review of the recent literature, there is an obvi- ous body of observations showing that, besides the expected X-ray emission from massive stars, a large population of X- ray ... Voir le document complet
21
Early-type stars in the young open cluster IC 1805. II. The probably single stars HD 15570 and HD 15629, and the massive binary/triple system HD 15558
... vary. The RVs obtained after 20 iterations were used to compute an SB2 or- bital solution, following the technique described by Sana et ...(2003). The orbital parameters are given in Table ... Voir le document complet
17
Early-type stars in the young open cluster NGC 2244 and in the Monoceros OB2 association. I. The multiplicity of O-type stars
... orders in the 3850–6850 Å spectral range (R = 42000) mounted at the ...2005. The mean signal-to- noise ratio for our targets was 150 for an exposure time ranging from 10 min to 1 ...hour. ... Voir le document complet
17
An XMM-Newton observation of the Lagoon Nebula and the very young open cluster NGC 6530
... observation of the Lagoon Nebula and the very young open cluster NGC 6530 emission from a hot plasma around H ...observed in a few H II regions ...emission in ... Voir le document complet
15
Two spotted and magnetic early B-type stars in the young open cluster NGC2264 discovered by MOST and ESPaDOnS
... Acknowledgments The research leading to these results has received funding from the European Research Council under the European Commu- nity’s Seventh Framework Programme (FP7/2007 – 2013)/ERC grant ... Voir le document complet
13
The Role of Young Professionals in Driving the Integration of Early Warning Systems
... involvement The Regional Integrated Multi-hazard Early Warning System for Africa and Asia places young professionals in the Flood Forecasting and Warning Centre and the ... Voir le document complet
10
XMM-Newton X-ray study of early type stars in the Carina OB1 association
... rich in massive binaries (see e.g. Levato et al. 1991). The properties of several eclipsing or el- lipsoidal early-type binaries (HD 93205, Morrell et ...recently. The components ... Voir le document complet
21
Variations in the lithium abundances of turn off stars in the globular cluster 47 Tuc
... at the same time erase the claimed “diffusion signa- tures” also in Fe, Ca and ...Ti. The question is therefore still not settled. At variance, the GC NGC 6752, which is about a fac- ... Voir le document complet
9
The lower mass function of the young open cluster Blanco 1: from 30 Mjup to 3 Mo
... to the Pleiades MF given by Moraux et al. (2003), the two clusters having about the same age but different ...other young open clusters, star forming regions and also for the ... Voir le document complet
19
B fields in OB stars (BOB): on the detection of weak magnetic fields in the two early B-type stars beta CMa and epsilon CMa
... times in relation to the stellar pulsation period (3–4% of the ∼6- hour period), we checked the stability of the spectral lines along each sequence, therefore highlighting ... Voir le document complet
16
The MiMeS survey of magnetism in massive stars: Magnetic analysis of the O-type stars
... Out of the eight prototypical classical Oe stars proposed by Frost & Conti ( 1976 ), only two were observed in the context of the MiMeS survey: HD 155806 and HD ... Voir le document complet
40
On the importance of the few most massive stars: the ionizing cluster of NGC 588
... other in the optical range and cannot be discriminated by the use of the nebular Balmer lines, they strongly vary in the UV ...Fortunately, the intrinsic UV and ... Voir le document complet
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