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A deep large-area search for very low-mass members of the Hyades open cluster
journal contribution
posted on 2023-05-17, 14:42 authored by Dobbie, PD, Kenyon, F, Jameson, RF, Hodgkin, ST, Hambly, NC, Hawkins, MRSWe present the results of a comprehensive I- and Z-band photometric survey of 10.5 deg2 of the Hyades to search for low-mass stellar and substellar members. The survey, which is ≳95 per cent photometrically complete to Ic ≈ 20.3, has unearthed a total of 20 candidates, 14 of which are previously uncatalogued. Despite follow-up observations indicating that nine display spectral energy distributions consistent with cluster membership, a detailed astrometric study of all 20 reveals that only one, the previously known stellar member RHy297, displays a proper motion typical of a Hyad. We discuss our failure to detect further low-mass members in terms of the shape of the present-day mass function of the Hyades and find that dynamical evolution has probably led to their preferential evaporation from the cluster.
History
Publication title
Monthly Notices of the Royal Astronomical SocietyVolume
329Pagination
543-555ISSN
0035-8711Department/School
School of Natural SciencesPublisher
Blackwell Publishing LtdPlace of publication
9600 Garsington Rd, Oxford, England, Oxon, Ox4 2DgRights statement
Copyright 2002 RASRepository Status
- Restricted