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A deep large-area search for very low-mass members of the Hyades open cluster


Dobbie, PD and Kenyon, F and Jameson, RF and Hodgkin, ST and Hambly, NC and Hawkins, MRS, A deep large-area search for very low-mass members of the Hyades open cluster, Monthly Notices of the Royal Astronomical Society, 329, (3) pp. 543-555. ISSN 0035-8711 (2002) [Refereed Article]

Copyright Statement

Copyright 2002 RAS

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DOI: doi:10.1046/j.1365-8711.2002.05002.x


We 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.

Item Details

Item Type:Refereed Article
Keywords:techniques: photometric; surveys; stars: low-mass, brown dwarfs; open clusters and associations: individual: Hyades; infrared: stars
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Stellar astronomy and planetary systems
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Dobbie, PD (Dr Paul Dobbie)
ID Code:81185
Year Published:2002
Web of Science® Times Cited:27
Deposited By:Mathematics and Physics
Deposited On:2012-11-26
Last Modified:2013-06-26

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