Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...346..160s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 346, Nov. 1, 1989, p. 160-167.
Astronomy and Astrophysics
Astrophysics
86
Angular Velocity, Open Clusters, Pre-Main Sequence Stars, Stellar Rotation, Stellar Spectrophotometry, Absorption Spectra, Color-Color Diagram, Echelle Gratings, H Alpha Line, Light Curve, Stellar Mass, Velocity Distribution
Scientific paper
About 30 new, low-mass members of the young open cluster Alpha Persei are identified via a proper-motion study and subsequent photometric and spectroscopic observations. Membership in the cluster is confirmed for a number of the fainter proper-motion candidates from Heckman, Dieckvoss, and Kox (1956). Coordinates, finding charts, BVRI photometry, and rotational velocities are provided for most of the stars. At least two of the stars show peculiar H-alpha emission profiles, with weak but very broad emission wings, and relatively narrow absorption reversals. The rotational velocity distribution for low-mass stars in the Alpha Per cluster are compared with recently derived rotational velocity distributions for T Tauri stars, placing strong constraints on the mechanisms for angular momentum loss during pre-main-sequence evolution.
Hartmann Lee W.
Jones Burton F.
Stauffer John R.
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