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NGTS clusters survey - I. Rotation in the young benchmark open cluster Blanco 1

Gillen, Edward and Briegal, Joshua T. and Hodgkin, S. T. and Foreman-Mackey, D and Van Leeuwen, F. and Jackman, James A. G. and McCormac, James and West, R. G. and Queloz, Didier and Bayliss, D. and Goad, Michael R. and Watson, C. A. and Wheatley, P. and Belardi, C. and Burleigh, M. and Casewell, S and Jenkins, James S. and Raynard, L. and Smith, Alexis M S and Tilbrook, Rosanna H. (2020) NGTS clusters survey - I. Rotation in the young benchmark open cluster Blanco 1. Monthly Notices of the Royal Astronomical Society, 192 (1), pp. 1008-1024. Oxford University Press. doi: 10.1093/mnras/stz3251. ISSN 0035-8711.

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Abstract

We determine rotation periods for 127 stars in the ∼115-Myr-old Blanco 1 open cluster using ∼200 d of photometric monitoring with the Next Generation Transit Survey. These stars span F5-M3 spectral types (1.2 M☉ ≳ M ≳ 0.3 M☉) and increase the number of known rotation periods in Blanco 1 by a factor of four. We determine rotation periods using three methods: Gaussian process (GP) regression, generalized autocorrelation function (G-ACF), and Lomb-Scargle (LS) periodogram, and find that the GP and G-ACF methods are more applicable to evolving spot modulation patterns. Between mid-F and mid-K spectral types, single stars follow a well-defined rotation sequence from ∼2 to 10 d, whereas stars in photometric multiple systems typically rotate faster. This may suggest that the presence of a moderate-to-high mass ratio companion inhibits angular momentum loss mechanisms during the early pre-main sequence, and this signature has not been erased at ∼100 Myr. The majority of mid-F to mid-K stars display evolving modulation patterns, whereas most M stars show stable modulation signals. This morphological change coincides with the shift from a well-defined rotation sequence (mid-F to mid-K stars) to a broad rotation period distribution (late-K and M stars). Finally, we compare our rotation results for Blanco 1 to the similarly aged Pleiades: the single-star populations in both clusters possess consistent rotation period distributions, which suggests that the angular momentum evolution of stars follows a well-defined pathway that is, at least for mid-F to mid-K stars, strongly imprinted by ∼100 Myr.

Item URL in elib:https://elib.dlr.de/136411/
Document Type:Article
Title:NGTS clusters survey - I. Rotation in the young benchmark open cluster Blanco 1
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gillen, EdwardAstrophysics Group, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, UKUNSPECIFIED
Briegal, Joshua T.Astrophysics Group, Cavendish Laboratory, J. J. Thomson Avenue, Cambridge CB3 0HE, UKUNSPECIFIED
Hodgkin, S. T.Institute of Astronomy, University of Cambridge, Madingley Rise, Cambridge, CB3 0HA, UKUNSPECIFIED
Foreman-Mackey, DCenter for Computational Astrophysics, Flatiron Institute, New York, NY 10010, USAUNSPECIFIED
Van Leeuwen, F.Institute of Astronomy, University of Cambridge, Madingley Rise, Cambridge CB3 0HA, UKUNSPECIFIED
Jackman, James A. G.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, UKUNSPECIFIED
McCormac, JamesDepartment 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, UKUNSPECIFIED
West, R. G.University of Warwick, UKUNSPECIFIED
Queloz, DidierAstrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE, UKUNSPECIFIED
Bayliss, D.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, UKUNSPECIFIED
Goad, Michael R.Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKUNSPECIFIED
Watson, C. A.Astrophysics Research Centre, Queen's University Belfast, Belfast BT7 1NN, UKUNSPECIFIED
Wheatley, P.Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7ALUNSPECIFIED
Belardi, C.Department of Physics and Astronomy, Leicester Institute of Space and Earth Observation, University of Leicester, University Road, Leicester LE1 7RH, UKUNSPECIFIED
Burleigh, M.Dept. of Physics and Astronomy, University of Leicester, United KingdomUNSPECIFIED
Casewell, SDepartment of Physics and Astronomy, Leicester Institute of Space and Earth Observation, University of Leicester, University Road, Leicester LE1 7RHUNSPECIFIED
Jenkins, James S.Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile; Centro de Astrofísica y Tecnologías Afines (CATA), Casilla 36-D, Santiago, ChileUNSPECIFIED
Raynard, L.Department of Physics and Astronomy, Leicester Institute of Space and Earth Observation, University of Leicester, LE1 7RH, UKUNSPECIFIED
Smith, Alexis M SAlexis.Smith (at) dlr.dehttps://orcid.org/0000-0002-2386-4341
Tilbrook, Rosanna H.Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKUNSPECIFIED
Date:2020
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:192
DOI :10.1093/mnras/stz3251
Page Range:pp. 1008-1024
Publisher:Oxford University Press
ISSN:0035-8711
Status:Published
Keywords:stars: rotation; stars: variables: general; binaries: general; open clusters and associations: individual: Blanco 1; Astrophysics - Solar and Stellar Astrophysics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Projekt COROT Beteiligung (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Smith, Dr Alexis M S
Deposited On:06 Oct 2020 08:19
Last Modified:06 Oct 2020 08:19

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