A spectroscopic investigation of the O-type star population in four Cygnus OB associations. II. Determination of the fundamental parameters [PDF]
, 2015 Aims. Having established the binary status of nineteen O-type stars located in four Cygnus OB associations, we now determine their fundamental parameters to constrain their properties and their evolutionary status.
L. Mahy +4 more
semanticscholar +1 more source
Open Astronomy, 2011 White dwarf stars are traditionally found to have surface compositions made primarily of hydrogen or helium. However, a new family has recently been uncovered, the so-called hot DQ white dwarfs, which have surface compositions dominated by carbon and ...
Dufour P. +3 more
doaj +1 more source
Studying the UV Mg II Resonance Lines in 20 Be Stars
Open Astronomy, 2011 Using the GR model, we analyze the UV Mg II resonance lines in the spectra of 20 Be stars of different spectral subtypes, in order to detect the presence of satellite or discrete absorption components. The values of some physical parameters – rotational,
Antoniou A. +3 more
doaj +1 more source
Analysis of Interstellar Extinction towards the Hypergiant Cyg OB2 No. 12
Open Astronomy, 2016 The Cyg OB2 stellar association hosts an entire zoo of unique objects, and among them – an enigmatic star Cyg OB2 No. 12 (Schulte 12, MT 304). MT 304 is enigmatic not only due to its highest luminosity (according to various estimates, it is one of the ...
Maryeva O. V. +3 more
doaj +1 more source
Fundamental Parameters of CP Stars [PDF]
Highlights of Astronomy, 1998 The quest for accurate fundamental parameters (M, R, Teff log g, v sin i) of CP stars has been a lasting problem ever since the nature and origin of these stars has been discussed. The main reason for the difficulty lies in the anomalous colours of these stars, linked with their abundance anomalies which are responsible for complicated blocking and ...
openaire +2 more sources
The Solar Twin Planet Search. I. Fundamental parameters of the stellar sample [PDF]
, 2014 Context. We are carrying out a search for planets around a sample of solar twin stars using the HARPS spectrograph. The goal of this project is to exploit the advantage offered by solar twins to obtain chemical abundances of unmatched precision.
I. Ramírez +13 more
semanticscholar +1 more source
Wide Field Multicolor CCD Photometry in the Vicinity of the Open Cluster King 7
Open Astronomy, 2010 We present the results of CCD photometry in the seven-color Vilnius system for 1549 stars down to V ∼16 mag in a 1.5 square degree field around the cluster King 7, at the Perseus and Camelopardalis border.
Zdanavičius J. +3 more
doaj +1 more source
Determining fundamental parameters of QCD on the lattice [PDF]
Nuclear Physics B - Proceedings Supplements, 2006 We summarize the status of determinations of fundamental parameters of QCD by the ALPHA Collaboration.
openaire +4 more sources
Fundamental Parameters of Cepheids: Masses and Multiplicity [PDF]
AIP Conference Proceedings, 2009 Masses determined from classical Cepheids in binary systems are a primary test of both pulsation and evolutionary calculations. The first step is to determine the orbit from ground-based radial velocities. Complementary satellite data from Hubble, FUSE, IUE, and Chandra provide full information about the system. A summary of recent results on masses is
Nancy Remage Evans +2 more
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BANYAN. IV. FUNDAMENTAL PARAMETERS OF LOW-MASS STAR CANDIDATES IN NEARBY YOUNG STELLAR KINEMATIC GROUPS—ISOCHRONAL AGE DETERMINATION USING MAGNETIC EVOLUTIONARY MODELS [PDF]
, 2014 Based on high-resolution optical spectra obtained with ESPaDOnS at Canada–France–Hawaii Telescope, we determine fundamental parameters (Teff, R, Lbol, log g, and metallicity) for 59 candidate members of nearby young kinematic groups.
L. Malo +7 more
semanticscholar +1 more source