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- W2020876320 abstract "view Abstract Citations (65) References (26) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Pre--Main-Sequence Stars in the Young Cluster IC 2391 Stauffer, John ; Hartmann, Lee W. ; Jones, Burton F. ; McNamara, Brian R. Abstract Seven or eight new, late-type members of the poor open cluster IC 2391 are identified, and membership is confirmed for two other stars. The new members fall approximately along a 3 x 10 to the 7th yr isochrone, which is the age estimated for the cluster on the basis of it super main-seqence turnoff. Echelle spectra were obtained for the most probable cluster members. Most show H-alpha in emission and a strong Li 6707 A absorption line, and a few are rapid rotators. The Li abundances for cluster stars cooler than the sun are considerably less than the primordial Li abundance, providing the first direct evidence for substantial premain-sequence Li burning. The rotational velocities show a range from about 15 to 150 km/s, with a distribution of rotational velocities not significantly different from that observed for low-mass stars in the Pleiades. Publication: The Astrophysical Journal Pub Date: July 1989 DOI: 10.1086/167592 Bibcode: 1989ApJ...342..285S Keywords: Open Clusters; Pre-Main Sequence Stars; Stellar Evolution; Stellar Spectrophotometry; Absorption Spectra; Abundance; Color-Magnitude Diagram; Echelle Gratings; H Alpha Line; Lithium; Astrophysics; CLUSTERS: OPEN; STARS: EMISSION-LINE; STARS: EVOLUTION; STARS: PRE--MAIN-SEQUENCE full text sources ADS | data products SIMBAD (11) Related Materials (1) Erratum: 1990ApJ...350..480S" @default.
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- W2020876320 date "1989-07-01" @default.
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- W2020876320 title "Pre-main-sequence stars in the young cluster IC 2391" @default.
- W2020876320 doi "https://doi.org/10.1086/167592" @default.
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