The young massive SMC cluster NGC 330 seen by MUSE II. Multiplicity properties of the massive-star population
J. Bodensteiner,Hugues Sana,Chen Wang,Norbert Langer,Laurent Mahy,G. Banyard,A. de Koter,S. E. de Mink,Chris Evans,Y. Götberg,Lee Patrick,Fabian Schneider,Frank Tramper +12 more
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In this paper, the multiplicity properties of the massive stars in NGC 330 in the Small Magellanic Cloud were investigated using integral field spectroscopy (IFS) to search for imprints of stellar evolution.Abstract:
Observations of massive stars in young open clusters (< ~8 Myr) have shown that a majority of them are in binary systems, most of which will interact during their life. Populations of massive stars older than ~20 Myr allow us to probe the outcome of such interactions after many systems have experienced mass and angular momentum transfer. Using multi-epoch integral-field spectroscopy, we investigate the multiplicity properties of the massive-star population in NGC 330 (~40 Myr) in the Small Magellanic Cloud to search for imprints of stellar evolution on the multiplicity properties. From six epochs of VLT/MUSE observations supported by adaptive optics we extract spectra and measure radial velocities for stars brighter than F814W = 19. We identify single-lined spectroscopic binaries through significant RV variability as well as double-lined spectroscopic binaries, and quantify the observational biases for binary detection. The observed spectroscopic binary fraction is 13.2+/-2.0 %. Considering period and mass ratio ranges from log(P)=0.15-3.5, and q = 0.1-1.0, and a representative set of orbital parameter distributions, we find a bias-corrected close binary fraction of 34 +8 -7 %. This seems to decline for the fainter stars, which indicates either that the close binary fraction drops in the B-type domain, or that the period distribution becomes more heavily weighted towards longer orbital periods. Both fractions vary strongly in different regions of the color-magnitude diagram which probably reveals the imprint of the binary history of different groups of stars. We provide the first homogeneous RV study of a large sample of B-type stars at a low metallicity. The overall bias-corrected close binary fraction of B stars in NGC 330 is lower than the one reported for younger Galactic and LMC clusters. More data are needed to establish whether this result from an age or a metallicty effect.read more
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Identifying quiescent compact objects in massive Galactic single-lined spectroscopic binaries
Laurent Mahy,Hugues Sana,Tomer Shenar,K. Sen,Norbert Langer,Pablo Marchant,Michael Abdul-Masih,G. D. Banyard,J. Bodensteiner,Dominic M. Bowman,K. Dsilva,M. Fabry,C. Hawcroft,Soetkin Janssens,T. Van Reeth,Carly Eldridge +15 more
TL;DR: In this paper , the authors studied 32 Galactic O-type stars that were reported as single-lined spectroscopic binaries (SB1s) in the literature and performed spectral disentangling to extract putative signatures of secondary companions from the composite spectra.
Journal ArticleDOI
Exploring the role of binarity in the origin of the bimodal rotational velocity distribution in stellar clusters
Sebastian Kamann,Nate Bastian,Nate Bastian,Nate Bastian,Christopher Usher,I. Cabrera-Ziri,I. Cabrera-Ziri,S. Saracino +7 more
TL;DR: In this paper, the binary channel was used to search for differences in the binary fraction of the slow and fast rotating populations of NGC 1850, a 100Myr massive cluster in the LMC.
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The Tarantula massive binary monitoring. VI. Characterisation of hidden companions in 51 single-lined O-type binaries: A flat mass-ratio distribution and black-hole binary candidates
Tomer Shenar,Hugues Sana,Laurent Mahy,J. Maíz Apellániz,Paul A. Crowther,Mariusz Gromadzki,Artemio Herrero,Norbert Langer,Pablo Marchant,O. Schneider,K. Sen,Igor Soszyński,Silvia Toonen +12 more
TL;DR: In this article , the hidden companions in 51 singlelined spectroscopic (SB1) O-type and evolved B-type binaries identified in the Large Magellanic Cloud (LMC) in the framework of the VLT-FLames Tarantula Survey (VFTS) and its follow-up, the Tarantula Massive Binary Monitoring (TMBM).
Journal ArticleDOI
Planet Hunters TESS IV: A massive, compact hierarchical triple star system TIC 470710327
Nora L. Eisner,Cole Johnston,Silvia Toonen,A. J. Frost,Soetkin Janssens,Chris Lintott,Suzanne Aigrain,Hugues Sana,Michael Abdul-Masih,K. Z. Arellano-C'ordova,Paul G. Beck,Emma Bordier,Emily Canon,Ana Escorza,Mattias Fabry,L. Hermansson,Steve B. Howell,Grant Miller,Shreeya Sheyte,Safaa Alhassan,Elisabeth Baeten,Frank Barnet,S.J. Bean,Mikael Bernau,D. Bundy,Marco Di Fraia,Francis M. Emralino,B.L. Goodwin,Peter Hermes,Tony Hoffman,Marc Huten,Roman Jan'ivcek,Samantha Lee,Michele Mazzucato,David J. Rogers,Michael P. Rout,Johann Sejpka,Christopher Tanner,Ivan Terentev,David Urvoy +39 more
TL;DR: In this paper , the authors report the discovery and analysis of a massive, compact, hierarchical triple system (TIC 470710327) initially identified by citizen scientists in data obtained by NASA's Transiting Exoplanet Survey Satellite (TESS).
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OUP accepted manuscript
TL;DR: In this article , VFTS spectroscopy of 73 Be-type stars, in the spectral-type range, B0-B3, is analyzed to estimate projected rotational velocities, radial velocity, and stellar parameters.
References
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PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code
Alessandro Bressan,Paola Marigo,Léo Girardi,Bernardo Salasnich,C. Dal Cero,S. Rubele,Ambra Nanni +6 more
TL;DR: In this work, extended sets of stellar evolutionary models for various initial chemical compositions are presented, while other set s with different metallicities and/or different distributions of heavy elements are being computed.
Journal ArticleDOI
Binary Interaction Dominates the Evolution of Massive Stars
Hugues Sana,S. E. de Mink,S. E. de Mink,A. de Koter,A. de Koter,Norbert Langer,Chris Evans,Mark Gieles,Eric Gosset,Robert G. Izzard,J.-B. Le Bouquin,Fabian Schneider +11 more
TL;DR: More than 70% of all massive stars will exchange mass with a companion, leading to a binary merger in one-third of the cases, greatly exceed previous estimates and imply that binary interaction dominates the evolution of massive stars, with implications for populations ofmassive stars and their supernovae.
Journal ArticleDOI
A New Generation of PARSEC-COLIBRI Stellar Isochrones Including the TP-AGB Phase
Paola Marigo,Léo Girardi,Alessandro Bressan,Philip Rosenfield,Bernhard Aringer,Yang Chen,Marco Dussin,Ambra Nanni,Giada Pastorelli,Thaíse S. Rodrigues,Thaíse S. Rodrigues,Michele Trabucchi,Sara Bladh,Julianne J. Dalcanton,Martin Groenewegen,Josefina Montalbán,Peter R. Wood +16 more
TL;DR: In this paper, the authors acknowledge the support from the ERC Consolidator Grant (CRA 1.05.01.94) and Partial Support Agreement (PSA) for the STARKEY project.
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