Reference : NGTS clusters survey - III. A low-mass eclipsing binary in the Blanco 1 open cluster ...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/263817
NGTS clusters survey - III. A low-mass eclipsing binary in the Blanco 1 open cluster spanning the fully convective boundary
English
Smith, Gareth D. [Astrophysics Group, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, UK]
Gillen, Edward [Astronomy Unit, Queen Mary University of London, Mile End Road, London E1 4NS, UK; Astrophysics Group, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, UK]
Queloz, Didier [Astrophysics Group, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, UK]
Hillenbrand, Lynne A. [Department of Astronomy, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA]
Acton, Jack S. [School of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK]
Alves, Douglas R. [Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile]
Anderson, David R. [Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK]
Bayliss, Daniel [Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK]
Briegal, Joshua T. [Astrophysics Group, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, UK]
Burleigh, Matthew R. [School of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK]
Casewell, Sarah L. [School of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK]
Delrez, Laetitia mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic >]
Dransfield, Georgina [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK]
Ducrot, Elsa [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic >]
Gill, Samuel [Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK]
Gillon, Michaël mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic >]
Goad, Michael R. [School of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK]
Günther, Maximilian N. [Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA]
Henderson, Beth A. [School of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK]
Jenkins, James S. [Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile; Núcleo de Astronomía, Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Avenida Ejército 441, Santiago, Chile]
Jehin, Emmanuel mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Moyano, Maximiliano [Instituto de Astronomía, Universidad Católica del Norte, Angamos 0610, 1270709 Antofagasta, Chile]
Murray, Catriona A. [Astrophysics Group, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, UK]
Pedersen, Peter P. [Astrophysics Group, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, UK]
Sebastian, Daniel [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic >]
Thompson, Samantha [Astrophysics Group, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, UK]
Tilbrook, Rosanna H. [School of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK]
Triaud, Amaury H. M. J. [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK]
Vines, Jose I. [Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile]
Wheatley, Peter J. [Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK)]
1-Nov-2021
Monthly Notices of the Royal Astronomical Society
Oxford University Press
507
5991
Yes
International
0035-8711
1365-2966
Oxford
United Kingdom
[en] binaries: eclipsing ; binaries: spectroscopic ; stars: evolution ; stars: fundamental parameters ; stars: low mass ; open clusters and associations: individual: Blanco 1
[en] We present the discovery and characterization of an eclipsing binary identified by the Next Generation Transit Survey in the ~115-Myr-old Blanco 1 open cluster. NGTS J0002-29 comprises three M dwarfs: a short-period binary and a companion in a wider orbit. This system is the first well-characterized, low-mass eclipsing binary in Blanco 1. With a low mass ratio, a tertiary companion, and binary components that straddle the fully convective boundary, it is an important benchmark system, and one of only two well-characterized, low-mass eclipsing binaries at this age. We simultaneously model light curves from NGTS, TESS, SPECULOOS, and SAAO, radial velocities from VLT/UVES and Keck/HIRES, and the system's spectral energy distribution. We find that the binary components travel on circular orbits around their common centre of mass in Porb = 1.098 005 24 ± 0.000 000 38 d, and have masses Mpri = 0.3978 ± 0.0033 M⊙ and Msec = 0.2245 ± 0.0018 M⊙, radii Rpri = 0.4037 ± 0.0048 R⊙ and Rsec = 0.2759 ± 0.0055 R⊙, and effective temperatures $T_{\rm pri}=\mbox{$3372\, ^{+44}_{-37}$}$ K and $T_{\rm sec}=\mbox{$3231\, ^{+38}_{-31}$}$ K. We compare these properties to the predictions of seven stellar evolution models, which typically imply an inflated primary. The system joins a list of 19 well-characterized, low-mass, sub-Gyr, stellar-mass eclipsing binaries, which constitute some of the strongest observational tests of stellar evolution theory at low masses and young ages.
Professionals
http://hdl.handle.net/2268/263817
10.1093/mnras/stab2374
https://ui.adsabs.harvard.edu/abs/2021MNRAS.507.5991S

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